BlackMark
b7a2e50506
Both headers described the port transformation ("legacy cubic becomes",
"no hand-rolled series needed") rather than what the code is. State the
cubic and the __builtin_log rationale directly.
Co-Authored-By: Claude <noreply@anthropic.com>
fantemp
Temperature-controlled fan firmware (ATmega328P, 16 MHz), rewritten on
libavr: thermistor on ADC0 sampled
free-running and averaged over 1000 conversions, fan on OC0B at 50 kHz,
115200 Bd serial console (help lists the commands), temperature
histogram persisted to EEPROM, watchdog-reset path into a boot-section
bootloader.
The Steinhart–Hart math of the legacy firmware (runtime doubles + libm log) is gone: the Beta equation and the cubic fan curve are evaluated consteval into flash tables — the firmware itself never touches floating point.
Build against a libavr checkout:
LIBAVR_ROOT=/path/to/libavr cmake --preset atmega328p-generated
cmake --build --preset atmega328p-generated
Legacy (yazoalfa submodules) stays on master.