Tut needed for EMS Top Gun on Retropie

[SirMcFrosty]

Hi Ansa89

I know it is a long time ago you made this driver. But it would be great if you could help me to install this driver on my Retropie. I could create a .ko file out of it, but now i am lost as i am not a linux expert. a make install didnt work and any other way do go further this problem i dont know.

Please help

Thanks in advance

[Ansa89]

Hi @SirMcFrosty,
I'm very sorry for the late reply, but in the last years I had been very busy (and even now I don't have spare time for my hobbies).

Anyway, I would be very happy to assist you if this issue is still relevant for you (if it doesn't just tell me so I can close it).
Apparently you compiled the kernel module without errors, so you can just copy/paste it in some location inside kernel modules directory and run depmod:

mkdir -p /lib/modules/`uname -r`/misc
cp /path/to/lcdtopgun.ko /lib/modules/`uname -r`/misc
depmod -a

To check if Retropie sees the new module you can try to load it:

modprobe lcdtopgun

Please note that all actions should be run as root.

[SirMcFrosty]

Thanks for your answer. The issue is still relevant but at the moment i am a bit busy while moving into a new home and such stuff. So it would be good to leave it open so i can come back to you with that issue when i am again working on retropie stuff and testing your hint you gave me. With best regards Sir Mc Frosty Von: Ansa89 <[email protected]> Gesendet: Mittwoch, 8. Mai 2019 13:35 An: Ansa89/topgun-linux-driver <[email protected]> Cc: SirMcFrosty <[email protected]>; Mention <[email protected]> Betreff: Re: [Ansa89/topgun-linux-driver] Tut needed for EMS Top Gun on Retropie (#1) Hi @SirMcFrosty <https://github.com/SirMcFrosty> , I'm very sorry for the late reply, but in the last years I had been very busy (and even now I don't have spare time for my hobbies). Anyway, I would be very happy to assist you if this issue is still relevant for you (if it doesn't just tell me so I can close it). Apparently you compiled the kernel module without errors, so you can just copy/paste it in some location inside kernel modules directory and run depmod: mkdir -p /lib/modules/`uname -r`/misc cp /path/to/lcdtopgun.ko /lib/modules/`uname -r`/misc depmod -a To check if Retropie sees the new module you can try to load it: modprobe lcdtopgun Please note that all actions should be run as root. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1 (comment)> , or mute the thread <https://github.com/notifications/unsubscribe-auth/AJLVYFJIDX6DCLTWPJPVXKTPUK3F5ANCNFSM4FKFAGVA> . <https://github.com/notifications/beacon/AJLVYFLRRVYB3WBKI4RHLKDPUK3F5A5CNFSM4FKFAGVKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODU53FMI.gif>

[Ansa89]

Ok, no problem, take your time.

[OrionTheGod]

Are there any instruction available for building the kernel module? I'm having issues on groovyarcade( based on arch linux).

[pitprowler]

Are there any instruction available for building the kernel module? I'm having issues on groovyarcade( based on arch linux).

I got this working in Ubuntu yesterday after a lot of trouble. The problem was with the Makefile. For any Linux kernel higher than 5.3, the SUBDIRS keyword is deprecated and you need to change it to M. Then make and make install should work.

I am planning to try to get it to act as a mouse for use by emulators by following this tutorial: https://askubuntu.com/questions/114895/how-can-a-gamepad-control-the-mouse

[sonik-br]

@pitprowler have you managed to make it work as a mouse?
I compiled it and it does get mapped at /dev/input/event*
But linux detects it as a joystick
"(II) event5 - EMS LCD TopGun 0b9a:016a: is tagged by udev as: Joystick"

[pitprowler]

I did get it to work as a mouse using the antimicro program mentioned at the bottom of the thread I linked above. I would like to just edit the driver itself if I had the time.

[sonik-br]

Thanks. I tried to edit and map it to a mouse with no luck.

[pitprowler]

I remembered something I read a while ago and managed to get the gun recognized as a mouse without much effort.
Go to the section in lcdtopgun.c where it defines which buttons the gun will report. Then just add BTN_LEFT to the list (See below). Linux sees that a left mouse button click is reported and adds it as a mouse device as well.as a joystick.

static const signed short topgun_btn[] = {
BTN_TRIGGER, BTN_A, BTN_B, BTN_C, /* Main buttons /
BTN_START, BTN_SELECT, / Start, Select /
BTN_LEFT,
-1 / Terminating entry */
};

[sonik-br]

That's really interesting!
I will try it out. Thanks!