【51单片机4个IO实现16按键可扩展独立按键64矩阵驱动显示矩阵原值】2023-5-8

缘由

#include "reg52.h"
sbit L1=P2^2;
sbit L2=P2^3;
sbit L3=P2^4;
unsigned char code ShuMaGuan[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00,0X80,64};//0~9隐.小数点-号
void ShuMaXianShi(unsigned char s,unsigned char w,unsigned char d)
{
	P0=L1=L2=L3=0;
	switch(w)
	{
		case 2:{L1=0;L2=L3=1;}break;//011
		case 3:{L2=0;L1=L3=1;}break;//101
		case 4:{L1=L2=0;L3=1;}break;//001
		case 5:{L1=L2=1;L3=0;}break;//110
		case 6:{L1=L3=0;L2=1;}break;//010
		case 7:{L1=1;L2=L3=0;}break;//100
		case 8:{L1=L2=L3=0;}break;//000
		case 1:{L1=L2=L3=1;}break;//111
		default:{L1=L2=L3=0;}break;
	}//d显示小数点11,10关闭
	P0=ShuMaGuan[s]|ShuMaGuan[d];
}
unsigned char DuLlJuZhen(/*独立416矩阵*/)
{//1 2 4 8
	unsigned char H=15,L=240,Ys=0,zhi=H+L;
	P1=15;
	if(P1!=15){while(++Ys);if(P1!=15)zhi=P1;while(P1!=zhi);return zhi;}
	P1=14;
	if(P1!=14){while(++Ys);if(P1!=14)zhi=P1;while(P1!=zhi);return zhi;}
	P1=13;
	if(P1!=13){while(++Ys);if(P1!=13)zhi=P1;while(P1!=zhi);return zhi;}
	P1=11;
	if(P1!=11){while(++Ys);if(P1!=11)zhi=P1;while(P1!=zhi);return zhi;}
	P1=7;
	if(P1!=7){while(++Ys);if(P1!=7)zhi=P1;while(P1!=zhi);return zhi;}
	P1 = 0;
	return (H+L);
}
void main()
{
	unsigned char jz=0,ys=0,xs=0,sm=0;
	while(1)
	{
		
		if(++ys==0)
		{jz=DuLlJuZhen();if(jz!=255)sm=jz;
			if(++xs>3)xs=1;
			if(xs==1)ShuMaXianShi(sm%10,8,10);
			else if(xs==2)ShuMaXianShi(sm/10%10,7,10);
//			else if(xs==3)ShuMaXianShi(sm/100,6,10);
		}
	}
}