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Description
CircuitPython version
Adafruit CircuitPython 7.0.0-beta.0 on 2021-08-24; Fomu with VexRiscvCode/REPL
every codeBehavior
Flashing every firmware after 7.0.0-beta.0 (from 7.0.0-rc.0) using dfu-util will cause circuitpython failed to work properly. A drive named CIRCUITPY won't appeared. Though there is a serial port appeared in the Device Manager, every attempt to connect to the board (for example, using Thonny) through this port will end up in an error.
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