Type consistency fixes and Cortex-M0+ assembly optimizations#40

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FredM67 wants to merge 44 commits intoopenenergymonitor:mainfrom

FredM67:feature/type-consistency-fixes

Commits on Jan 8, 2026

Commits on Jan 9, 2026

Fix I2C bus state initialization using bitwise operation for clarity
FredM67
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Commits on Jan 13, 2026

Commits on Jan 14, 2026

Commits on Jan 15, 2026

Add missing const qualifiers to match header declarations

FredM67
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claude
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Add const to input-only pointer parameter in calibrationPhase

FredM67
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claude
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Use size_t for array index loop counters

FredM67
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claude
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Merge remote-tracking branch 'upstream/main' into feature/type-consistency-fixes
FredM67
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Use optimized assembly square functions for RMS calculations

FredM67
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claude
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Add smul64 signed 32x32->64 bit multiply assembly function

FredM67
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claude
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Use smul64 for power calculations in ecmInjectSample

FredM67
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claude
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Use usqr64 for numSamplesSqr in ecmProcessSet

FredM67
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claude
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Place asm math functions in RAM for faster execution

FredM67
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claude
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Fix channel number output format: use %u instead of %x

FredM67
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claude
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Update SERIAL_COMMANDS.md documentation

FredM67
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claude
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Commits on Jan 17, 2026

Fix type inconsistency in calibrationPhase function
FredM67
committed