Hi, I'm currently trying to set up acceleration and deceleration phases for a stepper motor. For that I'm tryin to change the frequency of the PWM [timer1] ( and the Timer [TIMER1] interrup associated). I'm working on a STM32F407-DISC. I found out the macro __HAL_TIM_SET_AUTORELOAD but I don't see any changes on the period. Here is my interruption that update the period :
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
UNUSED(htim);
if(htim->Instance == TIM1){
// Count the number of times the ISR has been triggered
ticksPassed++;
if(ticks_to_make >= ticksPassed ){
if(useAcceleration){
// Accelerate
if(numberOfTicksMade < ticksToAccelerate){
current_period -= (uint16_t)accelerationPerTickInteger;
__HAL_TIM_SET_AUTORELOAD(&htim1,current_period);
// activate timer
HAL_TIM_Base_Start_IT(&htim1);
//activating the PWM
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
}
else{
// Decelerate
if(ticksPassed > decelerationTick){
current_period += (uint16_t)accelerationPerTickInteger;
__HAL_TIM_SET_AUTORELOAD(&htim1,current_period);
// activate timer
HAL_TIM_Base_Start_IT(&htim1);
//activating the PWM
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
}
}
}
// When the steps have been made, stop the timer interrupt, unless the PERPETUAL_MOTION is activated
}
else{
stepperStop(&htim1,TIM_CHANNEL_1);
}
}
}
