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標(biāo)題: 51單片機(jī)4*4矩陣鍵盤(pán)proteus仿真與源碼 [打印本頁(yè)]

作者: Loser007 時(shí)間: 2018-5-5 18:51
標(biāo)題: 51單片機(jī)4*4矩陣鍵盤(pán)proteus仿真與源碼
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）

基于AT89S52單片機(jī)的4*4矩陣鍵盤(pán)程序
C++ Code

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/*----------------------------------------
File: key44.h
Date:Loser007    May 5, 2018 12:59

----------------------------------------*/

#ifndef __KEY44_H__
#define __KEY44_H__
#pragma SAVE
#pragma REGPARMS
extern char Matrix_keyboard(void);

/*----------------------------------------
Name: Matrix_keyboard
Features: Get a case from the 4*4 keyboard
Parameter: No
Return:Key code (char)
Instructions:Keyboard I/0 From P1^0 to P1^7
Date:Loser007    May 5, 2018 10:40
----------------------------------------*/
char Matrix_keyboard(void)
{
unsigned char Key = 0, X = 0, Y = 0;
P1 = 0xF0;  //11110000
X = P1 & 0xF0;  //Get row (P1 XOR 11110000) Get Height
if(X != 0xF0)
{
      X = P1 ^ 0xF0;
      P1 = 0x0F;  //00001111
      Y = P1 & 0x0F;
      if(Y != 0x0F)
      {
         Y = P1 ^ 0x0F;  //Get Column (P1 XOR 00001111) Get Low
         Key = X + Y;
      }
}
switch (Key)
{
// 1
case 0x81:
      return 0; //1000 0001
case 0x82:
      return 1; //1000 0010
case 0x84:
      return 2; //1000 0100
case 0x88:
      return 3; //1000 1000
// 2
case 0x41:
      return 4; //0100 0001
case 0x42:
      return 5; //0100 0010
case 0x44:
      return 6; //0100 0100
case 0x48:
      return 7; //0100 1000
// 3
case 0x21:
      return 8; //0010 0001
case 0x22:
      return 9; //0010 0010
case 0x24:
      return 10;  //0010 0100
case 0x28:
      return 11;  //0010 1000
//4
case 0x11:
      return 12;  //0001 0001
case 0x12:
      return 13;  //0001 0010
case 0x14:
      return 14;  //0001 0100
case 0x18:
      return 15;  //0001 1000

default:
      return 255;
}
}
#endif

矩陣鍵盤(pán).rar

21.53 KB, 下載次數(shù): 26, 下載積分: 黑幣 -5

代碼

作者: Loser007 時(shí)間: 2018-5-5 18:52
嚴(yán)禁轉(zhuǎn)載尤其是CSDN

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