& tests of the debug_flags. Currently the compiler is able to eliminate
the block and the & operation when the constant is zero, but since
the debug_flags variable is a volatile the compiler does not eliminate
the load of the variable. By pretesting and shortcutting the load is
eliminated. Saves a small number of bytes when the debug build is
disabled and costs nothing when it is enabled.
Two thermistor tables included:
ThermistorTable.h.dist.old, which is the table we used to have, included so those already using it don't have to recalibrate.
ThermistorTable.h.dist, which was generated with 50 entries, and trimmed down in lower temperature ranges where we don't care as much about accuracy and there's less deviation from a straight line anyway.
Corrected default temp sensor entry in config.h.dist to thermistor instead of intercom. (Now matches earlier definitions which by default say we're using a thermistor)
Added noheater sensor example to config.h.dist
Copied CreateTemperatureLook.py from "official" firmware, and modified it for 14.2 fixed point, no negative temperatures (we're using uint16_t's), and PROGMEM.
Since I simply copied the example linear interpolation formula from wikipedia, I'm certian that it could be more efficient. The code that was there wouldn't work with 14.2 table values, and my understanding of it was too shallow to fix it. This works, and upgading the calculations to uint32_t actually takes less code space than leaving them at uint16_t. I assume it's calling a library routine that's already being linked in for the 32-bit math.
Jim McGee
Sergey Batalov
Kieran Levin
Markus Amsler
Michael Moon
Stephan Walter
John Gilmore (none)
Vik Olliver
plasmator
Casainho