1 files changed, 55 insertions, 0 deletions
diff --git a/Marlin/src/feature/leds/tempstat.cpp b/Marlin/src/feature/leds/tempstat.cpp
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+++ b/Marlin/src/feature/leds/tempstat.cpp
@@ -0,0 +1,55 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Marlin RGB LED general support
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(TEMP_STAT_LEDS)
+
+#include "tempstat.h"
+#include "../../module/temperature.h"
+
+void handle_status_leds() {
+  static int8_t old_red = -1;  // Invalid value to force LED initialization
+  static millis_t next_status_led_update_ms = 0;
+  if (ELAPSED(millis(), next_status_led_update_ms)) {
+    next_status_led_update_ms += 500; // Update every 0.5s
+    float max_temp = TERN0(HAS_HEATED_BED, _MAX(thermalManager.degTargetBed(), thermalManager.degBed()));
+    HOTEND_LOOP()
+      max_temp = _MAX(max_temp, thermalManager.degHotend(e), thermalManager.degTargetHotend(e));
+    const int8_t new_red = (max_temp > 55.0) ? HIGH : (max_temp < 54.0 || old_red < 0) ? LOW : old_red;
+    if (new_red != old_red) {
+      old_red = new_red;
+      #if PIN_EXISTS(STAT_LED_RED)
+        WRITE(STAT_LED_RED_PIN, new_red);
+      #endif
+      #if PIN_EXISTS(STAT_LED_BLUE)
+        WRITE(STAT_LED_BLUE_PIN, !new_red);
+      #endif
+    }
+  }
+}
+
+#endif // TEMP_STAT_LEDS