再分享一个数字万用表的源码， 这也是我从我朋友那里要过来的...

单片机P1口与4个按键连接，用于信号幅度和频率调节操作键。单片机P0、P2.7、P3.6(-WR)与DA0832、2个741(运放)连接构成波形信号输出电路。 编程使波形信号输出电路输出正弦波信号，并且可通过操作键调节信号的幅度和频率。幅度和频率调节级别从0~10，共11个等级。 -Singlechip P1 I connect with the four buttons for the signal amplitude and frequency adjustment operation keys. Singlechip P0, P2.7, P3.6 (-WR) and DA0832, 2 months 741 (operational amplifier) to connect constitute waveform signal output circuit. Programming so that waveform signal output circuit output sine wave signal, and can be operated keys adjust the signal amplitude and frequency. Amplitude and frequency adjustment level from 0 ~ 10, a total of 11 grades.

单片机控制LCD1602液晶显示的驱动程序-SCM LCD1602 LCD driver

c8051f的uart口的测试程序，用来测试c8051f单片机串口是否正常-UART c8051f the mouth of the testing procedures used to test whether the normal c8051f single-chip serial

《msp430应用系统开发典型实例》第8章程序代码- Msp430 typical examples of application systems development, Chapter 8 code

注册热键，STAITC接收键盘消息，向应用程序发送按键消息、文本-Register hotkey, STAITC receive keyboard message, send keystrokes to the application message, text

用C51语言开发，相当有趣，附详细文档及硬件电路图-with C51 language development, very interesting, with detailed documentation and hardware circuit

输入法，适用于单片机-input method, applied to SCM

sl811usb芯片与51的文件系统-a filesystem about USB chip sl811 and 51

PIC16F877单片机 Boot-Loader -PIC16F877 microcontroller Boot- Loader

80C51编写的看门狗程序，本程序是为了数字电压表的看们狗设计-80C51 watchdog prepared by the procedure, the procedure is to digital voltage meter to see who the dog design