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Add tip compensation support

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This commit is contained in:
Ben V. Brown
2017-09-27 09:42:39 +10:00
parent fb08e8b56c
commit e351527dd2
9 changed files with 133 additions and 58 deletions
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11
workspace/TS100/src/hardware.c
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@@ -9,7 +9,11 @@
#include "hardware.h"
volatile uint16_t PWMSafetyTimer = 0;
volatile int16_t CalibrationTempOffset = 0;
void setCalibrationOffset(int16_t offSet)
{
CalibrationTempOffset=offSet;
}
uint16_t getHandleTemperature() {
// We return the current handle temperature in X10 C
// TMP36 in handle, 0.5V offset and then 10mV per deg C (0.75V @ 25C for example)
@@ -27,11 +31,12 @@ uint16_t getHandleTemperature() {
}
uint16_t tipMeasurementToC(uint16_t raw) {
return (raw / 33) - 16;
return ((raw-532) / 33) + (getHandleTemperature()/10) - CalibrationTempOffset;
//Surprisingly that appears to be a fairly good linear best fit
}
uint16_t ctoTipMeasurement(uint16_t temp) {
return (temp + 16) * 33;
//We need to compensate for cold junction temp
return ((temp-(getHandleTemperature()/10) + CalibrationTempOffset) * 33)+532;
}
uint16_t getTipInstantTemperature() {
uint16_t sum = 0;