Hi, On 26 August 2013 14:11, Denis Maros <[email protected]> wrote:
> Yes, i'm talking about 2*20 character LCD display connected to 24 pin > parallel port on motherboard. > I've tried to access this device simply via this command: > # echo "Test" > /dev/lpt0 > If it's one of the common Hitachi-compatible LCDs (and it almost certainly is) https://en.wikipedia.org/wiki/Hitachi_HD44780_LCD_controller You can't just send characters at it like that; the dance is a little more complicated. Strongly recommend reading the datasheet that came with the device. You shouldn't need a kernel driver. As long as you've got it wired up correctly you should be able to do everything in userspace. John
