#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int

uint table[] = {0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f};

void delay(void) {
	uint a = 50000;
	while(a--);
}

void main() {
	int i = 0;
	while(1) {
		for(i = 0; i < 8; i++) {
			P0 = table[i];
			delay();
		}
		for(i = 7; i >= 0; i--) {
			P0 = table[i];
			delay();
		}
		
	}
}
 

  其實學微控制器也是看林峰的視訊的：《林峰帶你征服嵌入式》！直接上程式碼吧。