介绍了基于RS485实现的PC机与单片机串行通信控制系统．通过RS485／RS232信号转换电路，PC机根据下位机的地址不间断采集下位机的数据，-Introduced a PC-based implementation and RS485 Serial Communication control system. Through the RS485/RS232 signal converter circuit, PC machine according to the following addre