diff options
Diffstat (limited to 'spaghetti-monster/fsm-adc.c')
| -rw-r--r-- | spaghetti-monster/fsm-adc.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/spaghetti-monster/fsm-adc.c b/spaghetti-monster/fsm-adc.c index c382a8a..dd43cb9 100644 --- a/spaghetti-monster/fsm-adc.c +++ b/spaghetti-monster/fsm-adc.c @@ -291,7 +291,7 @@ static inline void ADC_temperature_handler() { #define THERM_RESPONSE_MAGNITUDE 128 #endif // acceptable temperature window size in C - #define THERM_WINDOW_SIZE 3 + #define THERM_WINDOW_SIZE 2 // TODO: make this configurable per build target? // (shorter time for hosts with a lower power-to-mass ratio) @@ -350,6 +350,19 @@ static inline void ADC_temperature_handler() { uint16_t ceil = (therm_ceil + 275 - therm_cal_offset - THERM_CAL_OFFSET) << 1; int16_t offset = pt - ceil; + // bias small errors toward zero, while leaving large errors mostly unaffected + // (a diff of 1 C is 2 ADC units, * 4 for therm lookahead, so it becomes 8) + // (but a diff of 1 C should only send a warning of magnitude 1) + // (this also makes it only respond to small errors at the time the error + // happened, not after the temperature has stabilized) + for(uint8_t foo=0; foo<5; foo++) { + if (offset > 0) { + offset --; + } else if (offset < 0) { + offset ++; + } + } + // Too hot? // (if it's too hot and still getting warmer...) if ((offset > 0) && (diff > 0)) { |