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Introduce PWM freq switching so that power could be averaged on shorter intervals

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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.
This commit is contained in:
Paul Fertser
2020-09-11 14:42:38 +03:00
parent aa7a035050
commit 30be5e0de4
7 changed files with 84 additions and 17 deletions
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2
workspace/TS100/Core/Inc/power.hpp
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@@ -25,6 +25,4 @@ extern expMovingAverage<uint32_t, wattHistoryFilter> x10WattHistory;
int32_t tempToX10Watts(int32_t rawTemp);
void setTipX10Watts(int32_t mw);
uint8_t X10WattsToPWM(int32_t milliWatts, uint8_t sample = 0);
int32_t PWMToX10Watts(uint8_t pwm, uint8_t sample = 0);
uint32_t availableW10(uint8_t sample) ;
#endif /* POWER_HPP_ */