Game Input MultipleXer

Hi there,

My setup:

PS4, Logitech DFGT, Driveclub
GIMX 5.3
Windows 7 64bit
DIY adapter made from the guide for dummies (Teensy 2.0, CP2102 serial converter)
EMUG29PS4 firmware (atmega32u4.hex), LogitechDrivingForceGT_G29.xml config


The controls and force feedback works very well, but after what seems like a random amount of time I get an error, after which controls are not working. It has happened after just 1 short race or it has happened after more than 45 minutes of play, so I don't see a pattern.

The error: "queue_write: no space left in write queue for device (0)".
Full gimx.exe log at time of error: http://i.imgur.com/OMLtDXh.jpg

What does this mean, or rather why is it happening?

Also 2 times so far, again randomly, the gimx.exe window has simply closed by itself. I don't know how to provide a log in this case, but do you know why this happens?

I don't know if it's related to my 2 error cases, but in GIMX launcher if I press the Check button, my setup says "joystick not found: PS4 controller (0)", but it starts fine anyway when I press the Start button and then press PS button on the DS4.

Hopefully you can help me, your support for Logitech wheels on PS4 is very much appreciated

Hi,

The commands that are sent to the adapter are queued, and the queue size is 2.
The "queue_write" error means that there are already 2 commands in the write queue.
I suspect a USB connection issue with the CP2102 adapter.
This could due to a faulty USB cable, or a weak USB HUB.

Your other problem (gimx.exe closing unexpectedly) may have the same cause.

To generate a log file, just select "Messages>Log file" in gimx-launcher before starting GIMX.

Thanks for your input.

Initially I had problems getting it to work at all, so I tried some different things with the USB drivers and other things. It turned out that I just needed to switch the Rx and Tx pin connections on the serial converter (mis-labeled?). But I might have done something wrong during the phase where I tried different things.

So I've deleted everything including the controller profiles and re-installed it all. Now the Check button says my setup is correct and I have just played a session that lasted over 2 hours without running into the queue error, so it seems to be working as it should now. I can finally play with my wheel again

So I spoke too soon with my previous post. It seems to have been a lucky first session after my re-installation of everything.

The gimx.exe program still randomly closes and since my previous post I haven't been able to play anywhere near 2 hours, like I was able to in that session without seeing an error. It happens from anywhere within the first minutes of playing to maybe after 20 minutes of play.

A shortened log file example of my error: http://pastebin.com/raw.php?i=79MMdRU0

You said it most likely is because of a bad USB connection, either cables or hub. I don't use a hub, I use the 3 USB ports in my laptop.

I find it strange that I can play for such varying play times before the error happens. I would think if I had a bad USB connection that I couldn't play at all, but apparently not.

For cables I use a PS3 mini USB charging cable, a cheap male to female USB cable and the DFGT USB cable. Are the 2 first cables good enough, or can they be responsible for my error?

I have noticed that when the error happens I hear the Windows sound effect for connecting/disconnecting a USB peripheral, so that suggests that it is a bad USB connection, right?

I also hear this sound effect after I press the Start button in GIMX. Is that the correct behaviour?

Would it be possible to include some log messages in a test version to help me identify which connection is failing?

I recommend you to try without the retractable USB cable.
I know the tutorial shows such cables, but shielded USB cables should be used instead.

Thanks for the recommendation, Matlo.

I have now ordered a shielded male to female USB cable.

Did you try connecting the CP2102 directly?

I'm dumb, I thought an extension cable was necessary

I've tried it for some time now and no error, so that is promising.

Hmm, this is frustrating. I'm still getting the error randomly even with plugging it directly into the USB port.
Can it be my CP2102 board itself? I have this one: NEW CP2102 USB 2.0 to UART TTL 6PIN Module Serial Converter Free Cables

I'm thinking of trying a different one, they are dirt cheap anyway.

A board with only 5 pins, but the 3 needed ones (Rx, Tx, Gnd), can that be used?

What is the CP2102 driver version?