本程序设计并建立了一个以STC（宏晶）51单片机为核心，带有A/D、D/A、扩展存储、按键输入、LED显示等功能的小系统，实现对心电信号的采集、回放、存储及简单的处理。详细功能介绍请见readme.txt-This program designed and established an STC (Acer Crystal) 51 single-chip microcomputer as the core, with A/D, D/A, the expansion of storage, inp