Xin-Mo
Making RetroPie identify 2 players instead of one with the Xin-Mo
Add the following to /boot/cmdline.txt -- just add a space to the end of the existing entry, so it is all on one line):
usbhid.quirks=0x16c0:0x05e1:0x040
The first two numbers are the vendor ID 16c0 and product ID 05e1.
If you have a Juyao Dual Arcade, it is the same device, but the vendor ID is 0314 and the product ID is 0328:
usbhid.quirks=0x0314:0x0328:0x040
An alternate configuration method is to create a kernel module configuration file for the usbhid driver. Create a new file by running sudo nano /etc/modprobe.d/rp-usbhid-quirks.conf (the file name is not important, but the file extension is), with the contents
options usbhid quirks=0x0314:0x0328:0x040
You can find your Vendor/Product IDs by running the lsusb command from the command line.
More details in these threads
- http://blog.petrockblock.com/forums/topic/autofire-on-the-axis/page/5/#post-104325
- http://blog.petrockblock.com/forums/topic/autofire-on-the-axis/page/5/#post-104433
- http://blog.petrockblock.com/forums/topic/how-to-get-xin-mo-dual-arcade-working-with-retropie-easy-guide/
Older Info
If you have troubles with the Xin-Mo driver you can find a guide for patching the driver at http://ithink.ch/blog/2013/09/08/patching_the_linux_kernel_to_install_the_xin-mo_dual_arcade_driver_on_a_raspberry_pi.html.
The troubles I had configuring a joystick with the Xin-Mo controller, besides the previous one:
MAME4ALL-PI (MAME)
The MAME emulator only reads 16 buttons of the joysticks, so only use the first 16 button inputs of the controller (from 0 to 15). So if you don't have many buttons (6 by player, 2 Start and 2 service) work alright. You can make the MAME4ALL-PI to use more buttons by modifying the source and compiling it, but it's not an easy task.
PIFBA (NeoGeo and other Arcade)
The emulator expects one controller for each player (e.g. 2 UBS controllers), as the Xin-Mo is detected as only one, the PIFBA only loads the Player 1 controls (no matter what you have on the fba2x.cfg). So in order to make it work I had to edit the source (not in the bets way, but it works), the following files: * /rpi/fba_player.cpp * /rpi/gp2xsdk.cpp * /rpi/gp2xsdk.h (maybe its not required, only for the default values)
fba_player.cpp: To force do_keypad() to create 2 FBA_KEYPAD, I forced joyCount=2, so the for loop executes 2 times
gp2xsdk.cpp: In pi_joystick_read(int which1) I changed all joy_buttons[1] to joy_buttons[0], because both players are in the first joystick (0). Also, the movements for the second joystick axis (joyaxis_LR_2 and joyaxis_UD_2) are not defined, so you have to add them in pi_process_events (void), inside case SDL_JOYAXISMOTION: like this:
case SDL_JOYAXISMOTION: if(event.jaxis.axis == joyaxis_LR) { if(event.jaxis.value > -10000 && event.jaxis.value < 10000) joy_axes[event.jbutton.which][joyaxis_LR] = CENTER; else if(event.jaxis.value > 10000) joy_axes[event.jbutton.which][joyaxis_LR] = RIGHT; else joy_axes[event.jbutton.which][joyaxis_LR] = LEFT; } if(event.jaxis.axis == joyaxis_UD) { if(event.jaxis.value > -10000 && event.jaxis.value < 10000) joy_axes[event.jbutton.which][joyaxis_UD] = CENTER; else if(event.jaxis.value > 10000) joy_axes[event.jbutton.which][joyaxis_UD] = DOWN; else joy_axes[event.jbutton.which][joyaxis_UD] = UP; } if(event.jaxis.axis == joyaxis_LR_2) { if(event.jaxis.value > -10000 && event.jaxis.value < 10000) joy_axes[event.jbutton.which][joyaxis_LR_2] = CENTER; else if(event.jaxis.value > 10000) joy_axes[event.jbutton.which][joyaxis_LR_2] = RIGHT; else joy_axes[event.jbutton.which][joyaxis_LR_2] = LEFT; } if(event.jaxis.axis == joyaxis_UD_2) { if(event.jaxis.value > -10000 && event.jaxis.value < 10000) joy_axes[event.jbutton.which][joyaxis_UD_2] = CENTER; else if(event.jaxis.value > 10000) joy_axes[event.jbutton.which][joyaxis_UD_2] = DOWN; else joy_axes[event.jbutton.which][joyaxis_UD_2] = UP; } break;