Posted on November 19, 2017 at 00:02Hi,
I'm using a stm32f767ZI microcontroller on NUCLEO eval board in Keil uVision environment. I have huge problems with my first steps beacause of interrupts handling. I have some questions about it and I didnt find my answer in examples.
I expect the program to keep blinking an LED using Timer6 interrupt. This is where my problems begin.
My code:
#include 'stm32f7xx.h' // Device header
#include 'basic_timer.h' // External library (my own)
int diode;
int main ()
{
diode_init();
//***TIMER REGISTERS BELOW:
//***Advanced High Performance Bus enabled for TIM6
RCC -> APB1ENR |= RCC_APB1ENR_TIM6EN;
//***Timer6 counter value?
TIM6-> CNT |= 1;
//Timer6 prescaler
TIM6 -> PSC |= 16000;
//Timer overflow value:
TIM6 -> ARR |= 16000;
//Interrupt Enable:
TIM6->DIER |= TIM_DIER_UIE;
//***TIMER REGISTERS END
//***Below is the part that allow the acces to NVIC
// ***Clear previous interrupt
NVIC_ClearPendingIRQ(TIM6_DAC_IRQn);
//*** Set interrupt priority
NVIC_SetPriority(TIM6_DAC_IRQn, 1);
// ***Enable interrupt
NVIC_EnableIRQ(TIM6_DAC_IRQn);
//***End of NVIC
while(1)
{}}
//Now the interrupt handling:
void TIM6_DAC_IRQHandler (void)
{
static int licznik;
licznik++;
if (licznik > 1000)
{
licznik = 0;
if (diode== 1)
diode = 0;
else
diode = 1;
}
}
My questions are:
*Is my interrupt handling correct
*Do i need to access NVIC with my clear enable etc commands?
*(
//***Timer6 counter value
TIM6-> CNT |= 1): is that added value every tick ?
*Do i have to enable interrupts with '__enable_irq();' command?
