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ehntoo.bsky.social
I do things with embedded computers. He/Him
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Cursed knowledge learned today: thumbv8 targets (like the RP2350!) start with their memory marked as "non-sharable" at boot, meaning that atomics between the processors *don't actually work*, until you either set the regions sharable in the MPU, or set a global "everythings sharable" flag.

submitted 141 days ago • 2 comments

Rules for Interrupt Safety: 1. Always Keep Interrupts Vectored in a Safe direction 2. Treat All Interrupts as Though They are Enabled 3. Keep Your Event Sources Disabled Until You are Ready to Handle Them 4. Always Be Sure of Your Vector Target and What’s Beyond It

submitted 179 days ago • 7 comments

Happy 21st birthday to Trogdor!! (This is sadly not a joke. That sbemail debuted 1/13/03. We are old).

submitted 530 days ago • 58 comments

Ok how much does this handle break

submitted 772 days ago • 6 comments