Summary

Mike Silva's 'Introduction to Microcontrollers - Hello World' walks readers through the classic first embedded program: blinking an LED. The article shows how to verify the toolchain, write minimal bare-metal firmware to toggle a GPIO, and flash/debug the program on common ARM Cortex-M boards.

Key Takeaways

• Set up the ARM GCC toolchain and a simple build (Makefile) to produce a flashable binary.
• Write minimal startup and main code to configure a GPIO and toggle an LED on an ARM Cortex-M microcontroller.
• Flash and debug firmware using common tools (e.g., OpenOCD, ST‑Link) and verify runtime behavior.
• Diagnose basic hardware issues such as wiring, LED polarity, and required pull-ups/pull-downs.

Who Should Read This

Beginner embedded developers, students, or hardware hobbyists who want practical, hands-on guidance for bare-metal firmware bring-up and the classic LED blink on ARM Cortex-M boards.

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