I am trying to drive a lc resonator from a h bridge. Frequency of the resonator changes when inductor is loaded.
TIM15 creates the complimentary PWM for the H bridge. I need TIM2 to read the new frequency of the resonator so i can adjust the PWM frequency of TIM15. TIM2 will be reading a square wave.
I tried this guide(and every other one I could find). I tried DMA. I tried interrupts. I even put a breakpoint inside the HAL_TIM_IC_CaptureCallback. It didn't even get triggered.
https://community.st.com/t5/stm32-mcus/how-to-use-the-input-capture-feature/ta-p/704161
At this point i am not sure if my code is wrong or if there is an actual problem with the board.
Would it be possible for someone to send me a code for TIM2 interrupt that is confirmed working or test my code on a stm32 that is confirmed good?
I am questioning my sanity. The board programs and debugs just fine. cubeide or cubeprogrammer gives no error codes.
here is all the edits I have done to my main.c file
/* USER CODE BEGIN 0 */
uint32_t H_freq;
uint32_t ARR_tim15;
uint32_t frequency;
uint32_t captureValue = 0;
uint32_t previousCaptureValue = 0;
uint32_t frequency = 0;
float freq;
float duty;
float TIMER_CLOCK_FREQ;
/* USER CODE END 0 */
/* USER CODE BEGIN 1 */
void pwm_frequency_set() //H bridge pwm frequency
{
ARR_tim15=80000000/H_freq;
TIM15->ARR = ARR_tim15; // counter period for timer 15
TIM15->CCR1 = ARR_tim15/2; // duty cycle for timer 15
return;
}
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) {
H_freq = 20000;
pwm_frequency_set();
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1) {
captureValue = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
frequency = HAL_RCC_GetPCLK1Freq() / (captureValue - previousCaptureValue);
previousCaptureValue = captureValue;
}
}
/* USER CODE END 1 */
/* USER CODE BEGIN 2 */
HAL_TIM_PWM_Start(&htim15, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim15, TIM_CHANNEL_1);
HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1); // Primary channel - rising edge
HAL_TIM_IC_Start(&htim2, TIM_CHANNEL_2); // Secondary channel - falling edge
/* USER CODE END 2 */
/* USER CODE BEGIN WHILE */
H_freq = 10000;
pwm_frequency_set();
while (1)
{
/* USER CODE END WHILE */
