Enable power panic.

ProjectOptions.cmake

@@ -171,7 +171,7 @@ message(STATUS "Resources: ${RESOURCES}")
 set(PRINTERS_WITH_FILAMENT_SENSOR_BINARY "MINI")
 set(PRINTERS_WITH_INIT_TRINAMIC_FROM_MARLIN_ONLY "MINI")
 set(PRINTERS_WITH_ADVANCED_PAUSE "MINI")
-set(PRINTERS_WITH_POWER_PANIC)
+set(PRINTERS_WITH_POWER_PANIC "MINI")
 set(PRINTERS_WITH_SELFTEST "MINI")
 set(PRINTERS_WITH_RESOURCES "MINI")
 set(PRINTERS_WITH_BOWDEN_EXTRUDER "MINI")

include/marlin/Configuration_MINI_adv.h

@@ -1714,6 +1714,29 @@
     #define AXIS_MEASURE_STALL_GUARD 130
     #define AXIS_MEASURE_CRASH_PERIOD 210
 
+    /**
+     * Recovery from power failure. This is a distinct implementation from
+     * POWER_LOSS_RECOVERY specific to Prusa printers.
+     */
+    #define POWER_PANIC
+
+    #ifdef POWER_PANIC
+        #define POWER_PANIC_Z_LIFT_CYCLES 4 // 4xFullStep cycles = ~0.64mm
+        #define POWER_PANIC_MAX_BED_DIFF 10 // Maximum bed temperature (C) difference for auto-recovery
+
+        // Milliseconds to wait on hold before auto-restarting during short power failures
+        #define POWER_PANIC_HOLD_RST_MS 5000
+
+        // TODO: currently arbitrary, needs to include optimal feedrates too
+        #define POWER_PANIC_X_CURRENT 350 // (mA) RMS current for parking
+        #define POWER_PANIC_X_FEEDRATE 200 // (mm/s, running at POWER_PANIC_X_CURRENT)
+
+        #define POWER_PANIC_Z_CURRENT 350 // (mA) RMS current _after_ alignment
+        #define POWER_PANIC_Z_FEEDRATE 50 // (mm/s, running at default current)
+
+        #define POWER_PANIC_E_CURRENT 300 // (mA) RMS current
+    #endif
+
 /**
    * TMC2130, TMC2160, TMC2660, TMC5130, and TMC5160 only
    * Use StallGuard2 to sense an obstacle and trigger an endstop.

src/common/hwio_pindef.h

@@ -165,7 +165,8 @@
             MACRO_FUNCTION(buddy::hw::InputPin, jogWheelENC, buddy::hw::IoPort::E COMMA buddy::hw::IoPin::p12, IMode::input COMMA Pull::up, buddy::hw::noHandler)                                  \
             MACRO_FUNCTION(buddy::hw::InputPin, fanPrintTach, buddy::hw::IoPort::E COMMA buddy::hw::IoPin::p10, IMode::input COMMA Pull::up, buddy::hw::noHandler)                                 \
             MACRO_FUNCTION(buddy::hw::InputPin, fanHeatBreakTach, buddy::hw::IoPort::E COMMA buddy::hw::IoPin::p14, IMode::input COMMA Pull::up, buddy::hw::noHandler)                             \
-            MACRO_FUNCTION(buddy::hw::OutputPin, extFlashCs, buddy::hw::IoPort::D COMMA buddy::hw::IoPin::p7, Pin::State::high COMMA OMode::pushPull COMMA OSpeed::high, buddy::hw::noHandler)
+            MACRO_FUNCTION(buddy::hw::OutputPin, extFlashCs, buddy::hw::IoPort::D COMMA buddy::hw::IoPin::p7, Pin::State::high COMMA OMode::pushPull COMMA OSpeed::high, buddy::hw::noHandler)     \
+            MACRO_FUNCTION(buddy::hw::InterruptPin, acFault, buddy::hw::IoPort::A COMMA buddy::hw::IoPin::p3, IMode::IT_falling COMMA Pull::none COMMA configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY COMMA 0, power_panic::ac_fault_isr)
     #else
         #error "Unknown board."
     #endif

src/common/power_panic.cpp

@@ -902,7 +902,6 @@ void ac_fault_isr() {
     // heaters are *already* disabled via HW, but stop temperature and fan regulation too
     thermalManager.disable_all_heaters();
     thermalManager.zero_fan_speeds();
-    thermalManager.suspend_heatbreak_fan(2000);
 
     // stop & disable endstops
     media_print_quick_stop(MEDIA_PRINT_UNDEF_POSITION);