Hi,
I am trying to check if a button is pressed for 3s continuously using a timer which is started through an interrupt. The code for the same is attached below. The issue I am facing is the interrupt is immediately called when I press the button after reset, but it works fine for the consecutive times.
void EXTI1_IRQHandler(void) {
if (__HAL_GPIO_EXTI_GET_IT(RESET_Pin) != RESET) {
__HAL_GPIO_EXTI_CLEAR_IT(RESET_Pin); // Clear the interrupt flag
if( HAL_GPIO_ReadPin(RESET_GPIO_Port, RESET_Pin) == 0){ //FALLING Edge
HAL_TIM_Base_Stop_IT(&htim2);
}else{ //RISING EDGE
if(!(TIM2->CR1 & TIM_CR1_CEN)){
__HAL_TIM_SET_COUNTER(&htim2, 0);
HAL_TIM_Base_Start_IT(&htim2);
}
}
}
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
/* USER CODE BEGIN Callback 0 */
/* USER CODE END Callback 0 */
if (htim->Instance == TIM8) {
HAL_IncTick();
}
/* USER CODE BEGIN Callback 1 */
if(htim->Instance == TIM2){
HAL_TIM_Base_Stop_IT(htim);
osSemaphoreRelease(task_semaphore);
return;
}
/* USER CODE END Callback 1 */
}
Things I have already tried:
- Set the counter to zero at the when initializing it.
- Calling stop before starting the timer
Thanks in advance!
