摘要
论述由ＩＢＭ—ＰＣ系列微机构成的数据采集系统的硬件构成和软件组成．硬件结构以“ＡＤ５７４Ａ”１２位ＡＤＣ和８２５５Ａ并行接口芯片为主．软件程序通过修改ＰＣ机原ｐｏＴ０８，不改变原微机硬件组成便可实现不同采样频率要求的数据采集系统①．
This paper deals with the component of the hardware and software of the data sam pling system of the IBM--PC.12 bit ADC AD574A and parallel port 8255A are the mainparts of the hardware.The software can realize the various sampling frequency by us ing of changing the old PC INT-08 interruption program,and the PC hardware is not af fected.
关键词
A/D转换
PC总线
定时器
A / D converter
PC-bus interruption
timer
