Found a fix for deadzone issue on UAE4ARM (Amiga)

[GrethTom]

By default, there is no deadzone parameter in UAE4ARM and looking at the code it just registers anything off 0 to be a movement (for analogue stick usage), queue a frustrating time trying to control games. Looking at most other emulators they have 4000 as the default. Found a way of updating it so it is now finally usable with an analogue joypad (like the 360 controller). To update you need to do the following.

1. Make sure you exit EmulationStation so you are at the command prompt (this can be done by hitting F4).

2. Type the following:
   cd RetroPie-Setup
   sudo ./retropie_packages.sh uae4arm sources

3. Once the last command is complete, enter the following:
   sudo nano /home/pi/RetroPie-Setup/tmp/build/uae4arm/src/od-Pandora/joystick.cpp

4. A little way down the file you will find the following 4 lines:
   if ((hat & SDL_HAT_RIGHT) || dpadRight || SDL_JoystickGetAxis(joy, 0) > 0) right=1;
   if ((hat & SDL_HAT_LEFT) || dpadLeft || SDL_JoystickGetAxis(joy, 0) < 0) left=1;
   if ((hat & SDL_HAT_UP) || dpadUp || SDL_JoystickGetAxis(joy, 1) < 0) top=1;
   if ((hat & SDL_HAT_DOWN) || dpadDown || SDL_JoystickGetAxis(joy, 1) > 0) bot=1;

Change the last 0's of each line to the following (either 4000 or -4000)
if ((hat & SDL_HAT_RIGHT) || dpadRight || SDL_JoystickGetAxis(joy, 0) > 4000) right=1;
if ((hat & SDL_HAT_LEFT) || dpadLeft || SDL_JoystickGetAxis(joy, 0) < -4000) left=1;
if ((hat & SDL_HAT_UP) || dpadUp || SDL_JoystickGetAxis(joy, 1) < -4000) top=1;
if ((hat & SDL_HAT_DOWN) || dpadDown || SDL_JoystickGetAxis(joy, 1) >4000) bot=1;

5. Save the file using Control X then Y to the prompt.

6. Type the following:
   sudo ./retropie_packages.sh uae4arm build

7. Once complete, copy the file 'uae4arm' from /home/pi/RetroPie-Setup/tmp/build/uae4arm/ to /opt/retropie/emulators/uae4arm/ (I do this via FTP software, not sure on the unix commands here)

8. Reboot then launch Amiga emulator UAE4ARM as you would normally.

Let me know how you get on.

[BuZz]

Nice - you should consider sending the changes upstream too - https://github.com/Chips-fr/uae4arm-rpi (and please use markdown to format posts - http://commonmark.org/help/)

[GrethTom]

Great idea. I have now joined GitHub and suggested this as a change to the code.

[GrethTom]

So just to follow-up, this code change was updated into UAE4ARM and getting the latest Binary, includes this fix. Very chuffed to be part of the development of UAE4ARM, even if it's a very tiny element.

[dankcushions]

Great work :)