12.25

led.c

#include "led.h"
void all_led_init()
{RCC_GPIO |= (0X3<<4);//时钟使能GPIOE_MODER &=(~(0X3<<20));//设置PE10输出GPIOE_MODER |= (0X1<<20);//设置PE10为推挽输出GPIOE_OTYPER &=(~(0x1<<10));//PE10为低速输出GPIOE_OSPEEDR &= (~(0x3<<20));//设置无上拉下拉GPIOE_PUPDR &= (~(0x3<<20));//LED2GPIOF_MODER &=(~(0X3<<20));//设置Pf10输出GPIOF_MODER |= (0X1<<20);//设置Pf10为推挽输出GPIOF_OTYPER &=(~(0x1<<10));//Pf10为低速输出GPIOF_OSPEEDR &= (~(0x3<<20));//设置无上拉下拉GPIOF_PUPDR &= (~(0x3<<20));//LED3GPIOE_MODER &=(~(0X3<<16));//设置PE8输出GPIOE_MODER |= (0X1<<16);//设置PE8为推挽输出GPIOE_OTYPER &=(~(0x1<<8));//PE8为低速输出GPIOE_OSPEEDR &= (~(0x3<16));//设置无上拉下拉GPIOE_PUPDR &= (~(0x3<<16));
}
void led1_on()
{GPIOE_ODR |= (0x1<<10);
}void led1_off()
{GPIOE_ODR &= (~(0x1<<10));
}
void led2_on()
{GPIOF_ODR |= (0x1<<10);
}void led2_off()
{GPIOF_ODR &= (~(0x1<<10));
}
void led3_on()
{GPIOE_ODR |= (0x1<<8);
}void led3_off()
{GPIOE_ODR &= (~(0x1<<8));
}

led.h

#ifndef __LED_H_
#define __LED_H_#define RCC_GPIO     (*(unsigned int *)0x50000a28)
#define GPIOE_MODER     (*(unsigned int *)0x50006000)
#define GPIOF_MODER     (*(unsigned int *)0x50007000)
#define GPIOE_OTYPER     (*(unsigned int *)0x50006004)
#define GPIOF_OTYPER     (*(unsigned int *)0x50007004)
#define GPIOF_OSPEEDR     (*(unsigned int *)0x50007008)
#define GPIOE_OSPEEDR     (*(unsigned int *)0x50006008)
#define GPIOF_PUPDR      (*(unsigned int *)0x5000700C)
#define GPIOE_PUPDR     (*(unsigned int *)0x5000600C)
#define GPIOE_ODR     (*(unsigned int *)0x50007014)
#define GPIOF_ODR     (*(unsigned int *)0x50006014)void led1_on();
void led2_on();
void led3_on();
void led1_off();
void led2_off();
void led3_off();void delay(int ms);void all_led_init();
#endif

uart4.h

#ifndef __UART4_H_
#define __UART4_H_
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include"stm32mp1xx_uart.h"
void uart4_config();
void putchar(char a);
char getchar();
int cmp(char  *s1,char *s2);
void puts(char *s);
void gets(char *s);
#endif

#include"uart4.h"#include "led.h"int main(){char st[100];all_led_init();uart4_config();while(1){gets(st);puts(st);if(cmp(st,"open")==0){led1_on();led2_on();led3_on();}if(cmp(st,"close")==0){led1_off();led2_off();led3_off();}}return 0;}

main.c