求4x4单片机键盘扫描程序_问答

#include
//#include
#include
#define uchar unsigned char
#define TURE 1
#define FALSE 0
int key;
int del;
void Tkey(void);
void led(void);

/************主  程序*************/
void main(void)
{
  void tkey(void);
  void led(void);
  void delay(int);



  SCON=0x00;
  TI=0;
  while(TURE)
  {
Tkey();
led();
delay(2000);
  }

}

/********矩键查寻键值4*4程序******/按键为P1.0---P1.7
void Tkey(void)
{
  uchar readkey;//rereadkey;
  uchar x_temp,y_temp;

  P1=0x0f;
  x_temp=P1&0x0f;
  if(x_temp==0x0f) goto keyout;
  P1=0xf0;
  y_temp=P1&0xf0;
  readkey=x_temp|y_temp;
  readkey=~readkey;

switch(readkey)
{
      case 0x11:key=0; break;
       case 0x21:key=1; break;
   case 0x41:key=2; break;
   case 0x81:key=3; break;
   case 0x12:key=4; break;
   case 0x22:key=5; break;
   case 0x42:key=6; break;
   case 0x82:key=7; break;
   case 0x14:key=8; break;
   case 0x24:key=9; break;
   case 0x44:key=10;break;
   case 0x84:key=11;break;
   case 0x18:key=12;break;
   case 0x28:key=13;break;
   case 0x48:key=14;break;
   case 0x88:key=15;break;
   default:  key=16;break;
}

keyout:_nop_();
}

/************显示程序*************/
void led(void)
{uchar code LEDValue[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};  //0-9
uchar data num[6];
uchar k;
num[0]=0;
num[1]=0;
num[2]=0;
num[3]=0;
num[4]=key/10;
num[5]=key-(key/10)*10;

for(k=0;k<=5;k++)
{
SBUF=LEDValue[num[5-k]];
while(TI==0);
TI=0;
}
}

/************延时程序*************/
void delay(del)
{
for(del;del>0;del--);
}

求4x4单片机键盘扫描程序

Markdown 语法

Markdown 语法