Patches to work around "register spill" compiler bug
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@ -24,6 +24,8 @@
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* temperature.cpp - temperature control
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*/
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#include "Marlin.h"
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#include "ultralcd.h"
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#include "temperature.h"
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@ -666,6 +668,17 @@ float Temperature::get_pid_output(int e) {
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* - Apply filament width to the extrusion rate (may move)
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* - Update the heated bed PID output value
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*/
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/**
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* The following line SOMETIMES results in the dreaded "unable to find a register to spill in class 'POINTER_REGS'"
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* compile error.
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* thermal_runaway_protection(&thermal_runaway_state_machine[e], &thermal_runaway_timer[e], current_temperature[e], target_temperature[e], e, THERMAL_PROTECTION_PERIOD, THERMAL_PROTECTION_HYSTERESIS);
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*
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* This is due to a bug in the C++ compiler used by the Arduino IDE from 1.6.10 to at least 1.8.1.
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*
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* The work around is to add the compiler flag "__attribute__((__optimize__("O2")))" to the declaration for manage_heater()
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*/
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//void Temperature::manage_heater() __attribute__((__optimize__("O2")));
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void Temperature::manage_heater() {
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if (!temp_meas_ready) return;
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@ -241,7 +241,8 @@ class Temperature {
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/**
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* Call periodically to manage heaters
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*/
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static void manage_heater();
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//static void manage_heater(); // changed to address compiler error
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static void manage_heater() __attribute__((__optimize__("O2")));
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/**
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* Preheating hotends
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