效果圖：

源碼：

#include "key.h"
void hal_key1_rcc_gpio_init()
{// 使能GPIOF組RCC->MP_AHB4ENSETR |= (0x1 << 5);// 設置引腳位輸入模式GPIOF->MODER &= (~(0X3 << 18));GPIOF->MODER &= (~(0X3 << 16));GPIOF->MODER &= (~(0X3 << 14));
}void hal_key1_exti_init()
{// 使能EXTIEXTI->EXTICR3 &= (~(0XFF << 8));EXTI->EXTICR3 |= (0X5 << 8);// 使能EXTIEXTI->EXTICR2 &= (~(0XFF << 24));EXTI->EXTICR2 |= (0X5 << 24);// 使能EXTIEXTI->EXTICR3 &= (~(0XFF));EXTI->EXTICR3 |= (0X5);// 設置為下降沿觸發EXTI->FTSR1 |= (0X7 << 7);// 設置不屏蔽EXTI->C1IMR1 |= (0X7 << 7);// 清除中斷掛起標志位EXTI->FPR1 |= (0X1 << 9);
}void hal_key1_gic_init()
{/*--------GCID---------*/// gicd組使能GICD->CTRL |= (0X1);// 對應中斷組使能GICD->ISENABLER[3] |= (0X1 << 3);GICD->ISENABLER[3] |= (0X1 << 2);GICD->ISENABLER[3] |= (0X1 << 1);// 中斷優先級GICD->IPRIORITYR[24] &= (~(0X1F << 27));GICD->IPRIORITYR[24] |= (0X0A << 27);// 中斷優先級GICD->IPRIORITYR[24] &= (~(0X1F << 11));GICD->IPRIORITYR[24] |= (0X0A << 11);// 中斷優先級GICD->IPRIORITYR[24] &= (~(0X1F << 19));GICD->IPRIORITYR[24] |= (0X0A << 19);// 中斷分配給哪個cpuGICD->ITARGETSR[24] &= (~(0X3 << 24));GICD->ITARGETSR[24] |= (0X1 << 24);// 中斷分配給哪個cpuGICD->ITARGETSR[24] &= (~(0X3 << 8));GICD->ITARGETSR[24] |= (0X1 << 8);// 中斷分配給哪個cpuGICD->ITARGETSR[24] &= (~(0X3 << 16));GICD->ITARGETSR[24] |= (0X1 << 16);// 清除掛起位標志// GICD->ICPENDR[2] |= (0X1 << 3);// GICD->ICPENDR[1] |= (0X1 << 1);// GICD->ICPENDR[2] |= (0X1 << 2);/*--------GICC---------*/GICC->CTRL |= (0X1);GICC->PMR &= (~(0X1F << 3));GICC->PMR |= (0X0F << 3);
}

#include "key.h"
extern void printf(const char *fmt, ...);
unsigned int i = 0;
void do_irq(void) // 中斷處理函數
{// printf("have someone asshole interrupt!\n");unsigned int irq_number = GICC->IAR & 0x3FF;// 根據中斷號調用對應的中斷處理函數switch (irq_number){case 99:printf("key1 down!!!key1 ID = %d\n", irq_number);EXTI->FPR1 |= (0X1 << 9);GICD->ICPENDR[3] |= (0X1 << 3);GICC->EOIR = irq_number;break;case 98:printf("key3 down!!!key3 ID = %d\n", irq_number);EXTI->FPR1 |= (0X1 << 8);GICD->ICPENDR[3] |= (0X1 << 2);GICC->EOIR = irq_number;break;case 97:printf("key2 down!!!key2 ID = %d\n", irq_number);EXTI->FPR1 |= (0X1 << 7);GICD->ICPENDR[3] |= (0X1 << 1);GICC->EOIR = irq_number;break;default:// 處理其他中斷或錯誤情況break;}// 清除中斷號// EXTI->FPR1 |= (0X1 << 9);//GICD->ICPENDR[3] |= (0X1 << 3);//GICC->EOIR = irq_number;
}

#include "key.h"int main()
{hal_key1_exti_init();hal_key1_gic_init();hal_key1_rcc_gpio_init();while (1){}return 0;
}

#ifndef __KEY_H__
#define __KEY_H__
#include "stm32mp1xx_gic.h"
#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_rcc.h"void hal_key1_rcc_gpio_init();void hal_key1_exti_init();void hal_key1_gic_init();#endif