lcd_44780
Another LGPL lcd driver library.
Supports screens of different sizes (up to 4 rows x 20 columns), 3 different interface types (standard 8-bit & 4-bit, plus 3-wire interface used by some modules that have CLK, DATA and SEL -- they use 74x164 or similar shift registers for a minimal interface).
For interfaces that support full R/W of display memory, scrolling is supported as well, and "virtual display width", which will scroll display sideways; like having a moving window over a larger text display.
* Dec 7 '04 -- minor update for 4-bit interface, needed for correct operation -- had done minor rev & forgotten to mask bytes read from display properly
* Dec 8 '04 -- bigger update; ended up using code extensively in a testing project and realizing it had a number of issues. New, improved bits to tweak timing/size tradeoff, some hand optimization and most importantly I actually tested it with a 4-line display and worked out bugs on that front.
As always, feel free to ask questions if you need help.
Another LGPL lcd driver library.
Supports screens of different sizes (up to 4 rows x 20 columns), 3 different interface types (standard 8-bit & 4-bit, plus 3-wire interface used by some modules that have CLK, DATA and SEL -- they use 74x164 or similar shift registers for a minimal interface).
For interfaces that support full R/W of display memory, scrolling is supported as well, and "virtual display width", which will scroll display sideways; like having a moving window over a larger text display.
* Dec 7 '04 -- minor update for 4-bit interface, needed for correct operation -- had done minor rev & forgotten to mask bytes read from display properly
* Dec 8 '04 -- bigger update; ended up using code extensively in a testing project and realizing it had a number of issues. New, improved bits to tweak timing/size tradeoff, some hand optimization and most importantly I actually tested it with a 4-line display and worked out bugs on that front.
As always, feel free to ask questions if you need help.