51-2

#include <reg52.h>
sbit LED1 = P1^0;
sbit LED2 = P1^1;
sbit LED8 = P1^7;
void main()
{
    LED1 = 0;
    LED2 = 0;
    LED8 = 0;
    while(1);    
}

#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint  unsigned int

//How to use the header file intrins.h 
//_crol_ 字符循环左移
//_cror_ 字符循环右移
//_nop_ 空操作8051 NOP 指令
//LED = _crol_(LED,1)执行一次后的结果为0x1111 1101

sbit LED1 = P1^0;
uchar i;
uchar temp;

void delay(uint z)
{
    uint x,y;
    for(x = z; x > 0; x--)
        for(y = 120; y > 0 ; y--);
}

void main()
{
    temp = 0x7f;// 0111 1111
    P1 = temp;
    while(1)
    {
        for(i = 0; i < 8; i++)
        {
            temp = _cror_(temp,1);//循环右移
            P1 = temp;
            delay(1000);    
        }
    } 
}

#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint  unsigned int
sbit we = P2^7;
sbit du = P2^6;

uchar code leddata[]={ 
 
                0x3F,  //"0"
                0x06,  //"1"
                0x5B,  //"2"
                0x4F,  //"3"
                0x66,  //"4"
                0x6D,  //"5"
                0x7D,  //"6"
                0x07,  //"7"
                0x7F,  //"8"
                0x6F,  //"9"
                0x77,  //"A"
                0x7C,  //"B"
                0x39,  //"C"
                0x5E,  //"D"
                0x79,  //"E"
                0x71,  //"F"
                0x76,  //"H"
                0x38,  //"L"
                0x37,  //"n"
                0x3E,  //"u"
                0x73,  //"P"
                0x5C,  //"o"
                0x40,  //"-"
                0x00,  //熄灭
                0x00  //自定义
 
                         };

void delay(uint z)
{
    uint x,y;
    for(x = z; x > 0; x--)
        for(y = 114; y > 0 ; y--);
}

void main()
{
        du = 1;    //打开段选
        P0 = leddata[10];
        du = 0;    //关闭段选
        //delay(5);

        we = 1;//打开位选
        P0 = 0;
        we = 0;    //关闭位选

        
        while(1);
}