Dooho Yi
91f92c0e6c
migration from 'smp_v1p0' dev. for 'sampler' -> skip irrelavant note msg. and keep playing
160 lines
4.6 KiB
C++
160 lines
4.6 KiB
C++
/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <Arduino.h>
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#include "control_wm8731.h"
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#include "Wire.h"
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#define WM8731_I2C_ADDR 0x1A
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//#define WM8731_I2C_ADDR 0x1B
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#define WM8731_REG_LLINEIN 0
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#define WM8731_REG_RLINEIN 1
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#define WM8731_REG_LHEADOUT 2
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#define WM8731_REG_RHEADOUT 3
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#define WM8731_REG_ANALOG 4
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#define WM8731_REG_DIGITAL 5
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#define WM8731_REG_POWERDOWN 6
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#define WM8731_REG_INTERFACE 7
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#define WM8731_REG_SAMPLING 8
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#define WM8731_REG_ACTIVE 9
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#define WM8731_REG_RESET 15
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bool AudioControlWM8731::enable(void)
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{
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Wire.begin();
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delay(5);
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//write(WM8731_REG_RESET, 0);
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write(WM8731_REG_INTERFACE, 0x02); // I2S, 16 bit, MCLK slave
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write(WM8731_REG_SAMPLING, 0x20); // 256*Fs, 44.1 kHz, MCLK/1
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// In order to prevent pops, the DAC should first be soft-muted (DACMU),
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// the output should then be de-selected from the line and headphone output
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// (DACSEL), then the DAC powered down (DACPD).
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write(WM8731_REG_DIGITAL, 0x08); // DAC soft mute
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write(WM8731_REG_ANALOG, 0x00); // disable all
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write(WM8731_REG_POWERDOWN, 0x00); // codec powerdown
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write(WM8731_REG_LHEADOUT, 0x80); // volume off
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write(WM8731_REG_RHEADOUT, 0x80);
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delay(100); // how long to power up?
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write(WM8731_REG_ACTIVE, 1);
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delay(5);
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write(WM8731_REG_DIGITAL, 0x00); // DAC unmuted
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write(WM8731_REG_ANALOG, 0x10); // DAC selected
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return true;
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}
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bool AudioControlWM8731::write(unsigned int reg, unsigned int val)
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{
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Wire.beginTransmission(WM8731_I2C_ADDR);
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Wire.write((reg << 1) | ((val >> 8) & 1));
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Wire.write(val & 0xFF);
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Wire.endTransmission();
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return true;
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}
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bool AudioControlWM8731::volumeInteger(unsigned int n)
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{
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// n = 127 for max volume (+6 dB)
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// n = 48 for min volume (-73 dB)
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// n = 0 to 47 for mute
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if (n > 127) n = 127;
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//Serial.print("volumeInteger, n = ");
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//Serial.println(n);
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write(WM8731_REG_LHEADOUT, n | 0x180);
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write(WM8731_REG_RHEADOUT, n | 0x80);
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return true;
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}
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bool AudioControlWM8731::inputLevel(float n)
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{
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// range is 0x00 (min) - 0x1F (max)
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int _level = int(n * 31.f);
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_level = _level > 0x1F ? 0x1F : _level;
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write(WM8731_REG_LLINEIN, _level);
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write(WM8731_REG_RLINEIN, _level);
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return true;
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}
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bool AudioControlWM8731::inputSelect(int n)
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{
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if (n == AUDIO_INPUT_LINEIN) {
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write(WM8731_REG_ANALOG, 0x12);
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} else if (n == AUDIO_INPUT_MIC) {
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write(WM8731_REG_ANALOG, 0x15);
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} else {
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return false;
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}
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return true;
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}
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/******************************************************************/
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bool AudioControlWM8731master::enable(void)
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{
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Wire.begin();
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delay(5);
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//write(WM8731_REG_RESET, 0);
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write(WM8731_REG_INTERFACE, 0x42); // I2S, 16 bit, MCLK master
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write(WM8731_REG_SAMPLING, 0x20); // 256*Fs, 44.1 kHz, MCLK/1
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// In order to prevent pops, the DAC should first be soft-muted (DACMU),
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// the output should then be de-selected from the line and headphone output
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// (DACSEL), then the DAC powered down (DACPD).
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write(WM8731_REG_DIGITAL, 0x08); // DAC soft mute
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write(WM8731_REG_ANALOG, 0x00); // disable all
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write(WM8731_REG_POWERDOWN, 0x00); // codec powerdown
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write(WM8731_REG_LHEADOUT, 0x80); // volume off
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write(WM8731_REG_RHEADOUT, 0x80);
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delay(100); // how long to power up?
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write(WM8731_REG_ACTIVE, 1);
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delay(5);
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write(WM8731_REG_DIGITAL, 0x00); // DAC unmuted
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write(WM8731_REG_ANALOG, 0x10); // DAC selected
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return true;
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}
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