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Thonny_and_Raspberry_Pi_Pico.md

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Thonny and Raspberry Pi Pico

1. Getting started

Install Thonny

  • Download the Mac install pkg from https://thonny.org/
    • I picked thonny-xxl-3.3.11.pkg, with -xxl- in the file name which adds some useful extra Python packages
  • Run the pkg file to install Thonny

Setup Thonny for Pico

  • Plug the Pico into the Mac
  • Start Thonny
  • On the menu bar click Tools -> Options..., then in the Interpreter tab;
    • Select MicroPython (Raspeberry Pi Pico)
    • (Leave the Port in auto-detect mode)
    • On a new Pico, it will pop up a firware update dialog. If it doesn't, click the Install or update firmware link and follow the instructions. NB: Only keep pressing the BOOTSEL button for a few seconds after plugging in

2. Run Python live in a shell

  • Plug in the Pico and start Thonny

  • Click the red Stop/Restart backend up the top

    • You should see MicorPython v... stuff pop up in the shell, and a >>> shell prompt at the bottom

  • The shell should now be up and running.

  • Try running something like this;

    >>> from machine import Pin
>>> led = Pin(25, Pin.OUT) # <- This is the led on the Pico's board
>>> led.toggle()
>>> led.toggle()
>>> led.value(1)
>>> led.value(0)

3. Auto-run a Python file on reboot using main.py

  • Plug in the Pico and start Thonny

  • Click the red Stop/Restart backend up the top

    • You should see MicorPython v... stuff pop up in the shell, and a >>> sheel prompt at the bottom

  • On the menu bar click File -> New

  • Type (or cut-n-paste) in a program like this led-flash program;

    from machine import Pin
import utime
led = Pin(25, Pin.OUT)  # <- This is the led on the Pico's board
led.low()

while True:
  led.toggle()
  utime.sleep(0.2)

  • On the menu bar click File -> Save as...

  • In the Where to save to? dialog, click Raspberry Pi Pico

  • Save with the filename main.py

  • On the menu bar click Run -> Disconnect

    • NB: I think this is needed as an eject type-o-thing so it's falsh drive isn't damaged

  • Unplug then plug the Pico back in