Enable Timer interrupt after generating N pulse

Question

I need to enable a general timer interrupt after generating each pulse in PWM mode. I wrote this program. I will be grateful if you kindly let me know how to enable timer interrupt. This my SPL schematic code:

 void PWMControl(unsigned int Freq){
TIM_TimeBaseInitTypeDef TimeStructureure; 
TIM_OCInitTypeDef TIMOCStructureure; 
 
 TimeStructure.TIM_Prescaler=Prescale;
 TimeStructure.TIM_CounterMode=TIM_CounterMode_Up;
 TimeStructure.TIM_Period=Period;
 TimeStructure.TIM_ClockDivision=TIM_CKD_DIV1;
 TimeStructure.TIM_RepetitionCounter=0;
 TIM_TimeBaseInit(TIM4, &TimeStructure);
 TIM_Cmd(TIM4, ENABLE); 
 
 TIMOCStructure.TIM_OCMode=TIM_OCMode_PWM2;
 TIMOCStructure.TIM_OutputState=TIM_OutputState_Enable;
 TIMOCStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
 TIMOCStructure.TIM_Pulse=Pulse;
 TIM_OC1Init(TIM4, &TIMOCStructure);
 //TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable); 
 TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE); 
 
}

According to this post I need to generate N pulse without/ the least CPU workload. (Max Frequency=1MHz)

• Tagli: Do you have a code for the interrupt service routine?
• A.R.C.: What library are you using? This does not look like the ST HAL drivers.
• John Jin: Thank you, I have updated the post content.
• John Jin: I have added the interrupt code but it doesn't work. It just generate a continuous PWM wave form.
• Tagli: 1 MHz is a high frequency for interrupts. You need to use method 3 from the linked question. You need to chain 2 timers, and enable interrupts in the slave timer so that it can stop the master timer.

Answer 1

Are you using CubeMX?

If yes then you have to first enable it in NVIC after configuring TIM4.

Next, inside your logic you have to enable the timer as HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_1);