NG USB 'class compliant?'

[tffshtt]

Next noob topic:

I'm having trouble addressing two stm32f4 boards (running goom synthesizer) simultaneously over an iconnectivity MIDI4+...is the NG/MIOS32 all the way USB 'class compliant?' 

[TK.]

Yes, it's class compliant.

But some MIDI hosts have problems if two interfaces with the same name are connected.

You could give one board a different name via the bootloader update app.

See http://www.ucapps.de/mios32_bootstrap_newbies.html

search for "name"

 

Best Regards, Thorsten.

[FantomXR]

And also some hosts have problems with the multiple usb-port function. Try to set single_usb to 1 in the bootloader.

[FantomXR]

Okay, that's wired... I have the same problem!

 

I just bought an iTrack Dock of Focusrite which has an USB-jack on the backside. This is for connecting USB-MIDI-Devices directly. I tested it with a iCon iKeyboard which works well. But when connecting a MIDIbox, it's not recognized by the iTrack Dock at all. I disabled multiple USB-support and also tried different names... the MIDIbox get's powered externally so it's not a problem related to the power supply of the iTrack. It doesn't work either if I try to power the MIDIbox from the iTrack directly. It boots up but doesn't get recognized.

 

Any suggestions?

Edited July 6, 2015 by FantomXR

[TK.]

The USB descriptors of MIOS32 match with the descriptors of the official usbmidi interface spec, no special tricks have been used, and Windows/Linux/MacOS are happy with them.

So, if another Host doesn't connect, it's an imperfection in the Host driver and you've to report this to the appr. manufacturer, not me!

In any case it always makes sense to check, if the manufacturer already fixed the bug in a newer driver version based on customer feedback...

Best Regards, Thorsten.

[FantomXR]

Thanks for the reply!

 

After reading more about this I just realized that many people have the same problem. So it seems it's related to the iTrack...sadly :( I'd need to use a USB to MIDI Adapter but with that I'm not able to power the MIDIbox directly... 

[FantomXR]

I checked again:

 

I have a LPC1769 core which I tested with the iTrack. Result: It's working perfectly while the STM32F3 doesn't.....

So the STM32F4 seems to be different from that and the issue is not (only) related to MIOS32 & the iTrack. 

 

Anyway: The LPC is working and that are great news :-)

[tffshtt]

@Thorsten

Thanks for the suggestion...the naming thingy seems to be most consistent with the issues I'm running into...I'll try that first!