BlackMark
ab78d94872
Same controller: thermistor on ADC0 averaged over 1000 free-running conversions, 50 kHz fan PWM on OC0B, 115200 Bd console with the full command set, EEPROM temperature histogram, watchdog-reset path into the boot section. The Steinhart-Hart math and the libm log are gone — the Beta equation and the cubic fan curve are consteval-evaluated into flash tables; the firmware never does floating point. Byte-identical .text in both libavr modes. Legacy stays on master. Co-Authored-By: Claude <noreply@anthropic.com>
805 B
805 B
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.