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Rockboy buttons issue creative zen

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elezzar:
i've been playing around with rockboy lately on the creative zen (mines the 8gb version if thats important) but i've noticed it doesn't accept multiple button inputs at once, as in i will hold what i configured the D-pad for and press A or B and it will interrupt the D-pad and stop even though im still holding the button (makes  about anything other than pinball or pokemon impossible to play) i have no idea why this happens. i don't know if its a rockboy bug in general or just this device specifically but if anyone has any insights or solutions to this i would love to hear :)

saratoga:
Looking at the button driver it looks like the hardware can only read one button at a time due to shared input pin.

elezzar:
oh thats unfortunate... is there a way to work around this with an external USB controller or something like that?

Bilgus:
I emulated some multi-button presses for the xduoo3
https://gerrit.rockbox.org/r/c/rockbox/+/2744

not having the hardware in hand I can't say but maybe a similar idea would work
https://gerrit.rockbox.org/r/c/rockbox/+/2744/6/firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c#115
 

elezzar:
possibly, idk if there is a software workaround though the power down button is definitely of either higher priority or a different pin though from what i can tell. still wouldn't be much help being that we would need 2 extra buttons for rockboy to be compatible and we might even need 6 extra if gameboy accepts multiple D-pad inputs at once im not really sure about that

my biggest question now is just whether or not the creative zen has OTG support, kinda seems unlikely

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