You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.3 KiB
91 lines
2.3 KiB
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef __SPEAKER_H__
|
|
#define __SPEAKER_H__
|
|
|
|
#include "buzzer.h"
|
|
|
|
class Speaker: public Buzzer {
|
|
private:
|
|
typedef Buzzer super;
|
|
|
|
struct state_t {
|
|
tone_t tone;
|
|
uint16_t period;
|
|
uint16_t counter;
|
|
} state;
|
|
|
|
protected:
|
|
/**
|
|
* @brief Resets the state of the class
|
|
* @details Brings the class state to a known one.
|
|
*/
|
|
void reset() {
|
|
super::reset();
|
|
this->state.period = 0;
|
|
this->state.counter = 0;
|
|
}
|
|
|
|
public:
|
|
/**
|
|
* @brief Class constructor
|
|
*/
|
|
Speaker() {
|
|
this->reset();
|
|
}
|
|
|
|
/**
|
|
* @brief Loop function
|
|
* @details This function should be called at loop, it will take care of
|
|
* playing the tones in the queue.
|
|
*/
|
|
virtual void tick() {
|
|
if (!this->state.counter) {
|
|
if (this->buffer.isEmpty()) return;
|
|
|
|
this->reset();
|
|
this->state.tone = this->buffer.dequeue();
|
|
|
|
// Period is uint16, min frequency will be ~16Hz
|
|
this->state.period = 1000000UL / this->state.tone.frequency;
|
|
|
|
this->state.counter =
|
|
(this->state.tone.counter * 1000L) / this->state.period;
|
|
|
|
this->state.period >>= 1;
|
|
this->state.counter <<= 1;
|
|
} else {
|
|
const uint32_t now = micros();
|
|
static uint32_t next = now + this->state.period;
|
|
|
|
if (now >= next) {
|
|
--this->state.counter;
|
|
next = now + this->state.period;
|
|
if (this->state.tone.frequency > 0) this->invert();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
#endif
|