1 files changed, 84 insertions, 0 deletions
diff --git a/Marlin/src/libs/buzzer.cpp b/Marlin/src/libs/buzzer.cpp
new file mode 100644
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+++ b/Marlin/src/libs/buzzer.cpp
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+/**
+ * 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/>.
+ *
+ */
+
+#include "../inc/MarlinConfig.h"
+
+#if USE_BEEPER
+
+#include "buzzer.h"
+#include "../module/temperature.h"
+#include "../lcd/marlinui.h"
+
+#if ENABLED(EXTENSIBLE_UI)
+  #include "../lcd/extui/ui_api.h"
+#endif
+
+Buzzer::state_t Buzzer::state;
+CircularQueue<tone_t, TONE_QUEUE_LENGTH> Buzzer::buffer;
+Buzzer buzzer;
+
+/**
+ * @brief Add a tone to the queue
+ * @details Adds a tone_t structure to the ring buffer, will block IO if the
+ *          queue is full waiting for one slot to get available.
+ *
+ * @param duration Duration of the tone in milliseconds
+ * @param frequency Frequency of the tone in hertz
+ */
+void Buzzer::tone(const uint16_t duration, const uint16_t frequency/*=0*/) {
+  if (!ui.buzzer_enabled) return;
+  while (buffer.isFull()) {
+    tick();
+    thermalManager.manage_heater();
+  }
+  tone_t tone = { duration, frequency };
+  buffer.enqueue(tone);
+}
+
+void Buzzer::tick() {
+  if (!ui.buzzer_enabled) return;
+  const millis_t now = millis();
+
+  if (!state.endtime) {
+    if (buffer.isEmpty()) return;
+
+    state.tone = buffer.dequeue();
+    state.endtime = now + state.tone.duration;
+
+    if (state.tone.frequency > 0) {
+      #if ENABLED(EXTENSIBLE_UI) && DISABLED(EXTUI_LOCAL_BEEPER)
+        CRITICAL_SECTION_START();
+        ExtUI::onPlayTone(state.tone.frequency, state.tone.duration);
+        CRITICAL_SECTION_END();
+      #elif ENABLED(SPEAKER)
+        CRITICAL_SECTION_START();
+        ::tone(BEEPER_PIN, state.tone.frequency, state.tone.duration);
+        CRITICAL_SECTION_END();
+      #else
+        on();
+      #endif
+    }
+  }
+  else if (ELAPSED(now, state.endtime)) reset();
+}
+
+#endif // USE_BEEPER