本代码是基于C8051f020单片机的时间延迟系统程序，主要实现功能是对生理信号的采集AD转换后，储存500MS的信号数据，然后经过DA转换输出，也可通过串口直接输出数字信号。实现延迟500MS模拟信号的作用-This code is based on the time delay C8051f020 SCM system program, the main feature is the collection of physiological signals after AD conversion, storage, 500MS signal data, and then through the DA converter output can also be directly output through the serial digital signal. Realize the role of the analog signal delay 500MS