#include <REGX52.H>标签:P3,LED,--,STC89C52,Delay,单片机,while,20,xms From: https://blog.51cto.com/nclx/5806280
void Delay(unsigned int xms) //@12.000MHz
{
unsigned char i, j;
while(xms)
{
i = 2;
j = 239;
do
{
while (--j);
} while (--i);
xms--;
}
}
void main()
{
while(1)
{
if(P3_1==0)
{
Delay(20);
while(P3_1==0);
Delay(20);
P2_0=~P2_0;
}
}
}