多路数据采集控制器,A/D转换和D/A转换,系统分为PC机和单片机系统两部分。从系统图上可见，本系统的硬件部分较简单且成熟：其中D/A转换器选用0832，采用文献［1］的电路实现双极性电压输出，后接跟随器改善带负载能力。存储器选用62256。MAX232实现电平转换。本系统的关键是软件部分，特别是通讯的实现。-Multi-channel data acquisition controller, A/D conversion and D/A converter, the system is divided into PC and single-chip microcomputer system in two parts. Map can be seen from the system, the system' s hardware and the maturity of some of the more simple: one D/A converter 0832 selection, the use of the literature [1] The circuit of bipolar voltage output, followed by follower with load capacity to improve. 62,256 selected memory. MAX232 level converter to achieve. The key is the system software, in particular the realization of communication.