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- #include<reg52.h>
- #include<intrins.h>
- #define uchar unsigned char
- #define uint unsigned int
- void delay(uint);
- uchar aa;
- void main()
- {
- aa=0xfe;
-
- while(1)
- {
-
- P1=aa;
- delay(500);//500毫秒
- aa=_crol_(aa,1);
-
- }
-
- }
- void delay(uint a)
- {
- uint i,j;
- for(i=a;i>0;i--)
- for(j=110;j>0;j--);
- }
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