65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/*
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AudioOutputI2S
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Base class for an I2S output port
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Copyright (C) 2017 Earle F. Philhower, III
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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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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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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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#pragma once
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#include "AudioOutput.h"
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class AudioOutputI2S : public AudioOutput
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{
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public:
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#if defined(ESP32) || defined(ESP8266)
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AudioOutputI2S(int port=0, int output_mode=EXTERNAL_I2S, int dma_buf_count = 8, int use_apll=APLL_DISABLE);
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bool SetPinout(int bclkPin, int wclkPin, int doutPin);
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enum : int { APLL_AUTO = -1, APLL_ENABLE = 1, APLL_DISABLE = 0 };
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enum : int { EXTERNAL_I2S = 0, INTERNAL_DAC = 1, INTERNAL_PDM = 2 };
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#elif defined(ARDUINO_ARCH_RP2040)
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AudioOutputI2S(long sampleRate = 44100, pin_size_t sck = 26, pin_size_t data = 28);
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#endif
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virtual ~AudioOutputI2S() override;
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virtual bool SetRate(int hz) override;
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virtual bool SetBitsPerSample(int bits) override;
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virtual bool SetChannels(int channels) override;
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virtual bool begin() override { return begin(true); }
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virtual bool ConsumeSample(int16_t sample[2]) override;
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virtual void flush() override;
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virtual bool stop() override;
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bool begin(bool txDAC);
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bool SetOutputModeMono(bool mono); // Force mono output no matter the input
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protected:
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bool SetPinout();
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virtual int AdjustI2SRate(int hz) { return hz; }
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uint8_t portNo;
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int output_mode;
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bool mono;
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bool i2sOn;
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int dma_buf_count;
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int use_apll;
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// We can restore the old values and free up these pins when in NoDAC mode
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uint32_t orig_bck;
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uint32_t orig_ws;
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uint8_t bclkPin;
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uint8_t wclkPin;
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uint8_t doutPin;
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};
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