5/29/2023 0 Comments Stm usb vcp driver![]() The problematic PCB would not have the same problem when I connect it to my main computer, but the problem persists on the (multiple) target computers. However, after 1-10 minutes, the computer can’t recognize the device again, even if I unplug and re-plug the device – that is, until I try to clean the contacts again.Ģ. ![]() After cleaning the MCU and USB port pins’ contacts with the pads (using flux, rework gun, and flux cleaner), the problem goes away temporarily after re-plugging the USB. Around 20-30% of the PCBs would have the problem you described in the beginning of your article, and there are be 2 odd things that happens:ġ. Next, select the USBHOST and select the class as Communication Host Class, and Leave everything here to default. Also make sure you activate the VBUS, Host is the one responsible to provide the power to the USB device. F072 is advertised to be capable of crystal-less USB 2.0, so I did not put any external oscillators in the design. HOST Setup First of all we need to select the USBOTGFS in Host Only mode. That said, I have made a batch of USB device PCBs, using STM32 F072 as the MCU. Hello, very useful guide! :) I am a pretty novice PCB designer, so forgive me if I lack the troubleshooting skills.
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