"OSError: [Errno 16] Device or resource busy" for SPI device

[angus]

Hi Michelle,

The first issue you linked to is mine. Blinka does not work with SPI on this board at all, and nobody is really working on it as far as I can tell. Blinka is a bit of a mess, since SBC’s vary widely, and they’re definitely a RPi first type project.

To get the MCP3008 working we had to write a Device Tree Overlay. It was a bit of a learning curve. Here is the thread:

Problems accessing MCP3008 via SPI - Invalid argument

I want to convert/transfer a program, which reads humidity sensors via a MCP3008 ADC, from Raspberry PI 4 to Le Potato. The program looks like this: import time import tkinter from time import gmtime, strftime import pin_mapping import libregpio as GPIO from libregpio import OUT, IN from tkinter import * import pathlib from pathlib import Path import busio import smbus import serial import adafruit_blinka #from analogio import analogin import digitalio import board # create the spi bus spi = …

Here’s the driver, you may need to reference it:

torvalds/linux/blob/master/drivers/video/fbdev/ssd1307fb.c

I hope that helps get you started.