As a companion to Bobbin CLI, I’ve put together a repository that has bare-bones Blinky code for most of the devices that I have available - 22 in all at this time.
For now, these are all boards based on ARM Cortex-M MCUs, but I expect to include boards based on other chips over time. There are currently examples using various STM32 MCUs, Kinetis KL26Z and K64F, TI TM4C129, NXP S32K, EFM32, SAMD21, nRF51, and even Ambiq Apollo.
Arduino Zero, Adafruit Feather M0 and Teensy are also included, as well as the cheap $2.00 Blue Pill STM32 boards.
This is not a repository that you will want to use for doing real development, unless if you want to teach yourself how these chips work at the datasheet level. It’s real purpose is to provide end-to-end validation of a toolchain install, including the firmware on the development board.
Sometimes you simply want a program that makes your board blink so that you know that everything is working.