Adding a 9th button to GPIO
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Hey everyone,
I just set up attractmode on my retropie and I'm having an issue trying to assign a 9th button to a hotkey. Before this, I was using recalbox which allowed for a hotkey on GPIO2 (PIN 3) for joypad1 and GPIO3 (PIN 5) for joypad2. When running jstest for either of my joypads, the buttons only allow for the joystick and 0-7 buttons. When I press my 9th button, jstest doesn't show that anything is happening. Does anyone know how I can enable this 9th button?
Thanks!
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@theRog05 not sure what you are using so i dont know if this helps as far as controls go, but for the hotkey you can set up something like your select button for the hotkey.
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@edmaul69 I'm using arcade buttons (2 joysticks and 18 buttons), all which are connected to the GPIO of the pie. Each "controller" is using a Joystick along with buttons A, B, X, Y, LT, RT, select, start, hk (9th controller button). If you are familiar with Recalbox, they allow that 9th button to be used as a hotkey. I understand that I could use select for the hotkey, but I already built the cabinet and have that 9th button for each controller; I don't want it to go unused. Both of my hotkey buttons are connected to GPIO2 (PIN3) and GPIO3 (PIN5) on the pie (which is the suggested configuration for RecalBox. If it's possible for RecalBox, I would think it should be possible for Retropie, I just can't figure out where I would need to make a change to allow for this.
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well if you cant figure it out just wire up two buttons to one gpio, then at least you have a working ninth button
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@spruce_m00se This would defeat the purpose of having another button to do something different. I would rather find out how to utilize the GPIO for another button.
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You need to install the hotkeybtn variant of mk_arcade_joystick, this isn't installed by the RetroPie installer as it isn't part of the main branch, but can be done manually from the command line. The instructions aren't clear on their git page, but I think this is the correct order.
git clone https://github.com/pinuct/mk_arcade_joystick_rpi/tree/customgpiohotkey
mkdir /usr/src/mk_arcade_joystick_rpi-0.1.5/
cd mk_arcade_joystick_rpi/
cp -a * /usr/src/mk_arcade_joystick_rpi-0.1.5/
dkms build -m mk_arcade_joystick_rpi -v 0.1.5
dkms install -m mk_arcade_joystick_rpi -v 0.1.5Once you have done this and restarted, I think that you should be OK, as it will upgrade the version already installed.
The reference is on the git page: https://github.com/recalbox/mk_arcade_joystick_rpi/tree/hotkeybtn
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@simonster said in Adding a 9th button to GPIO:
You need to install the hotkeybtn variant of mk_arcade_joystick
Thanks!!! I'll give this a shot tonight or this weekend and let you know how it goes.
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@theRog05 do both controllers have a 9th key or just one controller? If only one is it actually going to controller 1?here is something you could try. Set up the controller in emulationstation and choose select as your hotkey. Now open up /opt/retropie/configs/all/retroarch/autoconfig/NAMEOFYOURCONTROLLER.cfg and find the hotkey line and change it to the correct button number. I assume that would be 8. (Since buttons start with zero)
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Hi @edmaul69 , the problem is the standard GPIO driver only has 8 buttons and 4 directions per pad (equivalent of a SNES pad), you can add a 9th but it requires a fork of the standard driver that removes I2C support whilst installed, it appears that they were previously using this when using Recalbox (as GPIO 3 and 5 are the correct wirings for this in the driver) but the version included in RetroPie is the main branch and doesn't include support for the 9th button.
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@edmaul69 : I actually did try just adding an 8 to the .cfg file and that didn't work. As @simonster mentioned, mk_arcade_joystick needs the update to allow the hotkeybtn. I'll be trying this when I get home after work, as long as the wife doesn't have me doing anything else -___-
Thanks, guys. -
@simonster Unfortunately, the first line you mentioned above results in a "repository not found". I tried copying the files manually, but then when I run the 'dkms build' I get "Your kernel headers for kernel 4.9.35-v7+ cannot be found at /lib/modules/4.9.35-v7+/build or /lib/modules/4.9.35-v7+/source". I've tried updating the headers with "sudo apt-get install raspberrypi-kernel-headers", but that didn't work either. Any ideas what else could be wrong?
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It worked for me, but this was some time ago. Try the recalbox copy of the fork
git clone https://github.com/recalbox/mk_arcade_joystick_rpi/tree/hotkeybtnIf you have updated the kernel headers, I don't know why it wont compile.
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@simonster This also failed to find the repository. :/
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I just ran this command and it cloned successfully:
git clone https://github.com/recalbox/mk_arcade_joystick_rpi.git -b hotkeybtnI am trying to compile it at the moment (there are a few issues with the code), there is also the matter of the missing headers, so bear with me and when I get something I will update this thread.
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Hi @theRog05
How are you using kernel 4.9.35-v7+? I have just run an update in RetroPie-Setup and am still using kernel 4.4.50-v7+
Can you fill in the detail list in https://retropie.org.uk/forum/topic/3/read-this-first
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@simonster I've been working on this all day so far and started getting some other funky errors (probably from me messing around in there). So I decided to wipe the card and start fresh. Once I get my card loaded up, I'll give this a try again. Sorry, wish I saw this message before I went and formatted the card.
P.S. - Thanks for your continuous help on this!
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No problem, I can only assume you had run rpi-update at some point and ended up with a unstable beta kernel.
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@simonster I'm pretty sure I did run rpi-update at some point in the past 7 hours. haha. I do remember using kernel 4.4.50-v7+ and I was also wondering why 4.9.35-v7+ was being used. Oh well, starting fresh now. As soon as I get it loaded on the Pi, I'll follow your steps again to clone the hotkeybtn branch in the mk_arcade_joystick_rpi repo and see what I can come up with. Thanks again!
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I have just tried this method and it worked for me completely:
Install MK_Arcade_Joystick from the drivers in the retropie setup. Then exit Emulation Station by pressing F4
rm -r mk_arcade_joystick_rpi
git clone https://github.com/recalbox/mk_arcade_joystick_rpi.git -b hotkeybtn
sudo mkdir /usr/src/mk_arcade_joystick_rpi-0.1.5.1/
cd mk_arcade_joystick_rpi/
nano dkms.confchange the line that begins PACKAGE_VERSION to read
PACKAGE_VERSION="0.1.5.1"
Press Ctrl+X and then Y and Enter to exit and save changes
sudo cp -a * /usr/src/mk_arcade_joystick_rpi-0.1.5.1/
sudo dkms build -m mk_arcade_joystick_rpi -v 0.1.5.1
sudo dkms install -m mk_arcade_joystick_rpi -v 0.1.5.1 --forceOnce installed, restart the Pi using the following command
sudo shutdown -r -t 0 now -
@simonster Awesome. I'll give that a try when the card loads back up. And after I replace my sisters shock in her car. -____-
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