gossamer

Gossamer is an extremely lightweight framework for developing bare-metal firmware applications for the Microchip SAM D and SAM L series chips. Before you get started, you might want to take a look at the README.

After that, you can get a sense for how to implement an app with the Gossamer application framework.

You'll also want to know some stuff about the System Internals.

From there, check out all the peripherals available on most chips:

• Analog to Digital Converter
• Digital to Analog Converter
• External Interrupt Controller
• Inter-IC Communications Peripheral
• Real-Time Clock
• SPI Peripheral
• UART Peripheral
• Universal Serial Bus

There are also special peripherals that are only available on certain chips:

• The Segment LCD driver on the SAM L22
• The Operational Amplifier on the SAM L21