8155_7221c语言程序

本c程序经过了Proteus仿真成功，硬件可能要修改，附电路图
#include <reg52.h>
#include<ABSACC.H>
#include<max7221.h>
#define a8155_CON XBYTE[0xf200] /*控制字地址*/
#define a8155_PA XBYTE[0xf201] /*PA口地址*/
#define a8155_PB XBYTE[0xf202] /*PB口地址*/
#define a8155_PC XBYTE[0xf203] /*PC口地址*/
#define uchar unsigned char
#define uint unsigned int
uchar temp1,temp2,temp,b;
void delayms(uchar ms)
{
uchar x;
for(;ms>0;ms--)
{
for(x=125;x>0;x--);
}
}
uchar code disp[]=
{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; uchar code key_code[] =
{
//键编码数组
0xee, 0xed, 0xeb, 0xe7, 0xde, 0xdd, 0xdb, 0xd7, 0xbe, 0xbd, 0xbb,
0xb7, 0x7e, 0x7d, 0x7b, 0x77
}; //不同的按键规律需要重新的调整。

void diplay()
{
}
void main()
{
uchar j;
init7221();
while(1)
{
//wraddr(2,2);
a8155_CON=0x03;//a出
a8155_PA=0xf0; //hang
a8155_PB=0x00; //lie
a8155_CON=0x02;//a入
temp1=a8155_PA;
temp1=temp1&0xf0;
if(temp1!=0xf0)
{
delayms(5);
temp1=a8155_PA;
temp1=temp1&0xf0;
if(temp1!=0xf0)
{
a8155_CON=0x03;//a出
a8155_PA=0x00; //hang
a8155_PB=0x0f; //lie
a8155_CON=0x01;
temp2=a8155_PB;
temp2=temp2&0x0f;
temp1=temp1&0xf0;
temp=temp1+temp2;
}
}
//P1=disp[2];
for (j = 0; j < 16; j++)
{
if (temp == key_code[j])
//查表得键值
{
P1=disp[j];
wraddr(1,j); //返回有效键值
}
}
}
}
Max7221数码管驱动h文件
#ifndef __MAX7221_H__
#define __MAX7221_H__
#define uchar unsigned char
#define uint unsigned int
sbit DIN = P3^0;
sbit SCL = P3^2;
sbit CS = P3^1;
void delayus(uchar us)
{
while(us--);
}
void wr7221(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
DIN=(bit)(dat&0x80);
SCL=0;
delayus(2);
SCL=1;
delayus(2);
dat=dat<<1;
}
}
void wraddr(uchar addr,uchar dat) {
CS=0;
wr7221(addr);
wr7221(dat);
CS=1;
}
void init7221(void)
{
wraddr(0x0a,0x04);
wraddr(0x0b,0x07);
wraddr(0x0c,0x01);
wraddr(0x0f,0x00);
wraddr(0x09,0x0ff);
}
#endif
仿真电路图。