标题:
矩阵键盘扫描
[打印本页]
作者:
zhuwf1207
时间:
2018-11-14 22:55
标题:
矩阵键盘扫描
unsigned char jzjpsm()
{
unsigned char a,b;
dkjz=0x0f;
if((dkjz&0x0f)==0x0f) return(0xff);
ys(30);
if((dkjz&0x0f)==0x0f) return(0xff);
a=dkjz&0x0f;
dkjz=0xf0;
b=dkjz&0xf0;
a=a|b;
while(dkjz!=0xf0);
return(a);
}
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