/**
* @brief Measure the LSI frequency using timer IC1 and update the calibration registers.
* @note It is recommended to use a timer clock frequency of at least 10MHz in order
* to obtain a better in the LSI frequency measurement.
* @param None
* @retval None
*/
uint32_t LSIMeasurment(void)
{
uint32_t lsi_freq_hz = 0x0;
uint32_t fmaster = 0x0;
uint16_t ICValue1 = 0x0;
uint16_t ICValue2 = 0x0;
/* Get master frequency */
fmaster = CLK_GetClockFreq();
/* Enable the LSI measurement: LSI clock connected to timer Input Capture 1 */
AWU->CSR |= AWU_CSR_MSR;
/* Measure the LSI frequency with TIMER Input Capture 1 */
/* Capture only every 8 events!!! */
/* Enable capture of TI1 */
TIM3_ICInit(TIM3_CHANNEL_1, TIM3_ICPOLARITY_RISING, TIM3_ICSELECTION_DIRECTTI, TIM3_ICPSC_DIV8, 0);
/* Enable TIM3 */
TIM3_Cmd(ENABLE);
/* wait a capture on cc1 */
while ((TIM3->SR1 & TIM3_FLAG_CC1) != TIM3_FLAG_CC1);
/* Get CCR1 value*/
ICValue1 = TIM3_GetCapture1();
TIM3_ClearFlag(TIM3_FLAG_CC1);
/* wait a capture on cc1 */
while ((TIM3->SR1 & TIM3_FLAG_CC1) != TIM3_FLAG_CC1);
/* Get CCR1 value*/
ICValue2 = TIM3_GetCapture1();
TIM3_ClearFlag(TIM3_FLAG_CC1);
/* Disable IC1 input capture */
TIM3->CCER1 &= (uint8_t)(~TIM3_CCER1_CC1E);
/* Disable timer3 */
TIM3_Cmd(DISABLE);
/* Compute LSI clock frequency */
lsi_freq_hz = (8 * fmaster) / (ICValue2 - ICValue1);
/* Disable the LSI measurement: LSI clock disconnected from timer Input Capture 1 */
AWU->CSR &= (uint8_t)(~AWU_CSR_MSR);
return (lsi_freq_hz);
}
void _Device_Setting_Timer3_Enable(uint8_t enable)
{
if(enable){
/* Enable TIM3 clock */
CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE);
/* Time Base configuration */
TIM3_TimeBaseInit(TIM3_PRESCALER, TIM3_CounterMode_Up, TIM3_PERIOD);
/* Enable update interrupt */
TIM3_ITConfig(TIM3_IT_Update, ENABLE);
/* Enable TIM3 */
TIM3_Cmd(ENABLE);
}else{
/* Enable TIM3 clock */
CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, DISABLE);
/* Enable update interrupt */
TIM3_ITConfig(TIM3_IT_Update, DISABLE);
/* Enable TIM3 */
TIM3_Cmd(DISABLE);
/* Cleat Interrupt Pending bit */
TIM3_ClearITPendingBit(TIM3_IT_Update);
}
}
//Delay function Initialization
void Delay_Init(void)
{
//Clear bits
TIM3_DeInit();
//Peripetial Initialization
TIM3_TimeBaseInit(TIM3_PRESCALER_16, 999);
//Enable Periphs
TIM3_Cmd(ENABLE);
//Interrupt configuration
TIM3_ITConfig(TIM3_IT_UPDATE, ENABLE);
#ifndef __MODBUS_EN
#define __DELAY_EN
enableInterrupts();
#endif
}
void Config()
{
//System clock at power up is HSI/8 = 16MHz/8 = 2MHz
//CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); //set HSI/4 = 4MHz SysClk to Core and Memory, minimum clock = 125KHz for CLK_SYSCLKDiv_128
//PWR_PVDCmd(ENABLE); //Power voltage detector and brownout Reset unit supply current 2,6uA
//PWR_PVDLevelConfig(PWR_PVDLevel_2V26); //set Programmable voltage detector threshold to 2,26V
//PWR_GetFlagStatus(PWR_FLAG_PVDOF); //checks whether the specified PWR flag is set or not
//Configure external interrupts - BTN1 and BTN2 presses
EXTI_SetPinSensitivity(EXTI_Pin_0, EXTI_Trigger_Falling_Low);
//EXTI_SetPinSensitivity(EXTI_Pin_4, EXTI_Trigger_Falling_Low);
//EXTI_SelectPort(EXTI_Port_B);
//EXTI_SetHalfPortSelection(EXTI_HalfPort_B_MSB, ENABLE);
/* Input FL IT - onboard Button, external pull-up */
GPIO_Init(BTN1_PORT, BTN1_PIN, GPIO_Mode_In_FL_IT);
GPIO_Init(BTN2_PORT, BTN2_PIN, GPIO_Mode_In_FL_IT);
// Timer 3 Configuration
CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE);
TIM3_TimeBaseInit(TIM3_Prescaler_2, TIM3_CounterMode_Up, 700); // 1MHz timer clock
TIM3_OC1Init(TIM3_OCMode_PWM1,
TIM3_OutputState_Enable,
350,
TIM3_OCPolarity_Low,
TIM3_OCIdleState_Reset);
TIM3_ARRPreloadConfig(ENABLE);
TIM3_OC1PreloadConfig(ENABLE);
TIM3_CtrlPWMOutputs(ENABLE);
TIM3_Cmd(DISABLE);
/* RFM85W pins */
GPIO_Init(RFM_DATA_PORT, RFM_DATA_PIN, GPIO_Mode_Out_PP_Low_Fast);
GPIO_Init(RFM_ON_PORT, RFM_ON_PIN, GPIO_Mode_Out_PP_Low_Fast);
/* Output PP High - bicolor LED to GND */
GPIO_Init(LED_PORT, LED_PIN1, GPIO_Mode_Out_PP_Low_Slow);
GPIO_Init(LED_PORT, LED_PIN2, GPIO_Mode_Out_PP_Low_Slow);
RFM_OFF;
//RFM_DATA(0);
}
static void TIM3_Config(void)
{
/* Enable TIM3 CLK */
CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE);
/* TIM3 Time Base configuration */
TIM3_TimeBaseInit(TIM3_Prescaler_1, TIM3_CounterMode_Up, Period);
/* Channel 2 Configuration in PWM mode */
TIM3_OC2Init(TIM3_OCMode_PWM2, TIM3_OutputState_Enable, Period, TIM3_OCPolarity_Low, TIM3_OCIdleState_Set);
/* TIM3 counter enable */
TIM3_Cmd(ENABLE);
/* Main Output Enable */
TIM3_CtrlPWMOutputs(ENABLE);
/* GPIO TIM3 Channel1 configuration */
GPIO_Init(GPIOD, GPIO_Pin_0, GPIO_Mode_Out_PP_Low_Fast);
}
void TIM3_Config(void)
{
/* TIM3 configuration:
- TIM3CLK is set to 16 MHz, the TIM3 Prescaler is equal to 128 so the TIM3 counter
clock used is 16 MHz / 16= 1 000 000 Hz
- In this example we need to generate a time base equal to 0.5 ms
so TIM3_PERIOD = (0.00005 * 1000000 - 1) = 499 */
/* Time base configuration */
TIM3_TimeBaseInit(TIM3_PRESCALER_16, TIM3_PERIOD);
TIM3_ARRPreloadConfig(ENABLE);
TIM3_ClearFlag(TIM3_FLAG_UPDATE);
/* Enable update interrupt */
TIM3_ITConfig(TIM3_IT_UPDATE, ENABLE);
/* Enable TIM2 */
TIM3_Cmd(ENABLE);
}
void Config()
{
//System clock at power up is HSI/8 = 16MHz/8 = 2MHz
//CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); //set HSI/4 = 4MHz SysClk to Core and Memory, minimum clock = 125KHz for CLK_SYSCLKDiv_128
//PWR_PVDCmd(ENABLE); //Power voltage detector and brownout Reset unit supply current 2,6uA
//PWR_PVDLevelConfig(PWR_PVDLevel_2V26); //set Programmable voltage detector threshold to 2,26V
//PWR_GetFlagStatus(PWR_FLAG_PVDOF); //checks whether the specified PWR flag is set or not
//Configure external interrupts - BTN1 and BTN2 presses
//EXTI_SetPinSensitivity(EXTI_Pin_2, EXTI_Trigger_Falling_Low);
//EXTI_SetPinSensitivity(EXTI_Pin_4, EXTI_Trigger_Falling_Low);
//EXTI_SelectPort(EXTI_Port_B);
//EXTI_SetHalfPortSelection(EXTI_HalfPort_B_MSB, ENABLE);
// Timer 4 Configuration
CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE); // 8bit: used for system periodic flags and timeouts
TIM4_TimeBaseInit(TIM4_Prescaler_16, 125); // Overflow at 1ms, 2MHz/16/125 = 1000
TIM4_ITConfig(TIM4_IT_Update, ENABLE);
TIM4_Cmd(ENABLE);
// Timer 2 Configuration
CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, ENABLE); // 16bit: used for runtime measurement
TIM2_TimeBaseInit(TIM2_Prescaler_2, TIM2_CounterMode_Up, 0xFFFF); // timebase of 1us, 2MHz/2=1M
TIM2_Cmd(ENABLE);
// Timer3 Configuration
CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE);
TIM3_TimeBaseInit(TIM3_Prescaler_2, TIM3_CounterMode_Up, 0xFFFF); // 1us timebase @ 2MHz system clock
TIM3_ICInit(TIM3_Channel_2,
TIM3_ICPolarity_Falling,
TIM3_ICSelection_IndirectTI,
TIM3_ICPSC_Div1,
0);
TIM3_ICInit(TIM3_Channel_1,
TIM3_ICPolarity_Rising,
TIM3_ICSelection_DirectTI,
TIM3_ICPSC_Div1,
0);
TIM3_SelectInputTrigger(TIM3_TRGSelection_TI1FP1);
TIM3_SelectSlaveMode(TIM3_SlaveMode_Reset); // Reset timer on selected trigger signal
TIM3_ITConfig(TIM3_IT_CC1, ENABLE);
TIM3_ITConfig(TIM3_IT_CC2, ENABLE);
TIM3_Cmd(ENABLE);
/* Output PP High - bicolor LED to GND */
GPIO_Init(LED_PORT, LED_PIN1, GPIO_Mode_Out_PP_Low_Slow);
GPIO_Init(LED_PORT, LED_PIN2, GPIO_Mode_Out_PP_Low_Slow);
/* Input pull up no IT - onboard Button, external pull-up */
GPIO_Init(BTN1_PORT, BTN1_PIN, GPIO_Mode_In_FL_No_IT);
/* RFM85W pins */
GPIO_Init(RFM_DATA_PORT, RFM_DATA_PIN, GPIO_Mode_In_FL_No_IT);
/* DEBUG pin */
GPIO_Init(DEBUG_PIN_PORT, DEBUG_PIN_PIN, GPIO_Mode_Out_PP_Low_Fast);
/* H bridge outputs */
GPIO_Init(PMOS_L_PORT, PMOS_L_PIN, GPIO_Mode_Out_PP_High_Fast);
GPIO_Init(PMOS_R_PORT, PMOS_R_PIN, GPIO_Mode_Out_PP_High_Fast);
GPIO_Init(NMOS_L_PORT, NMOS_L_PIN, GPIO_Mode_Out_PP_Low_Fast);
GPIO_Init(NMOS_R_PORT, NMOS_R_PIN, GPIO_Mode_Out_PP_Low_Fast);
}
/**
* @brief Configure TIM1,2,3 peripherals
* @param None
* @retval None
*/
static void TIM_Config(void)
{
/* TIM1 configuration:
- TIM1CLK is set to 2 MHz, the TIM2 Prescaler is equal to 15 so the TIM1 counter
clock used is 2 MHz / (15 + 1) = 125 000 Hz
- TIM1 Channel 1 output frequency = TIM1CLK / (TIM1_PERIOD + 1) * (TIM1_PRESCALER + 1)
= 2 000 000 / 256 * 16 = 488.28 Hz */
/* Time Base configuration */
TIM1_TimeBaseInit(TIM1_PRESCALER, TIM1_CounterMode_Up, TIM1_PERIOD, TIM1_REPETITION_COUNTER);
/* TIM1 Channel 1 Configuration in PWM2 mode */
TIM1_OC1Init(TIM1_OCMode_PWM2, TIM1_OutputState_Enable, TIM1_OutputNState_Disable, TIM1_CCR1_VAL,
TIM1_OCPolarity_Low, TIM1_OCNPolarity_Low, TIM1_OCIdleState_Set, TIM1_OCNIdleState_Set);
/* Master Mode selection: Update event */
TIM1_SelectOutputTrigger(TIM1_TRGOSource_Update);
/* TIM2 configuration:
- TIM2 is connected to TIM1 Update so TIM2CLK is equal to
TIM1 output clock / (TIM1_REPETITION_COUNTER + 1) = 488.28 / 5 = 97.65 Hz
- TIM2 Prescaler is equal to 1 so the TIM2 counter clock used is 97.65 / 1 = 97.65 Hz
- TIM2 Channel 1 output frequency = TIM2CLK / (TIM2_PERIOD + 1) * TIM2_Prescaler
= 97.65 / 3 * 1 = 32.55 Hz */
/* Time Base configuration */
TIM2_TimeBaseInit(TIM2_Prescaler_1, TIM2_CounterMode_Up, TIM2_PERIOD);
TIM2_OC1Init(TIM2_OCMode_PWM2, TIM2_OutputState_Enable, TIM2_CCR1_VAL,
TIM2_OCPolarity_Low, TIM2_OCIdleState_Reset);
/* TIM2 Slave Mode selection: Gated mode */
TIM2_SelectSlaveMode(TIM2_SlaveMode_Gated);
TIM2_SelectInputTrigger(TIM2_TRGSelection_TIM1);
/* TIM3 configuration:
- TIM3 is connected to TIM1 Update so TIM3CLK is equal to
TIM1 output clock / (TIM1_REPETITION_COUNTER + 1) = 488.28 / 5 = 97.65 Hz
- TIM3 Prescaler is equal to 1 so the TIM3 counter clock used is 97.65 / 1 = 97.65 Hz
- TIM3 Channel 1 output frequency = TIM3CLK / (TIM3_PERIOD + 1) * TIM3Prescaler
= 97.65 / 4 * 1 = 24.41 Hz */
/* Time Base configuration */
TIM3_TimeBaseInit(TIM3_Prescaler_1, TIM3_CounterMode_Up, TIM3_PERIOD);
TIM3_OC1Init(TIM3_OCMode_PWM2, TIM3_OutputState_Enable, TIM3_CCR1_VAL,
TIM3_OCPolarity_Low, TIM3_OCIdleState_Reset);
/* TIM3 Slave Mode selection: Gated mode */
TIM3_SelectSlaveMode(TIM3_SlaveMode_Gated);
TIM3_SelectInputTrigger(TIM3_TRGSelection_TIM1);
/* Main Output Enable */
TIM1_CtrlPWMOutputs(ENABLE);
TIM2_CtrlPWMOutputs(ENABLE);
TIM3_CtrlPWMOutputs(ENABLE);
/* TIM2 counter enable */
TIM2_Cmd(ENABLE);
/* TIM3 counter enable */
TIM3_Cmd(ENABLE);
/* TIM1 counter enable */
TIM1_Cmd(ENABLE);
}
void tim3_on(void)
{
TIM3_TimeBaseInit(TIM3_Prescaler_32,TIM3_CounterMode_Up,0xffff);
TIM3_ITConfig(TIM3_IT_CC1,ENABLE);
TIM3_Cmd(ENABLE);
};
