按键中断

key_it.c

#include"key_it.h"
 
void key3_it_config()
{
	RCC -> MP_AHB4ENSETR |= (0x1 << 5);
 
	GPIOF -> MODER &= (~(0x3 << 16));
 
	EXTI -> EXTICR3 &= (~(0xFF << 0));
 
	EXTI -> EXTICR3 |= (0x5 << 0);
 
	EXTI -> FTSR1 |= (0x1 << 8);
 
	EXTI -> C1IMR1 |= (0x1 << 8);
 
	GICD -> ISENABLER[3] |= (0x1 << 2);
 
	GICD -> IPRIORITYR[24] &= (~(0x1F << 19));
 
	GICD -> ITARGETSR[24] &= (~(0x3 << 16));
 
	GICD -> ITARGETSR[24] |= (0x1 << 16);
}
 
void key_it_config()
{
	RCC -> MP_AHB4ENSETR |= (0x1 << 5);
 
	GPIOF -> MODER &= (~(0x3 << 18));
 
	GPIOF -> MODER &=(~(0x3 << 14));
 
	EXTI -> EXTICR2 &= (~(0xFF << 24));
	EXTI -> EXTICR2 |= (0x5 << 24);
	
	EXTI -> EXTICR3 &= (~(0xFF << 8));
	EXTI -> EXTICR3 |= (0x5 << 8);
 
	EXTI -> FTSR1 |= (0x1 << 7);
 
	EXTI -> FTSR1 |= (0x1 << 9);
 
	EXTI -> C1IMR1 |= (0x1 << 7);
 
	EXTI -> C1IMR1 |= (0x1 << 9);
 
	GICD -> ISENABLER[3] |= (0x1 << 1);
 
	GICD -> ISENABLER[3] |= (0x1 << 3);
 
	GICD -> IPRIORITYR[24] &= (~(0x1F << 11));
 
	GICD -> IPRIORITYR[24] &= (~(0x1F << 27));
 
	GICD -> ITARGETSR[24] &= (~(0x3 << 8));
	GICD -> ITARGETSR[24] |= (0x1 << 8);
 
	GICD -> ITARGETSR[24] &= (~(0x3 << 24));
	GICD -> ITARGETSR[24] |= (0x1 << 24);
 
	GICC -> CTRL |= 0x1;
 
	GICC -> PMR |= (0x1F << 3); 
 
	GICC -> CTRL |= 0x1;
}
 
 
void all_led_init()
{
	RCC -> MP_AHB4ENSETR |= (0x3 << 4);
 
	GPIOE -> MODER &= (~(0x3 << 20));
	GPIOE -> MODER |= (0x1 << 20);
	GPIOF -> MODER &= (~(0x3 << 20));
	GPIOF -> MODER |= (0x1 << 20);
	GPIOE -> MODER &= (~(0x3 << 16));
	GPIOE -> MODER |= (0x1 << 16);
 
	GPIOE -> MODER &= (~(0x1 << 10));
	GPIOF -> MODER &= (~(0x1 << 10));
	GPIOE -> MODER &= (~(0x1 << 8));
 
	GPIOE -> OSPEEDR &= (~(0x3 << 20));
	GPIOF -> OSPEEDR &= (~(0x3 << 20));
	GPIOE -> OSPEEDR &= (~(0x3 << 16));
 
	GPIOE -> PUPDR &= (~(0x3 << 20));
	GPIOF -> PUPDR &= (~(0x3 << 20));
	GPIOE -> PUPDR &= (~(0x3 << 16));
}
 
 
void beep_init()
{
	RCC -> MP_AHB4ENSETR |= (0x1 << 1);
 
	GPIOB -> MODER &= (~(0x3 << 12));
	GPIOB -> MODER |= (0x1 << 12);
 
	GPIOB -> MODER |= (0x1 << 6);
 
	GPIOB -> OSPEEDR &= (~(0x3 << 12));
 
	GPIOB -> PUPDR &= (~(0x3 << 12));
}
 
 
void fan_init()
{
	RCC -> MP_AHB4ENSETR |= (0x1 << 4);
 
	GPIOE -> MODER &= (~(0x3 << 18));
	GPIOE -> MODER |= (0x1 << 18);
 
	GPIOE -> MODER |= (0x1 << 9);
 
	GPIOE -> OSPEEDR &= (~(0x3 << 18));
 
	GPIOE -> PUPDR &= (~(0x3 << 18));
}
 

do_irq.c

#include"key_it.h"
 
extern void printf(const char *fmt, ...);
unsigned int i = 0;
 
 
void deley(int ms)
{
	for(int i = 0; i < ms; i++)
	{
		for(int j = 0; j < 2000; j++);
	}
}
 
 
void do_irq(void) 
{
	int i = 0,j = 0,k = 0;
	int irqno;
	printf("%d\n",irqno);
	irqno = GICC -> IAR & 0x3FF;
	switch(irqno)
	{
	case 99:
		if(i == 0)
		{
			GPIOE -> ODR |= (0x1 << 10);
			GPIOF -> ODR |= (0x1 << 10);
			GPIOE -> ODR |= (0x1 << 8);
			i = 1;
		}
		else
		{
			GPIOE -> ODR &= (~(0x1 << 10));
			GPIOF -> ODR &= (~(0x1 << 10));
			GPIOE -> ODR &= (~(0x1 << 8));
			i = 0;
		}
		printf("KEY1\n");
		GICD -> ICPENDR[3] |= (0x1 << 3);
		EXTI -> FPR1 |= (0x1 << 9);
		break;
	case 97:
		if(j == 0)
		{
			GPIOB -> ODR |= (0x1 << 6);
			j = 1;
		}
		else
		{
			GPIOB -> ODR &= (~(0x1 << 7));
			j = 0;
		}
		printf("KEY2\n");
		GICD -> ICPENDR[3] |= (0x1 << 1);
		EXTI -> FPR1 |= (0x1 << 7);
		break;
	case 98:
		if(k == 0)
		{
			GPIOE -> ODR |= (0x1 << 9);
			k = 1;
		}
		else
		{
			GPIOE -> ODR &= (~(0x1 << 9));
			k = 0;
		}
		printf("KEY3\n");
		GICD -> ICPENDR[3] |= (0x1 << 2);
		EXTI -> FPR1 |= (0x1 << 8);
		break;
	}
	GICC -> EOIR = irqno;
}

main.c

#include "key_it.h"
 
int main()
{
	all_led_init();
	key3_it_config();
	key_it_config();
	fan_init();
	beep_init();
	while(1)
	{
 
	}
	return 0;
}