Start a specific emulator by command line

[marvink]

Hello everyone!

I want to start a specific emulator (for example “snes”) from the command line so that I only have to choose the game I want to play. Is there a command for this purpose?

Greetz
Marvin

[herbfargus]

https://github.com/retropie/RetroPie-Setup/wiki/FAQ#how-would-i-start-from-command-line-say-the-snes-emulator-by-itself

[labelwhore]

Just to add to Herb’s reply. You can see the commands ES is using when it starts an emulator by looking at the emulators.cfg files in the respective folders here /opt/retropie/configs

[marvink]

Thanks for the answers!

My RetroPie-Project goes ahead and I think I need some base support.
All hardware is available and now the tinkering and programming can start.

So thats the plan:
I have an old rotary phone and want to use it as the case for my raspberry pi 2. Instead of the normal RetroPie Gui I will show my own user interface where all available games are displayed with a “phonenumber”. The user can then dial a number to start a specific game. Probably there will be no more than 10 games.

I think the answers above will help me to start the game, but a few questions are still open:

How can I start my own programm while system start, instead of the RetroPie GUI?
Which programming language should I use? (I have some experience with C#, Java, C and Python)

I’m thankful for every tip.

Greetz
Marvin

[labelwhore]

First you’ll need to stop ES from starting up at boot time. I believe you can do this from the retropie-setup script. From there the easiest way to get something to run at boot time is to add a command to /etc/rc.local.

[marvink]

That is a good starting point. Thanks!

[marvink]

Hallo again!
So, work is still in progress…
I wrote the skript and it works fine until I want to execute the command,
I use:
command = retroarch -L /opt/retropie/libretrocores/lr-pocketsnes/libretro.so /home/pi/RetroPie/roms/snes/nameofmyrom.smc
subprocess.check_call(command, shell=True)

But it returns:
“returned non-zero exit status 2”

I tried some variations but I dont get it :(

Any ideas about that?

[marvink]

Yeah, I got it! :D

Three points:
1.:’subprocess’ does not work. I had to use ‘os.system’
2.: I had to use the full path, when calling the ‘retroarch’ command.
3.: I had to insert a backslash for each space and parentheses in the name of the roms.

The rest should be simple, but we will see…

Again, thanks for the help!

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