Introduction - If you have any usage issues, please Google them yourself
Environment for running programs: The next bit machine: dsPIC30F6014A Host Computer: Serial RS485 chip debugging aids: MAX489 means of communication: PC,--- RS232 switch to RS485--- RS485 interface--- dsPIC30F6014A the content of communications: PC, send a string of characters (have agreed to " Enter" end) to the next crew, the next crew, after receiving no treatment returned to the PC.