Monday, December 3

platform detection with linux on single-board computers

I’m extracting some Python code for detecting the current hardware from Adafruit_Blinka and Adafruit_Python_GPIO. This is a quick and dirty linkdump on ways to figure out what board you’re running on.

Python’s sys.platform:

This string contains a platform identifier that can be used to append platform-specific components to sys.path, for instance.

Python’s platform - yields some architecture / OS / processor / Python interpreter data.

If it exists, /proc/device-tree/model may give you a human-readable string (no trailing newline):

pi@raspberrypi:~ $ cat /proc/device-tree/model
Raspberry Pi 3 Model B Plus Rev 1.3

/proc/cpuinfo will have various useful things. On the Pi, it’ll include lines like so, which are useful:

Hardware        : BCM2835
Revision        : a020d3
Serial          : 000000007cd89b23

The Pi foundation has a list of the revision codes.

An issue on Ev3dev, “an operating system that runs on the LEGO MINDSTORMS EV3 and other platforms with compatible motor/sensor hardware.”: Relying on /proc/cpuinfo and /proc/device-tree/model is not good enough.

tags: topics/adafruit, topics/hardware, topics/linux, topics/technical

p1k3 / 2018 / 12 / 3