Does STM32Cube USB Host support CH341/CH340 USB-to-serial chips on STM32F405?

[sakshmika]

We're using an STM32F405 as a USB OTG FS Host  and need to communicate with a USB-to-serial adapter that uses the CH341 chip.

We could not find any official CH341/CH340 driver or class support in STM32Cube packages or example projects.

Questions:

1. Can you confirm whether STM32Cube USB Host middleware officially supports CH341/CH340 devices, in any released package (including X-CUBE expansion packages)?
2. If not supported, is there a recommended reference or guidance from ST for implementing a custom USB Host class driver for vendor-specific USB-to-serial chips like CH341, based on the existing USBH_ClassTypeDef interface used by CDC/MSC/HID?
3. Are there any known limitations on STM32F405 USB OTG FS Host mode we should be aware of when implementing a custom class driver (e.g., control transfer handling, endpoint limits)?

[mfgkw]

Probably not.

 

Do you want to connect the CH34x via USB with your STM32F405 to have serial connection to somewhere? Why not use the MCU’s U(S)ARTx directly without USB?

 

[Andrew Neil]

need (sic?) to communicate with a USB-to-serial adapter that uses the CH341 chip

As ​@mfgkw said, please expand on why you feel the need to do this ?

 

Have you tried it with just a standard CDC ACM Class ?

Have you tried searching to see if anyone has done this with any microcontroller ?

eg,

and, similarly:

 

via: https://www.google.com/search?q=host+CH340+site%3Acommunity.st.com

(other internet search engines are available)