This is a library for communication with AD5253 and AD5254 quad 64-/256-position I2C Nonvolatile Memory Digital Potentiometers. The features implemented are based on the datasheet provided by Analog Devices.
To use these, instantiate either an AD5253 or an AD5254 object (the main difference is in the error checking) and call obj.initialize(AD_addr) to initialize communication with the device. The AD525x series potentiometers have a 5 bits of their 7-bit I2C address hard-coded as 0x2C (0d44), and the two lowest bits can be programmed by pulling the AD0 (pin 4) and AD1 (pin 16) lines either high or low. The initialize method of each AD525x object is instantiated with the 2-bit AD1 AD0 address of the device - do not specify the hard-coded portion of the address, as that is already taken into account.
Due exception handling with try and catch are too costly to be used on microcontrollers, in the event of an error in a member function, the private variable err_code (which can be queried using AD525x::get_err_code()) is set to one of the error codes defined in AD525x_Errors.h. A small companion library, AD525x_ErrorStrings.h is provided for interpreting the error codes into human readable strings. It is separated out from the main library to minimize unnecessary resource costs.
This code is licensed under the MIT license. If you would like to use it under a different license or you would like a waiver of the requirements of the MIT license, contact me.