c++ codebase to control analog to digital converter in Raspberry Pi
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c++ codebase to control analog to digital converter in Raspberry Pi

This small c++ codebase uses the wiringPi library to control a mcp300x analog to digital converter (ADC). You can use this as a standalone program, or embed it into your raspberry pi project.

Install steps

1) Install the build essential package
sudo apt-get install build-essential
2) Install wiringPi
cd someDir
git clone git://git.drogon.net/wiringPi
cd wiringPi && ./build
3) Clone and build this project
cd someDir
git clone https://github.com/flavio-fernandes/mcp300x
cd mcp300x && make


To use the standalone program, call ./mcp300x or copy it to a location used by your $PATH. The --help should give you all you need to know:

$ ./mcp300x --help
Usage: mcp300x [OPTION...] 
mcp300x, a simple program to read analog values from Mcp3002 or Mcp3008

  -2, --mcp3002              Using mcp3002 (default)
  -8, --mcp3008              Using mcp3008
  -c, --clock=gpioPin        Clock GPIO pin
  -d, --delay=milliseconds   Delay per sample (0 => none)
  -i, --digitaln=gpioPin, --mosi=gpioPin
                             Digital In GPIO pin (write command)
  -o, --digitalout=gpioPin, --miso=gpioPin
                             Digital Out GPIO pin (read values)
  -r, --repeats[=count]      Number of sample reads (0 => infinite)
  -s, --chipSelect=gpioPin   Chip Select GPIO pin

The default gpio pins are hard coded in main.cpp. Feel free to modify them to suit your needs.

In order to use the Mcp300x code, use the files located in the src directory. They should be self contained and easy enough to port over to your project. If not, please submit a pull request and help me make this better.

Last, but certainly not least, let me list a few additional links that were essential in the making of this repo: