4×4keyboard.c

含有大量的单片机代码

/****************************************************************
*行列4*4键盘驱动程序
*作者:Eqianli studio
*日期:2006/12/1
*说明:main()主函数,delay()延时,keyscan()键盘扫描,PinLamp()点灯

****************************************************************/

/****************************************************************
/////////////////////Beginning of Program////////////////////////
****************************************************************/

#include <reg52.h>
//#include"AT89X52.H"
#include"stdio.h"
#include <absacc.h>

#define TRUE             1
#define FALSE            0
#define DELAY_VALUE      3

sbit  P2_0=P2^0;
sbit  P2_1=P2^1;
sbit  P2_2=P2^2;
sbit  P2_3=P2^3;
sbit  P2_4=P2^4;
sbit  P2_5=P2^5;
sbit  P2_6=P2^6;
sbit  P2_7=P2^7;
sbit  P3_0=P3^0;

#define PinDrvKey1     P2_0
#define PinDrvKey2     P2_1
#define PinDrvKey3     P2_2
#define PinDrvKey4     P2_3

#define PinScanKey1    P2_4
#define PinScanKey2    P2_5
#define PinScanKey3    P2_6
#define PinScanKey4    P2_7

#define Lamp           P3_0
           
void initial(void);
void delay(short i);
unsigned char keyscan(void);
void PinLamp(void);

void main(void)
  {unsigned char keyword;
     initial();
      while(1)
       { keyword=keyscan();
        }
  }


void initial(void)
 {
        
          P3_0=TRUE;           //发光三极管高为不亮

  }


void PinLamp(void)

    {
  
   
          Lamp=FALSE;
       delay(DELAY_VALUE);
             delay(DELAY_VALUE);
              delay(DELAY_VALUE);
               delay(DELAY_VALUE);
                 delay(DELAY_VALUE);  
                           Lamp=TRUE;
         
  }


unsigned char keyscan(void)
  {       
        
          PinDrvKey1=FALSE;
          PinScanKey1=TRUE;
        if(PinScanKey1!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey1!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey1!=TRUE)
         return 0; }
  
    PinScanKey2=TRUE;
        if(PinScanKey2!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey2!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey2!=TRUE)
         return 4; }

     PinScanKey3=TRUE;
        if(PinScanKey3!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey3!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey3!=TRUE)
         return 8; }

     PinScanKey4=TRUE;
        if(PinScanKey4!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey4!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey4!=TRUE)
         return 12; }
                 PinDrvKey1=TRUE;       //扫描完一列


          PinDrvKey2=FALSE;
          PinScanKey1=TRUE;
        if(PinScanKey1!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey1!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey1!=TRUE)
         return 1; }
  
    PinScanKey2=TRUE;
        if(PinScanKey2!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey2!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey2!=TRUE)
         return 5; }

     PinScanKey3=TRUE;
        if(PinScanKey3!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey3!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey3!=TRUE)
         return 9; }

     PinScanKey4=TRUE;
        if(PinScanKey4!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey4!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey4!=TRUE)
         return 13; }
                 PinDrvKey2=TRUE;       //扫描完二列

    PinDrvKey3=FALSE;
          PinScanKey1=TRUE;
        if(PinScanKey1!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey1!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey1!=TRUE)
         return 2; }
  
    PinScanKey2=TRUE;
        if(PinScanKey2!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey2!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey2!=TRUE)
         return 6; }

     PinScanKey3=TRUE;
        if(PinScanKey3!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey3!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey3!=TRUE)
         return 10; }

     PinScanKey4=TRUE;
        if(PinScanKey4!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey4!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey4!=TRUE)
         return 14; }
      PinDrvKey3=TRUE;       //扫描完三列

      PinDrvKey4=FALSE;
          PinScanKey1=TRUE;
        if(PinScanKey1!=TRUE)
             PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey1!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey1!=TRUE)
         return 4; }
  
      PinScanKey2=TRUE;
        if(PinScanKey2!=TRUE)
               PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey2!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey2!=TRUE)
         return 8; }

     PinScanKey3=TRUE;
        if(PinScanKey3!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey3!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey3!=TRUE)
         return 12; }

     PinScanKey4=TRUE;
        if(PinScanKey4!=TRUE)
              PinLamp();
           delay(DELAY_VALUE);
    if(PinScanKey4!=TRUE)
             {
               delay(DELAY_VALUE);
             if(PinScanKey4!=TRUE)
         return 16; }
        PinDrvKey4=TRUE;       //扫描完四列

  }


void delay(short i)
  {
  int j=1;
  int k=0;
  k=i*DELAY_VALUE;
  while(j) 
  {if(j==k)
    break;
  }  
  }