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The STM32 USB device library feels complicated

Shiina
Associate III

‎2024-11-18 08:06 AM - edited ‎2024-11-18 11:29 PM

The structure of the stm32 usb device library feels very complex, is there any tutorial to clarify the structure?

I want to implement a UVC.

This is a picture I found on a wiki, but I can't make sense of it.

Shiina_0-1731945993216.png

For example, the file stm32xxx_ll_usb has no LL for the API name, but the USB core has LL for the API name, which is very confusing, and PCD HAL driver The name doesn't tell you what it does.

If the following structure is better applied

Shiina_0-1732001345711.jpeg

 

 

 

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4 REPLIES 4
Imen.D
ST Employee

‎2024-11-18 08:14 AM

Hello @Shiina ,

I recommend you refer to the following document: UM1734: STM32Cube™ USB device library.

When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen
Andrew Neil
Evangelist III

‎2024-11-18 08:16 AM

@Shiina wrote:

The structure of the stm32 usb device library feels very complex,

well, USB itself is quite complex!

 

@Shiina wrote:

This is a picture I found on a wiki

What Wiki? please give a link

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gbm
Lead III

‎2024-11-18 08:27 AM

My impression is that STM USB stack with tangled pointers and bidirectional function calls between logical levels is much more complex than USB. ;)

My STM32 stuff on github - compact USB device stack and more: https://github.com/gbm-ii/gbmUSBdevice
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