51 MCU using PCF8591 to realize the digital to analog conversion (I2C) is 1 using PCF8591 serial A/D converter to convert the input analog voltage potentiometer, and in the digital tube LED display voltage values (accurate to 2 decimal places), the realization of digital voltage meter function. 2 in the basic part of basis, the realization of a fixed frequency Fang Bo using D/A channel PCF8591 (10~50Hz frequency range), and the output in a virtual oscilloscope.

3数字电压表\3.PWI
...........\i2c.c
...........\I2c.DSN
...........\i2c.h
...........\I2c.PWI
...........\I2C.uvgui.MyPC
...........\I2C.uvopt
...........\I2C.uvproj
...........\ISIS.dmp
...........\Last Loaded I2c.DBK
...........\Last Loaded uart.DBK
...........\.istings\I2C.m51
...........\main.c
...........\Objects\I2C
...........\.......\I2C.build_log.htm
...........\.......\I2C.hex
...........\uart.PWI
...........\设计.DSN
...........\设计.PWI
...........\Listings
...........\Objects
3数字电压表

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