/* TIM4 init function */
void MX_TIM4_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
htim4.Instance = TIM4;
htim4.Init.Prescaler = 0;
htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
htim4.Init.Period = 0;
htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_IC_Init(&htim4);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig);
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&htim4, &sConfigIC, TIM_CHANNEL_1);
HAL_TIM_IC_ConfigChannel(&htim4, &sConfigIC, TIM_CHANNEL_2);
}
/* TIM3 init function */
void MX_TIM3_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
htim3.Instance = TIM3;
htim3.Init.Prescaler = 71;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 0xffff;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&htim3);
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig);
HAL_TIM_IC_Init(&htim3);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig);
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_4);
}
/* TIM5 init function */
void MX_TIM5_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
TIM_OC_InitTypeDef sConfigOC;
htim5.Instance = TIM5;
htim5.Init.Prescaler = 0;
htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
htim5.Init.Period = 8400000 * 5; // 500 ms
htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_IC_Init(&htim5);
HAL_TIM_PWM_Init(&htim5);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig);
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_BOTHEDGE;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_1);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 840;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim5, &sConfigOC, TIM_CHANNEL_2);
HAL_TIM_MspPostInit(&htim5);
}
/**
* @brief Configures TIM5 to measure the LSI oscillator frequency.
* @param None
* @retval LSI Frequency
*/
static uint32_t GetLSIFrequency(void)
{
TIM_IC_InitTypeDef TIMInput_Config;
/* Configure the TIM peripheral *********************************************/
/* Set TIMx instance */
Input_Handle.Instance = TIM5;
/* TIM5 configuration: Input Capture mode ---------------------
The LSI oscillator is connected to TIM5 TIM_CHANNEL_4.
The Rising edge is used as active edge.
The TIM5 CCR TIM_CHANNEL_4 is used to compute the frequency value.
------------------------------------------------------------ */
Input_Handle.Init.Prescaler = 0;
Input_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
Input_Handle.Init.Period = 0xFFFF;
Input_Handle.Init.ClockDivision = 0;
if(HAL_TIM_IC_Init(&Input_Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Connect internally the TIM5 TIM_CHANNEL_4 Input Capture to the LSI clock output */
__HAL_RCC_AFIO_CLK_ENABLE();
__HAL_AFIO_REMAP_TIM5CH4_ENABLE();
/* Configure the Input Capture of TIM_CHANNEL_4 */
TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV8;
TIMInput_Config.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&Input_Handle, &TIMInput_Config, TIM_CHANNEL_4) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Start the TIM Input Capture measurement in interrupt mode */
if(HAL_TIM_IC_Start_IT(&Input_Handle, TIM_CHANNEL_4) != HAL_OK)
{
Error_Handler();
}
/* Wait until the TIM5 get 2 LSI edges */
while(uwCaptureNumber != 2)
{
}
/* Disable TIM5 CC1 Interrupt Request */
HAL_TIM_IC_Stop_IT(&Input_Handle, TIM_CHANNEL_4);
/* Deinitialize the TIM5 peripheral registers to their default reset values */
HAL_TIM_IC_DeInit(&Input_Handle);
return uwLsiFreq;
}
/* TIM1 init function */
void MX_TIM1_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_SlaveConfigTypeDef sSlaveConfig;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
htim1.Instance = TIM1;
htim1.Init.Prescaler = 167;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 0xFFFF;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
HAL_TIM_Base_Init(&htim1);
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig);
HAL_TIM_IC_Init(&htim1);
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI1F_ED;
sSlaveConfig.TriggerPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sSlaveConfig.TriggerFilter = 0;
HAL_TIM_SlaveConfigSynchronization(&htim1, &sSlaveConfig);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig);
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC, TIM_CHANNEL_1);
HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC, TIM_CHANNEL_2);
HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC, TIM_CHANNEL_3);
HAL_TIM_ConfigTI1Input(&htim1, TIM_TI1SELECTION_XORCOMBINATION);
}
void TIM_Init(TIM_HandleTypeDef *timh)
{
TIM_IC_InitTypeDef sConfig;
timh->Init.Period = 0xFFFF;
timh->Init.Prescaler = 0;
timh->Init.Prescaler = ((SystemCoreClock) / 1000000) - 1; // 1Mhz
timh->Init.ClockDivision = 0;
timh->Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_IC_Init(timh);
// Common configuration
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
// Configure the Input Capture of channel 1
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
HAL_TIM_IC_ConfigChannel(timh, &sConfig, TIM_CHANNEL_1);
// Configure the Input Capture of channel 2
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
HAL_TIM_IC_ConfigChannel(timh, &sConfig, TIM_CHANNEL_2);
// Configure the Input Capture of channel 3
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
HAL_TIM_IC_ConfigChannel(timh, &sConfig, TIM_CHANNEL_3);
// Configure the Input Capture of channel 4
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
HAL_TIM_IC_ConfigChannel(timh, &sConfig, TIM_CHANNEL_4);
HAL_TIM_IC_Start_IT(timh, TIM_CHANNEL_1);
HAL_TIM_IC_Start_IT(timh, TIM_CHANNEL_2);
HAL_TIM_IC_Start_IT(timh, TIM_CHANNEL_3);
HAL_TIM_IC_Start_IT(timh, TIM_CHANNEL_4);
}
/**
* @brief TIM4 Configuration
* @note TIM4 configuration is based on APB1 frequency
* @note TIM4 Update event occurs each Input Capture Rising Edge
* @param None
* @retval None
*/
void TIM4_Config(void)
{
TIM_IC_InitTypeDef TIMInput_Config;
uint16_t PeriodValue = 0;
TIM_SlaveConfigTypeDef sSlaveConfig;
/*##-1- Configure the TIM peripheral #######################################*/
/* Input Capture configuration */
Input_Handle.Instance = TIM4;
/* Calculate the period value */
PeriodValue = (uint16_t) ((SystemCoreClock) / FREQ);
Input_Handle.Init.Period = PeriodValue;
Input_Handle.Init.Prescaler = 0;
Input_Handle.Init.ClockDivision = 0;
Input_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
Input_Handle.Init.RepetitionCounter = 0;
HAL_TIM_IC_Init(&Input_Handle);
/*##-2- Configure the Input Capture ########################################*/
/* Input Capture configuration of channel 2 */
TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV1;
TIMInput_Config.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&Input_Handle, &TIMInput_Config, TIM_CHANNEL_2) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-3- Configure the Trigger Input ########################################*/
/* TIM4 Input Trigger selection */
sSlaveConfig.InputTrigger = TIM_TS_ITR2;
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_TRIGGER;
HAL_TIM_SlaveConfigSynchronization(&Input_Handle, &sSlaveConfig);
/* Reset the flags */
Input_Handle.Instance->SR = 0;
/*##-4- Enable TIM peripheral counter ######################################*/
/* Start the TIM Input Capture measurement in interrupt mode */
if(HAL_TIM_IC_Start_IT(&Input_Handle, TIM_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
}
/* TIM5 init function */
void MX_TIM5_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
htim5.Instance = TIM5;
htim5.Init.Prescaler = 0;
htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
htim5.Init.Period = 0xFFFFFFFF;
htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_IC_Init(&htim5) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_BOTHEDGE;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 15;
if (HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_3) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
if (HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_4) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
}
DHT22_RESULT DHT22_Init(DHT22_HandleTypeDef* handle) {
handle->timHandle.Init.Period = 0xFFFF;
handle->timHandle.Init.Prescaler = 0;
handle->timHandle.Init.ClockDivision = 0;
handle->timHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_IC_Init(&handle->timHandle) != HAL_OK) {
return DHT22_ERROR;
}
handle->timICHandle.ICPolarity = TIM_ICPOLARITY_FALLING;
handle->timICHandle.ICSelection = TIM_ICSELECTION_DIRECTTI;
handle->timICHandle.ICPrescaler = TIM_ICPSC_DIV1;
handle->timICHandle.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&handle->timHandle, &handle->timICHandle,
handle->timChannel) != HAL_OK) {
return DHT22_ERROR;
}
return DHT22_OK;
}
/**
* @brief Configures TIM2 channel 4 in input capture mode
* @param None
* @retval None
*/
static void TIM_Config(void)
{
/*##-1- Configure the TIM peripheral #######################################*/
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIMx peripheral as follow:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Error */
ErrorHandler();
}
HAL_TIMEx_RemapConfig(&TimHandle, TIM2_TI4_COMP1);
/*##-2- Configure the Input Capture channel ################################*/
/* Configure the Input Capture of channel 4 */
sICConfig.ICPolarity = TIM_ICPOLARITY_BOTHEDGE;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sICConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/*##-3- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
}
void pwmICConfig(TIM_TypeDef *tim, uint8_t channel, uint16_t polarity)
{
TIM_HandleTypeDef* Handle = timerFindTimerHandle(tim);
if (Handle == NULL) return;
TIM_IC_InitTypeDef TIM_ICInitStructure;
TIM_ICInitStructure.ICPolarity = polarity;
TIM_ICInitStructure.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIM_ICInitStructure.ICPrescaler = TIM_ICPSC_DIV1;
if (inputFilteringMode == INPUT_FILTERING_ENABLED) {
TIM_ICInitStructure.ICFilter = INPUT_FILTER_TO_HELP_WITH_NOISE_FROM_OPENLRS_TELEMETRY_RX;
} else {
TIM_ICInitStructure.ICFilter = 0x00;
}
HAL_TIM_IC_ConfigChannel(Handle, &TIM_ICInitStructure, channel);
HAL_TIM_IC_Start_IT(Handle,channel);
}
/**
* @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
*/
if(HAL_Init()!= HAL_OK)
{
/* Start Conversation Error */
Error_Handler();
}
/* Configure the system clock to 84 Mhz */
SystemClock_Config();
/* Configure LED5 */
BSP_LED_Init(LED5);
/*##-1- Configure the TIM peripheral #######################################*/
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIMx peripheral as follow:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channels ###############################*/
/* Common configuration */
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
/* Configure the Input Capture of channel 1 */
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure the Input Capture of channel 2 */
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Configure the slave mode ###########################################*/
/* Select the slave Mode: Reset Mode */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
if(HAL_TIM_SlaveConfigSynchronization(&TimHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-4- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/*##-5- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/* TIM5 init function */
void MX_TIM5_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_SlaveConfigTypeDef sSlaveConfig;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_IC_InitTypeDef sConfigIC;
htim5.Instance = TIM5;
htim5.Init.Prescaler = 840;
htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
htim5.Init.Period = 65535;
htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_Base_Init(&htim5) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim5, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
if (HAL_TIM_IC_Init(&htim5) != HAL_OK)
{
Error_Handler();
}
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
sSlaveConfig.TriggerPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&htim5, &sSlaveConfig) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
sConfigIC.ICSelection = TIM_ICSELECTION_INDIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
if (HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_2) != HAL_OK)
{
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();
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
TIM3 configuration: PWM Input mode
In this example TIM3 input clock (TIM3CLK) is set to APB1 clock (PCLK1),
since APB1 prescaler is 1.
TIM3CLK = PCLK1
PCLK1 = HCLK
=> TIM3CLK = HCLK = SystemCoreClock
External Signal Frequency = TIM3 counter clock / TIM3_CCR2 in Hz.
External Signal DutyCycle = (TIM3_CCR1*100)/(TIM3_CCR2) in %.
--------------------------------------------------------------------------- */
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIMx peripheral as follows:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if (HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channels ###############################*/
/* Common configuration */
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
/* Configure the Input Capture of channel 1 */
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
if (HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure the Input Capture of channel 2 */
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
if (HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Configure the slave mode ###########################################*/
/* Select the slave Mode: Reset Mode */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
sSlaveConfig.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
sSlaveConfig.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&TimHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-4- Start the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/*##-5- Start the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @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
}
void Pb_init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable PB clock */
__BRD_PB_GPIO_CLK();
/* Set priority of PB Interrupt [0 (HIGH priority) to 15(LOW priority)] */
HAL_NVIC_SetPriority(BRD_PB_EXTI_IRQ, 4, 0); //Set Main priority ot 10 and sub-priority ot 0.
//Enable PB interrupt and interrupt vector for pin DO
NVIC_SetVector(BRD_PB_EXTI_IRQ, (uint32_t)&exti_pb_irqhandler);
NVIC_EnableIRQ(BRD_PB_EXTI_IRQ);
/* Configure PB pin as pull down input */
GPIO_InitStructure.Pin = BRD_PB_PIN; //Pin
GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING; //interrupt Mode
GPIO_InitStructure.Pull = GPIO_PULLUP; //Enable Pull up, down or no pull resister
GPIO_InitStructure.Speed = GPIO_SPEED_FAST; //Pin latency
HAL_GPIO_Init(BRD_PB_GPIO_PORT, &GPIO_InitStructure); //Initialise Pin
/*Set up Interrupt timer for laser transmit and pan tilt*/
__PANTILT_IR_TIMER_CLK();
/* Compute the prescaler value for 50Khz */
PrescalerValue = (uint16_t) ((SystemCoreClock /2)/1000000) - 1;
/* Time base configuration */
TIM_Init.Instance = PANTILT_IR_TIM; //Enable Timer 2
//Set period count to be 1ms, so timer interrupt occurs every (1ms)*0.2.
TIM_Init.Init.Period = (1000000/1000)*(vars->period_multiplyer); //10 = 1ms; 5 = 0.5ms 1khz half bit period for 100khz
TIM_Init.Init.Prescaler = PrescalerValue; //Set presale value
TIM_Init.Init.ClockDivision = 0; //Set clock division
TIM_Init.Init.RepetitionCounter = 0; // Set Reload Value
TIM_Init.Init.CounterMode = TIM_COUNTERMODE_UP; //Set timer to count up.
/*Initialise Laser Transmit Port*/
__LASER_WAVE_GEN_1_GPIO_CLK();
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_PULLDOWN;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Pin = LASER_WAVE_GEN_1_PIN;
HAL_GPIO_Init(LASER_WAVE_GEN_1_GPIO_PORT, &GPIO_InitStructure);
HAL_Delay(500);
/* Initialise General interrupt Timer */
HAL_TIM_Base_Init(&TIM_Init);
/* Set priority of Timer 2 update Interrupt [0 (HIGH priority) to 15(LOW priority)] */
/* DO NOT SET INTERRUPT PRIORITY HIGHER THAN 3 */
HAL_NVIC_SetPriority(PANTILT_TIM_IRQn, 10, 0); //Set Main priority ot 10 and sub-priority ot 0.
/* Enable timer update interrupt and interrupt vector for Timer */
NVIC_SetVector(PANTILT_TIM_IRQn, (uint32_t)&s4353096_general_irqhandler);
NVIC_EnableIRQ(PANTILT_TIM_IRQn);
/*Start the timer*/
HAL_TIM_Base_Start_IT(&TIM_Init);
/*Initialise Input capture*/
__TIM3_CLK_ENABLE();
/* Enable the D0 Clock */
__BRD_D0_GPIO_CLK();
/* Configure the D0 pin with TIM3 input capture */
GPIO_InitStructure.Pin = BRD_D0_PIN; //Pin
GPIO_InitStructure.Mode =GPIO_MODE_AF_PP; //Set mode to be output alternate
GPIO_InitStructure.Pull = GPIO_NOPULL; //Enable Pull up, down or no pull resister
GPIO_InitStructure.Speed = GPIO_SPEED_FAST; //Pin latency
GPIO_InitStructure.Alternate = GPIO_AF2_TIM3; //Set alternate function to be timer 2
HAL_GPIO_Init(BRD_D0_GPIO_PORT, &GPIO_InitStructure); //Initialise Pin
/* Compute the prescaler value. SystemCoreClock = 168000000 - set for 500Khz clock */
PrescalerValue = (uint16_t) ((SystemCoreClock /2) / 500000) - 1;
/* Configure Timer 3 settings */
TIM_Init.Instance = TIM3; //Enable Timer 3
TIM_Init.Init.Period = 2*500000; //Set for 100ms (10Hz) period
TIM_Init.Init.Prescaler = PrescalerValue; //Set presale value
TIM_Init.Init.ClockDivision = 0; //Set clock division
TIM_Init.Init.RepetitionCounter = 0; // Set Reload Value
TIM_Init.Init.CounterMode = TIM_COUNTERMODE_UP; //Set timer to count up.
/* Configure TIM3 Input capture */
TIM_ICInitStructure.ICPolarity = TIM_ICPOLARITY_RISING; //Set to trigger on rising edge
TIM_ICInitStructure.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIM_ICInitStructure.ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.ICFilter = 0;
/* Set priority of Timer 3 Interrupt [0 (HIGH priority) to 15(LOW priority)] */
HAL_NVIC_SetPriority(TIM3_IRQn, 10, 0); //Set Main priority ot 10 and sub-priority ot 0.
//Enable Timer 3 interrupt and interrupt vector
NVIC_SetVector(TIM3_IRQn, (uint32_t)&tim3_irqhandler);
NVIC_EnableIRQ(TIM3_IRQn);
/* Enable input capture for Timer 3, channel 2 */
HAL_TIM_IC_Init(&TIM_Init);
HAL_TIM_IC_ConfigChannel(&TIM_Init, &TIM_ICInitStructure, TIM_CHANNEL_2);
/* Start Input Capture */
HAL_TIM_IC_Start_IT(&TIM_Init, TIM_CHANNEL_2);
}
void wheelencoder_init(void)
{
TIM_IC_InitTypeDef sICConfig;
TimHandle[0].Instance = TIM17;
TimHandle[0].Init.Period = PERIOD - 1;
TimHandle[0].Init.Prescaler = PRESCALER - 1;
TimHandle[0].Init.ClockDivision = 0;
TimHandle[0].Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle[0]) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channel ################################*/
/* Configure the Input Capture of channel 2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 15; // Use max filter to avoid jitter
if(HAL_TIM_IC_ConfigChannel(&TimHandle[0], &sICConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
if(HAL_TIM_IC_Start_IT(&TimHandle[0], TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
if(HAL_TIM_Base_Start_IT(&TimHandle[0]) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
TimHandle[1].Instance = TIM1;
TimHandle[1].Init.Period = PERIOD - 1;
TimHandle[1].Init.Prescaler = PRESCALER - 1;
TimHandle[1].Init.ClockDivision = 0;
TimHandle[1].Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle[1]) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channel ################################*/
/* Configure the Input Capture of channel 2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 15; // Use max filter to avoid jitter
if(HAL_TIM_IC_ConfigChannel(&TimHandle[1], &sICConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
if(HAL_TIM_IC_Start_IT(&TimHandle[1], TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
if(HAL_TIM_Base_Start_IT(&TimHandle[1]) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
}
/**
* @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 synchronisation in cascade mode with an external trigger -----
1/TIM1 is configured as Master Timer:
- Toggle Mode is used
- The TIM1 Enable event is used as Trigger Output
2/TIM1 is configured as Slave Timer for an external Trigger connected
to TIM1 TI2 pin (TIM1 CH2 configured as input pin):
- The TIM1 TI2FP2 is used as Trigger Input
- Rising edge is used to start and stop the TIM1: Gated Mode.
3/TIM3 is slave for TIM1 and Master for TIM4,
- Toggle Mode is used
- The ITR1(TIM1) is used as input trigger
- Gated mode is used, so start and stop of slave counter
are controlled by the Master trigger output signal(TIM1 enable event).
- The TIM3 enable event is used as Trigger Output.
4/TIM4 is slave for TIM3,
- Toggle 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 enable event).
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
TIM3/TIM4 input clock (TIM3CLK/TIM4CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM3CLK/TIM4CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM3CLK/TIM4CLK = HCLK / 2 = SystemCoreClock /2
The TIM1CLK is fixed to 120 MHZ, the Prescaler is equal to 5 so the TIMx clock
counter is equal to 28 MHz.
The TIM3CLK and TIM4CLK are fixed to 84 MHZ, the Prescaler is equal to 5
so the TIMx clock counter is equal to 14 MHz.
The Three Timers are running at:
TIMx frequency = TIMx clock counter/ 2*(TIMx_Period + 1) = 93,3 KHz.
The starts and stops of the TIM1 counters are controlled by the
external trigger.
The TIM3 starts and stops are controlled by the TIM1, and the TIM4
starts and stops are controlled by the TIM3.
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;
TimSlaveMasterHandle.Instance = TIM3;
TimSlaveHandle.Instance = TIM4;
/*======= Master1/Slave for an external trigger configuration : TIM1 =======*/
/* Initialize TIM1 peripheral in Output Compare mode*/
TimMasterHandle.Init.Period = 149;
TimMasterHandle.Init.Prescaler = 5;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimMasterHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_OC_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the output: Channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure the Input: channel_2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimMasterHandle, &sICConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 in Gated Slave mode for the external trigger (Filtered Timer
Input 2) */
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
if( HAL_TIM_SlaveConfigSynchronization(&TimMasterHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 in Master Enable mode & use the update event as Trigger
Output (TRGO) */
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*=== End of Master1/Slave for an external trigger configuration : TIM1 ====*/
/*=================== Slave/Master configuration : TIM3 ====================*/
/* Initialize TIM3 peripheral in Output Compare mode*/
TimSlaveMasterHandle.Init.Period = 74;
TimSlaveMasterHandle.Init.Prescaler = 5;
TimSlaveMasterHandle.Init.ClockDivision = 0;
TimSlaveMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlaveMasterHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_OC_Init(&TimSlaveMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Output Compare channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimSlaveMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Gated Slave mode for the internal trigger 0(ITR0) */
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
if( HAL_TIM_SlaveConfigSynchronization(&TimSlaveMasterHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM3 in Master Enable mode & use the update event as Trigger
Output (TRGO) */
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimSlaveMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*=============== End of Slave/Master configuration : TIM3 =================*/
/*====================== Slave configuration : TIM4 ========================*/
/* Initialize TIM4 peripheral in Output Compare mode*/
TimSlaveHandle.Init.Period = 74;
TimSlaveHandle.Init.Prescaler = 5;
TimSlaveHandle.Init.ClockDivision = 0;
TimSlaveHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimSlaveHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_OC_Init(&TimSlaveHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Output Compare channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimSlaveHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM4 in Gated Slave mode for the internal trigger 2(ITR2) */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR2;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlaveHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave configuration : TIM4 =====================*/
/* 1- Start Timer1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start Channel2 in Input Capture */
if(HAL_TIM_IC_Start(&TimMasterHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* 2- Start Timer3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimSlaveMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* 3- Start Timer3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimSlaveHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*This sample code shows how to use STM32L0xx TIM HAL API to measure the
frequency and duty cycle of an external signal through the STM32L0xx HAL API. */
/* 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();
/*##-1- Configure the TIM peripheral #######################################*/
/* Set TIM instance */
TimHandle.Instance = TIM2;
/* Initialize TIMx peripheral as follow:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
ErrorHandler();
}
/*##-2- Configure the Input Capture channels ###############################*/
/* Common configuration */
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
/* Configure the Input Capture of channel 1 */
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/* Configure the Input Capture of channel 2 */
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/*##-3- Configure the slave mode ###########################################*/
/* Select the slave Mode: Reset Mode */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
if(HAL_TIM_SlaveConfigSynchronization(&TimHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
ErrorHandler();
}
/*##-4- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
/*##-5- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
ErrorHandler();
}
while (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);
/*##-1- Configure the TIM peripheral #######################################*/
/* TIM1 configuration: Input Capture mode ---------------------
The external signal is connected to TIM1 CH2 pin (PA.09 - )
The Rising edge is used as active edge,
The TIM1 CCR2 is used to compute the frequency value
------------------------------------------------------------ */
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIMx peripheral as follows:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channel ################################*/
/* Configure the Input Capture of channel 2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sICConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != 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);
/*##-1- Configure the TIM peripheral #######################################*/
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIMx peripheral as follows:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channel ################################*/
/* Configure the Input Capture of channel 2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sICConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != 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 168 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##-1- Configure the TIM peripheral #######################################*/
/* ---------------------------------------------------------------------------
TIM4 configuration: PWM Input mode
In this example TIM4 input clock (TIM4CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM4CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM4CLK = HCLK / 2 = SystemCoreClock /2
External Signal Frequency = TIM4 counter clock / TIM4_CCR2 in Hz.
External Signal DutyCycle = (TIM4_CCR1*100)/(TIM4_CCR2) in %.
--------------------------------------------------------------------------- */
/* Set TIMx instance */
TimHandle.Instance = TIM4;
/* Initialize TIMx peripheral as follow:
+ Period = 0xFFFF
+ Prescaler = 0
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = 0;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_IC_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Input Capture channels ###############################*/
/* Common configuration */
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
/* Configure the Input Capture of channel 1 */
sConfig.ICPolarity = TIM_ICPOLARITY_FALLING;
sConfig.ICSelection = TIM_ICSELECTION_INDIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure the Input Capture of channel 2 */
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
if(HAL_TIM_IC_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-3- Configure the slave mode ###########################################*/
/* Select the slave Mode: Reset Mode */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
if(HAL_TIM_SlaveConfigSynchronization(&TimHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-4- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/*##-5- Start the Input Capture in interrupt mode ##########################*/
if(HAL_TIM_IC_Start_IT(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Configures TIM5 to measure the LSI oscillator frequency.
* @param None
* @retval LSI Frequency
*/
static uint32_t GetLSIFrequency(void)
{
uint32_t pclk1 = 0;
TIM_IC_InitTypeDef timinputconfig;
/* Enable the LSI oscillator */
__HAL_RCC_LSI_ENABLE();
/* Wait till LSI is ready */
while (__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Configure the TIM peripheral */
/* Set TIMx instance */
TimInputCaptureHandle.Instance = TIM5;
/* TIM5 configuration: Input Capture mode ---------------------
The LSI oscillator is connected to TIM5 CH4.
The Rising edge is used as active edge.
The TIM5 CCR4 is used to compute the frequency value.
------------------------------------------------------------ */
TimInputCaptureHandle.Init.Prescaler = 0;
TimInputCaptureHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimInputCaptureHandle.Init.Period = 0xFFFF;
TimInputCaptureHandle.Init.ClockDivision = 0;
TimInputCaptureHandle.Init.RepetitionCounter = 0;
if(HAL_TIM_IC_Init(&TimInputCaptureHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Connect internally the TIM5_CH4 Input Capture to the LSI clock output */
HAL_TIMEx_RemapConfig(&TimInputCaptureHandle, TIM_TIM5_LSI);
/* Configure the Input Capture of channel 4 */
timinputconfig.ICPolarity = TIM_ICPOLARITY_RISING;
timinputconfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
timinputconfig.ICPrescaler = TIM_ICPSC_DIV8;
timinputconfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimInputCaptureHandle, &timinputconfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Reset the flags */
TimInputCaptureHandle.Instance->SR = 0;
/* Start the TIM Input Capture measurement in interrupt mode */
if(HAL_TIM_IC_Start_IT(&TimInputCaptureHandle, TIM_CHANNEL_4) != HAL_OK)
{
Error_Handler();
}
/* Wait until the TIM5 get 2 LSI edges (refer to TIM5_IRQHandler() in
stm32f4xx_it.c file) */
while(uwMeasurementDone == 0)
{
}
uwCaptureNumber = 0;
/* Deinitialize the TIM5 peripheral registers to their default reset values */
HAL_TIM_IC_DeInit(&TimInputCaptureHandle);
/* Compute the LSI frequency, depending on TIM5 input clock frequency (PCLK1)*/
/* Get PCLK1 frequency */
pclk1 = HAL_RCC_GetPCLK1Freq();
/* Get PCLK1 prescaler */
if((RCC->CFGR & RCC_CFGR_PPRE1) == 0)
{
/* PCLK1 prescaler equal to 1 => TIMCLK = PCLK1 */
return ((pclk1 / uwPeriodValue) * 8);
}
else
{ /* PCLK1 prescaler different from 1 => TIMCLK = 2 * PCLK1 */
return (((2 * pclk1) / uwPeriodValue) * 8);
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* Enable the CPU Cache */
CPU_CACHE_Enable();
/* STM32F7xx HAL library initialization:
- Configure the Flash ART accelerator on ITCM interface
- 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 216 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Set Timers instance */
TimMasterHandle.Instance = TIM1;
TimSlaveMasterHandle.Instance = TIM4;
TimSlaveHandle.Instance = TIM5;
/*======= Master1/Slave for an external trigger configuration : TIM1 =======*/
/* Initialize TIM1 peripheral in Output Compare mode*/
TimMasterHandle.Init.Period = 79;
TimMasterHandle.Init.Prescaler = (SystemCoreClock / 16000000) - 1;;
TimMasterHandle.Init.ClockDivision = 0;
TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_OC_Init(&TimMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the output: Channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure the Input: channel_2 */
sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
sICConfig.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&TimMasterHandle, &sICConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 in Gated Slave mode for the external trigger (Filtered Timer
Input 2) */
sSlaveConfig.InputTrigger = TIM_TS_TI2FP2;
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
if( HAL_TIM_SlaveConfigSynchronization(&TimMasterHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM1 in Master Enable mode & use the update event as Trigger
Output (TRGO) */
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*=== End of Master1/Slave for an external trigger configuration : TIM1 ====*/
/*=================== Slave/Master configuration : TIM4 ====================*/
/* Initialize TIM4 peripheral in Output Compare mode*/
TimSlaveMasterHandle.Init.Period = 79;
TimSlaveMasterHandle.Init.Prescaler = ((SystemCoreClock/2) / 16000000) - 1;;
TimSlaveMasterHandle.Init.ClockDivision = 0;
TimSlaveMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_OC_Init(&TimSlaveMasterHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Output Compare channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimSlaveMasterHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM4 in Gated Slave mode for the internal trigger 0(ITR0) */
sSlaveConfig.InputTrigger = TIM_TS_ITR0;
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
if( HAL_TIM_SlaveConfigSynchronization(&TimSlaveMasterHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM4 in Master Enable mode & use the update event as Trigger
Output (TRGO) */
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;
if( HAL_TIMEx_MasterConfigSynchronization(&TimSlaveMasterHandle, &sMasterConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*=============== End of Slave/Master configuration : TIM4 =================*/
/*====================== Slave configuration : TIM5 ========================*/
/* Initialize TIM5 peripheral in Output Compare mode*/
TimSlaveHandle.Init.Period = 79;
TimSlaveHandle.Init.Prescaler = ((SystemCoreClock/2) / 16000000) - 1;;
TimSlaveHandle.Init.ClockDivision = 0;
TimSlaveHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_OC_Init(&TimSlaveHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Output Compare channel_1 */
sOCConfig.OCMode = TIM_OCMODE_TOGGLE;
sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
if(HAL_TIM_OC_ConfigChannel(&TimSlaveHandle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/* Configure TIM5 in Gated Slave mode for the internal trigger 2(ITR2) */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_GATED;
sSlaveConfig.InputTrigger = TIM_TS_ITR2;
if(HAL_TIM_SlaveConfigSynchronization(&TimSlaveHandle, &sSlaveConfig) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*================== End of Slave configuration : TIM5 =====================*/
/* 1- Start Timer1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start Channel2 in Input Capture */
if(HAL_TIM_IC_Start(&TimMasterHandle, TIM_CHANNEL_2) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* 2- Start Timer3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimSlaveMasterHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* 3- Start Timer3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */
/* Start the Output Compare */
if(HAL_TIM_OC_Start(&TimSlaveHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Configures TIM5 to measure the LSI oscillator frequency.
* @param None
* @retval LSI Frequency
*/
static uint32_t GetLSIFrequency(void)
{
uint32_t pclk1 = 0, latency = 0;
TIM_IC_InitTypeDef timinputconfig = {0};
RCC_OscInitTypeDef oscinit = {0};
RCC_ClkInitTypeDef clkinit = {0};
/* Enable LSI Oscillator */
oscinit.OscillatorType = RCC_OSCILLATORTYPE_LSI;
oscinit.LSIState = RCC_LSI_ON;
oscinit.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&oscinit)!= HAL_OK)
{
Error_Handler();
}
/* Configure the TIM peripheral */
/* Set TIMx instance */
TimInputCaptureHandle.Instance = TIMx;
/* TIMx configuration: Input Capture mode ---------------------
The LSI clock is connected to TIM5 CH4.
The Rising edge is used as active edge.
The TIM5 CCR4 is used to compute the frequency value.
------------------------------------------------------------ */
TimInputCaptureHandle.Init.Prescaler = 0;
TimInputCaptureHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimInputCaptureHandle.Init.Period = 0xFFFF;
TimInputCaptureHandle.Init.ClockDivision = 0;
TimInputCaptureHandle.Init.RepetitionCounter = 0;
if (HAL_TIM_IC_Init(&TimInputCaptureHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Connect internally the TIM5 CH4 Input Capture to the LSI clock output */
HAL_TIMEx_RemapConfig(&TimInputCaptureHandle, TIMx_REMAP);
/* Configure the Input Capture of channel 4 */
timinputconfig.ICPolarity = TIM_ICPOLARITY_RISING;
timinputconfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
timinputconfig.ICPrescaler = TIM_ICPSC_DIV8;
timinputconfig.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&TimInputCaptureHandle, &timinputconfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Reset the flags */
TimInputCaptureHandle.Instance->SR = 0;
/* Start the TIM Input Capture measurement in interrupt mode */
if (HAL_TIM_IC_Start_IT(&TimInputCaptureHandle, TIM_CHANNEL_4) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/* Wait until the TIM5 get 2 LSI edges (refer to TIM5_IRQHandler() in
stm32f4xx_it.c file) */
while (uwMeasurementDone == 0)
{
}
uwCaptureNumber = 0;
/* Deinitialize the TIM5 peripheral registers to their default reset values */
HAL_TIM_IC_DeInit(&TimInputCaptureHandle);
/* Compute the LSI frequency, depending on TIM5 input clock frequency (PCLK1)*/
/* Get PCLK1 frequency */
pclk1 = HAL_RCC_GetPCLK1Freq();
HAL_RCC_GetClockConfig(&clkinit, &latency);
/* Get PCLK1 prescaler */
if ((clkinit.APB1CLKDivider) == RCC_HCLK_DIV1)
{
/* PCLK1 prescaler equal to 1 => TIMCLK = PCLK1 */
return ((pclk1 / uwPeriodValue) * 8);
}
else
{
/* PCLK1 prescaler different from 1 => TIMCLK = 2 * PCLK1 */
return (((2 * pclk1) / uwPeriodValue) * 8) ;
}
}
/**
* @brief Configures TIM14 to measure the LSI oscillator frequency.
* @param None
* @retval LSI Frequency
*/
static uint32_t GetLSIFrequency(void)
{
TIM_IC_InitTypeDef TIMInput_Config;
/* Configure the TIM peripheral *********************************************/
/* Set TIMx instance */
Input_Handle.Instance = TIM14;
/* TIM14 configuration: Input Capture mode ---------------------
The LSI oscillator is connected to TIM14 CH1.
The Rising edge is used as active edge.
The TIM14 CCR1 is used to compute the frequency value.
------------------------------------------------------------ */
Input_Handle.Init.Prescaler = 0;
Input_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
Input_Handle.Init.Period = 0xFFFF;
Input_Handle.Init.ClockDivision = 0;
Input_Handle.Init.RepetitionCounter = 0;
if(HAL_TIM_IC_Init(&Input_Handle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Connect internally the TIM14_CH1 Input Capture to the LSI clock output */
Input_Handle.Instance->OR |= 0x3; // TIM14_OR linked to MCO
HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_LSI, RCC_MCODIV_1);
/* Configure the Input Capture of channel 1 */
TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV8;
TIMInput_Config.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&Input_Handle, &TIMInput_Config, TIM_CHANNEL_1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Reset the flags */
Input_Handle.Instance->SR = 0;
/* Start the TIM Input Capture measurement in interrupt mode */
if(HAL_TIM_IC_Start_IT(&Input_Handle, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
/* Wait until the TIM14 get 2 LSI edges (refer to TIM14_IRQHandler() in
stm32f3xx_it.c file) ******************************************************/
while(uwCaptureNumber != 2)
{
}
/* Disable TIM14 CC1 Interrupt Request */
HAL_TIM_IC_Stop_IT(&Input_Handle, TIM_CHANNEL_1);
/* Deinitialize the TIM14 peripheral registers to their default reset values */
HAL_TIM_IC_DeInit(&Input_Handle);
return uwLsiFreq/*0*/;
}
