Hello ,
I am working with the STM32H755ZI-Q board and configuring it as a USB Host. I’ve successfully tested the USB Host functionality using standard USB devices such as a keyboard and a mouse, both of which are recognized correctly by the host.
However, when I connect a USB-to-TTL adapter to the host, it fails to detect or enumerate the device. There is no response or indication that a USB device has been connected.
I would appreciate any guidance or suggestions on the following:
Are USB-to-TTL adapters supported in USB Host mode by default?
Is there any specific configuration or class driver (e.g., CDC class) that I need to enable for this to work?
Has anyone successfully interfaced a USB-to-TTL device with STM32 USB Host?
This is the output I see on Tera Term after enabling the user log :
USBH Event Triggered
Event : Start
PID: 7523h
VID: 1a86h
Address (#1) assigned.
Manufacturer : N/A
Product : USB Serial
Enumeration done.
This device has only 1 configuration.
Default configuration set.
No registered class for this device.
What steps are required to enable CDC functionality when connecting a USB-to-TTL adapter to the STM32 USB Host?
