AM5748: USB Bulk transfer

Arun Krishnan

Part Number: AM5748

Hi,

I am trying to test USB bulk transfer between AM57X and Linux host where AM57x is to be configured as a USB gadget via configfs.

I have refereed this link https://www.ti.com/lit/an/spracb5/spracb5.pdf for creating a USB gadget.

I have followed the steps and created a USB gadget with acm.usb0 function.

When I connect the AM57F to linux host via USB cable, I can see mu usb device via lsusb command in linux host.

Now, How I can set the in and out endpoints to receive and send data via USB?

For bulk transfer, which configuration to be used?

Thanks in Advance.

Regards,

Arun

over 1 year ago

0 Josue Zamitiz-Ayala over 1 year ago

TI__Mastermind 36116 points

Hello Arun,

This application falls out of our standard SW offering, therefore we do not have any ready-to go advice. Please see open source documentation for guidance.

https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt

https://www.kernel.org/doc/Documentation/filesystems/configfs/configfs.txt

You can then create your own application.

See also other sources online like:

https://blog.soutade.fr/post/2016/07/create-your-own-usb-gadget-with-gadgetfs.html

Best,

Josue

PS. See https://software-dl.ti.com/processor-sdk-linux/esd/AM57X/08_02_01_00/exports/docs/linux/Overview_Technical_Support.html#open-source-software-support-disclaimer

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Thank you for the reply.

I have gone through the links that you have shared; but none of them provides the info on the function to be used for the usb bulk transfer and steps for configuring the end point attributes.

Also, I have tried the gadgetfs for creating a usb gadget; Here, I am facing USBDEVFS_BULK error (Protocol error ) when I try to send a byte stream to the USB gadget from a Linux host machine.

Regards,

Arun

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 36116 points

Hello, Arun,

Please search for existing examples online.

Do you have any issues with your device functionality?
Otherwise, the configuration and functionality of this feature falls under a custom application, to which the responsibility is assumed by the customer. This is outside the scope of our support.

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Thank you for the reply

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AM5748: USB Bulk transfer