单片机学习-利用intrins.h中的_crol_和_cror_进行流水灯位移

#include <reg52.h>#include <intrins.h>typedef unsigned char u8;typedef unsigned int u16;void delay(u8 c) //误差 0us{unsigned char a,b;for(;c>0;c--)for(b=142;b>0;b--)for(a=2;a>0;a--);}void main (){u8 i;while (1){u8 aa;aa=0xfe;for(i=0;i<8;i++){P0=aa;delay(100);aa=_crol_(aa,1);}aa=0x7f;for(i=0;i<8;i++){P0=aa;delay(100);aa=_cror_(aa,1);}}}