用PIC16F877A单片机的一组8个I/O端口连接LED发光二极管，让它们以跑马灯方式轮流闪烁发光。具体要求是：每个时刻只有一个LED被点亮，亮灯的位置以循环方式不停地移动，顺序为LED0→LED1→LED2→……LED7→全灭→LED0→LED1→……,每个LED被点亮的时间约为0.7s内，它将以8Hz左右的频率闪烁，即所谓“闪烁式跑马灯”。-PIC16F877A MCU, a group of eight I/O ports to connect the LED light-emitting diode, and let them take turns Marquee Flashing. Specific requirements are: every moment there is only one LED is lit, the position lights constantly on the move in a circular manner, the order of LED2 LED0 → LED1 → → ...... LED7 for → LED0 Quanmie → → LED1 → ... each time of about 0.7s LED is lit, it will be about 8Hz frequency flicker, namely the so-called " flashing marquees.