Interstate 75 - Circuitpython Issues

Support
1

Good afternoon,

I am looking for some support with CircuitPython on the Interstate 75 board.
Am having real issues getting the board to boot and run every time it is reset/power cycled.

CircuitPython works fine the first time code is loaded onto it AFTER having had MicroPython running on it, matrix lights up and works as intended. I will then reset/power cycle the i75 and the display fails to light. I am unable to get the display to illuminate either automatically on boot, or via Thonny.
To get the matrix working again with circuitP, I have to flash microP, then circuitP.

Steps to reproduce:

  1. Flash CircuitPython 7.1.1 uf2
  2. Load code.
  3. Runs okay, matrix lights.
  4. Power cycle
  5. Fails to light, no errors in Thonny console.

Kind Regards,
Tom

2

What are you saving your file as, and where are you saving it?

There is a uf2 file here for resetting the flash memory on a “stock” Pico.
Raspberry Pi Documentation - Raspberry Pi Pico

3

code.py, in the root directory.

The code runs, just the matrix doesn’t light up.
No such issue with micropython, just circuitpython seems to cause issue.

4

Ok, just wanted to make sure you weren’t saving it as main.py etc. I don’t have an interstate 75, just so you know. I have a couple of LCD breakouts wired up, and a display pack on a stock Pico. I was hoping this would be a simple user error, I’ve made my fair share of those, let me tell you.

EDIT: I haven’t done much of anything in Circuit Python, Micro Python is what I’ve been using. And Pimoroni’s uf2 for the most part.

5

Thanks for helping sense check, it is surprising how often we all miss things like that.

I believe what I am experiencing is some sort of issue with circuitpython not booting correctly anytime after the first time it’s loaded to the device.

6

Your code or example files? Or both?

7

Are you sure your code.py is being saved to the Interstate 75? I ask because I can run my main.py from Thonny (not saved to the pico) , shut down Thonny and it will keep running on the Pico. That Pico runs from a Lipo Shim, I can even unplug the USB cable and my code keeps running. If I press the reset button its gone.

8

The code is defo on the device and persists the restart, I even believe the code is actually running fine, just the matrix won’t light.

The only way I can get the matrix to run on the device after a power cycle is by reflashing the bootloader. And even that is after flashing the micropython uf2, then booting the circuitpython uf2 again.

9

Ok, that’s all I have at the moment. Really strange one, this is?

10

Bumping to see if anyone else has had a similar issue?