hc-sr501模块接的p2^1接口,写的程序高电平led4亮,低电平led3亮,结果从led2看红外的模块有高低电平变化,但是从结果上看始终是高电平,led4常亮
#include "reg52.h"
typedef unsigned int u16;
typedef unsigned char u8;
sbit H=P2^1;//定义红外管脚
sbit LED3=P2^2;//定义LED3管脚
sbit LED4=P2^3;//定义LED4管脚
void main()
{
while(1)
{
if(H==1)
{
LED3=1;
LED4=0;
}
else
{
LED3=0;
LED4=1;
}
}
}