第3个回答 2010-10-06
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit P3_2 = P3^2;
//---------------------------------------------------
void delay(uint ms)
{
uint i, j;
for(i = ms; i > 0; i--) for(j = 110; j > 0; j--);
}
//---------------------------------------------------
void main()
{
uchar Save_P2 = 255;
while(1) {
Save_P2 &= P2;
if (P3_2 == 0) {
delay(10);
if (P3_2 == 0) {
while(P3_2 == 0);
P1 = Save_P2;
Save_P2 = 255;
} } } }
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