/*
 * led-interrupt.c
 *
 *  Created on: Oct 3, 2018
 *      Author: corrado
 */

#include "stm32_unict_lib.h"

int main()
{
	// LED at PC3
	GPIO_init(GPIOC);
	GPIO_config_output(GPIOC, 3);
	// pushbutton Y (PB4)
	GPIO_init(GPIOB);
	GPIO_config_input(GPIOB, 4);
	GPIO_config_EXTI(GPIOB, EXTI4);
	EXTI_enable(EXTI4, FALLING_EDGE);
	for (;;) { } // do nothing
	return 0;
}

void EXTI4_IRQHandler(void)
{
	if (EXTI_isset(EXTI4)) {
			GPIO_toggle(GPIOC, 3);
			EXTI_clear(EXTI4);
	}
}