8f4264f4d2
Adopt proper embedded tooling for the blank-screen debug (user has a Pi Debug Probe):
- flip-link linker (baked into pm-rust:2): stack overflow faults cleanly instead of
silently corrupting .bss/.data (the SPI buffer -> black screen class of bug).
- defmt + defmt-rtt + panic-probe: firmware logs boot/heap-free/display/parse/loop
heartbeat over RTT; panics print message+location. .cargo runner = probe-rs run.
- Restore the full live metronome (from 08b0940) as the instrumented target.
- deploy + serve pm-kit.elf (probe-rs decodes defmt strings from the ELF).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
17 lines
609 B
TOML
17 lines
609 B
TOML
[build]
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target = "thumbv8m.main-none-eabihf"
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[target.thumbv8m.main-none-eabihf]
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# flip-link: places the stack BELOW the statics so a stack overflow hits a guard region
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# and faults cleanly instead of silently corrupting .bss/.data (e.g. the SPI buffer → black screen).
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linker = "flip-link"
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# `cargo run` flashes over the Raspberry Pi Debug Probe and streams defmt logs/panics via RTT.
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runner = "probe-rs run --chip RP235x"
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rustflags = [
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"-C", "link-arg=--nmagic",
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"-C", "link-arg=-Tlink.x",
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"-C", "link-arg=-Tdefmt.x", # defmt's linker section for log-string interning
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]
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[env]
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DEFMT_LOG = "debug"
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