U-Boot - Bootloader for IoT Platform?
summary
Demonstrates a concrete path to run U-Boot on a very small IoT board by trimming features, changing build flags and adjusting defaults so the final image falls below typical 256 kB constraints; resulting binary shrinks from ~422 kB to under 200 kB. Uses kconfig, size/nm and a symbol-diff tool, enables --gc-sections and per-function/data sections, changes FAT cluster default from 64KB to 4KB, and reduces a USB buffer (64KB→16KB); boot-from-ROM with relocation disabled works.
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chapters (8)
- 0:00U-Boot for IoT platforms
- 3:31Target platform basics
- 10:01Shrinking U-Boot footprint
- 16:48Relocating U-Boot to RAM
- 27:23First execution USB issues
- 31:17Stack overflow FAT errors
- 33:05Final system conclusions
- 35:14Q&A
