用8255使6个数码管显示向左移的“8”

 

#include "reg52.h" //包函8051 内部资源的定义

#include <absacc.h>

#define PA8255 XBYTE[0XFEA0]

#define PB8255 XBYTE[0XFEA1]

#define PK8255 XBYTE[0XFEA3]

unsigned int i;

void delay(void)

{for(i=0;i<39000;i++);}

main()

{

PK8255=0x80;

PA8255=0X7F;

PB8255=0xfe;

while(1)

{

PB8255=PB8255<<1|PB8255>>7;

delay();

}

}