2. Double-click the reset button on the board to bring up the
boardname
BOOT drive.
3. Drag the erase .uf2 file to the
boardname
BOOT drive.
4. The onboard NeoPixel will turn yellow or blue, indicating the erase has started.
5. After approximately 15 seconds, the mainboard NeoPixel will light up green. On the NeoTrellis M4 this is the
first NeoPixel on the grid
6. Double-click the reset button on the board to bring up the
boardname
BOOT drive.
7. Drag the appropriate latest release of CircuitPython (https://adafru.it/Amd) .uf2 file to
the
boardname
BOOT drive.
It should reboot automatically and you should see CIRCUITPY in your file explorer again.
If the LED flashes red during step 5, it means the erase has failed. Repeat the steps starting with 2.
If you haven't already downloaded the latest release of CircuitPython for your board, check out the installation
page (https://adafru.it/Amd). You'll also need to install your libraries and code!
Old Way: For Non-Express Boards with a UF2 bootloader (Gemma M0, Trinket M0):
If you are running a version of CircuitPython before 2.3.0, and you don't want to upgrade, or you can't get to the REPL,
you can do this.
1. Download the erase file:
https://adafru.it/AdL
https://adafru.it/AdL
2. Double-click the reset button on the board to bring up the
boardname
BOOT drive.
3. Drag the erase .uf2 file to the
boardname
BOOT drive.
4. The boot LED will start flashing again, and the
boardname
BOOT drive will reappear.
5. Drag the appropriate latest release CircuitPython (https://adafru.it/Amd) .uf2 file to the
boardname
BOOT drive.
It should reboot automatically and you should see CIRCUITPY in your file explorer again.
If you haven't already downloaded the latest release of CircuitPython for your board, check out the installation
page (https://adafru.it/Amd) You'll also need to install your libraries and code!
Old Way: For non-Express Boards without a UF2 bootloader (Feather M0 Basic Proto,
Feather Adalogger, Arduino Zero):
If you are running a version of CircuitPython before 2.3.0, and you don't want to upgrade, or you can't get to the REPL,
you can do this.
Just follow these directions to reload CircuitPython using bossac (https://adafru.it/Bed), which will erase and re-create
CIRCUITPY .
Running Out of File Space on Non-Express Boards
The file system on the board is very tiny. (Smaller than an ancient floppy disk.) So, its likely you'll run out of space but
don't panic! There are a couple ways to free up space.
The board ships with the Windows 7 serial driver too! Feel free to delete that if you don't need it or have already
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