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by jakeh12
Sat Jan 26, 2019 3:42 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

Re: rpi-backlight: Control over display brightness and power

when I use the command $rpi-backlight down the terminal says: ERROR: '/sys/class/backlight/rpi_backlight/bl_power' does not exist/insufficient permissions. What do I need to do next many thanks! J It’s been a while since I touched this utility. If you run “sudo rpi-backlight down” (or “sudo ./rpi-b...
by jakeh12
Thu Dec 06, 2018 6:10 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

Re: rpi-backlight: Control over display brightness and power

Hello, Thanks for writing this very nice little software. :D But I'd like to dim my display very low, and You have set a min value that is not zero. Can You tell me how possibly to lower the min value to maybe zero ? Or maybe reveal how You manipulate the display backlight system ? Carl Johan Hi Ca...
by jakeh12
Mon Apr 03, 2017 2:52 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

Re: rpi-backlight: Control over display brightness and power

CyberCreator wrote:Jake,

is there a way t control the screen brightness on WIndows 10 IOT core?

Regards
Cyber
Unfortunately, this solution is for Linux only. I am not familiar with Windows 10 IOT on RPi.
by jakeh12
Wed Jun 01, 2016 2:44 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

Re: rpi-backlight: Control over display brightness and power

I might have to change the program. I assumed all the versions have the same parameters brightness-wise.
by jakeh12
Sun May 15, 2016 6:28 pm
Forum: Beginners
Topic: Sleep Mode - and or turn off backlight?
Replies: 202
Views: 89106

Re: Sleep Mode - and or turn off backlight?

Unfortunately, a library and tool developer doesn't have the luxury of "looking at the board". The software they write needs to work as well as it can with all models, and that usually requires: being able to differentiate somehow, and being able to indicate to programs using your tools and librari...
by jakeh12
Sat May 14, 2016 9:23 pm
Forum: Beginners
Topic: Sleep Mode - and or turn off backlight?
Replies: 202
Views: 89106

Re: Sleep Mode - and or turn off backlight?

tonyhansen wrote:Is there any way to tell via software which version of the official screen is in use?
Not a one that's for sure but if you can control the brightness then it's a V1.1 or V2.0. if you can only control on off states, it's a V1.0. The easiest way is to look for it on the display board pcb.
by jakeh12
Sat May 14, 2016 4:46 pm
Forum: Official Foundation Display
Topic: Official drawing dimensions for the 7" touch screen display?
Replies: 13
Views: 20238

Re: Official drawing dimensions for the 7" touch screen disp

vdesmedt wrote:Am I the only one not finding the radius of the rounded corner of the lens ?
Hi, I made couple covers. It appears to be radius close to 7 mm, but I just eyeballed it.
by jakeh12
Sat May 14, 2016 3:21 pm
Forum: Beginners
Topic: Sleep Mode - and or turn off backlight?
Replies: 202
Views: 89106

Re: Sleep Mode - and or turn off backlight?

I did some current measurements with Raspberry Pi 3 and the V2.0 touchscreen and the current consumption of the display board in "off" state stayed around 90 mA (which is still a lot for "off" mode). Keep in mind the Display board nor the Raspberry Pi computer were not designed for mobile purposes. ...
by jakeh12
Thu May 12, 2016 10:49 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

Re: rpi-backlight: Control over display brightness and power

Hi guys, sorry I am replying late, I have been very busy lately. Thank you, texy, for mentioning that it only works on 2.0 and possibly on 1.1 display board. Could somebody test if the off and on works on 1.0? (Program does not run if any of the two config files for power and brightness are missing)...
by jakeh12
Fri Apr 29, 2016 6:08 am
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15163

rpi-backlight: Control over display brightness and power

Hello everybody! I just wrote a simple program that can control the brightness and power state of the official touchscreen display. I though it might come handy if you need a simple interface for controlling such stuff. https://github.com/jakeh12/rpi-backlight COMPLETE FUNCTIONALITY ON DISPLAY BOARD...

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