main.c

单片机键盘扫描程序源代码,要下载的快

#include"reg51.h"
#include"address.h"
#include"shuma.h"

#define uchar unsigned char 


uchar checkkey();
unsigned char code Tab[]={0x12,0x9F,0x31,0x15,0x9C,0x54,0x50,0x1F,
                          0x10,0x14,0x18,0xD0,0x72,0x91,0x70,0x78};
uchar lastkey;

void main()
{
while(1)
{
 if(checkkey())
 {
  switch(KEYDATA)
  {
	case 0xfe:
			send(Tab[0]);
			send(0xff);
			break;
	case 0xfd:
			send(Tab[1]);
			send(0xff);
			break;
	case 0xfb:
			send(Tab[2]);
			send(0xff);
			break;
	case 0xf7:
			send(Tab[3]);
			send(0xff);
			break;
	case 0xef:
			send(Tab[4]);
			send(0xff);
			break;
	case 0xdf:
			send(Tab[5]);
			send(0xff);
			break;
	case 0xbf:
			send(Tab[6]);
			send(0xff);
			break;
	case 0x7f:
			send(Tab[7]);
			send(0xff);
		    break;
	default:
		break;
  }
 }
}
}

uchar checkkey()
{
 if(lastkey!=KEYDATA)
 {
 lastkey=KEYDATA;
 return 1;

 }
 return 0;
}