给出了以89s52为主控芯片的下位机系统的软硬件设计，并给出了上位机操作软件和与下位机的通信协议。
The software and hardware design of the substrate control system which USES 89s52 as the main control chip, the PC's operating software and the communication protocols are given in this paper.
下位机利用凌阳十六位单片机SPCE061A和CAN总线控制器SJA1000实现电力参数的采集、控制输出，及通信协议转换。
Lower machine realizes the collection, control output of power parameter and communication protocol conversion by using the 16-bit MCU named SPCE061A of Sunplus Company and CAN bus controller SJA1000.
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