kbscan.txt

来自「51开发板调试程序」· 文本 代码 · 共 45 行

UCHARCODE  uccRemove[3]={0x03,0x05,0x06};
void   KBScan(void)
{
    ucdKBScan_Acc = uccRemove[ucdIncrease];
	ucdIncrease = ucdIncrease + 1;
    if(ucdIncrease >= 3)
	{
	    ucdIncrease = 0;
	}

	ucdKBScan_Acc = ucdKBScan_Acc|0xf0;

        P0 = P0&0xc0;
	P0 = P0|ucdKBScan_Acc;

	for(i = 0; i < 100; i++)
	    for(j = 0; j < 80; j++)
	        ucdReceiver = P0;

        ucdReceiver = ucdReceiver&0x3f;

	 if(ucdReceiver == 0x1b)
	     ucdKBScanResult = 0;
	 else if(ucdReceiver == 0x2b)
	     ucdKBScanResult = 1;
	 else if(ucdReceiver == 0x33)
	     ucdKBScanResult = 2;
	 else if(ucdReceiver == 0x1d)
	     ucdKBScanResult = 3;
	 else if(ucdReceiver == 0x2d)
	     ucdKBScanResult = 4;
	 else if(ucdReceiver == 0x35)
	     ucdKBScanResult = 5;
	 else if(ucdReceiver == 0x1e)
	     ucdKBScanResult = 6;
	 else if(ucdReceiver == 0x2e)
	     ucdKBScanResult = 7 ;
	 else if(ucdReceiver == 0x36)
	     ucdKBScanResult = 8;
	 else
	     ucdKBScanResult = 30;

	 //return  ucdKBScanResult;
	 
}