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引腳參照?qǐng)D片
單片機(jī)源程序如下：
#include <STC89.H>
#include "Keypad.h"
// 鍵值 鍵釋放時(shí)間 鍵按下時(shí)間
char KeyNum;
unsigned int KeyUpCnt,KeyDownCnt;
char KeyScan()
{
P1 |= 0xFC;
P2 = (P2&0xF0) | (0x0E);
if(!P17)return 0x11;//ON/C
if(!P16)return '7'; //7
if(!P15)return '8'; //8
if(!P14)return '9'; //9
if(!P13)return '*'; //x
if(!P12)return '/'; //÷
P1 |= 0xFC;
P2 = (P2&0xF0) | (0x0D);
if(!P17)return 0x12;//+/-
if(!P16)return '4'; //4
if(!P15)return '5'; //5
if(!P14)return '6'; //6
if(!P13)return '-'; //-
if(!P12)return 0x13;//MRC
P1 |= 0xFC;
P2 = (P2&0xF0) | (0x0B);
if(!P17)return '%'; //%
if(!P16)return '1'; //1
if(!P15)return '2'; //2
if(!P14)return '3'; //3
if(!P13)return '+'; //+
if(!P12)return 0x14;//M-
P1 |= 0xFC;
P2 = (P2&0xF0) | (0x07);
if(!P17)return '?'; //?
if(!P16)return '0'; //0
if(!P15)return '.'; //.
if(!P14)return '='; //=
if(!P13)return '+'; //+
if(!P12)return 0x15;//M+
P2 = (P2&0xF0) | (0x0F);
return -1;
}
全部資料51hei下載地址：
4x6行列鍵盤(pán)驅(qū)動(dòng).rar
(3.43 KB, 下載次數(shù): 13)
2018-10-24 16:29 上傳
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