[lcd4linux] Powering the HD44780 from the Printer Port

[Mark E. <mj...@po...>]

In Reference to Directly Connecting a HD44780 Compatible LCD to a
Parallel Printer Port....

As far as I understand - it should be possible to power most displays
from the power given by the LPT Printer port. I'm not referring to the
back-light - just the display itself....

In order to do this - one would need to "Switch-On" one of the Control
Output pins first - before trying to initialise the Display.

By using the "BACKLIGHT" wiring command - I can get power to the LCD -
but this seems to happen AFTER the LCD has initialised.... which is then
a bit late... - ie - The display stays blank.

Any chance of a modification that first Powers up (eg a Pin called
"POWER") - and then sends all the initialisation stuff???

It should then be possible to then Power and Drive an LCD from only the
Parallel port.  

-- 
  .  .     ___. .__      Posix Systems - Sth Africa.  e.164 VOIP ready
 /| /|       / /__       mj...@po...  -  Mark J Elkins, Cisco CCIE
/ |/ |ARK \_/ /__ LKINS  Tel: +27 12 807 0590  Cell: +27 82 601 0496