Driving an LCD with a PCF8574 over I2C
I'm mean with pins, even on the mbed, so I prefer to drive LCDs with an I2C bus rather than use six special-purpose pins for each LCD.
I've now hacked Simon Ford's LCD driver to drive an LCD via a PCF8574 Port expander using I2C. The program is here.
I'm hoping that someone better at C++ than me will merge Simon's code and mine into a common base class from which our concrete classes can inherit.
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