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单片机-LED实验

news 2025/1/4 7:39:01

1、51工程模版

#include "reg52.h"
void main(){
   while(1){

   }
}

2、LED灯亮

#include "reg52.h"
sbit LED1=P2^0;
void main(){
   while(1){
       LED1=0;
   }
}

3、LED闪烁

#include "reg52.h"
sbit LED1=P2^0; //P2大写，默认是高电平
typedef unsigned int u16; //0~65535
typedef unsigned char u8; //0~255
void delay_10us(u16 ten_us){
   while(ten_us--); //当传入ten_su=1，大约延时10us
}
void main(){
   while(1){
       LED1=0; //灯亮
       delay_10us(50000); //延时  //500ms 450-500
       LED1=1; //灯灭
       delay_10us(50000);
   }
}

4、LED流水灯

4.1从左向右依次亮

方法一

#include "reg52.h"
#define LED_PORT P2
typedef unsigned int u16;
typedef unsigned char u8;
void delay_10us(u16 ten_us){
   while(ten_us--);
   }
void main(){
   u16 i=0;
   while(1){
       for (i=0;i<8;i++){
       LED_PORT=~(0X01<<i);
       delay_10us(50000);
       }
   }
}

方法二左移函数 _corl_

#include "reg52.h"
#include "intrins.h"
typedef unsigned int u16;
typedef unsigned char u8;
#define LED_PORT P2//宏定义
void delay_10us(u16 ten_us){
   while(ten_us--);
}
void main(){
   u16 i=0;
       LED_PORT=0XFE; //LED_PORT=~0X01; //1111 1110
       delay_10us(50000);
   while(1){
       for(i=0;i<7;i++){
       LED_PORT=_crol_(LED_PORT,1);
       delay_10us(50000);
       }
   }
}

4.2从右向左依次亮

#include "reg52.h"
#include "intrins.h"
typedef unsigned int u16;
typedef unsigned char u8;
#define LED_PORT P2//宏定义
void delay_10us(u16 ten_us){
   while(ten_us--);
}
void main(){
   u16 i=0;
       LED_PORT=0X7F; //0111 1111
       delay_10us(50000);
   while(1){
       for(i=0;i<7;i++){
       LED_PORT=_cror_(LED_PORT,1);
       delay_10us(50000);
       }
   }
}