用P1口控制8个LED，按P3口输入信号的不同模式选择4种16次循环点亮方式，用软件延时实现1秒的扫描周期。将生成的HEX文件下载到实验板上验证-8 LED control port with P1 and P3 port input signal different modes to choose four kinds of 16 cycles lit way second scan cycle software delay. Will generate the HEX file is downloaded to the experimental board verification