CODE
void Tim4Init(void)
{
NVIC_SetPriority(TIM4_IRQn, 1);
NVIC_EnableIRQ(TIM4_IRQn);
RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;
TIM4->PSC = 0x8CA0; //72Mhz/36000 = 2ms
//TIM4->ARR = 1000; //reload every 200ms
TIM4->CCMR1 &= ~TIM_CCMR1_OC1M; //MODE 000 - capture/comp for time events
TIM4->CCMR1 &= ~TIM_CCMR1_OC2M;
TIM4->CCMR2 &= ~TIM_CCMR2_OC3M;
TIM4->DIER |= (TIM_DIER_CC1IE | TIM_DIER_CC2IE| TIM_DIER_CC3IE);
TIM4->CCR1 = 500; //1s
TIM4->CCR2 = 1000; //2s
TIM4->CCR3 = 1500; //3s
TIM4->CR1 |= TIM_CR1_CEN;
}
{
NVIC_SetPriority(TIM4_IRQn, 1);
NVIC_EnableIRQ(TIM4_IRQn);
RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;
TIM4->PSC = 0x8CA0; //72Mhz/36000 = 2ms
//TIM4->ARR = 1000; //reload every 200ms
TIM4->CCMR1 &= ~TIM_CCMR1_OC1M; //MODE 000 - capture/comp for time events
TIM4->CCMR1 &= ~TIM_CCMR1_OC2M;
TIM4->CCMR2 &= ~TIM_CCMR2_OC3M;
TIM4->DIER |= (TIM_DIER_CC1IE | TIM_DIER_CC2IE| TIM_DIER_CC3IE);
TIM4->CCR1 = 500; //1s
TIM4->CCR2 = 1000; //2s
TIM4->CCR3 = 1500; //3s
TIM4->CR1 |= TIM_CR1_CEN;
}
Проверяем
CODE
void TIM4_IRQHandler (void)
{
if(TIM4->SR & TIM_SR_CC1IF)
{
TIM4->SR &= ~TIM_SR_CC1IF;
UsartSendString("CC1 Int\r");
}
if(TIM4->SR & TIM_SR_CC2IF)
{
TIM4->SR &= ~TIM_SR_CC2IF;
UsartSendString("CC2 Int\r");
}
if(TIM4->SR & TIM_SR_CC3IF)
{
TIM4->SR &= ~TIM_SR_CC3IF;
UsartSendString("CC3 Int\r");
}
}
{
if(TIM4->SR & TIM_SR_CC1IF)
{
TIM4->SR &= ~TIM_SR_CC1IF;
UsartSendString("CC1 Int\r");
}
if(TIM4->SR & TIM_SR_CC2IF)
{
TIM4->SR &= ~TIM_SR_CC2IF;
UsartSendString("CC2 Int\r");
}
if(TIM4->SR & TIM_SR_CC3IF)
{
TIM4->SR &= ~TIM_SR_CC3IF;
UsartSendString("CC3 Int\r");
}
}
По идее каждую секунду я должен видеть capture/compare event. На самом деле таймер доходит до TIM4->ARR и только потом происходят интерапты. Как я понимаю таймер должен досчитать до TIM4->CCR1 - CCR3 регтстра и сгенерировать интерапт без всякой связи с TIM4->ARR.
