stm32f4 usb high speed cdc RX Bug?

hi, i'm using stm32f4 mcu for lots of periph.

the usb communication (2.0 high speed) of my project has a problem

there is no problem between my desktop pc and mcu board

but, my mcu board usb does not operate properly in my laptop or others desktop pc

when i was debugging this, i found that usb character (1byte only) was received at the CDC_Received_HS(---) function

this function argument is received string length and Rx buffer pointer

i don't understand why this happens.

i also has installed virtual comport driver on my pc and desktop pc (OS is window 10 pro)

anyone help

thanks.

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Visitor II

Hello @Fish ,

You can refer to the following example provided under our F4 Firmware Package:

BeST Regards,

Walid

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