一、LED灯点亮
根据51开发板原理图可知P2口是控制LED灯的,1为高电平(不亮),0为低电平(亮)
LED亮起代码
include <REGX52.H>
void main(){
while(1)
{
P2=0x00;
}
}
LED流水灯
include <REGX52.H>
unsigned char i;
//延时子函数
void Delay(unsigned int xms)
{
unsigned char i, j;
while(xms--)
{
i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}
}
void main(){
while(1)
{
for(i=0;i<8;i++){
P2=~(0x01<<i);//流水灯控制
delay(1);
P2=0xff;
delay(1);
}
if(i>8)i=0;
}
}