HackRF-Treasure-Chest/Software/portapack-mayhem/firmware/application/audio.cpp

247 lines
4.7 KiB
C++
Raw Normal View History

2022-09-22 18:26:57 +02:00
/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "audio.hpp"
#include "portapack.hpp"
using portapack::clock_manager;
#include "portapack_hal.hpp"
#include "portapack_persistent_memory.hpp"
#include "i2s.hpp"
using namespace lpc43xx;
namespace audio {
namespace {
// "Master": I2S peripheral generates SCK/WS, transmits to audio codec.
constexpr i2s::ConfigTX i2s0_config_tx_master_base_clk {
.dao = i2s::DAO {
.wordwidth = i2s::WordWidth::Bits16,
.mono = 0,
.stop = 1,
.reset = 0,
.ws_sel = 0, // Master
.ws_halfperiod = 0x0f,
.mute = 1,
},
.txrate = i2s::MCLKRate {
.x_divider = 0,
.y_divider = 0,
},
.txbitrate = i2s::BitRate {
.bitrate = 7,
},
.txmode = i2s::Mode {
.clksel = i2s::ClockSelect::BaseAudioClkOrExternalMCLK,
.four_pin = 0,
.mclk_out_en = 1,
},
.sck_in_sel = 1,
};
constexpr i2s::ConfigRX i2s0_config_rx_four_wire {
.dai = i2s::DAI {
.wordwidth = i2s::WordWidth::Bits16,
.mono = 0,
.stop = 1,
.reset = 0,
.ws_sel = 0, // Master
.ws_halfperiod = 0x0f,
},
.rxrate = i2s::MCLKRate {
.x_divider = 0,
.y_divider = 0,
},
.rxbitrate = i2s::BitRate {
.bitrate = 7,
},
.rxmode = i2s::Mode {
.clksel = i2s::ClockSelect::FractionalDivider,
.four_pin = 1,
.mclk_out_en = 0,
},
.sck_in_sel = 0,
};
// "Slave": I2S controlled by external SCK/WS, received from audio codec.
constexpr i2s::ConfigTX i2s0_config_tx_slave_base_clk {
.dao = i2s::DAO {
.wordwidth = i2s::WordWidth::Bits16,
.mono = 0,
.stop = 1,
.reset = 0,
.ws_sel = 1,
.ws_halfperiod = 0x0f,
.mute = 1,
},
.txrate = i2s::MCLKRate {
.x_divider = 0,
.y_divider = 0,
},
.txbitrate = i2s::BitRate {
.bitrate = 0,
},
.txmode = i2s::Mode {
.clksel = i2s::ClockSelect::FractionalDivider,
.four_pin = 0,
.mclk_out_en = 1,
},
.sck_in_sel = 1,
};
constexpr i2s::ConfigDMA i2s0_config_dma {
.dma1 = i2s::DMA {
.rx_enable = 1,
.tx_enable = 0,
.rx_depth = 4,
.tx_depth = 0,
},
.dma2 = i2s::DMA {
.rx_enable = 0,
.tx_enable = 1,
.rx_depth = 0,
.tx_depth = 4,
},
};
static audio::Codec* audio_codec = nullptr;
} /* namespace */
namespace output {
void start() {
i2s::i2s0::tx_start();
unmute();
}
void stop() {
mute();
i2s::i2s0::tx_stop();
}
void mute() {
i2s::i2s0::tx_mute();
audio_codec->headphone_disable();
}
void unmute() {
i2s::i2s0::tx_unmute();
audio_codec->headphone_enable();
}
void speaker_mute() {
i2s::i2s0::tx_mute();
audio_codec->speaker_disable();
}
void speaker_unmute() {
i2s::i2s0::tx_unmute();
audio_codec->speaker_enable();
}
} /* namespace output */
namespace input {
void start() {
audio_codec->microphone_enable();
i2s::i2s0::rx_start();
}
void stop() {
i2s::i2s0::rx_stop();
audio_codec->microphone_disable();
}
} /* namespace input */
namespace headphone {
volume_range_t volume_range() {
return audio_codec->headphone_gain_range();
}
void set_volume(const volume_t volume) {
audio_codec->set_headphone_volume(volume);
}
} /* namespace headphone */
namespace debug {
size_t reg_count() {
return audio_codec->reg_count();
}
uint32_t reg_read(const size_t register_number) {
return audio_codec->reg_read(register_number);
}
std::string codec_name() {
return audio_codec->name();
}
size_t reg_bits() {
return audio_codec->reg_bits();
}
} /* namespace debug */
void init(audio::Codec* const codec) {
clock_manager.start_audio_pll();
// Configure I2S before activating codec interface.
i2s::i2s0::configure(
i2s0_config_tx_master_base_clk,
i2s0_config_rx_four_wire,
i2s0_config_dma
);
audio_codec = codec;
audio_codec->init();
// Set pin mode, since it's likely GPIO (as left after CPLD JTAG interactions).
portapack::pin_i2s0_rx_sda.mode(3);
}
void shutdown() {
audio_codec->reset();
input::stop();
output::stop();
i2s::i2s0::shutdown();
clock_manager.stop_audio_pll();
}
void set_rate(const Rate rate) {
clock_manager.set_base_audio_clock_divider(toUType(rate));
}
} /* namespace audio */