int main(void)
{
/* -1- Init System*/
HAL_Init();
SystemClock_Config();
/* -2- Calculate Prescaler */
//We want the Timer to run with 8MHz (the maximum, since we're running of the internal Clock, which runs at 8MHz, without PLL)
uhPrescalerValue = (uint32_t) (SystemCoreClock / 8000000) - 1;
/* -3- Enable Clocks*/
//GPIO
__GPIOA_CLK_ENABLE();
//TIMER
__TIM1_CLK_ENABLE();
/* -4- Configure GPIO Pin*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF2_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* -5- Configure Timer*/
TIM_HandleStruct.Instance = TIM1;
TIM_HandleStruct.Init.Prescaler = uhPrescalerValue;
TIM_HandleStruct.Init.Period = PERIOD_VALUE;
TIM_HandleStruct.Init.ClockDivision = 0;
TIM_HandleStruct.Init.CounterMode = TIM_COUNTERMODE_UP;
TIM_HandleStruct.Init.RepetitionCounter = 0;
HAL_TIM_PWM_Init(&TIM_HandleStruct);
/* -6- Configure PWM-Output*/
TIM_OC_InitStruct.OCMode = TIM_OCMODE_PWM1;
TIM_OC_InitStruct.OCPolarity = TIM_OCPOLARITY_HIGH;
TIM_OC_InitStruct.OCFastMode = TIM_OCFAST_DISABLE;
TIM_OC_InitStruct.OCNPolarity = TIM_OCNPOLARITY_HIGH;
TIM_OC_InitStruct.OCIdleState = TIM_OCIDLESTATE_RESET;
TIM_OC_InitStruct.OCNIdleState = TIM_OCNIDLESTATE_RESET;
TIM_OC_InitStruct.Pulse = CMP_VAL;
HAL_TIM_PWM_ConfigChannel(&TIM_HandleStruct, &TIM_OC_InitStruct, TIM_CHANNEL_3);
/* -7- Enable Timer and PWM Output*/
HAL_TIM_PWM_Start(&TIM_HandleStruct, TIM_CHANNEL_3);
while (1) {
/* -8- Illuminate LED*/
for (CMP_VAL = 0; CMP_VAL != (PERIOD_VALUE); CMP_VAL++) {
TIM_OC_InitStruct.Pulse = CMP_VAL;
HAL_TIM_PWM_ConfigChannel(&TIM_HandleStruct, &TIM_OC_InitStruct, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&TIM_HandleStruct, TIM_CHANNEL_3);
HAL_Delay(1);
}
/* -8- Wait a bit at full brightness*/
HAL_Delay(1000);
/* -10- Dim LED*/
for (CMP_VAL = (PERIOD_VALUE); CMP_VAL != 0; CMP_VAL--) {
TIM_OC_InitStruct.Pulse = CMP_VAL;
HAL_TIM_PWM_ConfigChannel(&TIM_HandleStruct, &TIM_OC_InitStruct, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&TIM_HandleStruct, TIM_CHANNEL_3);
HAL_Delay(1);
}
/* -11- Leave it dark*/
HAL_Delay(1000);
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Compute the prescaler value to have TIM3 counter clock equal to 36000000 Hz */
uhPrescalerValue = (uint32_t)(SystemCoreClock / 36000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* -----------------------------------------------------------------------
TIM3 Configuration: generate 1 PWM signal with clock prescaler selection feature activated using __HAL_RCC_TIMCLKPRESCALER()
which allow to double the output frequency.
In this example TIM3 input clock (TIM3CLK) is set to 4 * APB1 clock (PCLK1), since
Timer clock prescalers selection activated (TIMPRE bit from RCC_DCKCFGR register is set).
TIM3CLK = 4 * PCLK1
PCLK1 = HCLK / 4
=> TIM3CLK = HCLK = SystemCoreClock
For TIM3CLK equal to SystemCoreClock and prescaler equal to (5 - 1), TIM3 counter clock
is computed as follows:
TIM3 counter clock = TIM3CLK / (Prescaler + 1)
= SystemCoreClock / (Prescaler + 1)
= 36MHz
For ARR equal to (1800 - 1), the TIM3 output clock is computed as follows:
TIM3 output clock = TIM3 counter clock / (ARR + 1)
= 20KHZ
The TIM3 CCR1 register value is equal to 900, so the TIM3 Channel 1 generates a
PWM signal with a frequency equal to 20 KHz and a duty cycle equal to 50%:
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR + 1)* 100 = 50%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
----------------------------------------------------------------------- */
/* Timer clock prescalers selection activation */
__HAL_RCC_TIMCLKPRESCALER(RCC_TIMPRES_ACTIVATED);
/* Initialize TIMx peripheral as follows:
+ Prescaler = (SystemCoreClock / 36000000) - 1
+ Period = (1800 - 1)
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIMx;
TimHandle.Init.Prescaler = uhPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sConfig.Pulse = PULSE1_VALUE;
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if (HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 2 */
if (HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 3 */
if (HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start channel 4 */
if (HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Configure the system clock to have a system clock = 72 Mhz */
SystemClock_Config();
/* Compute the prescaler value to have TIM3 counter clock equal to 24 MHz */
uhPrescalerValue = (uint32_t) (SystemCoreClock / 24000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* -----------------------------------------------------------------------
TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles.
In this example TIM3 input clock (TIM3CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM3CLK = 2 * PCLK1
PCLK1 = HCLK / 2
=> TIM3CLK = HCLK = SystemCoreClock
To get TIM3 counter clock at 24 MHz, the prescaler is computed as follows:
Prescaler = (TIM3CLK / TIM3 counter clock) - 1
Prescaler = (SystemCoreClock /24 MHz) - 1
To get TIM3 output clock at 36 KHz, the period (ARR)) is computed as follows:
ARR = (TIM3 counter clock / TIM3 output clock) - 1
= 665
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR)* 100 = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR)* 100 = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR)* 100 = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR)* 100 = 12.5%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f3xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
----------------------------------------------------------------------- */
/* Initialize TIMx peripheral as follows:
+ Prescaler = (SystemCoreClock/24000000) - 1
+ Period = 665
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIMx;
TimHandle.Init.Prescaler = uhPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = PULSE4_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief SYSTICK callback.
* @param None
* @retval None
*/
void HAL_SYSTICK_Callback(void)
{
uint8_t *buf;
uint16_t Temp_X, Temp_Y = 0x00;
uint16_t NewARR_X, NewARR_Y = 0x00;
if (DemoEnterCondition != 0x00)
{
buf = USBD_HID_GetPos();
if((buf[1] != 0) ||(buf[2] != 0))
{
USBD_HID_SendReport (&hUSBDDevice,
buf,
4);
}
Counter ++;
if (Counter == 10)
{
/* Reset Buffer used to get accelerometer values */
Buffer[0] = 0;
Buffer[1] = 0;
/* Disable All TIM4 Capture Compare Channels */
HAL_TIM_PWM_Stop(&htim4, TIM_CHANNEL_1);
HAL_TIM_PWM_Stop(&htim4, TIM_CHANNEL_2);
HAL_TIM_PWM_Stop(&htim4, TIM_CHANNEL_3);
HAL_TIM_PWM_Stop(&htim4, TIM_CHANNEL_4);
/* Read Acceleration*/
BSP_ACCELERO_GetXYZ(Buffer);
/* Set X and Y positions */
X_Offset = Buffer[0];
Y_Offset = Buffer[1];
/* Update New autoreload value in case of X or Y acceleration*/
/* Basic acceleration X_Offset and Y_Offset are divide by 40 to fir with ARR range */
NewARR_X = TIM_ARR - ABS(X_Offset/40);
NewARR_Y = TIM_ARR - ABS(Y_Offset/40);
/* Calculation of Max acceleration detected on X or Y axis */
Temp_X = ABS(X_Offset/40);
Temp_Y = ABS(Y_Offset/40);
MaxAcceleration = MAX_AB(Temp_X, Temp_Y);
if(MaxAcceleration != 0)
{
/* Reset CNT to a lowest value (equal to min CCRx of all Channels) */
__HAL_TIM_SET_COUNTER(&htim4,(TIM_ARR-MaxAcceleration)/2);
if (X_Offset < ThreadholdAcceleroLow)
{
/* Sets the TIM4 Capture Compare for Channel1 Register value */
/* Equal to NewARR_X/2 to have duty cycle equal to 50% */
__HAL_TIM_SET_COMPARE(&htim4, TIM_CHANNEL_1, NewARR_X/2);
/* Time base configuration */
__HAL_TIM_SET_AUTORELOAD(&htim4, NewARR_X);
/* Enable TIM4 Capture Compare Channel1 */
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_1);
}
else if (X_Offset > ThreadholdAcceleroHigh)
{
/* Sets the TIM4 Capture Compare for Channel3 Register value */
/* Equal to NewARR_X/2 to have duty cycle equal to 50% */
__HAL_TIM_SET_COMPARE(&htim4, TIM_CHANNEL_3, NewARR_X/2);
/* Time base configuration */
__HAL_TIM_SET_AUTORELOAD(&htim4, NewARR_X);
/* Enable TIM4 Capture Compare Channel3 */
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_3);
}
if (Y_Offset > ThreadholdAcceleroHigh)
{
/* Sets the TIM4 Capture Compare for Channel2 Register value */
/* Equal to NewARR_Y/2 to have duty cycle equal to 50% */
__HAL_TIM_SET_COMPARE(&htim4, TIM_CHANNEL_2,NewARR_Y/2);
/* Time base configuration */
__HAL_TIM_SET_AUTORELOAD(&htim4, NewARR_Y);
/* Enable TIM4 Capture Compare Channel2 */
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_2);
}
else if (Y_Offset < ThreadholdAcceleroLow)
{
/* Sets the TIM4 Capture Compare for Channel4 Register value */
/* Equal to NewARR_Y/2 to have duty cycle equal to 50% */
__HAL_TIM_SET_COMPARE(&htim4, TIM_CHANNEL_4, NewARR_Y/2);
/* Time base configuration */
__HAL_TIM_SET_AUTORELOAD(&htim4, NewARR_Y);
/* Enable TIM4 Capture Compare Channel4 */
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_4);
}
}
Counter = 0x00;
}
}
}
/**
* @brief Configures IOs to control the two motors and one pump
* @param None
* @retval None
*/
void MOTOR_Init(void) {
GPIO_InitTypeDef GPIO_InitStruct;
// Enable all timers
PUMP_PWM_TIMER_CLK_ENABLE();
MOTOR_PWM_TIMER_CLK_ENABLE();
MOTOR_HALL_ENC1_TIMER_CLK_ENABLE();
MOTOR_HALL_ENC2_TIMER_CLK_ENABLE();
MOTOR_HALL_SPEED_TIMER_CLK_ENABLE();
// Enable the clock for all IO pins
MOTOR_PWM_CLK_ENABLE();
MOTOR_CURR_CLK_ENABLE();
MOTOR_HALL_M1_ENC_CLK_ENABLE();
MOTOR_HALL_M2_ENC_CLK_ENABLE();
MOTOR_HALL_SPEED_CLK_ENABLE();
// Motor driver --------------------------------------------------------
// Configure the 4 motor pins of motor 1 and 2 as normal IO
GPIO_InitStruct.Pin = MOTOR_M2_IN1_PIN | MOTOR_M2_IN2_PIN
| MOTOR_M1_IN1_PIN| MOTOR_M1_IN2_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = MOTOR_PWM_TIMER_AF;
HAL_GPIO_Init(MOTOR_PWM_PORT, &GPIO_InitStruct);
// Configure the 2 motor pins of motor 3 as PWM output
GPIO_InitStruct.Pin = MOTOR_M3_IN1_PIN | MOTOR_M3_IN2_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = PUMP_PWM_TIMER_AF;
HAL_GPIO_Init(MOTOR_PWM_PORT, &GPIO_InitStruct);
// Configure the 10 motor current pins
GPIO_InitStruct.Pin = MOTOR_M2_I0_PIN | MOTOR_M2_I1_PIN | MOTOR_M2_I2_PIN
| MOTOR_M2_I3_PIN | MOTOR_M2_I4_PIN
| MOTOR_M1_I0_PIN | MOTOR_M1_I1_PIN | MOTOR_M1_I2_PIN
| MOTOR_M1_I3_PIN | MOTOR_M1_I4_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
HAL_GPIO_Init(MOTOR_CURR_PORT, &GPIO_InitStruct);
// Timer configuration for motor pwm
htimMotor.Instance = MOTOR_PWM_TIMER;
htimMotor.Init.Period = MOTOR_MAX - 1; // = 20kHz = 84MHz / 1 / 4200
htimMotor.Init.Prescaler = 1-1;
htimMotor.Init.ClockDivision = 1;
htimMotor.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&htimMotor);
// Timer configuration for pump
htimPump.Instance = PUMP_PWM_TIMER;
htimPump.Init.Period = MOTOR_MAX - 1; // = 20kHz = 168MHz / 2 / 4200
htimPump.Init.Prescaler = 2-1;
htimPump.Init.ClockDivision = 1;
htimPump.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&htimPump);
// Configure Timer 1 channel 1 and 2 as PWM output
sConfigTimMotor.OCMode = TIM_OCMODE_PWM1;
sConfigTimMotor.Pulse = 0;
sConfigTimMotor.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigTimMotor.OCFastMode = TIM_OCFAST_ENABLE;
sConfigTimMotor.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfigTimMotor.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigTimMotor.OCNIdleState= TIM_OCNIDLESTATE_SET;
// Configure Timer 1 channel 1 as PWM output
sConfigTimPump.OCMode = TIM_OCMODE_PWM1;
sConfigTimPump.Pulse = 0;
sConfigTimPump.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigTimPump.OCFastMode = TIM_OCFAST_ENABLE;
sConfigTimPump.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfigTimPump.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigTimPump.OCNIdleState= TIM_OCNIDLESTATE_SET;
// PWM Mode
HAL_TIM_PWM_ConfigChannel(&htimMotor, &sConfigTimMotor, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htimMotor, &sConfigTimMotor, TIM_CHANNEL_2);
HAL_TIM_PWM_ConfigChannel(&htimMotor, &sConfigTimMotor, TIM_CHANNEL_3);
HAL_TIM_PWM_ConfigChannel(&htimMotor, &sConfigTimMotor, TIM_CHANNEL_4);
HAL_TIM_PWM_ConfigChannel(&htimPump, &sConfigTimPump, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htimPump, &sConfigTimPump, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htimMotor, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htimMotor, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htimMotor, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htimMotor, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&htimPump, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htimPump, TIM_CHANNEL_2);
MOTOR_SetVal(MOTOR_M1, 0, 0);
MOTOR_SetVal(MOTOR_M2, 0 , 0);
MOTOR_SetVal(MOTOR_PUMP, 0, 0);
// Encoder ----------------------------------------------------------
// Configure the hall encoder pins
GPIO_InitStruct.Pin = MOTOR_HALL_M1A_ENC_PIN | MOTOR_HALL_M1B_ENC_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = MOTOR_HALL_ENC1_TIMER_AF;
HAL_GPIO_Init(MOTOR_HALL_M1_ENC_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = MOTOR_HALL_M2A_ENC_PIN | MOTOR_HALL_M2B_ENC_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = MOTOR_HALL_ENC2_TIMER_AF;
HAL_GPIO_Init(MOTOR_HALL_M2_ENC_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = MOTOR_HALL_M1A_SPEED_PIN | MOTOR_HALL_M1B_SPEED_PIN
| MOTOR_HALL_M2A_SPEED_PIN | MOTOR_HALL_M2B_SPEED_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = MOTOR_HALL_SPEED_TIMER_AF;
HAL_GPIO_Init(MOTOR_HALL_SPEED_PORT, &GPIO_InitStruct);
// Timer configuration for hall encoder M1
htimEncM1.Instance = MOTOR_HALL_ENC1_TIMER;
htimEncM1.Init.Period = 0xFFFF;
htimEncM1.Init.Prescaler = 0;
htimEncM1.Init.ClockDivision = 0;
htimEncM1.Init.CounterMode = TIM_COUNTERMODE_UP;
sConfigEncM.EncoderMode = TIM_ENCODERMODE_TI2;
sConfigEncM.IC1Filter = 0;
sConfigEncM.IC1Polarity = TIM_ICPOLARITY_RISING;
sConfigEncM.IC1Prescaler = TIM_ICPSC_DIV1;
sConfigEncM.IC1Selection = TIM_ICSELECTION_DIRECTTI;
sConfigEncM.IC2Filter = 0;
sConfigEncM.IC2Polarity = TIM_ICPOLARITY_RISING;
sConfigEncM.IC2Prescaler = TIM_ICPSC_DIV1;
sConfigEncM.IC2Selection = TIM_ICSELECTION_DIRECTTI;
// Encoder Mode
HAL_TIM_Encoder_Init(&htimEncM1, &sConfigEncM);
HAL_TIM_Encoder_Start(&htimEncM1, TIM_CHANNEL_1);
HAL_TIM_Encoder_Start(&htimEncM1, TIM_CHANNEL_2);
// Timer configuration for hall encoder M2
htimEncM2.Instance = MOTOR_HALL_ENC2_TIMER;
htimEncM2.Init.Period = 0xFFFF;
htimEncM2.Init.Prescaler = 0;
htimEncM2.Init.ClockDivision = 0;
htimEncM2.Init.CounterMode = TIM_COUNTERMODE_UP;
// Encoder mode
HAL_TIM_Encoder_Init(&htimEncM2, &sConfigEncM);
HAL_TIM_Encoder_Start(&htimEncM2, TIM_CHANNEL_1);
HAL_TIM_Encoder_Start(&htimEncM2, TIM_CHANNEL_2);
#ifdef MOTOR_MEASURE_SPEED
// Timer configuration for input capture
htimEncSpeed.Instance = MOTOR_HALL_SPEED_TIMER;
htimEncSpeed.Init.Period = 0xFFFF;
htimEncSpeed.Init.Prescaler = 84-1; // 10us
htimEncSpeed.Init.ClockDivision = 0;
htimEncSpeed.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_IC_Init(&htimEncSpeed);
sConfigEncSpeed.ICFilter = 0;
sConfigEncSpeed.ICPolarity = TIM_ICPOLARITY_RISING;
sConfigEncSpeed.ICPrescaler = TIM_ICPSC_DIV1;
sConfigEncSpeed.ICSelection = TIM_ICSELECTION_DIRECTTI;
// Configure the NVIC
HAL_NVIC_SetPriority(TIM_HALL_SPEED_IRQn, 0, 1);
/* Enable the TIM8 global Interrupt */
HAL_NVIC_EnableIRQ(TIM_HALL_SPEED_IRQn);
// Input capture mode
HAL_TIM_IC_ConfigChannel(&htimEncSpeed, &sConfigEncSpeed, TIM_CHANNEL_1);
HAL_TIM_IC_ConfigChannel(&htimEncSpeed, &sConfigEncSpeed, TIM_CHANNEL_2);
HAL_TIM_IC_ConfigChannel(&htimEncSpeed, &sConfigEncSpeed, TIM_CHANNEL_3);
HAL_TIM_IC_ConfigChannel(&htimEncSpeed, &sConfigEncSpeed, TIM_CHANNEL_4);
HAL_TIM_IC_Start_IT(&htimEncSpeed, TIM_CHANNEL_1);
HAL_TIM_IC_Start_IT(&htimEncSpeed, TIM_CHANNEL_2);
HAL_TIM_IC_Start_IT(&htimEncSpeed, TIM_CHANNEL_3);
HAL_TIM_IC_Start_IT(&htimEncSpeed, TIM_CHANNEL_4);
#endif //MOTOR_MEASURE_SPEED
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 168 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the prescaler value to have TIM1 counter clock equal to 18 MHz */
uwPrescalerValue = (uint32_t) ((SystemCoreClock / 18000000) - 1);
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
1/ Generate 3 complementary PWM signals with 3 different duty cycles:
TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2), since APB2
prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK2 = HCLK / 2
=> TIM1CLK = 2 * (HCLK / 2) = HCLK = SystemCoreClock
TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is set to have
TIM1 counter clock = 18MHz..
The objective is to generate PWM signal at 10 KHz:
- TIM1_Period = (SystemCoreClock / 10000) - 1
The Three Duty cycles are computed as the following description:
The channel 1 duty cycle is set to 50% so channel 1N is set to 50%.
The channel 2 duty cycle is set to 25% so channel 2N is set to 75%.
The channel 3 duty cycle is set to 12.5% so channel 3N is set to 87.5%.
The Timer pulse is calculated as follows:
- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
2/ Insert a dead time equal to (11/SystemCoreClock) ns
3/ Configure the break feature, active at High level, and using the automatic
output enable feature
4/ Use the Locking parameters level1.
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Initialize TIM peripheral as follow:
+ Prescaler = (SystemCoreClock/18000000) - 1
+ Period = 1799 (to have an output frequency equal to 10 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
/* Select the Timer instance */
TimHandle.Instance = TIM1;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sPWMConfig.OCMode = TIM_OCMODE_PWM1;
sPWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sPWMConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sPWMConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sPWMConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sPWMConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the Break feature & Dead time */
sBreakConfig.BreakState = TIM_BREAK_ENABLE;
sBreakConfig.DeadTime = 11;
sBreakConfig.OffStateRunMode = TIM_OSSR_ENABLE;
sBreakConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
sBreakConfig.LockLevel = TIM_LOCKLEVEL_1;
sBreakConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_ENABLE;
if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle, &sBreakConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
void pwmout_write(pwmout_t* obj, float value) {
TIM_OC_InitTypeDef sConfig;
int channel = 0;
int complementary_channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->pin) {
// Channels 1
case PA_0:
case PA_5:
case PA_6:
case PA_8:
case PA_15:
case PB_4:
case PB_6:
case PC_6:
channel = TIM_CHANNEL_1;
break;
// Channels 1N
case PA_7:
case PB_13:
channel = TIM_CHANNEL_1;
complementary_channel = 1;
break;
// Channels 2
case PA_1:
case PA_9:
case PB_3:
case PB_5:
case PB_7:
case PC_7:
channel = TIM_CHANNEL_2;
break;
// Channels 2N
case PB_0:
case PB_14:
channel = TIM_CHANNEL_2;
complementary_channel = 1;
break;
// Channels 3
case PA_2:
case PA_10:
case PB_8:
case PB_10:
case PC_8:
channel = TIM_CHANNEL_3;
break;
// Channels 3N
case PB_1:
case PB_15:
channel = TIM_CHANNEL_3;
complementary_channel = 1;
break;
// Channels 4
case PA_3:
case PA_11:
case PB_9:
case PC_9:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
if (complementary_channel) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F2xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 120 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the prescaler value to have TIM3 counter clock equal to 15 MHz */
uhPrescalerValue = (uint32_t)((SystemCoreClock / 2) / 15000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* -----------------------------------------------------------------------
TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles.
In this example TIM3 input clock (TIM3CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM3CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM3CLK = HCLK / 2 = SystemCoreClock /2
To get TIM3 counter clock at 15 MHz, the prescaler is computed as follows:
Prescaler = (TIM3CLK / TIM3 counter clock) - 1
Prescaler = ((SystemCoreClock /2) /15 MHz) - 1
To get TIM3 output clock at 31.530 KHz, the period (ARR)) is computed as follows:
ARR = (TIM3 counter clock / TIM3 output clock) - 1
= 665
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR + 1)* 100 = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR + 1)* 100 = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR + 1)* 100 = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR + 1)* 100 = 12.5%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in SystemClock_Config().
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
----------------------------------------------------------------------- */
/* Initialize TIMx peripheral as follow:
+ Prescaler = (SystemCoreClock/2)/21000000
+ Period = 665
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIMx;
TimHandle.Init.Prescaler = uhPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = PULSE4_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
while (1)
{
}
}
void MX_TIM_Init(void) {
__HAL_RCC_TIM1_CLK_ENABLE();
__HAL_RCC_TIM8_CLK_ENABLE();
TIM_MasterConfigTypeDef sMasterConfig;
TIM_OC_InitTypeDef sConfigOC;
TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;
TIM_SlaveConfigTypeDef sTimConfig;
htim_right.Instance = RIGHT_TIM;
htim_right.Init.Prescaler = 0;
htim_right.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
htim_right.Init.Period = 64000000 / 2 / PWM_FREQ;
htim_right.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim_right.Init.RepetitionCounter = 0;
htim_right.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
HAL_TIM_PWM_Init(&htim_right);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim_right, &sMasterConfig);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCNPolarity = TIM_OCNPOLARITY_LOW;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_SET;
HAL_TIM_PWM_ConfigChannel(&htim_right, &sConfigOC, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htim_right, &sConfigOC, TIM_CHANNEL_2);
HAL_TIM_PWM_ConfigChannel(&htim_right, &sConfigOC, TIM_CHANNEL_3);
sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_ENABLE;
sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
sBreakDeadTimeConfig.DeadTime = DEAD_TIME;
sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_LOW;
sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
HAL_TIMEx_ConfigBreakDeadTime(&htim_right, &sBreakDeadTimeConfig);
htim_left.Instance = LEFT_TIM;
htim_left.Init.Prescaler = 0;
htim_left.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
htim_left.Init.Period = 64000000 / 2 / PWM_FREQ;
htim_left.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim_left.Init.RepetitionCounter = 0;
htim_left.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
HAL_TIM_PWM_Init(&htim_left);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim_left, &sMasterConfig);
sTimConfig.InputTrigger = TIM_TS_ITR0;
sTimConfig.SlaveMode = TIM_SLAVEMODE_GATED;
HAL_TIM_SlaveConfigSynchronization(&htim_left, &sTimConfig);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCNPolarity = TIM_OCNPOLARITY_LOW;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_SET;
HAL_TIM_PWM_ConfigChannel(&htim_left, &sConfigOC, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htim_left, &sConfigOC, TIM_CHANNEL_2);
HAL_TIM_PWM_ConfigChannel(&htim_left, &sConfigOC, TIM_CHANNEL_3);
sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_ENABLE;
sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
sBreakDeadTimeConfig.DeadTime = DEAD_TIME;
sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_LOW;
sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
HAL_TIMEx_ConfigBreakDeadTime(&htim_left, &sBreakDeadTimeConfig);
LEFT_TIM->BDTR &= ~TIM_BDTR_MOE;
RIGHT_TIM->BDTR &= ~TIM_BDTR_MOE;
HAL_TIM_PWM_Start(&htim_left, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim_left, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim_left, TIM_CHANNEL_3);
HAL_TIMEx_PWMN_Start(&htim_left, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim_left, TIM_CHANNEL_2);
HAL_TIMEx_PWMN_Start(&htim_left, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htim_right, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim_right, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim_right, TIM_CHANNEL_3);
HAL_TIMEx_PWMN_Start(&htim_right, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim_right, TIM_CHANNEL_2);
HAL_TIMEx_PWMN_Start(&htim_right, TIM_CHANNEL_3);
htim_left.Instance->RCR = 1;
__HAL_TIM_ENABLE(&htim_right);
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##-1- Configure the TIM peripheral #######################################*/
/* -----------------------------------------------------------------------
TIM1 Configuration: generate 1 PWM signal using the DMA burst mode:
TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2),
since APB2 prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK2 = HCLK / 2
=> TIM1CLK = 2 * (HCLK / 2) = HCLK = SystemCoreClock
To get TIM1 counter clock at 20 MHz, the prescaler is computed as follows:
Prescaler = (TIM1CLK / TIM1 counter clock) - 1
Prescaler = (SystemCoreClock /20 MHz) - 1
The TIM1 Frequency = TIM1 counter clock/(ARR + 1)
= 20 MHz / 4096 = 4.88 KHz
TIM1 Channel1 duty cycle = (TIM1_CCR1/ TIM1_ARR)* 100 = 33.33%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
----------------------------------------------------------------------- */
TimHandle.Instance = TIMx;
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.RepetitionCounter = 0;
TimHandle.Init.Prescaler = (uint16_t) ((SystemCoreClock / 20000000) - 1);
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channel 3 ########################################*/
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.Pulse = 0xFFF;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signal generation in DMA mode ############################*/
if( HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting PWM generation Error */
Error_Handler();
}
/*##-4- Start DMA Burst transfer ###########################################*/
HAL_TIM_DMABurst_WriteStart(&TimHandle, TIM_DMABASE_ARR, TIM_DMA_UPDATE,
(uint32_t*)aSRC_Buffer, TIM_DMABURSTLENGTH_3TRANSFERS);
/* Infinite loop */
while (1)
{
}
}
Status_t xMotorStart(TIM_HandleTypeDef* pxTIMHandle, MotorChannel_t xChannel)
{
/*##- Start PWM signals generation #######################################*/
switch(xChannel)
{
case MOTOR_CHANNEL_1:
/* Start channel 1 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
break;
case MOTOR_CHANNEL_2:
/* Start channel 2 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
break;
case MOTOR_CHANNEL_3:
/* Start channel 3 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
break;
case MOTOR_CHANNEL_4:
/* Start channel 4 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
break;
case MOTOR_CHANNEL_ALL:
/* Start channel 1 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(pxTIMHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM Generation Error */
return STATUS_ERROR;
}
break;
default:
return STATUS_ERROR;
}
/* Return OK */
return STATUS_OK;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* This sample code shows how to use STM32L0xx TIM HAL API to generate 4 PWM
signals */
/* STM32L0xx HAL library initialization:
- Configure the Flash prefetch, Flash preread and Buffer caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Compute the prescaler value to have TIM2 counter clock equal to 16 MHz */
uwPrescalerValue = (SystemCoreClock / 16000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* Initialize TIMx peripheral as follow:
+ Prescaler = (SystemCoreClock)/16000000
+ Period = 1600 (to have an output frequency equal to 10 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIM2;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
ErrorHandler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = PULSE4_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
while (1)
{
}
}
void BSP_Init(void) {
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__PWR_CLK_ENABLE()
;
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
__GPIOB_CLK_ENABLE()
;
GPIO_InitTypeDef GPIO_Init;
GPIO_Init.Mode = GPIO_MODE_AF_PP;
GPIO_Init.Pull = GPIO_NOPULL;
GPIO_Init.Speed = GPIO_SPEED_FAST;
GPIO_Init.Alternate = GPIO_AF2_TIM3;
GPIO_Init.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4;
HAL_GPIO_Init(LEDS_PORT, &GPIO_Init);
__TIM3_CLK_ENABLE()
;
TIM_MasterConfigTypeDef TIM_MasterConfig;
TIM_OC_InitTypeDef TIM_OC_Init;
TIM3_Handle.Instance = TIM3;
TIM3_Handle.Init.Prescaler = 84 - 1;
TIM3_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TIM3_Handle.Init.Period = 1500;
TIM3_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2;
HAL_TIM_PWM_Init(&TIM3_Handle);
TIM_MasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
TIM_MasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&TIM3_Handle, &TIM_MasterConfig);
TIM_OC_Init.OCMode = TIM_OCMODE_PWM2;
TIM_OC_Init.Pulse = 0;
TIM_OC_Init.OCPolarity = TIM_OCPOLARITY_HIGH;
TIM_OC_Init.OCFastMode = TIM_OCFAST_ENABLE;
HAL_TIM_PWM_ConfigChannel(&TIM3_Handle, &TIM_OC_Init, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&TIM3_Handle, &TIM_OC_Init, TIM_CHANNEL_3);
HAL_TIM_PWM_ConfigChannel(&TIM3_Handle, &TIM_OC_Init, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&TIM3_Handle, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&TIM3_Handle, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&TIM3_Handle, TIM_CHANNEL_4);
BSP_ADC_Init();
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
uint16_t TimerPeriod = 0;
uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel5Pulse = 0;
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Configure the system clock to have a system clock = 72 Mhz */
SystemClock_Config();
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
Generate 3 combined PWM signals:
TIM1 input clock (TIM1CLK) is set to APB2 clock (PCLK2)
=> TIM1CLK = PCLK2 = SystemCoreClock
TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
SystemCoreClock is set to 72 MHz for STM32F30x devices
The objective is to generate 3 combined PWM signal at 8.78 KHz (in center aligned mode):
- TIM1_Period = (SystemCoreClock / (8.78*2)) - 1
The channel 1 duty cycle is set to 50%
The channel 2 duty cycle is set to 37.5%
The channel 3 duty cycle is set to 25%
The Timer pulse is calculated as follows:
- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
The channel 5 is used in PWM2 mode with duty cycle set to 6.22%
The 3 resulting signals are made of an AND logical combination of two reference PWMs:
- Channel 1 and Channel 5
- Channel 2 and Channel 5
- Channel 3 and Channel 5
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f3xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Compute the value to be set in ARR regiter to generate signal frequency at 8.78 Khz */
TimerPeriod = (SystemCoreClock / 17570 ) - 1;
/* Compute CCR1 value to generate a duty cycle at 50% for channel 1 */
Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
/* Compute CCR2 value to generate a duty cycle at 37.5% for channel 2 */
Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
/* Compute CCR3 value to generate a duty cycle at 25% for channel 3 */
Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
/* Compute CCR5 value to generate a duty cycle at 6.22% for channel 5 (in PWM2)*/
Channel5Pulse = (uint16_t) (((uint32_t) 622 * (TimerPeriod - 1)) / 10000);
/* Initialize Timer TIM1 */
TimHandle.Instance = TIM1;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.Period = TimerPeriod;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Channels 1 configuration on TIM1 */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = Channel1Pulse;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Channels 2 configuration on TIM1 */
sConfig.Pulse = Channel2Pulse;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Channels 3 configuration on TIM1 */
sConfig.Pulse = Channel3Pulse;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Channels 5 configuration on TIM1 */
sConfig.OCMode = TIM_OCMODE_PWM2;
sConfig.Pulse = Channel5Pulse;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_5) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Group channel 5 and channels 1, 2 and 3 ############################*/
if(HAL_TIMEx_GroupChannel5(&TimHandle, (TIM_GROUPCH5_OC1REFC |\
TIM_GROUPCH5_OC2REFC |\
TIM_GROUPCH5_OC3REFC)) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-4- Start PWM signals generation #######################################*/
/* Start TIM1 channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start TIM1 channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start TIM1 channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start TIM1 channel 5 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_5) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
while (1)
{
}
}
/**********************************************************
* @brief Motors_init : motor initialisation
* @param
* @retval None
**********************************************************/
void Motors_init(void)
{
GPIO_InitTypeDef GPIO_DIR_InitStruct;
GPIO_InitTypeDef GPIO_PWM_InitStruct;
/* GPIO Ports Clock Enable */
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
/* GPIOD Configuration: Direction */
GPIO_DIR_InitStruct.Pin = HBRIDGE_DIR1_PIN | HBRIDGE_DIR2_PIN; // Pin direction
GPIO_DIR_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_DIR_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOD, &GPIO_DIR_InitStruct);
/* GPIOE Configuration: sleep pin */
GPIO_DIR_InitStruct.Pin = HBRIDGE_SLEEP_PIN; // Pin direction
GPIO_DIR_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;// Alternative function
HAL_GPIO_Init(HBRIDGE_SLEEP_PORT, &GPIO_DIR_InitStruct);
/* GPIOC PWM Configuration: TIM3 CH3 (PC8) and TIM3 CH4 (PC9) */
GPIO_PWM_InitStruct.Pin = HBRIDGE_PWM1_PIN | HBRIDGE_PWM2_PIN ;
GPIO_PWM_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_PWM_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_PWM_InitStruct.Alternate = GPIO_AF2_TIM3;
HAL_GPIO_Init(GPIOC, &GPIO_PWM_InitStruct);
/* TIM3 Clock Enable */
__TIM3_CLK_ENABLE();
/* TIM3 is connected to APB1 bus : so 42MHz clock. But PLL double this frequency => 42*2 = 84 Mhz */
/* Timer_Frequency = (84Mhz) / (Prescaler +1 ) */
/* TIMER_Period = (Timer_Frequency) / (PWM_frequency) - 1 */
// Init TIMER3 for 20 Khz frequency (PWM motors)
TIMER_InitStruct.Instance = TIM3;
TIMER_InitStruct.Init.Prescaler = 0; // Timer_Frequency = 84 Mhz.
TIMER_InitStruct.Init.CounterMode = TIM_COUNTERMODE_UP;
TIMER_InitStruct.Init.Period = 4199; // TIMER_Period = (84M)/(20k) - 1 = 4199
TIMER_InitStruct.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&TIMER_InitStruct);
// Output Compare Configuration
TIMER_OC_InitStruct.OCMode = TIM_OCMODE_PWM1;
TIMER_OC_InitStruct.OCIdleState = TIM_OCIDLESTATE_SET;
TIMER_OC_InitStruct.Pulse = 0;// PWM 0 %
TIMER_OC_InitStruct.OCPolarity = TIM_OCPOLARITY_HIGH;
TIMER_OC_InitStruct.OCFastMode = TIM_OCFAST_ENABLE;
HAL_TIM_PWM_ConfigChannel(&TIMER_InitStruct, &TIMER_OC_InitStruct, TIM_CHANNEL_3);
HAL_TIM_PWM_ConfigChannel(&TIMER_InitStruct, &TIMER_OC_InitStruct, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&TIMER_InitStruct,TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&TIMER_InitStruct,TIM_CHANNEL_4);
// Enable nsleep
HBRIDGE_SLEEP_PORT->BSRRL = HBRIDGE_SLEEP_PIN;
s_motorRight.speed = 0;
s_motorLeft.speed = 0;
s_motorRight.direction = MOTOR_FORWARD;
s_motorLeft.direction = MOTOR_FORWARD;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 168 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the Timer period to generate a signal frequency at 17.57 Khz */
uwPeriod = (SystemCoreClock / 17570 ) - 1;
/* Compute Pulse1 value to generate a duty cycle at 50% for channel 1 and 1N */
uwPulse1 = (5 * (uwPeriod - 1)) / 10;
/* Compute Pulse2 value to generate a duty cycle at 37.5% for channel 2 and 2N */
uwPulse2 = (375 * (uwPeriod - 1)) / 1000;
/* Compute Pulse3 value to generate a duty cycle at 25% for channel 3 and 3N */
uwPulse3 = (25 * (uwPeriod - 1)) / 100;
/* Compute Pulse4 value to generate a duty cycle at 12.5% for channel 4 */
uwPulse4 = (125 * (uwPeriod- 1)) / 1000;
/*##-1- Configure the TIM peripheral #######################################*/
/*----------------------------------------------------------------------------
Generate 7 PWM signals with 4 different duty cycles:
TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2), since APB2
prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK2 = HCLK / 2
=> TIM1CLK = 2 * (HCLK / 2) = HCLK = SystemCoreClock
TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
SystemCoreClock is set to 168 MHz for STM32F4xx devices
The objective is to generate 7 PWM signal at 17.57 KHz:
- TIM1_Period = (SystemCoreClock / 17570) - 1
The channel 1 and channel 1N duty cycle is set to 50%
The channel 2 and channel 2N duty cycle is set to 37.5%
The channel 3 and channel 3N duty cycle is set to 25%
The channel 4 duty cycle is set to 12.5%
The Timer pulse is calculated as follows:
- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate()
function to update SystemCoreClock variable value. Otherwise, any configuration
based on this variable will be incorrect.
----------------------------------------------------------------------- */
/* Initialize TIMx peripheral as follow:
+ Prescaler = 0
+ Period = uwPeriod (to have an output frequency equal to 17.57 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIM1;
TimHandle.Init.Period = uwPeriod;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM2;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCPolarity = TIM_OCPOLARITY_LOW;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sConfig.Pulse = uwPulse1;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = uwPulse2;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = uwPulse3;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = uwPulse4;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to have a system clock = 168 Mhz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Timers Configuration */
/* ---------------------------------------------------------------------------
Timers synchronisation in parallel mode
1/TIM2 is configured as Master Timer:
- PWM Mode is used
- The TIM2 Update event is used as Trigger Output
2/TIM3 and TIM4 are slaves for TIM2,
- PWM Mode is used
- The ITR1(TIM2) is used as input trigger for both slaves
- Gated mode is used, so starts and stops of slaves counters
are controlled by the Master trigger output signal(update event).
TIM2 input clock (TIM2CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM2CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM2CLK = HCLK / 2 = SystemCoreClock /2
To get Master Timer TIM2 output clock at 351.562 KHz running at and the
duty cycle is equal to 25% :
The period (TIM2_ARR) is computed as follows:
ARR = (TIM2 counter clock / TIM2 output clock) - 1
= 255
The dutu cycle (TIM2_CCR1) is computed as follows:
CCR1 = ((TIM2_ARR + 1) * 25)/100
= 64
The TIM3 is running:
- At (TIM2 frequency)/ (TIM3 period + 1) = 35.156 KHz and a duty cycle
equal to TIM3_CCR1/(TIM3_ARR + 1) = 30%
The TIM4 is running:
- At (TIM2 frequency)/ (TIM4 period + 1) = 70.312 KHz and a duty cycle
equal to TIM4_CCR1/(TIM4_ARR + 1) = 60%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
----------------------------------------------------------------------------*/
/* Set Timers instance */
TimMasterHandle.Instance = TIM2;
TimSlave1Handle.Instance = TIM3;
TimSlave2Handle.Instance = TIM4;
/*====================== Master configuration : TIM2 =======================*/
/* Initialize TIM2 peripheral in PWM mode*/
TimMasterHandle.Init.Period = 255;
TimMasterHandle.Init.Prescaler = 0;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 4;
if(HAL_TIM_PWM_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 64;
if(HAL_TIM_PWM_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM2 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle,&sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Master configuration : TIM2 ====================*/
/*====================== Slave1 configuration : TIM3 =======================*/
/* Initialize TIM3 peripheral in PWM mode*/
TimSlave1Handle.Init.Period = 9;
TimSlave1Handle.Init.Prescaler = 0;
TimSlave1Handle.Init.ClockDivision = 0;
TimSlave1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave1Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave1Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 3;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave1Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR1;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave1Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave1 configuration : TIM3 ====================*/
/*====================== Slave2 configuration : TIM4 =======================*/
/* Initialize TIM4 peripheral in PWM mode*/
TimSlave2Handle.Init.Period = 4;
TimSlave2Handle.Init.Prescaler = 0;
TimSlave2Handle.Init.ClockDivision = 0;
TimSlave2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave2Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave2Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 3;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave2Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR1;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave2Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave2 configuration : TIM4 ====================*/
/* Start Master PWM generation */
if(HAL_TIM_PWM_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave1 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave1Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave2 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave2Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the period value to have TIM1 counter clock equal to 18kHz */
uwPeriodValue = (uint32_t) ((SystemCoreClock / 18000) - 1);
/* Compute Pulse1 value to generate a duty cycle at 50% for channel 1 and 1N */
uwPulse1 = (5 * (uwPeriodValue - 1)) / 10;
/* Compute Pulse2 value to generate a duty cycle at 37.5% for channel 2 and 2N */
uwPulse2 = (375 * (uwPeriodValue - 1)) / 1000;
/* Compute Pulse3 value to generate a duty cycle at 25% for channel 3 and 3N */
uwPulse3 = (25 * (uwPeriodValue - 1)) / 100;
/* Compute Pulse4 value to generate a duty cycle at 12.5% for channel 4 */
uwPulse4 = (125 * (uwPeriodValue- 1)) / 1000;
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
Generate 7 PWM signals with 4 different duty cycles (50%, 37.5%, 25% and 12.5%)
TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2), since APB2
prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK1 = HCLK / 2
=> TIM1CLK = HCLK = SystemCoreClock
TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is set to have
TIM1 counter clock = 18kHz.
The objective is to generate 7 PWM signal at 18kHz:
- TIM1_Period = (SystemCoreClock / 18000) - 1
The channel 1 and channel 1N duty cycle is set to 50%
The channel 2 and channel 2N duty cycle is set to 37.5%
The channel 3 and channel 3N duty cycle is set to 25%
The channel 4 duty cycle is set to 12.5%
The Timer pulse is calculated as follows:
- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Initialize TIM peripheral as follows:
+ Prescaler = 0
+ Period = uwPeriodValue (to have an output frequency equal to 18kHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
/* Select the Timer instance */
TimHandle.Instance = TIM1;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.Period = uwPeriodValue;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sPWMConfig.OCMode = TIM_OCMODE_PWM2;
sPWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
sPWMConfig.OCPolarity = TIM_OCPOLARITY_LOW;
sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sPWMConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sPWMConfig.Pulse = uwPulse1;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sPWMConfig.Pulse = uwPulse2;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sPWMConfig.Pulse = uwPulse3;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sPWMConfig.Pulse = uwPulse4;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the Timer period to generate a signal frequency at 17.57 Khz */
uwPeriod = (SystemCoreClock / 17570 ) - 1;
/* Compute Pulse1 value to generate a duty cycle at 50% for channel 1 and 1N */
uwPulse1 = (5 * (uwPeriod - 1)) / 10;
/* Compute Pulse2 value to generate a duty cycle at 37.5% for channel 2 and 2N */
uwPulse2 = (375 * (uwPeriod - 1)) / 1000;
/* Compute Pulse3 value to generate a duty cycle at 25% for channel 3 and 3N */
uwPulse3 = (25 * (uwPeriod - 1)) / 100;
/* Compute Pulse4 value to generate a duty cycle at 12.5% for channel 4 */
uwPulse4 = (125 * (uwPeriod- 1)) / 1000;
/*##-1- Configure the TIM peripheral #######################################*/
/* Initialize TIMx peripheral as follow:
+ Prescaler = 0
+ Period = uwPeriod (to have an output frequency equal to 17.57 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIM1;
TimHandle.Init.Period = uwPeriod;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM2;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCPolarity = TIM_OCPOLARITY_LOW;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sConfig.Pulse = uwPulse1;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = uwPulse2;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = uwPulse3;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = uwPulse4;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Set Timers instance */
TimMasterHandle.Instance = TIM1;
TimSlave1Handle.Instance = TIM3;
TimSlave2Handle.Instance = TIM4;
/*====================== Master configuration : TIM1 =======================*/
/* Initialize TIM1 peripheral in PWM mode*/
TimMasterHandle.Init.Period = 255;
TimMasterHandle.Init.Prescaler = 0;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 4;
if(HAL_TIM_PWM_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 127;
if(HAL_TIM_PWM_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle,&sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Master configuration : TIM1 ====================*/
/*====================== Slave1 configuration : TIM3 =======================*/
/* Initialize TIM3 peripheral in PWM mode*/
TimSlave1Handle.Init.Period = 2;
TimSlave1Handle.Init.Prescaler = 0;
TimSlave1Handle.Init.ClockDivision = 0;
TimSlave1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave1Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave1Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave1Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave1Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave1 configuration : TIM3 ====================*/
/*====================== Slave2 configuration : TIM4 =======================*/
/* Initialize TIM4 peripheral in PWM mode*/
TimSlave2Handle.Init.Period = 1;
TimSlave2Handle.Init.Prescaler = 0;
TimSlave2Handle.Init.ClockDivision = 0;
TimSlave2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave2Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave2Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave2Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave2Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave2 configuration : TIM4 ====================*/
/* Start Master PWM generation */
if(HAL_TIM_PWM_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave1 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave1Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave2 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave2Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F2xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 120 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Timers Configuration */
/* ---------------------------------------------------------------------------
TIM1 and Timers(TIM3 and TIM4) synchronisation in parallel mode.
1/TIM1 is configured as Master Timer:
- PWM Mode is used
- The TIM1 Update event is used as Trigger Output
2/TIM3 and TIM4 are slaves for TIM1,
- PWM Mode is used
- The ITR0(TIM1) is used as input trigger for both slaves
- Gated mode is used, so starts and stops of slaves counters
are controlled by the Master trigger output signal(update event).
In this example TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2),
since APB2 prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK2 = HCLK / 2
=> TIM1CLK = HCLK = SystemCoreClock
The TIM1 counter clock is equal to SystemCoreClock = 120 MHz.
The Master Timer TIM1 is running at:
TIM1 frequency = TIM1 counter clock / (TIM1_Period + 1) = 469 KHz
TIM1_Period = (TIM1 counter clock / TIM1 frequency) - 1 = 255
and the duty cycle is equal to: TIM1_CCR1/(TIM1_ARR + 1) = 50%
The TIM3 is running at:
(TIM1 frequency)/ ((TIM3 period +1)* (Repetition_Counter+1)) = 31.25 KHz and
a duty cycle equal to TIM3_CCR1/(TIM3_ARR + 1) = 33.3%
The TIM4 is running at:
(TIM1 frequency)/ ((TIM4 period +1)* (Repetition_Counter+1)) = 46.9 KHz and
a duty cycle equal to TIM4_CCR1/(TIM4_ARR + 1) = 50%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f2xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Set Timers instance */
TimMasterHandle.Instance = TIM1;
TimSlave1Handle.Instance = TIM3;
TimSlave2Handle.Instance = TIM4;
/*====================== Master configuration : TIM1 =======================*/
/* Initialize TIM1 peripheral in PWM mode*/
TimMasterHandle.Init.Period = 255;
TimMasterHandle.Init.Prescaler = 0;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 4;
if(HAL_TIM_PWM_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 127;
if(HAL_TIM_PWM_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle,&sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Master configuration : TIM1 ====================*/
/*====================== Slave1 configuration : TIM3 =======================*/
/* Initialize TIM3 peripheral in PWM mode*/
TimSlave1Handle.Init.Period = 2;
TimSlave1Handle.Init.Prescaler = 0;
TimSlave1Handle.Init.ClockDivision = 0;
TimSlave1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave1Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave1Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave1Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave1Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave1 configuration : TIM3 ====================*/
/*====================== Slave2 configuration : TIM4 =======================*/
/* Initialize TIM4 peripheral in PWM mode*/
TimSlave2Handle.Init.Period = 1;
TimSlave2Handle.Init.Prescaler = 0;
TimSlave2Handle.Init.ClockDivision = 0;
TimSlave2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave2Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimSlave2Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if(HAL_TIM_PWM_ConfigChannel(&TimSlave2Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlave2Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave2 configuration : TIM4 ====================*/
/* Start Master PWM generation */
if(HAL_TIM_PWM_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave1 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave1Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave2 PWM generation */
if(HAL_TIM_PWM_Start(&TimSlave2Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the prescaler value to have TIM3 counter clock equal to 18 MHz */
uwPrescalerValue = ((SystemCoreClock /2) / 18000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* Initialize TIMx peripheral as follow:
+ Prescaler = (SystemCoreClock/2)/18000000
+ Period = 1800 (to have an output frequency equal to 10 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Instance = TIMx;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = PULSE4_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief TIM1 Configuration 2 and channel 5 in PWM mode
* @note TIM1 configuration is based on APB1 frequency
* @note TIM1 Update event occurs each SystemCoreClock/FREQ
* @param None
* @retval None
*/
void TIM1_Config(void)
{
TIM_OC_InitTypeDef TIMPWM_Config;
/*##-1- Configure the TIM peripheral #######################################*/
/* Configure TIM1 */
/* PWM configuration */
PWM_Handle.Instance = TIM1;
/* Time Base configuration: Channel 2 and channel 5 frequency is
APB2 clock / period = 72000000 / 50000 = 1440 Hz */
PWM_Handle.Init.Period = 50000;
PWM_Handle.Init.Prescaler = 0;
PWM_Handle.Init.ClockDivision = 0;
PWM_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
PWM_Handle.Init.RepetitionCounter = 0;
HAL_TIM_PWM_Init(&PWM_Handle);
/*##-2- Configure the PWM Output Capture ########################################*/
/* PWM Output Capture configuration of TIM1 channel 2 */
/* Duty cycle is pulse/period = 100 * (37500 / 50000) = 75% */
TIMPWM_Config.OCMode = TIM_OCMODE_PWM1;
TIMPWM_Config.OCIdleState = TIM_OCIDLESTATE_RESET;
TIMPWM_Config.OCNIdleState = TIM_OCNIDLESTATE_RESET;
TIMPWM_Config.Pulse = 37500;
TIMPWM_Config.OCPolarity = TIM_OCPOLARITY_HIGH;
TIMPWM_Config.OCNPolarity = TIM_OCNPOLARITY_LOW;
TIMPWM_Config.OCFastMode = TIM_OCFAST_DISABLE;
if(HAL_TIM_PWM_ConfigChannel(&PWM_Handle, &TIMPWM_Config, TIM_CHANNEL_2) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM Output Capture ########################################*/
/* PWM Output Capture configuration of TIM1 channel 5 */
/* Channel 5 is an internal channel (not available on GPIO): */
/* TIM1 OC5 is high during 2000 / 72000000 = 27.7 micro second */
TIMPWM_Config.OCMode = TIM_OCMODE_PWM1;
TIMPWM_Config.OCIdleState = TIM_OCIDLESTATE_RESET;
TIMPWM_Config.OCNIdleState = TIM_OCNIDLESTATE_RESET;
TIMPWM_Config.Pulse = 2000;
TIMPWM_Config.OCPolarity = TIM_OCPOLARITY_HIGH;
TIMPWM_Config.OCNPolarity = TIM_OCNPOLARITY_LOW;
TIMPWM_Config.OCFastMode = TIM_OCFAST_DISABLE;
if(HAL_TIM_PWM_ConfigChannel(&PWM_Handle, &TIMPWM_Config, TIM_CHANNEL_5) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Enable TIM peripheral counter ######################################*/
/* Start the TIM1 Channel 2 PWM */
if(HAL_TIM_PWM_Start(&PWM_Handle, TIM_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
/* Start the TIM1 Channel 5 PWM */
if(HAL_TIM_PWM_Start(&PWM_Handle, TIM_CHANNEL_5) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief Commutation event callback in non blocking mode
* @param htim : hadc handle
* @retval None
*/
void HAL_TIMEx_CommutationCallback(TIM_HandleTypeDef *htim)
{
/* Entry state */
if (uwStep == 0)
{
/* Next step: Step 1 Configuration -------------------------------------- */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1);
HAL_TIMEx_OCN_Stop(&TimHandle, TIM_CHANNEL_1);
/* Channel3 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3);
HAL_TIMEx_OCN_Start(&TimHandle, TIM_CHANNEL_3);
HAL_TIM_PWM_Stop(&TimHandle, TIM_CHANNEL_3);
/* Channel2 configuration */
HAL_TIM_OC_Stop(&TimHandle, TIM_CHANNEL_2);
HAL_TIMEx_OCN_Stop(&TimHandle, TIM_CHANNEL_2);
uwStep = 1;
}
if (uwStep == 1)
{
/* Next step: Step 2 Configuration -------------------------------------- */
/* Channel1 configuration */
/* Same configuration as the previous step */
/* Channel2 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2);
HAL_TIMEx_OCN_Start(&TimHandle, TIM_CHANNEL_2);
/* Channel3 configuration */
HAL_TIMEx_OCN_Stop(&TimHandle, TIM_CHANNEL_3);
uwStep++;
}
else if (uwStep == 2)
{
/* Next step: Step 3 Configuration -------------------------------------- */
/* Channel2 configuration */
/* Same configuration as the previous step */
/* Channel3 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3);
/* Channel1 configuration */
HAL_TIM_OC_Stop(&TimHandle, TIM_CHANNEL_1);
uwStep++;
}
else if (uwStep == 3)
{
/* Next step: Step 4 Configuration -------------------------------------- */
/* Channel3 configuration */
/* Same configuration as the previous step */
/* Channel2 configuration */
HAL_TIMEx_OCN_Stop(&TimHandle, TIM_CHANNEL_2);
/* Channel1 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1);
HAL_TIMEx_OCN_Start(&TimHandle, TIM_CHANNEL_1);
uwStep++;
}
else if (uwStep == 4)
{
/* Next step: Step 5 Configuration -------------------------------------- */
/* Channel3 configuration */
HAL_TIM_OC_Stop(&TimHandle, TIM_CHANNEL_3);
/* Channel1 configuration */
/* Same configuration as the previous step */
/* Channel2 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2);
uwStep++;
}
else if (uwStep == 5)
{
/* Next step: Step 6 Configuration -------------------------------------- */
/* Channel3 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_3);
HAL_TIMEx_OCN_Start(&TimHandle, TIM_CHANNEL_3);
/* Channel1 configuration */
HAL_TIMEx_OCN_Stop(&TimHandle, TIM_CHANNEL_1);
/* Channel2 configuration */
/* Same configuration as the previous step */
uwStep++;
}
else
{
/* Next step: Step 1 Configuration -------------------------------------- */
/* Channel1 configuration */
sConfig.OCMode = TIM_OCMODE_PWM1;
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1);
/* Channel3 configuration */
/* Same configuration as the previous step */
/* Channel2 configuration */
HAL_TIM_OC_Stop(&TimHandle, TIM_CHANNEL_2);
uwStep = 1;
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization: global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Timers configuration ------------------------------------------------------
1/TIM3 is configured as Master Timer:
- PWM Mode is used
- The TIM3 Update event is used as Trigger Output
2/TIM2 is slave for TIM3 and Master for TIM4,
- PWM Mode is used
- The ITR2(TIM3) is used as input trigger
- Gated mode is used, so start and stop of slave counter
are controlled by the Master trigger output signal(TIM3 update event).
- The TIM2 Update event is used as Trigger Output.
3/TIM4 is slave for TIM2,
- PWM Mode is used
- The ITR1(TIM2) is used as input trigger
- Gated mode is used, so start and stop of slave counter
are controlled by the Master trigger output signal(TIM2 update event).
In this example TIM3 input clock (TIM3CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM3CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM3CLK = HCLK / 2 = SystemCoreClock /2
The TIM3 counter clock is equal to SystemCoreClock/2 = 180 MHz/2.
The Master Timer TIM3 is running at:
TIM3 frequency = TIM3 counter clock / (TIM3_Period + 1) = 351.562 KHz
TIM3_Period = (TIM3 counter clock / TIM3 frequency) - 1 = 182
and the duty cycle is equal to: TIM3_CCR1/(TIM3_ARR + 1) = 25%
The TIM2 is running:
- At (TIM3 frequency)/ (TIM2 period + 1) = 87.891 KHz and a duty cycle
equal to TIM2_CCR1/(TIM2_ARR + 1) = 25%
The TIM4 is running:
- At (TIM2 frequency)/ (TIM4 period + 1) = 21.973 KHz and a duty cycle
equal to TIM4_CCR1/(TIM4_ARR + 1) = 25%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in SystemClock_Config().
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Set Timers instance */
TimMasterHandle.Instance = TIM3;
TimSlave1Handle.Instance = TIM2;
TimSlave2Handle.Instance = TIM4;
/*====================== Master configuration : TIM3 =======================*/
/* Initialize TIM3 peripheral in PWM mode*/
TimMasterHandle.Init.Period = 255;
TimMasterHandle.Init.Prescaler = 0;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 64;
sOCConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sOCConfig.OCFastMode = TIM_OCFAST_DISABLE;
sOCConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sOCConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_PWM_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM2 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Master configuration : TIM3 ====================*/
/*====================== Slave1 configuration : TIM2 =======================*/
/* Initialize TIM2 peripheral in PWM mode*/
TimSlave1Handle.Init.Period = 3;
TimSlave1Handle.Init.Prescaler = 0;
TimSlave1Handle.Init.ClockDivision = 0;
TimSlave1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave1Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimSlave1Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if (HAL_TIM_PWM_ConfigChannel(&TimSlave1Handle, &sOCConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 1 (ITR1) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR2;
sSlaveConfig.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
sSlaveConfig.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&TimSlave1Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimSlave1Handle,&sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave1 configuration : TIM2 ====================*/
/*====================== Slave2 configuration : TIM4 =======================*/
/* Initialize TIM4 peripheral in PWM mode*/
TimSlave2Handle.Init.Period = 3;
TimSlave2Handle.Init.Prescaler = 0;
TimSlave2Handle.Init.ClockDivision = 0;
TimSlave2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave2Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimSlave2Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_3 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if (HAL_TIM_PWM_ConfigChannel(&TimSlave2Handle, &sOCConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM4 in Gated slave mode &
use the Internal Trigger 2 (ITR2) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR1;
if (HAL_TIM_SlaveConfigSynchronization(&TimSlave2Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave2 configuration : TIM4 ====================*/
/* Start Master PWM generation */
if (HAL_TIM_PWM_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave1 PWM generation */
if (HAL_TIM_PWM_Start(&TimSlave1Handle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave2 PWM generation */
if (HAL_TIM_PWM_Start(&TimSlave2Handle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
void drv8701_init(void)
{
TIM_OC_InitTypeDef sConfig;
TimHandle.Instance = TIM2;
TimHandle.Init.Prescaler = PRESCALER - 1;
TimHandle.Init.Period = PERIOD - 1;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
TimHandle2.Instance = TIM4;
TimHandle2.Init.Prescaler = PRESCALER - 1;
TimHandle2.Init.Period = PERIOD - 1;
TimHandle2.Init.ClockDivision = 0;
TimHandle2.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle2) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sConfig.Pulse = 0;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sConfig.Pulse = 0;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sConfig.Pulse = 0;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle2, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 4 */
sConfig.Pulse = 0;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle2, &sConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle2, TIM_CHANNEL_2) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
/* Start channel 4 */
if(HAL_TIM_PWM_Start(&TimHandle2, TIM_CHANNEL_4) != HAL_OK)
{
/* PWM Generation Error */
Error_Handler();
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F0xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure LED2 */
BSP_LED_Init(LED2);
/* Configure the system clock to 48 MHz */
SystemClock_Config();
/* Compute the prescaler value to have TIM1 counter clock equal to 12MHz */
uwPrescalerValue = (uint32_t) ((SystemCoreClock / 12000000) - 1);
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
1/ Generate 3 complementary PWM signals with 3 different duty cycles:
TIM1 input clock (TIM1CLK) is set to APB1 clock (PCLK1), since APB1
prescaler is 1.
TIM1CLK = PCLK1
PCLK1 = HCLK
=> TIM1CLK = HCLK = SystemCoreClock
TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is set to have
TIM1 counter clock = 12MHz.
The objective is to generate PWM signal at 10 KHz:
- TIM1_Period = (TIM1 counter clock / 10000) - 1
The Three Duty cycles are computed as the following description:
The channel 1 duty cycle is set to 50% so channel 1N is set to 50%.
The channel 2 duty cycle is set to 25% so channel 2N is set to 75%.
The channel 3 duty cycle is set to 12.5% so channel 3N is set to 87.5%.
The Timer pulse is calculated as follows:
- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
2/ Insert a dead time equal to (100/SystemCoreClock) us
3/ Configure the break feature, active at High level, and using the automatic
output enable feature
4/ Use the Locking parameters level1.
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f0xx.c file.
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Initialize TIM peripheral as follows:
+ Prescaler = (SystemCoreClock/12000000) - 1
+ Period = (1200 - 1) (to have an output frequency equal to 10 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
/* Select the Timer instance */
TimHandle.Instance = TIM1;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sPWMConfig.OCMode = TIM_OCMODE_PWM1;
sPWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sPWMConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
sPWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
/* Set the pulse value for channel 1 */
sPWMConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sPWMConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sPWMConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the Break feature & Dead time */
sBreakConfig.BreakState = TIM_BREAK_ENABLE;
sBreakConfig.DeadTime = 100;
sBreakConfig.OffStateRunMode = TIM_OSSR_ENABLE;
sBreakConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
sBreakConfig.LockLevel = TIM_LOCKLEVEL_1;
sBreakConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_ENABLE;
if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle, &sBreakConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to have a system clock = 180 Mhz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Compute the prescaler value to have TIM1 counter clock equal to 18 MHz */
uwPrescalerValue = (uint32_t) (SystemCoreClock / 18000000) - 1;
/*##-1- Configure the TIM peripheral #######################################*/
/* Initialize TIM peripheral as follow:
+ Prescaler = SystemCoreClock/18000000
+ Period = 1799 (to have an output frequency equal to 10 KHz)
+ ClockDivision = 0
+ Counter direction = Up
*/
/* Select the Timer instance */
TimHandle.Instance = TIM1;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.Period = PERIOD_VALUE;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the PWM channels #########################################*/
/* Common configuration for all channels */
sPWMConfig.OCMode = TIM_OCMODE_PWM1;
sPWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
sPWMConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
/* Set the pulse value for channel 1 */
sPWMConfig.Pulse = PULSE1_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 2 */
sPWMConfig.Pulse = PULSE2_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the pulse value for channel 3 */
sPWMConfig.Pulse = PULSE3_VALUE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Set the Break feature & Dead time */
sBreakConfig.BreakState = TIM_BREAK_ENABLE;
sBreakConfig.DeadTime = 11;
sBreakConfig.OffStateRunMode = TIM_OSSR_ENABLE;
sBreakConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
sBreakConfig.LockLevel = TIM_LOCKLEVEL_1;
sBreakConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_ENABLE;
if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle, &sBreakConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start PWM signals generation #######################################*/
/* Start channel 1 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 1N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 2N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3 */
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Start channel 3N */
if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Timers Configuration */
/* ---------------------------------------------------------------------------
TIM1 and Timers(TIM3 and TIM4) synchronisation in parallel mode.
1/TIM1 is configured as Master Timer:
- PWM Mode is used
- The TIM1 Update event is used as Trigger Output
2/TIM3 and TIM4 are slaves for TIM1,
- PWM Mode is used
- The ITR0(TIM1) is used as input trigger for both slaves
- Gated mode is used, so starts and stops of slaves counters
are controlled by the Master trigger output signal(update event).
In this example TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2),
since APB2 prescaler is different from 1.
TIM1CLK = 2 * PCLK2
PCLK2 = HCLK / 2
=> TIM1CLK = HCLK = SystemCoreClock
The TIM1 counter clock is equal to SystemCoreClock = 180 MHz.
The Master Timer TIM1 is running at:
TIM1 frequency = TIM1 counter clock / (TIM1_Period + 1) = 703.125 KHz
TIM1_Period = (TIM1 counter clock / TIM1 frequency) - 1 = 182
and the duty cycle is equal to: TIM1_CCR1/(TIM1_ARR + 1) = 50%
The TIM3 is running at:
(TIM1 frequency)/ ((TIM3 period +1)* (Repetition_Counter+1)) = 46.875 KHz and
a duty cycle equal to TIM3_CCR1/(TIM3_ARR + 1) = 33.3%
The TIM4 is running at:
(TIM1 frequency)/ ((TIM4 period +1)* (Repetition_Counter+1)) = 70.312 KHz and
a duty cycle equal to TIM4_CCR1/(TIM4_ARR + 1) = 50%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in SystemClock_Config().
Each time the core clock (HCLK) changes, user had to update SystemCoreClock
variable value. Otherwise, any configuration based on this variable will be incorrect.
This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
--------------------------------------------------------------------------- */
/* Set Timers instance */
TimMasterHandle.Instance = TIM1;
TimSlave1Handle.Instance = TIM3;
TimSlave2Handle.Instance = TIM4;
/*====================== Master configuration : TIM1 =======================*/
/* Initialize TIM1 peripheral in PWM mode*/
TimMasterHandle.Init.Period = 255;
TimMasterHandle.Init.Prescaler = 0;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 4;
if (HAL_TIM_PWM_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 127;
sOCConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sOCConfig.OCFastMode = TIM_OCFAST_DISABLE;
sOCConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sOCConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_PWM_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 as master & use the update event as Trigger Output (TRGO) */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Master configuration : TIM1 ====================*/
/*====================== Slave1 configuration : TIM3 =======================*/
/* Initialize TIM3 peripheral in PWM mode*/
TimSlave1Handle.Init.Period = 2;
TimSlave1Handle.Init.Prescaler = 0;
TimSlave1Handle.Init.ClockDivision = 0;
TimSlave1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave1Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimSlave1Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if (HAL_TIM_PWM_ConfigChannel(&TimSlave1Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
sSlaveConfig.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
sSlaveConfig.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&TimSlave1Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave1 configuration : TIM3 ====================*/
/*====================== Slave2 configuration : TIM4 =======================*/
/* Initialize TIM4 peripheral in PWM mode*/
TimSlave2Handle.Init.Period = 1;
TimSlave2Handle.Init.Prescaler = 0;
TimSlave2Handle.Init.ClockDivision = 0;
TimSlave2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlave2Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimSlave2Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the PWM_channel_3 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sOCConfig.Pulse = 1;
if (HAL_TIM_PWM_ConfigChannel(&TimSlave2Handle, &sOCConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR0) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
if (HAL_TIM_SlaveConfigSynchronization(&TimSlave2Handle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave2 configuration : TIM4 ====================*/
/* Start Master PWM generation */
if (HAL_TIM_PWM_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave1 PWM generation */
if (HAL_TIM_PWM_Start(&TimSlave1Handle, TIM_CHANNEL_1) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
/* Start Slave2 PWM generation */
if (HAL_TIM_PWM_Start(&TimSlave2Handle, TIM_CHANNEL_3) != HAL_OK)
{
/* PWM generation Error */
Error_Handler();
}
while (1)
{
}
}
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI1_Init();
MX_TIM2_Init();
MX_WWDG_Init();
/* USER CODE BEGIN 2 */
//HAL_TIM_Base_Start_IT(&htim3);
/* USER CODE END 2 */
/* USER CODE BEGIN RTOS_MUTEX */
/* add mutexes, ... */
/* USER CODE END RTOS_MUTEX */
/* USER CODE BEGIN RTOS_SEMAPHORES */
/* add semaphores, ... */
/* USER CODE END RTOS_SEMAPHORES */
/* USER CODE BEGIN RTOS_TIMERS */
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);
/* start timers, add new ones, ... */
/* USER CODE END RTOS_TIMERS */
/* Create the thread(s) */
/* definition and creation of defaultTask */
osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 96);
defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);
/* USER CODE BEGIN RTOS_THREADS */
/* add threads, ... */
/* USER CODE END RTOS_THREADS */
/* USER CODE BEGIN RTOS_QUEUES */
/* add queues, ... */
/* USER CODE END RTOS_QUEUES */
/* Start scheduler */
osKernelStart();
/* We should never get here as control is now taken by the scheduler */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
