ARM作业2

.设置按键中断，按键1按下，LED亮，再按一次，灭

按键2按下，蜂鸣器响。再按一次，不响

按键3按下，风扇转，再按一次，风扇停

头文件key_it.h

#ifndef __KEY_IT_H__
#define __KEY_IT_H__
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gic.h"
void key_it_config();
void key3_it_config();
void all_led_init();
void buzzer_init();
void fan_init();
#endif

源文件key_it.c

#include"key_it.h"

void key3_it_config()
{
    //RCC使能GPIOF时钟
    RCC->MP_AHB4ENSETR |= (0x1MODER &= (~(0x3EXTICR3 &=(~(0xFFEXTICR3 |= (0x5FTSR1 |= (0x1C1IMR1 |= (0x1ISENABLER[3] |= (0X1IPRIORITYR[24] &= (~(0X1FITARGETSR[24]  &= (~(0X3ITARGETSR[24] |= (0X1MP_AHB4ENSETR |= (0x1MODER &= (~(0x3MODER &= (~(0x3MODER &= (~(0x3EXTICR2 &=(~(0xFFEXTICR2 |= (0x5EXTICR3 &=(~(0xFFEXTICR3 |= (0x5EXTICR3 &=(~(0xFFEXTICR3 |= (0x5FTSR1 |= (0x1FTSR服务器托管网1 |= (0x1FTSR1 |= (0x1C1IMR1 |= (0x1C1IMR1 |= (0x1C1IMR1 |= (0x1ISENABLER[3] |= (0X1ISENABLER[3] |= (0X1ISENABLER[3] |= (0X1IPRIORITYR[24] &= (~(0X1FIPRIORITYR[24] &= (~(0X1FIPRIORITYR[24] &= (~(0X1FITARGETSR[24]  &= (~(0X3ITARGETSR[24] |= (0X1ITARGETSR[24]  &= (~(0X3ITARGETSR[24] |= (0X1ITARGETSR[24]  &= (~(0X3ITARGETSR[24] |= (0X1CTRL |= 0X1;
    //设置中断优先级掩码GICC_PMR
    GICC->PMR |= (0x1FCTRL |= 0X1;    
}

void all_led_init()
{
    //RCC使能
    RCC->MP_AHB4ENSETR |= (0x3MODER &= (~(0X3MODER |= (0X1OTYPER &= (~(0X1OSPEEDR &= (~(0X3PUPDR &= (~(0X3MP_AHB4ENSETR |= (0x1MODER &= (~(0X3MODER |= (0X1OTYPER &= (~(0X1OSPEEDR &= (~(0X3PUPDR &= (~(0X3MP_AHB4ENSETR  |= (0x1MODER &= (~(0X3MODER |= (0X1OTYPER &= (~(0X1OSPEEDR &= (~(0X3PUPDR &= (~(0X3

do_irq.c

#include "key_it.h"
extern void printf(const char *fmt, ...);
unsigned int i = 0;
void do_irq(void) 
{
    int irqno;//保存中断号
    irqno=GICC->IAR & 0X3FF;
    switch(irqno)
    {
        case 99://key1
            //按键1中断处理
            printf("KEY1 INTn");
			G服务器托管网PIOE->ODR ^=(0X1ICPENDR[3] |= (0x1FPR1 |= (0x1ODR ^=(0x1ICPENDR[3] |= (0x1FPR1 |= (0x1ODR ^=(0x1ICPENDR[3] |= (0x1FPR1 |= (0x1EOIR =irqno;
}

main.c

#include "uart.h"
#include "key_it.h"
int main()
{
	all_led_init();
    uart4_init();//串口初始化
    //中断初始化
    key_it_config();
    key3_it_config();
	buzzer_init();
	fan_init();
    while(1)
    {
        //保证主程序不结束
    }
    return 0;
}

现象

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