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Merge pull request #1813 from thinkyhead/fixup_probing

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Fix bad thermal runaway trigger
This commit is contained in:
Scott Lahteine 2015-04-04 14:41:43 -07:00
commit 6c5f07c5cb
1 changed files with 29 additions and 34 deletions
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45
Marlin/temperature.cpp
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@ -76,15 +76,14 @@ unsigned char soft_pwm_bed;
#define HAS_HEATER_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_PERIOD) && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0)
#define HAS_BED_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_BED_PERIOD) && THERMAL_RUNAWAY_PROTECTION_BED_PERIOD > 0 && TEMP_SENSOR_BED != 0)
#if HAS_HEATER_THERMAL_PROTECTION || HAS_BED_THERMAL_PROTECTION
enum TRState { TRInactive, TRFirstHeating, TRStable };
static bool thermal_runaway = false;
enum TRState { TRReset, TRInactive, TRFirstHeating, TRStable, TRRunaway };
void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc);
#if HAS_HEATER_THERMAL_PROTECTION
static TRState thermal_runaway_state_machine[4] = { TRInactive, TRInactive, TRInactive, TRInactive };
static TRState thermal_runaway_state_machine[4] = { TRReset, TRReset, TRReset, TRReset };
static unsigned long thermal_runaway_timer[4]; // = {0,0,0,0};
#endif
#if HAS_BED_THERMAL_PROTECTION
static TRState thermal_runaway_bed_state_machine = TRInactive;
static TRState thermal_runaway_bed_state_machine = TRReset;
static unsigned long thermal_runaway_bed_timer;
#endif
#endif
@ -1007,7 +1006,7 @@ void setWatch() {
void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc) {
static int tr_target_temperature[EXTRUDERS+1];
static float tr_target_temperature[EXTRUDERS+1] = { 0.0 };
/*
SERIAL_ECHO_START;
@ -1023,20 +1022,23 @@ void setWatch() {
SERIAL_ECHOPGM(target_temperature);
SERIAL_EOL;
*/
if (target_temperature == 0 || thermal_runaway) {
*state = TRInactive;
*timer = 0;
return;
}
int heater_index = heater_id >= 0 ? heater_id : EXTRUDERS;
// If the target temperature changes, restart
if (tr_target_temperature[heater_index] != target_temperature)
*state = TRReset;
switch (*state) {
case TRReset:
*timer = 0;
*state = TRInactive;
break;
// Inactive state waits for a target temperature to be set
case TRInactive:
if (target_temperature > 0) {
*state = TRFirstHeating;
tr_target_temperature[heater_index] = target_temperature;
*state = TRFirstHeating;
}
break;
// When first heating, wait for the temperature to be reached then go to Stable state
@ -1045,32 +1047,25 @@ void setWatch() {
break;
// While the temperature is stable watch for a bad temperature
case TRStable:
{
// If the target temperature changes, restart
if (tr_target_temperature[heater_index] != target_temperature) {
*state = TRInactive;
break;
}
// If the temperature is over the target (-hysteresis) restart the timer
if (temperature >= tr_target_temperature[heater_index] - hysteresis_degc) *timer = millis();
if (temperature >= tr_target_temperature[heater_index] - hysteresis_degc)
*timer = millis();
// If the timer goes too long without a reset, trigger shutdown
else if (millis() > *timer + period_seconds * 1000UL) {
else if (millis() > *timer + period_seconds * 1000UL)
*state = TRRunaway;
break;
case TRRunaway:
SERIAL_ERROR_START;
SERIAL_ERRORLNPGM(MSG_THERMAL_RUNAWAY_STOP);
if (heater_id < 0) SERIAL_ERRORLNPGM("bed"); else SERIAL_ERRORLN(heater_id);
LCD_ALERTMESSAGEPGM(MSG_THERMAL_RUNAWAY);
thermal_runaway = true;
for (;;) {
disable_heater();
disable_all_steppers();
for (;;) {
manage_heater();
lcd_update();
}
}
} break;
}
}
#endif // HAS_HEATER_THERMAL_PROTECTION || HAS_BED_THERMAL_PROTECTION