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按下按键之后，打印一句话------＞三个按键需要实现

news 2025/8/23 10:53:04

main.c:

#include "key.h"

extern void printf(const char *fmt, ...);

void delay_ms(int ms){

int i,j;

for(i = 0; i < ms;i++)

for (j = 0; j < 1800; j++);}

int main(){

//key1键盘

//EXIT控制器初始化

void PF9_exti_init();

//GICD控制器初始化

void PF9_gicd_init();

//gicc控制器初始化

void PF9_gicc_init();

//key2键盘

//EXIT控制器初始化

void PF7_exti_init();

//GICD控制器初始化

void PF7_gicd_init();

//gicc控制器初始化

void PF7_gicc_init();

//key3键盘

//EXIT控制器初始化

void PF8_exti_init();

//GICD控制器初始化

void PF8_gicd_init();

//gicc控制器初始化

void PH8_gicc_init();

while(1) {

}

return 0;

}

key.h:

#ifndef __KEY_h__

#define __KEY_h__

#include "stm32mp1xx_gpio.h"

#include "stm32mp1xx_exti.h"

#include "stm32mp1xx_rcc.h"

#include "stm32mp1xx_gic.h"

//key1键盘

//EXIT控制器初始化

void PF9_exti_init();

//GICD控制器初始化

void PF9_gicd_init();

//gicc控制器初始化

void PF9_gicc_init();

//key2键盘

//EXIT控制器初始化

void PF7_exti_init();

//GICD控制器初始化

void PF7_gicd_init();

//gicc控制器初始化

void PF7_gicc_init();

//key3键盘

//EXIT控制器初始化

void PF8_exti_init();

//GICD控制器初始化

void PF8_gicd_init();

//gicc控制器初始化

void PH8_gicc_init();

#endif

key.c:

#include "key.h"

//EXIT控制器初始化
void PF9_exit_init()
{
   //------RCC章节-----------
   RCC->MP_AHB4ENSETR |=0x01 << 5;
   //-------输入模式--------------
   //key1
   GPIOF->MODER |=(~(0x03 << 18));

   //初始化EXIT
   EXTI->EXTICR3 &=(~(0xff << 8));
   EXTI->EXTICR3 |=(0x05 << 8);
   //编写事件
   EXTI->FTSR1 |= 0x01 << 9;
   EXTI->C1IMR1 |= 0x01 << 9;
}

void PF7_exit_init()
{
   //------RCC章节-----------
   RCC->MP_AHB4ENSETR |=0x01 << 5;
   //-------输入模式--------------
   //key1
   GPIOF->MODER |=(~(0x03 << 14));

   //初始化EXIT
   EXTI->EXTICR3 &=(~(0xff << 24));
   EXTI->EXTICR3 |=(0x05 << 24);
   //编写事件
   EXTI->FTSR1 |= 0x01 << 7;
   EXTI->C1IMR1 |= 0x01 << 7;
}
void PF8_exit_init()
{
   //------RCC章节-----------
   RCC->MP_AHB4ENSETR |=0x01 << 5;
   //-------输入模式--------------
   //key1
   GPIOF->MODER |=(~(0x03 << 16));

   //初始化EXIT
   EXTI->EXTICR3 |=(0x05 << 0);
   //编写事件
   EXTI->FTSR1 |= 0x01 << 8;
   EXTI->C1IMR1 |= 0x01 << 8;
}

//GICD控制器初始化
void PF9_gicd_init()
{
GICD->CTRL |=0x01 << 0;

GICD->ISENABLER[3] |=0x01 << 3;

GICD->IPRIORITYR[24] &= (~(0x1f << 27));

GICD->ITARGETSR[24] &= (~(0x3 << 24));
GICD->ITARGETSR[24] |= 0x1 << 24;
}

//GICD控制器初始化
void PF7_gicd_init()
{
GICD->CTRL |=0x01 << 0;

GICD->ISENABLER[3] |=0x01 << 3;

GICD->IPRIORITYR[24] |= (0x1f << 11);

GICD->ITARGETSR[24] |= 0x1 << 8;
}

//GICD控制器初始化
void PF8_gicd_init()
{
GICD->CTRL |=0x01 << 0;

GICD->ISENABLER[3] |=0x01 << 2;

GICD->IPRIORITYR[24] |= (0x1f << 19);

GICD->ITARGETSR[24] |= 0x1 << 16;
}

//GICC控制器初始化
void PF9_gicc_init()
{

GICC->CTRL |=0x01 << 0;

GICC->PMR &=(~(0x1f << 3));

GICC->PMR |=(0x1f << 3);
}

//GICC控制器初始化
void PF7_gicc_init()
{

GICC->CTRL |=0x01 << 0;

GICC->PMR |=(0x02 << 2);
}

//GICC控制器初始化
void PF8_gicc_init()
{

GICC->CTRL |=0x01 << 0;

GICC->PMR |=(0x02 << 2);
}

do_irq:

#include "key.h"
extern void printf(const char *fmt, ...);
extern void delay_ms(int ms);
unsigned int i = 0;
void do_irq(void)
{
   unsigned int num =0;
   //获取中断信号
   num=GICC->IAR;
   //判断终端的好坏
   switch(num)
   {
       //99：key1键盘按下
   case 99:
       delay_ms(500);
       printf("key1---------");

EXTI->FPR1 |= (0X1<<9);

GICD->ICPENDR[3] |=(0x01 << 3);
break;

       //97：key2键盘按下
   case 97:
       delay_ms(500);
       printf("key2---------");

EXTI->FPR1 |= (0X1<<7);

       GICD->ICPENDR[3] |=(0x01 << 1);
       break;
       //98：key3键盘按下
   case 98:
       delay_ms(500);
       printf("key3---------");

EXTI->FPR1 |= (0X1<<8);

       GICD->ICPENDR[3] |=(0x01 << 2);
       break;

   default:
       delay_ms(500);
       printf("输入错误，请重新输入！---------");

   }
   //清楚中断状态位
   GICC->EOIR &= (~(0x3ff << 0));
   GICC->EOIR |=num;
}

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