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ADS7924

Linux interrupt driven kernel driver for ADS7924 2.2 V, 12-Bit, 4-Channel, MicroPOWER Analog-to-Digital Converter With I2C Interface from Texas Instruments

Datasheet

To optain a detiled description about this module you need Doxygen.

  1. Change in directory ./doc
  2. Call doxygen
  3. Open the file ./doc/html/index.html with your preferred web browser.

Apperring the drivers device-files in the directory /dev:

adc<0-n><A-B>[0-3]
 |   |    |    |
 |   |    |    +- Channel number
 |   |    +------ I2C-address (chip-number) A = 0x48; B = 0x49
 |   +----------- Number of I2C-bus
 +--------------- Prefix

Where adc<0-n><A-B> is the interface for registers which concerns the whole chip,

and adc<0-n><A-B>[0-3] one of the four channels.

In the directory ./src/test you can find the source code for a demo- and test- application to compile it you need additently the command line-parser which you can obtain here.

Another helpful tool for developing Linux drivers can be found here.

This code is a few years old since I last updated it. You probably need to customize it a bit to the latest Linux kernel source.

A few words about my coding style.

Yes, I know my code is not Linux-style. For example, I open curly braces in a new line, and don't use tabs except in makefiles. So the code can never officially become part of the Linux kernel, which I never planned to do. However, since I am the only author of the code so far and have maintained it alone so far, I keep the code in a form that is most pleasing to my eyes. I ask you to respect that as well, I respecting the coding style of others as well. E.g.: https://github.com/UlrichBecker/EDT-Polytouch-linux-driver

There is a saying in Germany that means: "Einem geschenkten Gaul schaut man nicht ins Maul." ("You don't look a gift horse in the mouth.")

;-)