uchar shaomiao()
{
uchar l,h;
P1 = 0xf0;
if((P1 & 0xf0) != 0xf0)
{
ms1(5);
if((P1 & 0xf0) != 0xf0)
{
l = P1 & 0xf0;
P1 = l | 0x0f;
h = P1 & 0x0f;
anjian = l + h;
while((P1 & 0x0f) !=0x0f);
return (l + h);
}
}
}
说错了,是while((P1 & 0x0f) !=0x0f)中假设第一个键被按下P1不应该是0xee吗?即使乘以0x0f也始终不会等下0x0f呀?