单片机键盘+8255与LED 修改地址

ID:364749 · 发表于 2018-7-4 13:09

8255与LED修改地址

单片机源程序如下:

#include <reg51.h>
#include<absacc.h>
#define PA XBYTE[0xff00]
#define com XBYTE[0xff03]
unsigned char code tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char temp=9;
sbit key0=P3^2;
sbit key1=P3^3;
sbit c1=P3^4;
sbit c2=P3^5;
delay(unsigned int t)
{
unsigned char k;
while(t--) for(k=0;k<120;k++);
}
key_scan()
{
key1=1;
key0=1;
if(!key0) {delay(10);if(!key0){if(temp==9) temp=0;else temp++;while(!key0);}}
if(key1==0) {delay(10);if(key1==0){if(temp==0)temp=9;else temp--;while(!key1);}}
}
disp()
{
PA=tab[temp];
c1=0;
delay(1);
}
main()
{
com=0x80;
while(1)
{
disp();
key_scan();
}
}

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所有资料51hei提供下载:

8255与LED 修改地址.zip (43.51 KB, 下载次数: 18)

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