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sumotoy
11-18-2012, 12:14 AM
I will post pretty soon an efficent library for drive Hexa LCDs (same commands of LiquidCrystal) but use just 2 or 3 wires. It's based on a small hardware builded around MCP23s08 (for SPI) or MCP2308 (for I2C).
It can be used on Arduino 0.23/1.x IDE and has code optimizations for teensy3.

keithg
11-18-2012, 12:27 AM
I use this library with the PCF chip.
https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home

Works great for I2C for me, anyway. Does not use the MCP chip, though the adafruit library does.
https://github.com/adafruit/LiquidCrystal

Hopefully, these are interesting and you may be able to fork or contribute to what is already there instead of a new library...

Keith

sumotoy
11-18-2012, 11:45 AM
I'm using a different way that is much faster and library should support even a shift register 595 option. I know those libs but choose to redesign for optimize speed and support I2C as well as hardware SPI or SPI. At list I can include the PCF chip, should useful because his address it's outside range of MCP.

sumotoy
10-24-2013, 08:57 PM
https://github.com/sumotoy/LiquidCrystalNewV2