a kernel level Linux Device Driver for a 16x2 character LCD (with HD44780 LCD controller) with 4 bit mode.
A demo video is available here: https://www.youtube.com/watch?v=icP9ckrTLKc
This is a kernel level Linux Device driver to control a 16x2 character LCD (with HD44780 LCD controller) with 4 bit mode. The LCD is interfaced with a micro-controller using GPIO pins. The program has been tested on Linux 3.8.13 debian, and the target board is Beaglebone Black ARM micro-controller.
This project is a continuation of my user level program, which was not originally developed with Linux in mind. The project has been developed in a form of loadable kernel module, cross-compiled in a Desktop PC.
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The datasheet was found from here: https://www.sparkfun.com/datasheets/LCD/HD44780.pdf
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And the LCD was purchased from here: http://www.amazon.com/gp/product/B004MGXOUQ/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Reference[1] HD44780U (LCD-II), Hitachi Ltd., Tokyo, Japan, 1998.