forums.ps2dev.org

[Torch]

I want to prevent the PSP from going into standby when the power switch is pressed. But if I use scePowerLock and the power switch is flipped while locked, it will power off after scePowerUnlock, just like the SDK says.

How do I prevent this from happening? I don't want to keep the switch permanently locked either. I just need to lock it at a particular moment, but I don't want it to switch off on unlock if the button was pressed while locked.

[Pirata Nervo]

remapping the power button should work.
Like remapping it to the R button(I think it's possible to remap buttons) so then if the power button is pressed nothing happens as it has the same effect as the R button.
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[Torch]

[Pirata Nervo]

[Torch]

[Pirata Nervo]

Well, I am not sure but what checks the power switch is the Syscon chip right?
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[adrahil]

It is usually not a good idea to lock the power switch for most purposes... What are you trying to accomplish?


There is a way to cancel the suspend, which is returning -1 whenever you receive a suspend notification sysevent. I'd have to find the event specification though, I can't remember from memory what the ID is.

[Torch]

[adrahil]

Oh okay, not a bad idea... I'll try to find the correct way to do so, i'll post it sometime today.

[Pirata Nervo]

Cool, that would be nice :)
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[adrahil]

Okay, in order to stop the PSP from going into standby, you have to register a sysevent handler for mask 0x0000FF00, and add something like this into your code:

[Pirata Nervo]

k thanks :)
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[Art]

Good thinking... surprised it took two or three years for someone to think of it.
You could also turn off brightness on hold, and turn it back on off hold.
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If not actually, then potentially.

[Torch]

[Torch]

All finished, with anti suspend protection: http://forums.qj.net/showthread.php?t=141671

[J.F.]

I would appreciate it if you wouldn't try to redirect people to QJ, especially as you posted the thing on a download service anyway. I don't care if you post it there also, but don't make people here have to go there to get it. I'm trying to boycott QJ, and encouraging others to do so as well.

So that others don't need to go to QJ, here's the link:

http://ifile.it/694jmgv/hold_.v2.0.zip

[Torch]

[Pirata Nervo]

thanks Torch
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Upgrade your PSP

[J.F.]

[Torch]

[J.F.]

[Torch]

Oh, OK. Nice to know that. Will release here next time.

@adrahil
Where do you get information about the various sysevents and mask numbers etc. I can't seem to find anything about it anywhere.

[adrahil]

I had done quite a lot of work on them a long while ago, and back then comitted the pspsysevent.h file and sample into the SDK. The information I found on the specific sysevents is located in power.prx.


Yesterday I looked into the 4.01 power.prx, and there are only three main groups of sysevents issued by the PSP:

[Torch]

Cool. Are there any other useful sysevents?

Anyway to detect when the system enables the display and lcd backlight when you press a key while they're both turned off either due to idle, or by holding screen button?

I'd like to prevent it from turning on the display and backlight but the key press should still be processed by the system.

[adrahil]

The easiest way to prevent the user from turning on the screen is to hook the button handler in ctrl.prx directly... There also is sceDisplayGetBrightness to get the current brightness, and you can use the GPIO bits to check for display enable :)

No, there are no other sysevents... They don't use it as much.

[Torch]

[adrahil]

Well, then hook ctrl.prx and check if the display is disabled, and if so, mask the buttons :)

[Torch]

[adrahil]

Ah, I see what you mean. I don't think it is possible, as the PSP will enable the screen anyways. You might want to look in display.prx for a way to turn the screen off for a long while :)

[Torch]

In that case I'll simply disable the display with sceDisplayDisable and make brightness zero when required. The user will be able to operate the PSP but the display and backlight will remain off.

Theres a slight problem though, if the user presses the display button to turn on the screen, then the PSP goes to the "next" brightness level, instead of remaining at the same brightness level like when the display is manually turned off and turned on by holding the display button.

For this I think I'll have to hook the ctrl.prx functions, and check if the display button is pressed. If pressed while my program has programmatically turned off the display, it should mask it, and programmatically restore the previously stored brightness level. If the display is not currently programmatically turned off it should just ignore it.