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PID works with max PWM of 255

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David P Hilton
2018-10-29 08:17:58 -06:00
parent 43d11fa8f8
commit 73f07489fe
3 changed files with 10 additions and 7 deletions
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4
workspace/TS100/inc/power.hpp
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@@ -11,7 +11,9 @@
#ifndef POWER_HPP_
#define POWER_HPP_
extern history<uint16_t, 75> milliWattHistory;
const uint8_t hz = 32;
const uint8_t oscillationPeriod = 3.5 * hz;
extern history<uint16_t, oscillationPeriod> milliWattHistory;
int32_t tempToMilliWatts(int32_t rawTemp, uint16_t mass, uint8_t rawC);
void setTipMilliWatts(int32_t mw);

5
workspace/TS100/src/main.cpp
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@@ -929,6 +929,7 @@ void startPIDTask(void const *argument __unused) {
int32_t rawC = ctoTipMeasurement(100) - ctoTipMeasurement(101); // 1*C change in raw.
currentlyActiveTemperatureTarget = 0; // Force start with no output (off). If in sleep / soldering this will
// be over-ridden rapidly
history<int16_t> tempError = {{0}, 0, 0};
pidTaskNotification = xTaskGetCurrentTaskHandle();
@@ -955,8 +956,8 @@ void startPIDTask(void const *argument __unused) {
// P term - total power needed to hit target temp next cycle.
// thermal mass = 1690 milliJ/*C for my tip.
// = Watts*Seconds to raise Temp from room temp to +100*C, divided by 100*C.
// divided by 4 to let I term dominate near set point.
const uint16_t mass = 1690 / 4;
// divided by 8 to let I term dominate near set point.
const uint16_t mass = 1690 / 8;
int32_t milliWattsNeeded = tempToMilliWatts(tempError.average(), mass, rawC);
milliWattsOut += milliWattsNeeded;

8
workspace/TS100/src/power.cpp
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@@ -9,11 +9,11 @@
#include <Settings.h>
#include <hardware.h>
history<uint16_t, 75> milliWattHistory = {{0}, 0, 0};
const uint8_t tipResistance = 87;
const uint8_t hz = 33;
const uint8_t maxPWM = 100;
const uint8_t maxPWM = 255;
history<uint16_t, oscillationPeriod> milliWattHistory = {{0}, 0, 0};
int32_t tempToMilliWatts(int32_t rawTemp, uint16_t mass, uint8_t rawC) {
// mass is in milliJ/*C, rawC is raw per degree C