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This document provides an overview of training materials for an embedded starter kit focused on bare metal programming of LEDs and buttons. The goals are to create firmware to control LEDs and read button presses, learn about the hardware operation of LEDs and buttons, and learn GPIO input/output and interrupt basics. It introduces GPIO configuration as digital I/O with pull-up/down resistors or analog, covers GPIO pin functionality, and discusses using interrupts to address the delay issues of polling button states in a main loop. The practice section has the learner set up a project to control an LED based on a button press via polling initially, then refactors to use interrupts to eliminate delays.Read less