#include <reg51.h>
#include <intrins.h>
unsigned char scan();
void process(unsigned char v);
//void delayms(unsigned char ms);
sbit K1 = P0^0; //对应按钮K1
sbit K2 = P0^1; //对应按钮K2
main()
{
unsigned char s,v;
v = 0x00;
P2 = 0xfe;
while(1)
{
s = scan();
if(s != v)
{
// delayms(10);
s = scan();
if(s != v)
{
v = s;
process(v);
// process(s);
}
}
}
}
unsigned char scan()
{
unsigned char key_s;
key_s = 0x00;
key_s =key_s|K2;
key_s =key_s<<1;
key_s =key_s|K1;
return key_s;
}
void process(unsigned char key_v)
{
if((key_v & 0x01) == 0)
{
P2 = _cror_(P2,1);
}
else if((key_v & 0x02) == 0)
{
P2 = _crol_(P2, 1);
}
}
/*void delayms(unsigned char ms) // 延时子程序
{
unsigned char i;
while(ms--)
{
for(i = 0; i < 120; i++);
}
} */