I am learning more about FreeRTOS by making a task-based program. My problem comes when initializing and configuring the HAL time sources. I read that it is necessary to choose another HW timer as time base source and leave the Systick for FreeRTOS. In this case I chose TIM10 (Basic Timer) as the HAL time source. When debugging, my program gets stuck inside the HAL_MspInit() to start the low-level hardware. Basically it loops between this function and the TIM1_UP_TIM10_IRQHandler() which contains the line HAL_TIM_IRQHandler(&htim10). I am not sure if there is problem with the low-level hardware or something related with the timer priorities, since the system_clock() function has not run yet at this point.
This is my setup:
- board: STM32F7508-DK
- clock freq: 120 MHz (HSE)
- Timers used: only TIM10 as time base source
- IDE: STM32CubeIDE
Also I clear all the pinout before configuring the system.
Code of the issue:
Main function where the Hal_init() runs:
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();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
Below is the Hal_Init() funtion where everything runs until it gets to the HAL_MspInit(). I have used breakpoints but it never gets to return the HAL_OK value.
HAL_StatusTypeDef HAL_Init(void)
{
/* Configure Instruction cache through ART accelerator */
#if (ART_ACCLERATOR_ENABLE != 0)
__HAL_FLASH_ART_ENABLE();
#endif /* ART_ACCLERATOR_ENABLE */
/* Configure Flash prefetch */
#if (PREFETCH_ENABLE != 0U)
__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
#endif /* PREFETCH_ENABLE */
/* Set Interrupt Group Priority */
HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* Use systick as time base source and configure 1ms tick (default clock after Reset is HSI) */
HAL_InitTick(TICK_INT_PRIORITY);
/* Init the low level hardware */
HAL_MspInit();
/* Return function status */
return HAL_OK;
}
HAL_TIM_HandlerIRQ() (where it seems to get stuck). Here it runs all the events until it gets to the /* TIM commutation event */ and returns to HAL_MspInit() after the first "IF" where it gets the flag... and keeps on doing the same.
void HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)
{
/* Capture compare 1 event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC1) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC1) != RESET)
{
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_CC1);
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_1;
/* Input capture event */
if ((htim->Instance->CCMR1 & TIM_CCMR1_CC1S) != 0x00U)
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->IC_CaptureCallback(htim);
#else
HAL_TIM_IC_CaptureCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
/* Output compare event */
else
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->OC_DelayElapsedCallback(htim);
htim->PWM_PulseFinishedCallback(htim);
#else
HAL_TIM_OC_DelayElapsedCallback(htim);
HAL_TIM_PWM_PulseFinishedCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
}
}
}
/* Capture compare 2 event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC2) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC2) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_CC2);
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_2;
/* Input capture event */
if ((htim->Instance->CCMR1 & TIM_CCMR1_CC2S) != 0x00U)
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->IC_CaptureCallback(htim);
#else
HAL_TIM_IC_CaptureCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
/* Output compare event */
else
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->OC_DelayElapsedCallback(htim);
htim->PWM_PulseFinishedCallback(htim);
#else
HAL_TIM_OC_DelayElapsedCallback(htim);
HAL_TIM_PWM_PulseFinishedCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
}
}
/* Capture compare 3 event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC3) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC3) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_CC3);
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_3;
/* Input capture event */
if ((htim->Instance->CCMR2 & TIM_CCMR2_CC3S) != 0x00U)
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->IC_CaptureCallback(htim);
#else
HAL_TIM_IC_CaptureCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
/* Output compare event */
else
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->OC_DelayElapsedCallback(htim);
htim->PWM_PulseFinishedCallback(htim);
#else
HAL_TIM_OC_DelayElapsedCallback(htim);
HAL_TIM_PWM_PulseFinishedCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
}
}
/* Capture compare 4 event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC4) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC4) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_CC4);
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_4;
/* Input capture event */
if ((htim->Instance->CCMR2 & TIM_CCMR2_CC4S) != 0x00U)
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->IC_CaptureCallback(htim);
#else
HAL_TIM_IC_CaptureCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
/* Output compare event */
else
{
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->OC_DelayElapsedCallback(htim);
htim->PWM_PulseFinishedCallback(htim);
#else
HAL_TIM_OC_DelayElapsedCallback(htim);
HAL_TIM_PWM_PulseFinishedCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
}
}
/* TIM Update event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_UPDATE) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_UPDATE) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDATE);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->PeriodElapsedCallback(htim);
#else
HAL_TIM_PeriodElapsedCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
}
/* TIM Break input event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_BREAK);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->BreakCallback(htim);
#else
HAL_TIMEx_BreakCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
}
/* TIM Break2 input event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK2) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) != RESET)
{
__HAL_TIM_CLEAR_FLAG(htim, TIM_FLAG_BREAK2);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->Break2Callback(htim);
#else
HAL_TIMEx_Break2Callback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
}
/* TIM Trigger detection event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_TRIGGER) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_TRIGGER) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_IT_TRIGGER);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->TriggerCallback(htim);
#else
HAL_TIM_TriggerCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
}
/* TIM commutation event */
if (__HAL_TIM_GET_FLAG(htim, TIM_FLAG_COM) != RESET)
{
if (__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_COM) != RESET)
{
__HAL_TIM_CLEAR_IT(htim, TIM_FLAG_COM);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1)
htim->CommutationCallback(htim);
#else
HAL_TIMEx_CommutCallback(htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
}
}
}
Please help me understand the issue.
