mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-27 00:09:36 -05:00
175 lines
3.2 KiB
C++
175 lines
3.2 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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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 2, or (at your option)
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* any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "audio.hpp"
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#include "portapack.hpp"
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using portapack::i2c0;
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using portapack::clock_manager;
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#include "wm8731.hpp"
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using wolfson::wm8731::WM8731;
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#include "i2s.hpp"
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using namespace lpc43xx;
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namespace audio {
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namespace {
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constexpr i2s::ConfigTX i2s0_config_tx {
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.dao = i2s::DAO {
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.wordwidth = i2s::WordWidth::Bits16,
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.mono = 0,
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.stop = 1,
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.reset = 0,
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.ws_sel = 0,
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.ws_halfperiod = 0x0f,
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.mute = 1,
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},
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.txrate = i2s::MCLKRate {
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.x_divider = 0,
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.y_divider = 0,
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},
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.txbitrate = i2s::BitRate {
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.bitrate = 7,
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},
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.txmode = i2s::Mode {
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.clksel = i2s::ClockSelect::BaseAudioClkOrExternalMCLK,
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.four_pin = 0,
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.mclk_out_en = 1,
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},
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};
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constexpr i2s::ConfigRX i2s0_config_rx {
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.dai = i2s::DAI {
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.wordwidth = i2s::WordWidth::Bits16,
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.mono = 0,
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.stop = 1,
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.reset = 0,
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.ws_sel = 1,
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.ws_halfperiod = 0x0f,
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},
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.rxrate = i2s::MCLKRate {
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.x_divider = 0,
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.y_divider = 0,
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},
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.rxbitrate = i2s::BitRate {
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.bitrate = 7,
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},
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.rxmode = i2s::Mode {
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.clksel = i2s::ClockSelect::BaseAudioClkOrExternalMCLK,
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.four_pin = 1,
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.mclk_out_en = 0,
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},
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};
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constexpr i2s::ConfigDMA i2s0_config_dma {
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.dma1 = i2s::DMA {
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.rx_enable = 1,
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.tx_enable = 0,
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.rx_depth = 4,
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.tx_depth = 0,
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},
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.dma2 = i2s::DMA {
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.rx_enable = 0,
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.tx_enable = 1,
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.rx_depth = 0,
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.tx_depth = 4,
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},
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};
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constexpr uint8_t wm8731_i2c_address = 0x1a;
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WM8731 audio_codec { i2c0, wm8731_i2c_address };
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} /* namespace */
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namespace output {
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void start() {
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i2s::i2s0::tx_start();
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unmute();
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}
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void stop() {
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mute();
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i2s::i2s0::tx_stop();
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}
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void mute() {
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i2s::i2s0::tx_mute();
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audio_codec.headphone_mute();
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}
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void unmute() {
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i2s::i2s0::tx_unmute();
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}
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} /* namespace output */
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namespace headphone {
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volume_range_t volume_range() {
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return wolfson::wm8731::headphone_gain_range;
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}
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void set_volume(const volume_t volume) {
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audio_codec.set_headphone_volume(volume);
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}
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} /* namespace headphone */
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namespace debug {
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int reg_count() {
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return wolfson::wm8731::reg_count;
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}
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uint16_t reg_read(const int register_number) {
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return audio_codec.read(register_number);
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}
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} /* namespace debug */
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void init() {
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clock_manager.start_audio_pll();
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audio_codec.init();
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i2s::i2s0::configure(
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i2s0_config_tx,
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i2s0_config_rx,
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i2s0_config_dma
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);
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}
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void shutdown() {
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audio_codec.reset();
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output::stop();
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}
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void set_rate(const Rate rate) {
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clock_manager.set_base_audio_clock_divider(toUType(rate));
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}
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} /* namespace audio */
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