Posted on April 17, 2017 at 17:56Hi, I'm using STM32F103RBTx MCU and I generate my code using CubeMX (v4.20.1).
I need PWM output on 2 Pin: Timer1 - Channel 1 and Timer4 - Channel 4.
These 2 PWM signal is used to control 2 separated DC motors.
I configure them both with Internal Clock and selected the correct PWM Channel output.
In the Configuration Tab, I select the Prescaler & Counter Period for both timers (PWM Mode 1).
Since I need to use the interrupt to toggle some LEDs, so I enable only 'TIM1 Update Interrupt' and 'TIM4 Global Interrupt'.
In my code, after the some initialization functions from HAL. I started each Timer with:
MX_TIM1_Init();
MX_TIM4_Init();
//.......
......//
HAL_TIM_PWM_Start_IT(&htim1, TIM_CHANNEL_1);
HAL_TIM_PWM_Start_IT(&htim4, TIM_CHANNEL_4);
And with the Interrupt Handler, I used:
void HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef *htim){
if (htim -> Instance == htim1.Instance){ //Timer1-CH1
HAL_GPIO_TogglePin(GPIOB, OP_LEDA_Pin); //Toggle LEDA
}else{ //Timer4-CH4
HAL_GPIO_TogglePin(GPIOB, OP_LEDB_Pin); //Toggle LEDB
}
}
With my setup, both DC motors received its correct PWM signal. However, only LEDB toggles, LEDA doesn't.
When I debug, the pointer only stop inside htim4.Instance, which means Timer4 works as expected. But it just doesn't stop inside htim1.Instance. I don't know what I'm missing with Timer1?
Could anyone help me figure out what I did wrong?
Regards,
ReV.
