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#include<reg51.h>
#include <intrins.h>
void delayms(unsigned char ms)
{
unsigned char i;
while(ms--)
{
for(i = 0; i < 120; i++);
}
main()
{
unsigned char LED;
LED = 0xfe;
P1 = LED;
while(1)
{
delayms(250);
LED = _crol_(LED,1); //循環(huán)右移1位，點亮下一個LED 此函數(shù)位庫函數(shù)
P1= LED;
}
}
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