XCore Exchange

XMOS Support suggested that I should ask the following question for the XCore Engineers here, on the forum.

In my current project I need to implement USB host with the UAC1 and
UAC2 generic drivers on the xCore 216 (working on audio_xk_216_mc
board).
In the USB Audio MFI Software I found the module "module_usbhost" with
the libUsbHostLLD_x200.a library inside.
I don't actually need the MFI functionality, I just need the "USB 2.0
High Speed" Host library.

I am not sure that libUsbHostLLD_x200.a supports "USB 2.0 High Speed",
because the UAC2 devices I connect to the board's USB port would use
only the "Full Speed".
I suspect that "High Speed" support is either disabled or not
implemented in the libUsbHostLLD_x200.a library.
Analysing the USB communication with an oscilloscope I found that the
XMOS USB host is ignoring "Device K Chirp" and the communication
resumes at the "Full Speed".
Please instruct me how to activate the "High Speed" support for the
libUsbHostLLD_x200.a library.
If that's not possible, can you make the source of that, or other
relevant library, available for me to try to implement the "High
Speed"? I have no problem programming in the XCore assembler.

Best regards
Zoran

Review this page:

https://www.xmos.com/developer/publishe ... 9.a&page=3

and see the parameter named desiredSpeed

These comments are for creating a high speed USB device with the XMOS CPU. You should also be able to apply one of the USB HS device function IPs for quick testing with a HS capable PC port.

Hello mon2,

thank you for quick reply.
The thing is, I need the host XMOS library with HS support, not the device library.
"module_usbhost" with the library libUsbHostLLD_x200.a is the host library, but it supports, apparently, only FS.
That module is a part of the "USB-Audio-Host-Software---MFi_2.0.3.zip" project.

Still no response from anybody

Unfortunately, it seems like you will have to implement this feature yourself from scratch.

Software for high-speed host is something XMOS has not authored, whilst the device is technically capable of it there has not been enough interest in it to spend time vs other application areas. Out of interest, what is your actual application? Why do you need HS host?

Found this thread exploring whether XMOS HS Host support exists. We are performing some design viability studies and need this functionality for a standalone digital/analog hybrid mixer.
There are more devices reaching the market supporting streaming multichannel USB audio, and there is a notable absence of hardware that can directly receive these streams outside of computers.

XCore seems to be the nearest potential solution, would love to hear whether this code is being developed or likely to be.