Wednesday, September 24, 2014

Arduino DDS Signal Generarator - Modifications

              Well, I was thinking about how to reduce the "wire mesh" from the Signal Generator. One option is to interface the 20x4 LCD using an I2C expander. I can use the MCP23017 16I/O or a PCF8574 from NXP. Decision is to go ahead with the PCF8574. 

Next target is to improve the Keypad handling.   Here also I can use the same chip to handle a 4x4 matrix keyboard

There are libraries available for I2C LCD and Keypad targeting the PCF8574.

Next experiment is to evaluate the libraries before making any change to the code...:)


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