mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 19:54:39 +00:00
175 lines
3.2 KiB
C++
175 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* 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::i2c0;
|
|
using portapack::clock_manager;
|
|
|
|
#include "wm8731.hpp"
|
|
using wolfson::wm8731::WM8731;
|
|
|
|
#include "i2s.hpp"
|
|
using namespace lpc43xx;
|
|
|
|
namespace audio {
|
|
|
|
namespace {
|
|
|
|
constexpr i2s::ConfigTX i2s0_config_tx {
|
|
.dao = i2s::DAO {
|
|
.wordwidth = i2s::WordWidth::Bits16,
|
|
.mono = 0,
|
|
.stop = 1,
|
|
.reset = 0,
|
|
.ws_sel = 0,
|
|
.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,
|
|
},
|
|
};
|
|
|
|
constexpr i2s::ConfigRX i2s0_config_rx {
|
|
.dai = i2s::DAI {
|
|
.wordwidth = i2s::WordWidth::Bits16,
|
|
.mono = 0,
|
|
.stop = 1,
|
|
.reset = 0,
|
|
.ws_sel = 1,
|
|
.ws_halfperiod = 0x0f,
|
|
},
|
|
.rxrate = i2s::MCLKRate {
|
|
.x_divider = 0,
|
|
.y_divider = 0,
|
|
},
|
|
.rxbitrate = i2s::BitRate {
|
|
.bitrate = 7,
|
|
},
|
|
.rxmode = i2s::Mode {
|
|
.clksel = i2s::ClockSelect::BaseAudioClkOrExternalMCLK,
|
|
.four_pin = 1,
|
|
.mclk_out_en = 0,
|
|
},
|
|
};
|
|
|
|
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,
|
|
},
|
|
};
|
|
|
|
constexpr uint8_t wm8731_i2c_address = 0x1a;
|
|
|
|
WM8731 audio_codec { i2c0, wm8731_i2c_address };
|
|
|
|
} /* 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_mute();
|
|
}
|
|
|
|
void unmute() {
|
|
i2s::i2s0::tx_unmute();
|
|
}
|
|
|
|
} /* namespace output */
|
|
|
|
namespace headphone {
|
|
|
|
volume_range_t volume_range() {
|
|
return wolfson::wm8731::headphone_gain_range;
|
|
}
|
|
|
|
void set_volume(const volume_t volume) {
|
|
audio_codec.set_headphone_volume(volume);
|
|
}
|
|
|
|
} /* namespace headphone */
|
|
|
|
namespace debug {
|
|
|
|
int reg_count() {
|
|
return wolfson::wm8731::reg_count;
|
|
}
|
|
|
|
uint16_t reg_read(const int register_number) {
|
|
return audio_codec.read(register_number);
|
|
}
|
|
|
|
} /* namespace debug */
|
|
|
|
void init() {
|
|
clock_manager.start_audio_pll();
|
|
audio_codec.init();
|
|
|
|
i2s::i2s0::configure(
|
|
i2s0_config_tx,
|
|
i2s0_config_rx,
|
|
i2s0_config_dma
|
|
);
|
|
}
|
|
|
|
void shutdown() {
|
|
audio_codec.reset();
|
|
output::stop();
|
|
}
|
|
|
|
void set_rate(const Rate rate) {
|
|
clock_manager.set_base_audio_clock_divider(toUType(rate));
|
|
}
|
|
|
|
} /* namespace audio */
|