此工程组由两个工程组成：rs485_rcv.dpj和rs485_send.dpj.前者通过485接收数据，后者通过485发送数据。首先将485发送程序烧写到发送测试的平台中；用仿真器在接收用的平台运行接收程序，在VDSP的output窗口中观察接收到的数据。-This project group consists of two projects: rs485_rcv.dpj rs485_send.dpj. Former by 485 receiving data, the latter by 4