矩阵按键扫描函数－－－线路不管怎样接，此函数可适用,可做底层函数

//此按键数为3*8， 可支持8*8

#include<reg51.h>

#define COM(x1,x2,x3,x4,x5,x6,x7,x8) ((x1&0xff)|((x2&0xff)<<1)|((x3&0xff)<<2)|((x4&0xff)<<3)|((x5&0xff)<<4)|((x6&0xff)<<5)|((x7&0xff)<<6)|((x8&0xff)<<7))    //编成一个字节数据
#define ROW_NUM  3  //矩阵列数

sbit Gate1 = P3^2; //按键控制端口1（列扫描）共8*3列
sbit Gate2 = P3^3; //按键控制端口2（列扫描）
sbit Gate3 = P3^4; //按键控制端口3（列扫描）
sbit Dial_KeyOne   = P0^6;//表盘按键1                      矩阵不管怎样接，只改变这里的定义
sbit Dial_KeyTwo   = P2^6;//表盘按键2
sbit Dial_KeyThree = P2^7;//表盘按键3
sbit Dial_KeyFour  = P2^5;//表盘按键4
sbit Dial_KeyFine  = P2^4;//表盘按键5
sbit Dial_KeySix   = P2^3;//表盘按键6
sbit Dial_KeySeven = P2^0;//表盘按键7
sbit Dial_KeyEight = P3^0;//表盘按键8

/