Posted on March 04, 2014 at 23:10 I'm trying to do a pin interrupt (EXTI). My code: // IRQ handler for EXTI0
void
EXTI0_IRQHandler (
void
) {
EXTI->PR = 1UL << 0;
buttonPress = 1;
}
int
main (
void
) {
// some system stuff here ...
GPIO_PortClock (GPIOD,
true
);
GPIO_PinConfigure(GPIOD, 0, GPIO_MODE_INPUT, GPIO_OUTPUT_PUSH_PULL,
GPIO_OUTPUT_SPEED_25MHz, GPIO_PULL_UP);
// EXTI line 0
EXTI_ConfigureLine(0, EXTI_MODE_INTERRUPT, EXTI_TRIGGER_FALLING);
// Port D
EXTI_ConfigurePin(0, EXTI_PIN_PD);
NVIC_EnableIRQ(EXTI0_IRQn);
// ... etc
}
The problem is, whatever port I have on the EXTI_ConfigurePin(), the interruption goes to port A. So the PA0 always triggers the handler, not PD0 or whatever I'm trying to use. The functions I'm using are KEIL. I suppose they are working right, so did I forget some step, or what could it be causing the problem?
#exti #discovery #stm32f4
