USB string descriptor modification

[TTsao.1]

Hi All,

I practice an HID USB project at windows 10 with NUCLEO-F303ZE. And I initiated a project by STM32CUBEIDE and STM32CUBE. I alsp can get enumeration of connecting procedure so far so good. My project has a request which needs to response string descriptor 0xEE. Because I found if the host sends 80 60 EE 03 00 00 12 00, the device will get stall. like the below picture:

My question is how to modify the procedure to let the device can determine the string descriptor then send back the data which I need?

TT.

[Pavel A.]

You project likely contains a source file which deals with descriptor requests. Read it, understand, then add the needed descriptor.

[TDK]

String descriptors are found within usbd_desc.c.

[waclawek.jan]

It's okay to stall unsupported desriptor requests, including the Microsoft extensions (as Pavel A. pointed out above).

JW

[TTsao.1]

Hi All,

Thank you for your help. I have solved the problem.

[Rxue.1]

您好，我最近在使用STM32G0B1�?�USB的开�?�。

�?�样的，在数�?�传输时，usb device有时也会�?�生�?�顿。请问您�?��?�是如何解决的？

[Javier1]

@TTsao.1​ what programm or harware are you using to sniff USB? im very interested