How to implement Stm32f0 output compare

[jsaun]

This is my code. It must be generete output compare interrupt when UPEventCount == DelayloopCount then, TIM_IT_CCR2 interrupt must be occur when CNT = my value. But CCR2 interrupt occur before CNT not reach my value. I looked for a long time but couldn't find the solution. Thanks for now..

void config(){
 
 TIM_ICInitStructure.TIM_Channel = TIM_Channel_1; //TIM_Channel_3
 
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
 
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
 
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
 
  TIM_ICInitStructure.TIM_ICFilter = 0x0;
 
  TIM_ICInit(ExternalOSCTimer, &TIM_ICInitStructure);
 
 
 
 
 
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_UP_TRG_COM_IRQn;
 
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
 
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 
  NVIC_Init(&NVIC_InitStructure);
 
 
 
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle ;
 
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_High
 
  TIM_OC2Init(TIM1, &TIM_OCInitStructure);
 
 
 
  TIM1->CCER |= TIM_CCER_CC2E ;
 
 
 
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Disable);
 
 
 
  TIM1->CR2 &= (uint16_t)(~(TIM_CR1_DIR | TIM_CR1_CMS | TIM_CR1_CKD)); 
 
  TIM1->CR2 &= 0XFF7F; 
 
  TIM1->ARR = 0xFFFFFFFF;
 
  TIM1->PSC = 0x0000; 
 
  TIM1->SMCR |= (uint16_t)(TIM_TS_TI1FP1 | TIM_SMCR_SMS); // external mode 1
 
TIM_ITConfig(TIM1, TIM_IT_Update, DISABLE);
 
TIM1->CR1 &= (uint16_t)(~((uint16_t)TIM_CR1_CEN));
 
 
 
}
 
 
 
void TIM1_BRK_UP_TRG_COM_IRQHandler(){
 
UPEventCount++ ;
 
TIM_ClearITPendingBit(TIM1,TIM_IT_Update) ;
 
 
 
	if(UPEventCount == DelayloopCount){
 
 
 
	capture = TIM_GetCapture2(ExternalOSCTimer);
 
	TIM_SetCompare2(TIM1, capture + DelayOverFlow);
 
 TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE);//enable interrupt
 
 
 
	}
 
 
 
if (TIM_GetITStatus(TIM1, TIM_IT_CC2) != RESET){
 
 
 
 GPIOF->ODR ^= GPIO_Pin_7;
 
}
 
}

[Javier1]

Use the code format in your text so we dont die trying to read you wall of text

[gbm]

TIM1 has >1 interrupt vector - for compare/capture use TIM1_CC_IRQHandler and enable TIM1_CC_IRQn;

[jsaun]

Sorry 😅

[jsaun]

That is not working