Sleep Mode for Gameboy Zero

[oliver]

Hi,
I'm going to build a Gameboy Zero, and would like to include a sleep switch to turn off the buttons and screen. I would hopefully use kite's newest board( http://market.sudomod.com/kites-super-all-in-one-board/) but am open to other options. When it's done, I hope to have a switch on it like the Nintendo 2DS. Please add any ideas you have or links to similar projects.
Thanks!
-oliver

[kite]

Hi My AIO will allow you to turn off the backlight, and wifi, but the main issue you're going to have is that the Pi doesn't have a sleep state.. you could certainly implement something that would downclock the pi, disable all running processes and hopefully save some power.. but it's not going to be the same as putting a DS (or even a phone) to sleep as they implement CPU sleep states to really save power (which the Pi does not have)!

[oliver]

Hi My AIO will allow you to turn off the backlight, and wifi, but the main issue you're going to have is that the Pi doesn't have a sleep state.. you could certainly implement something that would downclock the pi, disable all running processes and hopefully save some power.. but it's not going to be the same as putting a DS (or even a phone) to sleep as they implement CPU sleep states to really save power (which the Pi does not have)!

Would it be possible to make the buttons not work while sleep mode is activated, so the buttons couldn't get accidentally pressed? How would I turn off the backlights or disable the wifi? I don't have much raspberry pi experience, both with software and hardware so how would I disable the running processes? I really appreciate your help.
-oliver

[kite]

Would it be possible to make the buttons not work while sleep mode is activated, so the buttons couldn't get accidentally pressed? How would I turn off the backlights or disable the wifi? I don't have much raspberry pi experience, both with software and hardware so how would I disable the running processes? I really appreciate your help.
-oliver

Yes, .. the buttons, wifi, and backlight are all controlled by the ATMEGA32u4 (Arduino) so you'd need to make changes there (e.g. ignore all buttons unless it's a special combo) .. also setting the Bl pin low and the WIFI pin low will turn off the BL and wifi (will make sense when i release the code soon)..

As for the Pi side, you'll need to have a script that is run in the background and co-ordinating with the ATMEGA32u4 to make sure everyone is in sync.. again I have some code that I'll release that is currently doing the battery bar icon thing, which runs in the background and communicates to the ATMEGA (so you can reuse all those bits).

[oliver]

Yes, .. the buttons, wifi, and backlight are all controlled by the ATMEGA32u4 (Arduino) so you'd need to make changes there (e.g. ignore all buttons unless it's a special combo) .. also setting the Bl pin low and the WIFI pin low will turn off the BL and wifi (will make sense when i release the code soon)..

As for the Pi side, you'll need to have a script that is run in the background and co-ordinating with the ATMEGA32u4 to make sure everyone is in sync.. again I have some code that I'll release that is currently doing the battery bar icon thing, which runs in the background and communicates to the ATMEGA (so you can reuse all those bits).

Thanks for all the help with this, it should really help the battery last longer.