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));
 
    //LED2
    GPIOF_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));
 
    //LED3
    GPIOE_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

uart4.c

#include "uart4.h"
void uart4_config()
{
    //使能GPIOB/GPIOG/UART4外设时钟
    RCC->MP_AHB4ENSETR |=(0x1<<1);
    RCC->MP_AHB4ENSETR |=(0x1<<6);
    RCC->MP_APB1ENSETR |=(0x1<<16);
    //设置PB2/PG11用于ＵＡＲＴ4为复用功能
GPIOB->MODER &=(~(0X3<<4));
GPIOB->MODER |=(0X2<<4);
GPIOB->AFRL &=(~(0Xf<<8));
//原来没有移动,下面也是
GPIOB->AFRL |=(0x8<<8);
 //pg１１
GPIOG->MODER  &=(~(0X3<<22));
//这一整块都移动错误
GPIOG->MODER |=(0X2<<22); 
GPIOG->AFRH &=(~(0Xf<<12));
//最后一个写成Ｌ
GPIOG->AFRH |=(0x6<<12);
 //串口禁用
USART4->CR1 &=(~0x1);
// UART4->CR1 |=(0x1)
//设置数据位宽为８位
USART4->CR1 &=(~(0x1<<12));
USART4->CR1 &=(~(0x1<<28));
//?

//设置无奇偶校验位
USART4->CR1 &=(~(0x1<<10));
//设置１６倍过采样
USART4->CR1 &=(~(0x1<<15));
//设置１位停止位
USART4->CR2 &=(~(0x3<<12));
//设置不分频
USART4->PRESC &=(~(0xf));
//设置波特率为1１５２００
 USART4->BRR =0X22B;
//使能发送器
USART4->CR1 |=(0X1<<3);
//使能接收器
USART4->CR1 |=(0X1<<2); 
//使能串口
USART4->CR1 |=(0X1);

}
void putchar(char a )
{
  //判断是发送器否为空，不为空等待
while(!(USART4->ISR &(0X1<<7))); 

//向发送寄存器写入数据
   USART4->TDR=a ;
//等待发送完成
    while(!(USART4->ISR &(0x1<<6)));
}
char getchar()
{
//判断接收器是否有准好的数据，没有就等待
char a;

while(!(USART4->ISR &(0X1<<5)));
//读取数据
 a=USART4->RDR;
 //返回
 return a;
}

void gets(char *s)
{
    while(1)
    {
        *s=getchar();
        if(*s=='\r')
        {
            break;
        }
        s++;
    }
    *s='0';

}
void puts(char *s)
{
    while(1)
    {
        putchar(*s);
        s++;
    }
    putchar('\r');
    putchar('\n');

}
int cmp(char  *s1,char *s2)
{
    int i = 0;
 
	while(((*(s1+i))==(*(s2+i))))
  {
		i++;
		if( (*(s1+i)=='\0'))
    {
      break;
		}
 
	}
	int sub = ((*(s1+i))-(*(s2+i)));
	if(sub>0)
  {
		return sub;
	}
  else if(sub<0)
  {
		return sub;
	}
  else
  {
		return 0;			
	}

}