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Approx thermal runaway config

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This commit is contained in:
Ben V. Brown
2021-06-06 08:14:40 +10:00
parent 49167fdc5a
commit 966f4d732d
4 changed files with 50 additions and 4 deletions
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37
source/Core/Threads/PIDThread.cpp
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@@ -19,6 +19,7 @@ static TickType_t powerPulseDurationUnit = (5 * TICKS_100MS) / 2; // 250 ms
TaskHandle_t pidTaskNotification = NULL;
uint32_t currentTempTargetDegC = 0; // Current temperature target in C
int32_t powerSupplyWattageLimit = 0;
bool heaterThermalRunaway = false;
/* StartPIDTask function */
void startPIDTask(void const *argument __unused) {
/*
@@ -32,8 +33,10 @@ void startPIDTask(void const *argument __unused) {
history<int32_t, PID_TIM_HZ> tempError = {{0}, 0, 0};
currentTempTargetDegC = 0; // Force start with no output (off). If in sleep / soldering this will
// be over-ridden rapidly
pidTaskNotification = xTaskGetCurrentTaskHandle();
uint32_t PIDTempTarget = 0;
pidTaskNotification = xTaskGetCurrentTaskHandle();
uint32_t PIDTempTarget = 0;
uint16_t tipTempCRunawayTemp = 0;
TickType_t runawaylastChangeTime = 0;
#ifdef SLEW_LIMIT
int32_t x10WattsOutLast = 0;
#endif
@@ -91,6 +94,33 @@ void startPIDTask(void const *argument __unused) {
// and counters extra power if the iron is no longer losing temp.
// basically: temp - lastTemp
// Unfortunately, our temp signal is too noisy to really help.
// Check for thermal runaway, where it has been x seconds with negligible (y) temp rise
// While trying to actively heat
if ((tError > THERMAL_RUNAWAY_TEMP_C)) {
// Temp error is high
int16_t delta = (int16_t)currentTipTempInC - (int16_t)tipTempCRunawayTemp;
if (delta < 0) {
delta = -delta;
}
if (delta > THERMAL_RUNAWAY_TEMP_C) {
// We have heated up more than the threshold, reset the timer
tipTempCRunawayTemp = currentTipTempInC;
runawaylastChangeTime = xTaskGetTickCount();
} else {
if ((xTaskGetTickCount() - runawaylastChangeTime) > (THERMAL_RUNAWAY_TIME_SEC * TICKS_SECOND)) {
// It has taken too long to rise
heaterThermalRunaway = true;
}
}
} else {
tipTempCRunawayTemp = currentTipTempInC;
runawaylastChangeTime = xTaskGetTickCount();
}
} else {
tipTempCRunawayTemp = currentTipTempInC;
runawaylastChangeTime = xTaskGetTickCount();
}
// If the user turns on the option of using an occasional pulse to keep the power bank on
if (systemSettings.KeepAwakePulse) {
@@ -111,6 +141,9 @@ void startPIDTask(void const *argument __unused) {
if (getTipRawTemp(0) > (0x7FFF - 32)) {
x10WattsOut = 0;
}
if (heaterThermalRunaway) {
x10WattsOut = 0;
}
if (systemSettings.powerLimit && x10WattsOut > (systemSettings.powerLimit * 10)) {
x10WattsOut = systemSettings.powerLimit * 10;
}