@@ -15,29 +15,39 @@ This often happens on Windows when the ``CIRCUITPY`` disk is not safely ejected
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before being reset by the button or being disconnected from USB. This can also
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happen on Linux and Mac OSX but its less likely.
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- .. caution :: Delete ``CIRCUITPY`` filesystem and reload CircuitPython.
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+ .. caution :: To erase and re-create ``CIRCUITPY`` (for example, to correct a corrupted filesystem),
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+ follow one of the procedures below. It's important to note that **any files stored on the **
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+ ``CIRCUITPY `` **drive will be erased **.
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- To reload CircuitPython (for example, to correct a corrupted filesystem),
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- follow the process below. It's important to note that **any files stored on the
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- ``CIRCUITPY`` drive will be erased **.
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+ **For boards with ** ``CIRCUITPY `` **stored on a separate SPI flash chip,
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+ such as Feather M0 Express, Metro M0 Express and Circuit Playground Express: **
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- #. Download the appropriate flash erase uf2 from `here <https://github.com/adafruit/Adafruit_SPIFlash/tree/master/examples/flash_erase_express >`_.
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+
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+ #. Download the appropriate flash .erase uf2 from `here <https://github.com/adafruit/Adafruit_SPIFlash/tree/master/examples/flash_erase_express >`_.
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#. Double-click the reset button.
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#. Copy the appropriate .uf2 to the xxxBOOT drive.
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#. The on-board NeoPixel will turn blue, indicating the erase has started.
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#. After about 15 seconds, the NexoPixel will start flashing green. If it flashes red, the erase failed.
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#. Double-click again and load the appropriate `CircuitPython .uf2 <https://github.com/adafruit/circuitpython/releases/latest >`_.
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+ **For boards without SPI flash, such as Feather M0 Proto, Gemma M0 and, Trinket M0: **
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+
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+ #. Download the appropriate erase .uf2 from `here <https://github.com/adafruit/Adafruit_Learning_System_Guides/tree/master/uf2_flash_erasers >`_.
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+ #. Double-click the reset button.
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+ #. Copy the appropriate .uf2 to the xxxBOOT drive.
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+ #. The boot LED will start pulsing again, and the xxxBOOT drive will appear again.
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+ #. Load the appropriate `CircuitPython .uf2 <https://github.com/adafruit/circuitpython/releases/latest >`_.
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+
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ValueError: Incompatible ``.mpy `` file.
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---------------------------------------
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This error occurs when importing a module that is stored as a ``mpy `` binary file
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(rather than a ``py `` text file) that was generated by a different version of
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CircuitPython than the one its being loaded into. Most versions are compatible
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but, rarely they aren't. In particular, the ``mpy `` binary format changed between
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- CircuitPython versions 1.x and 2.x.
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+ CircuitPython versions 1.x and 2.x, and will change again between 2.x and 3.x .
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- So, if you just upgraded to CircuitPython 2.x from 1.x you'll need to download a
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+ So, for instance, if you just upgraded to CircuitPython 2.x from 1.x you'll need to download a
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newer version of the library that triggered the error on ``import ``. They are
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all available in the
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`Adafruit bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle/releases/latest >`_
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