146 lines
3.6 KiB
C++
146 lines
3.6 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __BUZZER_H__
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#define __BUZZER_H__
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#include "types.h"
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#include "fastio.h"
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#include "circularqueue.h"
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#include "temperature.h"
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#include "MarlinConfig.h"
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#define TONE_QUEUE_LENGTH 4
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/**
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* @brief Tone structure
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* @details Simple abstraction of a tone based on a duration and a frequency.
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*/
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struct tone_t {
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uint16_t duration;
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uint16_t frequency;
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};
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/**
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* @brief Buzzer class
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*/
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class Buzzer {
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private:
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struct state_t {
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tone_t tone;
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uint32_t endtime;
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} state;
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protected:
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CircularQueue<tone_t, TONE_QUEUE_LENGTH> buffer;
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/**
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* @brief Inverts the sate of a digital PIN
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* @details This will invert the current state of an digital IO pin.
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*/
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void invert() {
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TOGGLE(BEEPER_PIN);
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}
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/**
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* @brief Turn off a digital PIN
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* @details Alias of digitalWrite(PIN, LOW) using FastIO
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*/
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void off() {
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WRITE(BEEPER_PIN, LOW);
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}
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/**
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* @brief Turn on a digital PIN
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* @details Alias of digitalWrite(PIN, HIGH) using FastIO
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*/
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void on() {
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WRITE(BEEPER_PIN, HIGH);
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}
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/**
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* @brief Resets the state of the class
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* @details Brings the class state to a known one.
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*/
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void reset() {
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this->off();
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this->state.endtime = 0;
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}
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public:
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/**
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* @brief Class constructor
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*/
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Buzzer() {
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SET_OUTPUT(BEEPER_PIN);
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this->reset();
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}
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/**
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* @brief Add a tone to the queue
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* @details Adds a tone_t structure to the ring buffer, will block IO if the
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* queue is full waiting for one slot to get available.
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*
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* @param duration Duration of the tone in milliseconds
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* @param frequency Frequency of the tone in hertz
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*/
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void tone(const uint16_t &duration, const uint16_t &frequency=0) {
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while (buffer.isFull()) {
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this->tick();
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thermalManager.manage_heater();
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}
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tone_t tone = { duration, frequency };
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this->buffer.enqueue(tone);
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}
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/**
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* @brief Loop function
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* @details This function should be called at loop, it will take care of
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* playing the tones in the queue.
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*/
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virtual void tick() {
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const millis_t now = millis();
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if (!this->state.endtime) {
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if (this->buffer.isEmpty()) return;
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this->state.tone = this->buffer.dequeue();
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this->state.endtime = now + this->state.tone.duration;
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if (this->state.tone.frequency > 0) {
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#if ENABLED(SPEAKER)
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CRITICAL_SECTION_START;
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::tone(BEEPER_PIN, this->state.tone.frequency, this->state.tone.duration);
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CRITICAL_SECTION_END;
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#else
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this->on();
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#endif
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}
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}
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else if (ELAPSED(now, this->state.endtime)) this->reset();
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}
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};
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extern Buzzer buzzer;
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#endif
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