added parameters and debug gui to dbar4gun

[lowlevel-1989]

Now it can be configured from the RetroPie menu, and we have access to a debug gui.

Feature support

• Standard configuration for Wii sensor
• Only DolphinBar in mode 4
• 4 wiimote x Dolphinbar (very fast with a single bar)
• Generic wiimote
• Bluetooth
• wiimote with individual buttons
• tilt correction
• calibration two points
• calibration three points

driver: https://github.com/lowlevel-1989/dbar4gun

[joolswills]

Thank you for the changes - a lot of work. Cheers.

I'm unable to test currently - the only thing I saw on my phone is that maybe cmd_in wasn't declared as local. But I may be wrong as reviewing code on a phone isn't ideal.

Appreciate your leverage of the "could be documented better" RetroPie framework.

[lowlevel-1989]

Thank you for the changes - a lot of work. Cheers.

I'm unable to test currently - the only thing I saw on my phone is that maybe cmd_in wasn't declared as local. But I may be wrong as reviewing code on a phone isn't ideal.

Appreciate your leverage of the "could be documented better" RetroPie framework.

It's true, the variable was not assigned as local; I have updated it now. Thanks

[lowlevel-1989]

Hi, This is OK?

[joolswills]

Sorry for the delay.

I have rebased and squashed the requested fix into the first commit (with minor commit message changes). Thank you for the PR.