编写程序实现用PIC18F**单片机的D口控制发光二极管循环右移位，实现追灯功能：先D8点亮，其次是D7点亮，……，D1点亮，然后D8点亮，……，周而复始循环进行,并使用ICD2仿真器进行程序的烧写和仿真调试。-Write a program to achieve control port with the PIC18F** microcontroller D light-emitting diode cycle right shift, chasing lights function: fir