Posted on June 24, 2014 at 12:06This is my program to control TIMER2 interrupt but it doesn't jump into interrupt function. How can I fix this problems?????
I used startup_stm32f4xx.s , set clock for timer2, enable timer2 interrupt in NVIC register.
/************************************************************/
void TIM2_IRQHandler(void){
if(timer2->TIMx_SR & 0x1){
gpio_toggle_off(gpio_A,GPIO_Pin_1);
number_display(gpio_D,number0);
}
timer2->TIMx_SR=0x0;
}
__declspec(noreturn) void main(void)
{
gpio_setlock(rcc,GPIOD_CLOCK); /*PORT-A enable*/
gpio_setlock(rcc,GPIOA_CLOCK); /*PORT-B enable*/
timer_setlock(rcc,TIMER_2); /* TIMER2 enable*/
//timer_interrupt(timer2,interrupts);
NVIC->ISER[0]|= 1<<(TIM2_IRQn); // enable timer_interrupt =28
timer2->TIMx_PSC =41999; // prescaler
timer2->TIMx_DIER |=0x01; // enable update interrupt
timer2->TIMx_ARR =1999; // counting number
timer2->TIMx_CR1 |=0x90; // auto reload, count down
timer2->TIMx_CR1 |=0x01; // enable counter
timer2->TIMx_EGR =0x01; // update generation
while(1);
}
/***************************************************************/
#stm32f4 #discovery
