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ENG-CANSAT-FEATHER-M0-SPI (voir la source)
Version du 23 septembre 2018 à 19:41
, 23 septembre 2018 à 19:41→Access to the SPI Flash
* After a while, you should see a '''CIRCUITPY''' drive containing the file '''boot_out.txt'''. Great, the Circuit Python filesystem is initialized on the SPI Flash.
* After a while, you should see a '''CIRCUITPY''' drive containing the file '''boot_out.txt'''. Great, the Circuit Python filesystem is initialized on the SPI Flash.
* Open the Arduino IDE and upload the '''fatfs_circuitpython''' sketch available in the Adafruit's SPI FLASH library. Open the serial console and start the sketch. Voila! the CircuitPython file system is properly mounted and the file '''data.txt''' created and initialized.
* Open the Arduino IDE and upload the '''fatfs_circuitpython''' sketch available in the Adafruit's SPI FLASH library. Open the serial console and start the sketch. Voila! the CircuitPython file system is properly mounted and the file '''data.txt''' created and initialized.
{{ambox|text=So, the Arduino Sketch did manipulated a file onto the SPI Flash owning the CircuitPython filesystem!}}
{{ADFImage|FEATHER-M0-ArduinoIDE-SPI-Flash-02.png}}
{{ADFImage|FEATHER-M0-ArduinoIDE-SPI-Flash-02.png}}
* Revenons sur notre ordinateur, redémarrez le bootloader de la carte Express --ET-- re-glissez/re-déposez '''circuitpython.uf2''' sur le lecteur '''BOOT''' rendu accessible par le bootloader. Voilà, CircuitPython est résintallé sur la carte Express.
This time, we will open the file created by the Arduino sketch.
* Au bout d'un moment, le lecteur '''CIRCUITPY''' redevient accessible. Celui-ci expose a nouveau le système de fichier MicroPython de la Flash SPI. Vous pouvez maintenant voir le fichier '''data.txt''', l'ouvrir et en consulté le contenu!
* Let plug again the board on the computer, restart the bootloader on the Express board --AND-- drag/drop the '''circuitpython.uf2''' on the drive '''BOOT''' made accessible by the bootloader. Great, CircuitPython is now installed (again) on the board.
* After a a while, the '''CIRCUITPY''' drive is made available by CircuitPyhton. This would expose the SPI Flash content as a Mass Storage device. You can now see the file '''data.txt''' created by our Arduino Sketch, Open it and read it's content :-) !
{{ADFImage|FEATHER-M0-ArduinoIDE-SPI-Flash-03.png}}
{{ADFImage|FEATHER-M0-ArduinoIDE-SPI-Flash-03.png}}