Completely turn off display. how to?

nugi · Post by **nugi** » Sun Sep 11, 2005 3:38 am

Hello~

I'm wondering how to make my psp turn off LCD display completely.
I've tried sceGuDisplay(0), but it does not turn off LCD completely.
sceGuDisplay(0) command make the screen be black.
But LCD back light seems to be turned on.
The display will completely turned off when display off timeout occurs (controlled by system.)

Please let me know how to turn off the display completely.
Thank you~

adresd · Post by **adresd** » Sun Sep 11, 2005 11:07 pm

hold the display button for a few seconds and it will power down the display, leaving your code still running.

This has been tested in PSPMediaCenter.

press it again to get the display back :)

Post by **mrbrown** » Mon Sep 12, 2005 5:24 am

adresd wrote:hold the display button for a few seconds and it will power down the display, leaving your code still running.

This has been tested in PSPMediaCenter.

press it again to get the display back :)

He was asking about how to turn off the screen using code.

I think you can use scePowerTick() to do what you want. See psppower.h in PSPSDK.

jockyw2001 · Post by **jockyw2001** » Mon Feb 26, 2007 2:00 am

Is there a sceKernelPowerTick() function as well?
What's the difference between them?

adrahil · Post by **adrahil** » Mon Feb 26, 2007 3:05 am

set the display enable bit to 0 in the bc10* address :)

SilverSpring · Post by **SilverSpring** » Tue Feb 27, 2007 9:55 pm

sceDisplaySetBrightness(0, 0) will turn the backlight off (screen will still be there, just no backlight). If you want to completely disable the screen, you could try sceDisplayDisable().

adrahil · Post by **adrahil** » Wed Feb 28, 2007 5:05 am

And sceDisplayEnable() to turn it on again ;)

atari800 · Post by **atari800** » Fri Jun 22, 2007 11:09 am

Super noob - so please forgive me

I am trying to get sceDisplayEnable() and sceDisplayDisable() to work.
have tried -lpspdisplay_kernel & -lpspdisplay_driver and both together
Even tossed in:
#include "pspdisplay_kernel.h" (driver too)

At best it compiles but when it loads - it locks up psp

I upgraded PSPtoolchain (svn)
This made the compiles smaller but didnt help me with my problem

Does someone have advice or an example?

Thanks in advance

Art · Post by **Art** » Sun Jun 24, 2007 4:14 pm

did you try

Code: Select all

sceDisplaySetBrightness&#40;0, 0&#41;

as suggested?
It works for me.

ulysse31 · Post by **ulysse31** » Mon Jun 25, 2007 6:16 pm

Did you try to call int sceDisplaySetFrameBuf(NULL,0,anything,anything)?

sakya · Post by **sakya** » Mon Jun 25, 2007 11:49 pm

Hi! :)

Art wrote:did you try
Code: Select all
sceDisplaySetBrightness&#40;0, 0&#41;
as suggested?
It works for me.

Since I'm interested in both sceDisplaySetBrightness and sceDisplayDisable can you please explain what's mandatory to use these functions?
I tried to write a simple program that uses sceDisplaySetBrightness but it crash as the function is executed.

I included pspdisplay_kernel.h, added -lpspdisplay_driver to LIBS in makefile (and updated my toolchain) and made the program run in kernel mode but sceDisplaySetBrightness doesen't seem to work.

What I'm doing wrong?
Can someone provide a little example for both sceDisplaySetBrightness and sceDisplayDisable?

Many thanks
Ciao
Sakya

youresam · Post by **youresam** » Tue Jun 26, 2007 4:20 pm

I am also having trouble using that function.

Art · Post by **Art** » Tue Jun 26, 2007 4:27 pm

Chuck this in your program with your other defines

Code: Select all

#define sceDisplaySetBrightness sceDisplay_driver_9E3C6DC6 
void sceDisplay_driver_9E3C6DC6&#40;int a0,int a1&#41;; /*a0 0-100,a1 = 0/1 &#40;set to 0&#41;*/

libs I'm using in a program with it working are:

Code: Select all

LIBS = -lpspaudiolib -lpspaudio -lpspdebug -lstdc++ -lpsphprm_driver -lpspusb -lpspusbstor -lpsprtc -lpspvfpu -lpspgum -lpspgu -lpsppower -lpng -lz -lm -lpspdisplay_driver

I don't know which are required sorry, but some there are obviously not.
Art.

youresam · Post by **youresam** » Wed Jun 27, 2007 6:45 am

undefined reference to `sceDisplay_driver_9E3C6DC6'

atari800 · Post by **atari800** » Wed Jul 11, 2007 12:32 am

I added -lpsppower -lpspdisplay_driver to my LIBS in the makefile
when I have sceDisplayEnable or scePowerTick or anything like this - if the program is in Game150 or GAME (kernel set to 1.50) - blank screen when it starts and I need ot reboot PSP to break out
if it is in Game340 - I get The Game could not be started - (8002013c)

weltall · Post by **weltall** » Wed Jul 11, 2007 10:10 pm

youresam wrote:undefined reference to `sceDisplay_driver_9E3C6DC6'

that was replaced with the name of the function
#endif
#ifdef F_sceDisplay_driver_0016
IMPORT_FUNC "sceDisplay_driver",0x9E3C6DC6,sceDisplaySetBrightness
#endif
#ifdef F_sceDisplay_driver_0017
IMPORT_FUNC "sceDisplay_driver",0x31C4BAA8,sceDisplayGetBrightness
#endif

http://svn.ps2dev.org/filedetails.php?r ... rev=0&sc=0