第一个dp51程序实现拉幕效果

周立功的增强型80c51单片机速成与实践中的Hello代码,经过加工后,实现一个简单的拉幕效果很简单的代码,虽然只是一小步,同时也是一大步

#include<REG52.h>
#include<stdio.h>
#include <intrins.h>
sbit    SDA=P1^0;
sbit    CLK=P1^1;

unsigned    char    data    display_bit;
unsigned    char    code    led[20]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf,0x89,0x8C}; 

void    delay(unsigned int k)
{
    unsigned    int i,j;
for(i=0;i<k;i++)
for(j=0;j<100;j++);
}
void    send(unsigned char a)
{
    unsigned char i;
    for(i=0;i<8;i++)
    {
        if(_crol_(a,i)&0x80)
            SDA=1;
        else
            SDA=0;
        CLK=0;
        CLK=1;
    }
}




main()
{   
    unsigned char display_buffer[5]={0x00,0x0d,0x12,0x05,0x01};
    int counter;
    while(1)
    {
        unsigned    char    i,k;
        int lay=0;

          for(lay=0;lay<100;lay++)
          {
            for(i=0;i<5;i++)
            {   
                int discnt=(counter+i)%5;
                k=led[display_buffer[discnt]];
                send(k);
                P1=display_bit;
                delay(0x01);
                P1=0xff;
                display_bit=_cror_(display_bit,1);
              }
             display_bit=0x7f;
          }
           
            counter++;   
           // delay(0x3f);
    }
}