本程序在一位上显示按键，如果多位显示主程序需要修高为多位显示。本程序软件包括去抖功能，没有注释说明。
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uint key,i;
uchar temp,temp1,ms,buff;
uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,
0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
void delay(ms)
{
while(ms--)
{
for(i=0;i<120;i++);
}
}
void B_key()
{
temp1=0xfe;
P1=temp1;
if(P1!=temp1)
{
delay(10);
if (P1!=temp1)
{
temp=P1;
switch(temp)
{
case 0xee:key=0;break;
case 0xde:key=1;break;
case 0xbe:key=2;break;
case 0x7e:key=3;break;
default:break;
}
}
}
temp1=0xfd;
P1=temp1;
if(P1!=temp1)
{
delay(10);
if (P1!=temp1)
{
temp=P1;
switch(temp)
{
case 0xed:key=4;break;
case 0xdd:key=5;break;
case 0xbd:key=6;break;
case 0x7d:key=7;break;
default:break;
}
}
}
temp1=0xfb;
P1=temp1;
if(P1!=temp1)
{
delay(10);
if (P1!=temp1)
{
temp=P1;
switch(temp)
{
case 0xeb:key=8;break;
case 0xdb:key=9;break;
case 0xbb:key=10;break;
case 0x7b:key=11;break;
default:break;
}
}
}
temp1=0xf7;
P1=temp1;
if(P1!=temp1)
{
delay(10);
if (P1!=temp1)
{
temp=P1;
switch(temp)
{
case 0xe7:key=12;break;
case 0xd7:key=13;break;
case 0xb7:key=14;break;
case 0x77:key=15;break;
default:break;
}
}
}
}
void main()
{
while(1)
{
B_key();
P2=tab[key];
P3=0x04;
}
}
#include "io430.h" #define uchar unsigned char #define uint unsigned int uint key,i; uchar temp,temp1,ms; uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80, 0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; void delay(uchar ms) { while(ms--) { for(i=0;i<120;i++); } } void B_key() { temp1=0x0e; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xee:key=0;break; case 0xde:key=1;break; case 0xbe:key=2;break; case 0x7e:key=3;break; default:break; } } } temp1=0x0d; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xed:key=4;break; case 0xdd:key=5;break; case 0xbd:key=6;break; case 0x7d:key=7;break; default:break; } } } temp1=0x0b; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xeb:key=8;break; case 0xdb:key=9;break; case 0xbb:key=10;break; case 0x7b:key=11;break; default:break; } } } temp1=0x07; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xe7:key=12;break; case 0xd7:key=13;break; case 0xb7:key=14;break; case 0x77:key=15;break; default:break; } } } } int main( void ) { // Stop watchdog timer to prevent time out reset WDTCTL = WDTPW + WDTHOLD; P1D=0x0f; P2DIR=0xff; while(1) { B_key(); P2OUT=tab[key]; } } 
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#include "io430.h" #define uchar unsigned char #define uint unsigned int uint key,i; uchar temp,temp1,ms; uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80, 0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; void delay(uchar ms) { while(ms--) { for(i=0;i<120;i++); } } void B_key() { temp1=0x0e; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xee:key=0;break; case 0xde:key=1;break; case 0xbe:key=2;break; case 0x7e:key=3;break; default:break; } } } temp1=0x0d; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xed:key=4;break; case 0xdd:key=5;break; case 0xbd:key=6;break; case 0x7d:key=7;break; default:break; } } } temp1=0x0b; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xeb:key=8;break; case 0xdb:key=9;break; case 0xbb:key=10;break; case 0x7b:key=11;break; default:break; } } } temp1=0x07; P1OUT=temp1; if(P1IN!=temp1) { delay(10); if (P1IN!=temp1) { temp=P1IN|temp1; switch(temp) { case 0xe7:key=12;break; case 0xd7:key=13;break; case 0xb7:key=14;break; case 0x77:key=15;break; default:break; } } } } int main( void ) { // Stop watchdog timer to prevent time out reset WDTCTL = WDTPW + WDTHOLD; P1D=0x0f; P2DIR=0xff; while(1) { B_key(); P2OUT=tab[key]; } }
-电子元器件采购网（www.ruidan.com）是本土元器件目录分销商，采用“小批量、现货、样品”销售模式，致力于满足客户多型号、高质量、快速交付的采购需求。
自建高效智能仓储，拥有自营库存超过50,000种，提供一站式正品现货采购、个性化解决方案、选型替代等多元化服务。