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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
- *
- * 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 <http://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"
- #include "timers.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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