Engineering notes

Notes from the bench.

Short, specific write-ups on the problems that show up between a schematic and a board that boots. Written by the engineers who hit them.

RAM 0x20000000_estack 0x20008000.data .bssmalloc(64)malloc(32)malloc(128)32malloc(96)malloc(48)malloc(24)16stackHEAP GROWS UPSTACK GROWS DOWN> malloc(64) -> 0x20004000> malloc(128) -> 0x200040C0> free(0x20004074)> malloc(24) -> 0x20004074> free(0x20004000)

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FirmwareSeptember 18, 20266 min read

What happens between reset and main()

The first milliseconds of a Cortex-M microcontroller, and the bugs that hide there.

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