prosolis
3904703de1
Greenfield bare-metal firmware for a Pi Zero that lights a WS2812B strip above an 88-key keybed. The Pi is a USB MIDI gadget; the PC is the host and owns the piano connection and everything else. No network stack, no filesystem, no shell. Circle is a submodule pinned to Step51. Builds kernel.img (RASPPI=1, Zero / Zero W) and kernel7.img (RASPPI=2, Zero 2 / Zero 2 W); both coexist on one card, so either model runs from the same SD. Resolves two open assumptions from the plan against the Circle sources rather than by guessing: - CWS28XXStripe clocks the waveform out over SPI at a fixed 6.4MHz, one SPI byte per LED bit. On device 0 that puts data on MOSI = GPIO10 = physical pin 19. The implied 5.28ms frame time matches the plan's arithmetic. - The USB gadget lifecycle follows sample/29-miniorgan, which already carries a USB_GADGET_MODE path. Three details the hardware forces: - The gadget destroys and recreates its CUSBMIDIDevice across a USB suspend, so the kernel re-fetches it and clears notes held at that moment. Otherwise a chord would stay lit forever when the PC sleeps. - Rendering blocks for ~5.3ms of SPI traffic, so the MIDI packet handler only records state and the main loop draws. - MAX_LIT_KEYS complements the global brightness ceiling. 176 LEDs at full white would draw ~10.5A against a 6A supply; together the two clamps make that unreachable rather than merely unlikely. Every Phase 0 product decision has a named slot in firmware/config.h, all overridable at build time via EXTRADEFINE. tests/run.sh compiles the real pianoleds.cpp against stubbed Circle headers and checks the mapping, note-off paths, range clamping and both power clamps across nine configuration variants. It verifies arithmetic, not wiring, and does not replace bench-testing on real hardware. Claude-Session: https://claude.ai/code/session_01TVCB25LBsmeteWvaSMz4Ne
34 lines
1.0 KiB
Bash
Executable File
34 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
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# Host-side tests for the mapping and power-clamp logic.
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# Compiles the real firmware sources against stubbed Circle headers, across
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# every configuration variant that changes the rendering path.
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set -e
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cd "$(dirname "$0")/.."
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OUT=$(mktemp -d)
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trap 'rm -rf "$OUT"' EXIT
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FAIL=0
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for CFG in \
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"default:" \
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"reversed strip:-DSTRIP_REVERSED=1" \
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"velocity insensitive:-DVELOCITY_SENSITIVE=0" \
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"reversed + velocity insensitive:-DSTRIP_REVERSED=1 -DVELOCITY_SENSITIVE=0" \
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"full brightness:-DGLOBAL_BRIGHTNESS=255" \
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"tight key cap:-DMAX_LIT_KEYS=5" \
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"single LED per key:-DLEDS_PER_KEY=1" \
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"three LEDs per key:-DLEDS_PER_KEY=3" \
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"hints disabled:-DHINT_MIDI_CHANNEL=MIDI_CHANNEL_NONE" \
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; do
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NAME=${CFG%%:*}
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FLAGS=${CFG#*:}
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printf '\n=== %s ===\n' "$NAME"
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g++ -std=c++17 -Wall -Wextra -Wno-unused-parameter $FLAGS \
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-o "$OUT/t" -Itests/stubs -Ifirmware \
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tests/test_pianoleds.cpp firmware/pianoleds.cpp
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"$OUT/t" || FAIL=1
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done
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printf '\n'
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if [ $FAIL -ne 0 ]; then echo "SOME CONFIGURATIONS FAILED"; exit 1; fi
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echo "all configurations passed"
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