Non-blocking buzzer
João Brázio
9 years ago
committed by
Scott Lahteine
parent
26f8f54c56
commit
5b5aa1572b
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/**
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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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#include "Marlin.h"
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#if HAS_BUZZER
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#include "buzzer.h"
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#include "ultralcd.h"
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void buzz(long duration, uint16_t freq) {
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if (freq > 0) {
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#if ENABLED(LCD_USE_I2C_BUZZER)
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lcd_buzz(duration, freq);
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#elif PIN_EXISTS(BEEPER) // on-board buzzers have no further condition
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SET_OUTPUT(BEEPER_PIN);
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#if ENABLED(SPEAKER) // a speaker needs a AC ore a pulsed DC
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//tone(BEEPER_PIN, freq, duration); // needs a PWMable pin
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unsigned int delay = 1000000 / freq / 2;
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int i = duration * freq / 1000;
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while (i--) {
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WRITE(BEEPER_PIN, HIGH);
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delayMicroseconds(delay);
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WRITE(BEEPER_PIN, LOW);
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delayMicroseconds(delay);
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}
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#else // buzzer has its own resonator - needs a DC
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WRITE(BEEPER_PIN, HIGH);
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delay(duration);
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WRITE(BEEPER_PIN, LOW);
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#endif
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#else
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delay(duration);
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#endif
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}
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else {
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delay(duration);
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}
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}
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#endif
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@ -0,0 +1,146 @@
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/**
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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 __CIRCULARQUEUE_H__
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#define __CIRCULARQUEUE_H__
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#include <Arduino.h>
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/**
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* @brief Circular Queue class
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* @details Implementation of the classic ring buffer data structure
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*/
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template<typename T, int N>
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class CircularQueue {
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private:
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/**
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* @brief Buffer structure
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* @details This structure consolidates all the overhead required to handle
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* a circular queue such as the pointers and the buffer vector.
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*/
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struct buffer_t {
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uint8_t head;
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uint8_t tail;
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uint8_t size;
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uint8_t length;
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T queue[N];
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} buffer;
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public:
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/**
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* @brief Class constructor
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* @details This class requires two template parameters, T defines the type
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* of the items this queue will handle and N defines the maximum number of
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* items that can be stored on the queue.
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*/
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CircularQueue<T, N>() {
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this->buffer.length = N;
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this->buffer.size = this->buffer.head = this->buffer.tail = 0;
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}
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/**
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* @brief Removes and returns a item from the queue
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* @details Removes the oldest item on the queue which is pointed by the
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* buffer_t head variable, this item is then returned to the caller.
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* @return type T item
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*/
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T dequeue() {
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if (this->isEmpty()) return T();
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T const item = this->buffer.queue[this->buffer.head++];
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--this->buffer.size;
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if (this->buffer.head == this->buffer.length)
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this->buffer.head = 0;
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return item;
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}
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/**
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* @brief Adds an item to the queue
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* @details Adds a item to the queue on the location pointed by the buffer_t
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* tail vairable, will return false if there is no queue space available.
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*
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* @param item Item to be added to the queue
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* @return true if the operation was successfull
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*/
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bool enqueue(T const &item) {
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if (this->isFull()) return false;
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this->buffer.queue[this->buffer.tail++] = item;
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++this->buffer.size;
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if (this->buffer.tail == this->buffer.length)
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this->buffer.tail = 0;
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return true;
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}
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/**
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* @brief Checks if the queue has no items
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* @details Returns true if there are no items on the queue, false otherwise.
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* @return true if queue is empty
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*/
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bool isEmpty() {
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return this->buffer.size == 0;
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}
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/**
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* @brief Checks if the queue is full
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* @details Returns true if the queue is full, false otherwise.
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* @return true if queue is full
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*/
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bool isFull() {
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return this->buffer.size == this->buffer.length;
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}
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/**
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* @brief Gets the queue size
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* @details Returns the maximum number of items a queue can have.
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* @return the queue lenght
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*/
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uint8_t length() {
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return this->buffer.length;
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}
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/**
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* @brief Gets the next item from the queue without removing it
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* @details Returns the next item on the queue but the item is not removed
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* from the queue nor the pointers updated.
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* @return the queue size
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*/
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uint8_t peek() {
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return this->buffer.queue[this->buffer.head];
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}
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/**
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* @brief Gets the number of items on the queue
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* @details Returns the current number of items stored on the queue.
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* @return type T item
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*/
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uint8_t size() {
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return this->buffer.size;
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}
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};
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#endif
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@ -0,0 +1,92 @@
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/**
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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 __SPEAKER_H__
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#define __SPEAKER_H__
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#include "buzzer.h"
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class Speaker: public Buzzer {
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private:
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typedef Buzzer super;
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struct state_t {
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tone_t tone;
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uint16_t period;
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uint16_t cycles;
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} state;
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protected:
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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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super::reset();
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this->state.period = 0;
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this->state.cycles = 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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Speaker() {
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this->reset();
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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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if (!this->state.cycles) {
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if (this->buffer.isEmpty()) return;
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this->reset();
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this->state.tone = this->buffer.dequeue();
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// Period is uint16, min frequency will be ~16Hz
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this->state.period = 1000000UL / this->state.tone.frequency;
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this->state.cycles =
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(this->state.tone.duration * 1000L) / this->state.period;
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this->state.period >>= 1;
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this->state.cycles <<= 1;
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}
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else {
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uint32_t const us = micros();
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static uint32_t next = us + this->state.period;
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if (us >= next) {
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--this->state.cycles;
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next = us + this->state.period;
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if (this->state.tone.frequency > 0) this->invert();
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}
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}
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}
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};
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#endif
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