LDE跑马灯

//	128 64 32 16   8 4 2 1
//255	1111 1111  	-0
//254	1111 1110  	-1
//253	1111 1101	-2
//251	1111 1011	-4
//247	1111 0111	-8
//239	1110 1111	-16
//223	1101 1111	-32
//191	1011 1111	-64
//127	0111 1111	-128

int main(){
    int p =0xff;
	int q=1,c=0,temp=p;
	while(1){
		if(p<=255){
			printf("%d\n",temp);		
			temp=p-(q<<c++);
			if(temp<127){
				temp=p;
				c=0;
                printf("%n");
			}
		}		
    }
}

stc89c52

 运行结果