东营信息网,搜索引擎优化专员,网站建设 团队介绍,威海百姓网免费发布信息网1. 思维导图 2. 实验要求#xff1a; 实现KEY1/LEY2/KE3三个按键#xff0c;中断触发打印一句话#xff0c;并且灯的状态取反 key1 ---- LED3灯状态取反 key2 ---- LED2灯状态取反 key3 ---- LED1灯状态取反
key3.h
#ifndef __KEY3_H__
#define __KEY3_H__#in…1. 思维导图 2. 实验要求 实现KEY1/LEY2/KE3三个按键中断触发打印一句话并且灯的状态取反 key1 ---- LED3灯状态取反 key2 ---- LED2灯状态取反 key3 ---- LED1灯状态取反
key3.h
#ifndef __KEY3_H__
#define __KEY3_H__#include stm32mp1xx_rcc.h
#include stm32mp1xx_gpio.h
#include stm32mp1xx_uart.h
#include stm32mp1xx_gic.h
#include stm32mp1xx_exti.h//key1--PF9
//key2--PF7
//key3--PF8typedef enum
{EXTI1 1,EXTI2,EXTI3,EXTI4,EXTI5,EXTI6,EXTI7,EXTI8,EXTI9,EXTI10,EXTI11,EXTI12,EXTI13,EXTI14,EXTI15
}exti_event_t;//终端触发方式
typedef enum
{RISING_TRIGGER 0,FALLING_TRIGGER
} trigger_t;void hal_exti_init(exti_event_t exti_event,unsigned int ground,trigger_t trigger); //RCC/GPIO/EXTI章节初始化
void hal_gic_init(unsigned int interruptid,unsigned int priority) ; //GIC章节初始化#endif
led.h
#ifndef _LED_H__ //防止头文件重复包含_
#define _LED_H__#include stm32mp1xx_gpio.h//RCC_MP_AHB4ENSETR寄存器封装
#define RCC_MP_AHB4ENSETR (*(volatile unsigned int*)0x50000A28)//对引脚编号进行封装
#define GPIO_PIN_0 0
#define GPIO_PIN_1 1
#define GPIO_PIN_2 2
#define GPIO_PIN_3 3
#define GPIO_PIN_4 4
#define GPIO_PIN_5 5
#define GPIO_PIN_6 6
#define GPIO_PIN_7 7
#define GPIO_PIN_8 8
#define GPIO_PIN_9 9
#define GPIO_PIN_10 10
#define GPIO_PIN_11 11
#define GPIO_PIN_12 12
#define GPIO_PIN_13 13
#define GPIO_PIN_14 14
#define GPIO_PIN_15 15//使用枚举封装MODER寄存器
typedef enum{INPUT, //输入 0OUTPUT, //输出 1ALT, //复用 2ANALOG //模拟 3
}gpio_moder_t;//使用枚举封装OTYPER寄存器
typedef enum{PP, //推挽 0DP //开漏 1
}gpio_otyper_t;//使用枚举封装OSPEEDR寄存器
typedef enum{LOWSPEED, //低速 0MEDSPEED, //中速 1HIGHSPEED, //高速 2VERYHIGHSPEED //快速 3
}gpio_ospeedr_t;//使用枚举封装PURDR寄存器
typedef enum{NO_PUPDR, //禁止上下拉电阻 0PU, //上拉 1PD //下拉 2
}gpio_pupdr_t;//封装初始化结构体
typedef struct{gpio_moder_t moder; //模式寄存器gpio_otyper_t otyper; //输出类型寄存器gpio_ospeedr_t ospeedr; //输出速率寄存器gpio_pupdr_t pupdr; //是否上下电阻寄存器
}gpio_init_t;//使用枚举封装ODR寄存器
typedef enum{GPIO_RESET_T, //熄灭 0GPIO_SET_T //点亮 1
}gpio_status_t;//函数功能:GPIO引脚初始化操作
//参数1:GPIO组号
//参数2:引脚编号
//参数3:初始化内容
void hal_gpio_init(volatile gpio_t * gpiox,unsigned int pin,gpio_init_t* init);//函数功能:GPIO引脚操作,写1点亮,写0熄灭
//参数1:GPIO组号
//参数2:引脚编号
//参数3:写的内容
void hal_gpio_write(volatile gpio_t* gpiox,unsigned int pin,gpio_status_t status);#endif
key3.c
#include key3.h//key1 ----- PF9
//key2 ----- PF7
//key3 ----- PF8
void hal_exti_init(exti_event_t exti_event,unsigned int ground,trigger_t trigger) //RCC/GPIO/EXTI章节初始化
{//RCC章节初始化//使能GPIOF组控制器 ----- RCC_MP_AHB4ENSETR[5] 1RCC-MP_AHB4ENSETR | (0x1 5);//GPIO章节初始化//设置KEY1按键为输入模式 ----- GPIOF_MODER[19:18] 00//设置KEY2按键为输入模式 ----- GPIOF_MODER[15:14] 00//设置KEY3按键为输入模式 ----- GPIOF_MODER[17:16] 00GPIOF-MODER (~(0x3f 14));//EXTI章节初始化//1、EXTI_EXTICRn(n1~4):EXTI external interrupt selection register 外部中断选择寄存器, //设置KEY1按键与EXTI9进行连接,EXTI_EXTICR3[15:8] 0x05,//设置KEY2按键与EXTI7进行连接,EXTI_EXTICR2[31:24] 0x05//设置KEY1按键与EXTI8进行连接,EXTI_EXTICR3[7:0] 0x05switch(exti_event / 4){case 0:EXTI-EXTICR1 (~(0xff (exti_event % 4 *8)));EXTI-EXTICR1 | (ground (exti_event % 4 *8));break;case 1:EXTI-EXTICR2 (~(0xff (exti_event % 4 *8)));EXTI-EXTICR2 | (ground (exti_event % 4 *8));break;case 2: EXTI-EXTICR3 (~(0xff (exti_event % 4 *8)));EXTI-EXTICR3 | (ground (exti_event % 4 *8));break;case 3: EXTI-EXTICR4 (~(0xff (exti_event % 4 *8)));EXTI-EXTICR4 | (ground (exti_event % 4 *8));break;default:break;}//2、下降沿触发选择寄存器,EXTI_FTSR1[9] 1,EXTI_FTSR1[7] 1,EXTI_FTSR1[8] 1if(trigger RISING_TRIGGER){EXTI-RTSR1 | (0x1 exti_event);}else if(trigger FALLING_TRIGGER){EXTI-FTSR1 | (0x1 exti_event);}//3、设置中断屏蔽寄存器,EXTI_IMR1[9] 1,EXTI_IMR1[7] 1,EXTI_IMR1[8] 1EXTI-C1IMR1 | (0x1 exti_event);
}void hal_gic_init(unsigned int interruptid,unsigned int priority) //GIC章节初始化
{
//1.GICD章节初始化
//设置GICD层组0使能, GICD control register (GICD_CTLR): GICD_CTLR[0] 1GICD-CTRL | 1;
//设置GICD层中断使能,GICD interrupt set-enable register x (GICD_ISENABLERx)//key1 ---- PF9 ---- EXTI9 ---- 中断号99 ---- 99 / 32 3.......3 ---- GICD_ISENABLER3[3] 1//key2 ---- PF7 ---- EXTI7 ---- 中断号97 ---- 97 / 32 3.......1 ---- GICD_ISENABLER3[1] 1//key3 ---- PF8 ---- EXTI8 ---- 中断号98 ---- 98 / 32 3.......2 ---- GICD_ISENABLER3[2] 1GICD-ISENABLER[interruptid / 32] | (0x1 (interruptid % 32));
//设置GICD层中断优先级寄存器,GICD interrupt priority register x (GICD_IPRIORITYRx)//key1 ---- PF9 ---- EXTI9 ---- 中断号99 ---- 99 / 4 24.......3 ---- GICD_IPRIORITYR24[31:27] 0b00000//key2 ---- PF7 ---- EXTI7 ---- 中断号97 ---- 97 / 4 24.......1 ---- GICD_IPRIORITYR24[15:11] 0b00000//key3 ---- PF8 ---- EXTI8 ---- 中断号98 ---- 98 / 4 24.......2 ---- GICD_IPRIORITYR24[23:19] 0b0000GICD-IPRIORITYR[interruptid / 4] (~(0x1f (interruptid % 4 * 83)));GICD-IPRIORITYR[interruptid / 4] | (priority (interruptid % 4 * 83));
//设置GICD层中断目标分配给CPU0,GICD interrupt processor target register x (GICD_ITARGETSRx)//key1 ---- PF9 ---- EXTI9 ---- 中断号99 ---- 99 / 4 24.......3 ---- GICD_ITARGETSR24[25:24] 0b01 //key2 ---- PF7 ---- EXTI7 ---- 中断号97 ---- 97 / 4 24.......1 ---- GICD_ITARGETSR24[9:8] 0b01 //key3 ---- PF8 ---- EXTI8 ---- 中断号98 ---- 98 / 4 24.......2 ---- GICD_ITARGETSR24[17:16] 0b01 GICD-ITARGETSR[interruptid / 4] (~(0x3 (interruptid % 4 * 8)));GICD-ITARGETSR[interruptid / 4] | (0x1 (interruptid % 4 * 8));//2.GICC章节初始化//设置GICC层组0使能,GICC input priority mask register (GICC_PMR),GICC_CTLR[0] 1GICC-CTRL | 1;//设置GICC层中断优先级寄存器,GICC control register (GICC_CTLR),GICC_PMR[7:3] 0b11111GICC-PMR | (0x1f 3);
}
led.c
#include led.h//函数功能:GPIO引脚初始化操作
//参数1:GPIO组号
//参数2:引脚编号
//参数3:初始化内容
void hal_gpio_init(volatile gpio_t* gpiox,unsigned int pin,gpio_init_t* init)
{//1. 设置GPIO引脚模式gpiox-MODER (~(0x3 (pin*2)));gpiox-MODER | (init-moder (pin*2));//2. 设置GPIO引脚输出类型gpiox-OTYPER (~(0x1pin));gpiox-OTYPER | (init-otyper pin);//3. 设置GPIO引脚输出速率gpiox-OSPEEDR (~(0x3 (pin*2)));gpiox-OSPEEDR | (init-ospeedr (pin*2));//4. 设置GPIO引脚是否需要上下拉电阻gpiox-PUPDR (~(0x3 (pin*2)));gpiox-PUPDR | (init-pupdr (pin*2));
}//函数功能:GPIO引脚操作,写1点亮,写0熄灭
//参数1:GPIO组号
//参数2:引脚编号
//参数3:写的内容
void hal_gpio_write(volatile gpio_t* gpiox,unsigned int pin,gpio_status_t status)
{if(status GPIO_RESET_T) //熄灭{gpiox-ODR (~(0x1pin));}else if(status GPIO_SET_T) //点亮{gpiox-ODR | (0x1pin);}
}
do_irq.c
extern void printf(const char *fmt, ...);
unsigned int i 0;#include stm32mp1xx_gic.h
#include stm32mp1xx_exti.h
#include led.h//中断处理函数
void do_irq(void)
{//1.获取中断号 IAR[9:0]unsigned int interrupt_id GICC-IAR (0x3ff);//2.判断终端号,并执行相关操作......switch(interrupt_id){case 99:printf(key1键按下\n);GPIOE-ODR ^ (0x1 8); //LED3, PE8//3.清除EXTI层中断挂起标志位EXTI-FPR1 | (0x1 9); //key1//4.清除GICD层中断挂起标志位GICD-ICPENDR[3] | (0x1 3); //ke1break;case 97:printf(key2键按下\n);GPIOF-ODR ^ (0x1 10); //LED2, PF10//3.清除EXTI层中断挂起标志位EXTI-FPR1 | (0x1 7); //key2//4.清除GICD层中断挂起标志位GICD-ICPENDR[3] | (0x1 1); //key2break; case 98:printf(key3键按下\n);GPIOE-ODR ^ (0x1 10); //LED1, PE10//3.清除EXTI层中断挂起标志位EXTI-FPR1 | (0x1 8); //key3//4.清除GICD层中断挂起标志位GICD-ICPENDR[3] | (0x1 2); //key3break;}//5.清除中断号GICC-EOIR interrupt_id;}
main.c
#include key3.h
#include led.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);
}#define GPIOF_GROUP 0x05
#define KEY1_ID 99
#define KEY2_ID 97
#define KEY3_ID 98int main()
{RCC_MP_AHB4ENSETR | (0x34); //使能GPIOE/GPIOF组gpio_init_t init {OUTPUT,PP,LOWSPEED,NO_PUPDR}; //初始化GPIO结构体//初始化LED灯hal_gpio_init(GPIOE,GPIO_PIN_10,init); //LED1, PE10hal_gpio_init(GPIOF,GPIO_PIN_10,init); //LED2, PF10hal_gpio_init(GPIOE,GPIO_PIN_8,init); //LED3, PE8hal_exti_init(EXTI9,GPIOF_GROUP, FALLING_TRIGGER) ; //key1初始化hal_exti_init(EXTI7,GPIOF_GROUP, FALLING_TRIGGER) ; //key2初始化hal_exti_init(EXTI8,GPIOF_GROUP, FALLING_TRIGGER) ; //key3初始化hal_gic_init(KEY1_ID,9);hal_gic_init(KEY2_ID,7);hal_gic_init(KEY3_ID,8);while(1){ }return 0;
}运行结果
