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30be5e0de4
With this a TS-I tip is usable with a small netbook 19 V / 30 W PSU with power limit set to 40 W (38.9 W is reported during the heating up stage). Without this the device just reboots on attempt to turn on the heater (unless the power limit is set to 10 or even 5 W). This code doesn't affect maximum power available and allows up to 73 W when a beefy 24 V / 96 W PSU is used. Should be useful for all models, not just TS100. The fixed comments are based on calculations, not measurements! Fixes #693.
29 lines
935 B
C++
29 lines
935 B
C++
/*
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* Power.hpp
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*
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* Created on: 28 Oct, 2018
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* Authors: Ben V. Brown, David Hilton (David's Idea)
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*/
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#include "stdint.h"
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#include <history.hpp>
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#include "BSP.h"
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#include "expMovingAverage.h"
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#include "../../configuration.h"
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#ifndef POWER_HPP_
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#define POWER_HPP_
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// thermal mass = 1690 milliJ/*C for my tip.
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// -> Wattsx10*Seconds to raise Temp from room temp to +100*C, divided by 100*C.
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// we divide mass by 20 to let the I term dominate near the set point.
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// This is necessary because of the temp noise and thermal lag in the system.
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// Once we have feed-forward temp estimation we should be able to better tune this.
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const uint8_t wattHistoryFilter = 24; // I term look back weighting
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extern expMovingAverage<uint32_t, wattHistoryFilter> x10WattHistory;
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int32_t tempToX10Watts(int32_t rawTemp);
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void setTipX10Watts(int32_t mw);
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uint8_t X10WattsToPWM(int32_t milliWatts, uint8_t sample = 0);
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#endif /* POWER_HPP_ */
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