From zero to main(): How to write a bootloader from scratch
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Submission timeline
2007–2026One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderA good real-world example is the Arduino bootloader. [1] Once you read the OP and learn basic idea, it is pretty simple. [1] https://github.com/arduino/ArduinoCore-samd/blob/master/boot...
For Cortex-M embedded topics, memfault's blog is simply one of the best out there. Consistently great posts even though they are written by a bunch of different authors. I go back to https://interrupt.memfault.com/blog/cortex-m-fault-debug all the time when debugging hard faults on different systems. Even if you regularly write embedded code for Cortex-M MCUs, scroll through their list of posts and you'll find several that will teach you something new and useful.
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 2
- Total points
- 526
- Total comments
- 63
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2019-08-14 | How to Write a Bootloader from Scratch | fra | 5 | 0 |
| 2020-09-30 | From zero to main(): How to write a bootloader from scratchFirst breakout · Best thread | tigerlily | 332 | 44 |
| 2022-10-27 | How to write a bootloader from scratch (2019)Latest 20+ point return | arkj | 189 | 19 |