From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001
From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:54:23 +0500
Subject: Initial commit

---
 Marlin/src/HAL/DUE/Tone.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Marlin/src/HAL/DUE/Tone.cpp

(limited to 'Marlin/src/HAL/DUE/Tone.cpp')

diff --git a/Marlin/src/HAL/DUE/Tone.cpp b/Marlin/src/HAL/DUE/Tone.cpp
new file mode 100644
index 0000000..9beb602
--- /dev/null
+++ b/Marlin/src/HAL/DUE/Tone.cpp
@@ -0,0 +1,60 @@
+/**
+ * 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
+ *
+ * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
+ *
+ * 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/>.
+ *
+ */
+
+/**
+ * Description: Tone function for Arduino Due and compatible (SAM3X8E)
+ * Derived from https://forum.arduino.cc/index.php?topic=136500.msg2903012#msg2903012
+ */
+
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfig.h"
+#include "HAL.h"
+
+static pin_t tone_pin;
+volatile static int32_t toggles;
+
+void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration) {
+  tone_pin = _pin;
+  toggles = 2 * frequency * duration / 1000;
+  HAL_timer_start(TONE_TIMER_NUM, 2 * frequency);
+}
+
+void noTone(const pin_t _pin) {
+  HAL_timer_disable_interrupt(TONE_TIMER_NUM);
+  extDigitalWrite(_pin, LOW);
+}
+
+HAL_TONE_TIMER_ISR() {
+  static uint8_t pin_state = 0;
+  HAL_timer_isr_prologue(TONE_TIMER_NUM);
+
+  if (toggles) {
+    toggles--;
+    extDigitalWrite(tone_pin, (pin_state ^= 1));
+  }
+  else noTone(tone_pin);                         // turn off interrupt
+}
+
+#endif // ARDUINO_ARCH_SAM
-- 
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