[Lcdproc] Patch: MtxOrb adjustable backlight and display detection
ethan.dicks at gmail.com
Tue Mar 31 04:53:41 UTC 2009
On Tue, Mar 24, 2009 at 4:04 AM, Markus Dolze <bsdfan at nurfuerspam.de> wrote:
> I have questions on how the Display On / Off and Set Brightness commands of
> Matrix Orbital displays work:
> 1. If I use the 'Display Off' command, does it just turns the
> backlight off like for older versions or does it completely turns
> the display off?
> 2. If the display's backlight is off, what happens if I issue a 'Set
> Brightness' command? Does the backlight stays off until a 'Display
> On' command is issued or does the backlight automatically turns on?
I've restored my dev environment to functionality and spent some time
tonight throwing some command strings at my LK204-7T-1U (the
recently-manufactured Matrix Orbital display with the built-in LEDs on
GPOs 1-6, the color backlight, and built-in keypad). Here's what I
I send "display off", the display goes off *and* the backlight goes
off. I had to send both a "backlight brightness" _and_ a "display on"
command to see chars again. It does not matter which is sent first,
but both have to be sent.
When the backlight is off sending a "set brightness" does not turn the
backlight on right away. It stays off until the "display on" is sent.
This is the only Matrix Orbital textual LCD I have (an "LKD"). My
other textual MO display is that VFD display that "doesn't like" the
newer LCD commands (but worked fine the last time I tested it as a
"VKD" type display).
I hope this is the sort of information you were looking for. Let me
know if you need anything other sequences of commands sent. Now that
I have my dev laptop back, it shouldn't take a week to get you an
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