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616 lines
39 KiB
C++
616 lines
39 KiB
C++
/*
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* Copyright (C) 2017 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 "ak4951.hpp"
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#include "portapack_io.hpp"
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using namespace portapack;
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#include <ch.h>
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namespace asahi_kasei {
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namespace ak4951 {
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void AK4951::configure_digital_interface_i2s() {
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// Configure for external slave mode.
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map.r.mode_control_1.DIF = 0b11; // I2S compatible
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map.r.mode_control_1.BCKO = 0; // BICK = 32fs
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update(Register::ModeControl1);
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map.r.mode_control_2.CM = 0b00; // MCKI = 256fs
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map.r.mode_control_2.FS = 0b1011; // fs = 48kHz
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update(Register::ModeControl2);
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}
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void AK4951::configure_digital_interface_external_slave() {
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map.r.power_management_2.MS = 0; // Slave mode
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map.r.power_management_2.PMPLL = 0; // EXT mode
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update(Register::PowerManagement2);
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}
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void AK4951::configure_digital_interface_external_master() {
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map.r.power_management_2.MS = 1; // Master mode
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map.r.power_management_2.PMPLL = 0; // EXT mode
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update(Register::PowerManagement2);
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}
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void AK4951::init() {
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reset();
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// Write dummy address to "release" the reset.
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write(0x00, 0x00);
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configure_digital_interface_i2s();
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configure_digital_interface_external_slave();
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map.r.power_management_1.PMVCM = 1;
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update(Register::PowerManagement1);
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// Headphone output is hi-Z when not active, reduces crosstalk from speaker output.
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map.r.beep_control.HPZ = 1;
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update(Register::BeepControl);
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// Pause for VCOM and REGFIL pins to stabilize.
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chThdSleepMilliseconds(2);
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headphone_mute();
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// SPK-Amp gain setting: SPKG1-0 bits = “00” → “01”
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map.r.signal_select_2.SPKG = 0b01;
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update(Register::SignalSelect2);
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map.r.signal_select_3.MONO = 0b00;
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update(Register::SignalSelect3);
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map.r.digital_filter_mode.PFSDO = 0; // ADC bypass digital filter block.
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map.r.digital_filter_mode.ADCPF = 1; // ADC output
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map.r.digital_filter_mode.PFDAC = 0b00; // SDTI
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update(Register::DigitalFilterMode);
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// Set up FRN, FRATT and ADRST1-0 bits (Addr = 09H)
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// map.r.timer_select.FRN = 0;
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// map.r.timer_select.FRATT = 0;
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// map.r.timer_select.ADRST = 0b00;
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// update(Register::TimerSelect);
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// Set up ALC mode (Addr = 0AH, 0BH)
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// map.r.alc_timer_select. = ;
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// update(Register::ALCTimerSelect);
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// map.r.alc_mode_control_1. = ;
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// update(Register::ALCModeControl1);
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// Set up REF value of ALC (Addr = 0CH)
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// map.r.alc_mode_control_2. = ;
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// update(Register::ALCModeControl2);
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// Set up IVOL value of ALC operation start (Addr = 0DH)
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// map.r.l_ch_input_volume_control. = ;
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// update(Register::LchInputVolumeControl);
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// map.r.r_ch_input_volume_control. = ;
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// update(Register::RchInputVolumeControl);
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// Set up the output digital volume. (Addr = 13H)
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// set_headphone_volume(...);
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// Set up Programmable Filter Path: PFDAC1-0 bits=“01”, PFSDO=ADCPF bits=“0” (Addr = 1DH)
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// map.r.digital_filter_mode.PFDAC = 0b01;
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// update(Register::DigitalFilterMode);
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}
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bool AK4951::detected() {
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return reset();
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}
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bool AK4951::reset() {
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io.audio_reset_state(true);
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// PDN# pulse must be >200ns
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chThdSleepMicroseconds(10);
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io.audio_reset_state(false);
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return true;
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}
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void AK4951::set_digtal_volume_control(const reg_t value) {
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map.r.l_ch_digital_volume_control.DV = value;
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update(Register::LchDigitalVolumeControl);
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}
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void AK4951::set_headphone_volume(const volume_t volume) {
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const auto normalized = headphone_gain_range().normalize(volume);
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auto n = normalized.centibel() / 5;
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set_digtal_volume_control(0xcb - n);
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}
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void AK4951::headphone_mute() {
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set_digtal_volume_control(0xff);
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}
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void AK4951::set_dac_power(const bool enable) {
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map.r.power_management_1.PMDAC = enable;
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update(Register::PowerManagement1);
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}
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void AK4951::set_headphone_power(const bool enable) {
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map.r.power_management_2.PMHPL = map.r.power_management_2.PMHPR = enable;
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update(Register::PowerManagement2);
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}
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void AK4951::set_speaker_power(const bool enable) {
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map.r.power_management_2.PMSL = enable;
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update(Register::PowerManagement2);
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}
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void AK4951::select_line_out(const LineOutSelect value) {
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map.r.power_management_2.LOSEL = (value == LineOutSelect::Line) ? 1 : 0;
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update(Register::PowerManagement2);
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}
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void AK4951::headphone_enable() {
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set_dac_power(true);
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set_headphone_power(true);
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// Wait for headphone amplifier charge pump power-up.
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chThdSleepMilliseconds(35);
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}
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void AK4951::headphone_disable() {
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set_headphone_power(false);
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// Don't power off DAC unless Speaker is disabled also
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if (map.r.power_management_2.PMSL == 0) {
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set_dac_power(false);
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}
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}
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void AK4951::speaker_enable() {
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// Set up the path of DAC → SPK-Amp: DACS bit = “0” → “1”
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map.r.signal_select_1.DACS = 1;
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update(Register::SignalSelect1);
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// Enter Speaker-Amp Output Mode: LOSEL bit = “0”
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select_line_out(LineOutSelect::Speaker);
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// Power up DAC, Programmable Filter and Speaker-Amp: PMDAC=PMPFIL=PMSL bits=“0”→“1”
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set_dac_power(true);
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// map.r.power_management_1.PMPFIL = 1;
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// update(Register::PowerManagement1);
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set_speaker_power(true);
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// Time from PMSL=1 to SLPSN=1.
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chThdSleepMilliseconds(1);
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// Exit the power-save mode of Speaker-Amp: SLPSN bit = “0” → “1”
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map.r.signal_select_1.SLPSN = 1;
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update(Register::SignalSelect1);
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}
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void AK4951::speaker_disable() {
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// Enter Speaker-Amp Power Save Mode: SLPSN bit = “1” → “0”
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map.r.signal_select_1.SLPSN = 0;
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update(Register::SignalSelect1);
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// Disable the path of DAC → SPK-Amp: DACS bit = “1” → “0”
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map.r.signal_select_1.DACS = 0;
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update(Register::SignalSelect1);
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// Power down DAC, Programmable Filter and speaker: PMDAC=PMPFIL=PMSL bits= “1”→“0”
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// Exception: Don't power off DAC unless Headphones are disabled too
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if (map.r.power_management_2.PMHPL == 0) {
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set_dac_power(false);
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}
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// map.r.power_management_1.PMPFIL = 0;
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// update(Register::PowerManagement1);
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set_speaker_power(false);
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}
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void AK4951::microphone_enable(int8_t alc_mode, bool mic_to_HP_enabled) {
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// alc_mode =0 = (OFF =same as original code = NOT using AK4951 Programmable digital filter block),
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// alc_mode >1 (with DIGITAL FILTER BLOCK , example : 1:(+12dB) , 2:(+9dB)", 3:(+6dB), ...)
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// map.r.digital_mic.DMIC = 0; // originally commented code
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// update(Register::DigitalMic); // originally commented code
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uint_fast8_t mgain = 0b0111; // Pre-amp mic (Original code, =0b0111 (+21dB's=7x3dBs),(Max is NOT 0b1111!, it is 0b1010=+30dBs=10x3dBs)
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map.r.signal_select_2.INL = 0b01; // Lch input signal = LIN2 , our ext. MONO MIC is connected here LIN2 in Portapack.
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map.r.signal_select_2.INR = 0b01; // Rch input signal = RIN2 , Not used ,not connected ,but no problem.
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map.r.signal_select_2.MICL = 0; // MPWR = 2.4V (it has two possible settings , 2.4V or 2.0V) , (majority smarthphones around 2V , range 1V-5V)
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update(Register::SignalSelect2);
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// ------Common code part, = original setting conditions, it is fine for all user-GUI alc_modes: OFF , and ALC modes .*/
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map.r.digital_filter_select_1.HPFAD = 1; // HPF1 ON (after ADC);page 40 datasheet, HPFAD bit controls the ON/OFF of the HPF1 (HPF ON is recommended).
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map.r.digital_filter_select_1.HPFC = 0b11; // HPF Cut off frequency of high pass filter from 236.8 Hz @fs=48k ("00":3.7Hz, "01":14,8Hz, "10":118,4Hz)
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update(Register::DigitalFilterSelect1);
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// map.r.r_ch_mic_gain_setting.MGR = 0x80; // Microphone sensitivity correction = 0dB., (not used by now , original code cond.)
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// update(Register::RchMicGainSetting); // (those two lines , not activated, same as original)
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// pre-load 4 byes LPF coefficicients (.lpf_coefficient_0,1,2,3), FSA 14..0, FSB 14..0 , (fcut initial 6kHz, fs 48Khz).
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// it will be default pre-loading coeff. for al ALC modes, LPF bit is activated down, for all ALC digital modes.
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map.r.lpf_coefficient_0.l = 0x5F; // Pre-loading here LPF 6kHz, 1st Order from digital Block , Fc=6000 Hz, fs = 48khz
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map.r.lpf_coefficient_1.h = 0x09; // LPF bit is activated down, for all ALC digital modes.
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map.r.lpf_coefficient_2.l = 0xBF; // Writting reg to AK4951, with "update", following instructions.
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map.r.lpf_coefficient_3.h = 0x32;
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update(Register::LPFCoefficient0); // Writing pre-loaded 4 bytes LPF CoefFiecients 14 bits (FSA13..0, FSB13..0
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update(Register::LPFCoefficient1); // In this case , LPF 6KHz , when we activate the LPF block.
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update(Register::LPFCoefficient2);
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update(Register::LPFCoefficient3);
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// Reset , setting OFF all 5 x Digital Equalizer filters
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map.r.digital_filter_select_3.EQ1 = 0; // EQ1 Coeffic Setting , (0: Disable-default, audio data passes EQ1 block by 0dB gain). When EQ1="1”, the settings of E1A15-0, E1B15-0 and E1C15-0 bits are enabled
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map.r.digital_filter_select_3.EQ2 = 0; // EQ2 Coeffic Setting , (0: Disable-default, audio data passes EQ2 block by 0dB gain). When EQ2="1”, the settings of E2A15-0, E2B15-0 and E2C15-0 bits are enabled
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map.r.digital_filter_select_3.EQ3 = 0; // EQ3 Coeffic Setting , (0: Disable-default, audio data passes EQ3 block by 0dB gain). When EQ3="1”, the settings of E3A15-0, E3B15-0 and E3C15-0 bits are enabled
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map.r.digital_filter_select_3.EQ4 = 0; // EQ4 Coeffic Setting , (0: Disable-default, audio data passes EQ4 block by 0dB gain). When EQ4="1”, the settings of E4A15-0, E4B15-0 and E4C15-0 bits are enabled
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map.r.digital_filter_select_3.EQ5 = 0; // EQ5 Coeffic Setting , (0: Disable-default, audio data passes EQ5 block by 0dB gain). When EQ5="1”, the settings of E5A15-0, E5B15-0 and E5C15-0 bits are enabled
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update(Register::DigitalFilterSelect3); // A,B,C EQ1 Coefficients are already pre-loaded in ak4951.hpp
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if (alc_mode == 0) { // Programmable Digital Filter OFF, same as original condition., no Digital ALC, nor Wind Noise Filter, LPF , EQ
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map.r.digital_filter_select_2.LPF = 0; // LPF-Block, Coeffic Setting Enable (OFF-Default), When LPF bit is “0”, audio data passes the LPF block by 0dB gain.
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update(Register::DigitalFilterSelect2);
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// Pre-loading AUDIO PATH with all DIGITAL BLOCK by pased, see, audio path block diagramm AK4951 datasheet + Table Playback mode -Recording mode.
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// Digital filter block PATH is BY PASSED (we can swith off DIG. BLOCK power , PMPFIL=0) .The Path in Recording Mode 2 & Playback Mode 2 (NO DIG FILTER BLOCK AT ALL, not for MIC recording, nor for Playback)
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map.r.digital_filter_mode.ADCPF = 1; // ADCPF bit swith ("0" Mic after ADC Output connected (recording mode) to the DIGITAL FILTER BLOCK. ("1" Playback mode)
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map.r.digital_filter_mode.PFSDO = 0; // ADC bit switch ("0" : 1st order HPF) connectedto the Output. By bass DIGITAL block .
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map.r.digital_filter_mode.PFDAC = 0b00; // (Input selector for DAC (not used in MIC), SDTI= Audio Serial Data Input Pin)
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update(Register::DigitalFilterMode); // Writing the Audio Path : NO DIGITAL BLOCK or DIG BLOCK FOR MIC , Audio mode path : Playback mode /-Recording mode.
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map.r.power_management_1.PMADL = 1; // ADC Lch = Lch input signal. Mic Amp Lch and ADC Lch Power Management
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map.r.power_management_1.PMADR = 0; // ADC Rch = Rch input signal. Mic Amp Rch and ADC Rch Power Management. (PMADL=1, PMADR=0) means MONO MIC input connected to Left pin.
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map.r.power_management_1.PMPFIL = 0; // Pre-loading , Programmable Dig. filter OFF ,filter unused, routed around.(original value = 0 )
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update(Register::PowerManagement1); // Activating the Power management of the used blocks . (Mic ADC always + Dig Block filter , when used )
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// 1059/fs, 22ms @ 48kHz
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chThdSleepMilliseconds(22);
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} else { // ( alc_mode !=0)
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switch (alc_mode) { // Pre-loading register values depending on user-GUI selection (they will be sended below, with "update(Register_name::xxx )".
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case 1: // ALC-> on, (+12dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
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map.r.alc_mode_control_2.REF = 0xC0; // REF7-0 bits,max gain at ALC recovery operation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, C0H=+12dBs)
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map.r.l_ch_input_volume_control.IV = 0xC0; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
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map.r.r_ch_input_volume_control.IV = 0xC0; // Right Input Dig Vol Setting, same comment as above , The value of IVOL should be <= than REF’s
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// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
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// LPF bit is activated down, for all ALC digital modes.
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break;
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case 2: // ALC-> on, (+09dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
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map.r.alc_mode_control_2.REF = 0xB8; // REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, B8H= +9dBs)
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map.r.l_ch_input_volume_control.IV = 0xB8; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
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map.r.r_ch_input_volume_control.IV = 0xB8; // Right Input Dig Vol Setting, same comment as above , The value of IVOL should be <= than REF’s
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// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
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// LPF bit is activated down, for all ALC digital modes.
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break;
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case 3: // ALC-> on, (+06dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
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map.r.alc_mode_control_2.REF = 0xB0; // 0xB8 , REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, B0H= +6dBs)
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map.r.l_ch_input_volume_control.IV = 0xB0; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
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map.r.r_ch_input_volume_control.IV = 0xB0; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
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// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
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// LPF bit is activated down, for all ALC digital modes.
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break;
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case 4: // ALC-> on, (+03dB's) Auto Vol max + Wind Noise cancel + Pre-amp Mic (+21dB=original)
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// + EQ boosting ~<2kHz (f0:1,1k, fb:1,7K, k=1,8) && + LPF 3,5k
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map.r.alc_mode_control_2.REF = 0xA8; // 0xA8 , REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, A8H= +3dBs)
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map.r.l_ch_input_volume_control.IV = 0xA8; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
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map.r.r_ch_input_volume_control.IV = 0xA8; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
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// The EQn (n=1, 2, 3, 4 or 5) coefficient must be set when EQn bit = “0” or PMPFIL bit = “0”.
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map.r.digital_filter_select_3.EQ1 = 1; // EQ1 Coeffic Setting , (0: Disable-default, audio data passes EQ1 block by 0dB gain). When EQ1="1”, the settings of E1A15-0, E1B15-0 and E1C15-0 bits are enabled
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update(Register::DigitalFilterSelect3); // A,B,C EQ1 Coefficients are already pre-loaded in ak4951.hpp
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map.r.lpf_coefficient_0.l = 0x0D; // Pre-loading here LPF 3,5k , 1st Order from digital Block , Fc=3.500 Hz, fs = 48khz
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map.r.lpf_coefficient_1.h = 0x06; // LPF bit is activated down, for all ALC digital modes.
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map.r.lpf_coefficient_2.l = 0x1A; // Writting reg to AK4951 , down with update....
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map.r.lpf_coefficient_3.h = 0x2C;
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// LPF bit is activated down, for all ALC digital modes.
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break;
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case 5: // ALC-> on, (+03dB's) Auto Vol max + Wind Noise cancel + Pre-amp Mic (+21dB=original)
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// + EQ boosting ~<3kHz (f0~1k4,fb~2,4k,k=1,8) && LPF 4kHz
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map.r.alc_mode_control_2.REF = 0xA8; // 0xA0 , REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, A8H= +3dBs)
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map.r.l_ch_input_volume_control.IV = 0xA8; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
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map.r.r_ch_input_volume_control.IV = 0xA8; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
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|
||
map.r.digital_filter_select_3.EQ2 = 1; // EQ2 Coeffic Setting , (0: Disable-default, audio data passes EQ2 block by 0dB gain). When EQ2="1”, the settings of E2A15-0, E2B15-0 and E2C15-0 bits are enabled
|
||
update(Register::DigitalFilterSelect3);
|
||
|
||
map.r.lpf_coefficient_0.l = 0xC3; // Pre-loading here LPF 4k , 1st Order from digital Block , Fc=4000 Hz, fs = 48khz
|
||
map.r.lpf_coefficient_1.h = 0x06; // LPF bit is activated down, for all ALC digital modes.
|
||
map.r.lpf_coefficient_2.l = 0x86; // Writting reg to AK4951 , down with update....
|
||
map.r.lpf_coefficient_3.h = 0x2D;
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 6: // ALC-> on, (+03dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
|
||
map.r.alc_mode_control_2.REF = 0xA8; // REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, A0H= 0dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0xA8; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0xA8; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 7: // ALC-> on, (+00dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
|
||
map.r.alc_mode_control_2.REF = 0xA0; // REF7-0 bits,max gain at ALC recoveryoperation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, A0H= 0dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0xA0; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0xA0; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 8: // ALC-> on, (-03dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
|
||
map.r.alc_mode_control_2.REF = 0x98; // REF7-0 bits,max gain at ALC recovery operation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, 98H=-03dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0x98; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0x98; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 9: // ALC-> on, (-06dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz + Pre-amp Mic (+21dB=original)
|
||
map.r.alc_mode_control_2.REF = 0x90; // REF7-0 bits,max gain at ALC recovery operation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, 90H=-06dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0x90; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0x90; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 10: // ALC-> on, (-09dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz - Pre-amp MIC -3dB (18dB's)
|
||
// Reduce also Pre-amp Mic -3dB's (+18dB's)
|
||
mgain = 0b0110; // Pre-amp mic Mic Gain Pre-amp (+18dB), Original=0b0111 (+21dB's =7x3dBs),
|
||
|
||
map.r.alc_mode_control_2.REF = 0x88; // REF7-0 bits,max gain at ALC recovery operation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, 88H=-09dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0x88; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0x88; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
|
||
case 11: // ALC-> on, (-12dB's) Auto Vol max + Wind Noise cancel + LPF 6kHz - Pre-amp MIC -6dB (15dB's)
|
||
// Reduce also Pre-amp Mic -6dB's (+15dB's)
|
||
mgain = 0b0101; // Pre-amp mic Mic Gain Pre-amp (+15dB), (Original=0b0111 (+21dB's= 7x3dBs),
|
||
|
||
map.r.alc_mode_control_2.REF = 0x80; // REF7-0 bits,max gain at ALC recovery operation,(FFH +36dBs , D0H +18dBs, A0H 0dBs, 80H=-12dBs)
|
||
map.r.l_ch_input_volume_control.IV = 0x80; // Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
map.r.r_ch_input_volume_control.IV = 0x80; // Right Input Dig Vol Setting, same comment as above , Then value of IVOL should be <= than REF’s
|
||
|
||
// Already Pre-loaded, "map.r.lpf_coefficient", 6Khz - LPF 1st Order from digital Block,Fc=6000Hz,fs = 48khz
|
||
// LPF bit is activated down, for all ALC digital modes.
|
||
break;
|
||
}
|
||
|
||
//-------------------------------DIGITAL ALC (Automatic Level Control ) --- --------
|
||
map.r.alc_mode_control_1.ALC = 0; // LMTH2-0, WTM1-0, RGAIN2-0, REF7-0, RFST1-0, EQFC1-0, FRATT, FRN and ALCEQN bits (needs to be set up with ALC disable = 0)
|
||
update(Register::ALCModeControl1);
|
||
|
||
map.r.timer_select.FRN = 0; // (FRN= 0 Fast Recovery mode , enable )
|
||
map.r.timer_select.FRATT = 0; // Fast Recovery Ref. Volume Atten. Amount -0,00106dB's, timing 4/fs (default)
|
||
map.r.timer_select.ADRST = 0b00; // initial offset ADC cycles , 22ms @fs=48Khz.
|
||
update(Register::TimerSelect);
|
||
|
||
map.r.alc_timer_select.RFST = 0b00; // RFST1-0: ALC Fast Recovery Speed Default: “00” (0.0032dB)
|
||
map.r.alc_timer_select.WTM = 0b00; // ALC Recovery Operation Waiting Period 128/fs = 2,7 mseg (min=default)
|
||
map.r.alc_timer_select.EQFC = 0b10; // Selecting default, fs 48Khz , ALCEQ: First order zero pole high pass filter fc2=100Hz, fc1=150Hz
|
||
map.r.alc_timer_select.IVTM = 0; // IVTM bit set the vol transition time ,236/fs = 4,9msecs (min) (default was 19,7msegs.)
|
||
update(Register::ALCTimerSelect);
|
||
|
||
map.r.alc_mode_control_1.LMTH10 = 0b11; // ALC Limiter Detec Level/ Recovery Counter Reset; lower 2 bits (Ob111=-8,4dbs), (default 0b000=-2,5dBs)
|
||
map.r.alc_mode_control_1.RGAIN = 0b000; // ALC Recovery Gain Step, max step , max speed. Default: “000” (0.00424dB)
|
||
map.r.alc_mode_control_1.ALC = 1; // ALC Enable . (we are now, NOT in MANUAL volume mode, only becomes manual when (ALC=“0” while ADCPF=“1”. )
|
||
map.r.alc_mode_control_1.LMTH2 = 1; // ALC Limiter Detection Level/ Recovery Counter Reset Level,Upper bit,default 0b000
|
||
map.r.alc_mode_control_1.ALCEQN = 1; // ALC EQ Off =1 not used by now, 0: ALC EQ On (default)
|
||
update(Register::ALCModeControl1);
|
||
|
||
// map.r.alc_mode_control_2.REF = 0x??; // Pre-loaded in top part. Maximum gain at ALC recovery operation,.(FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
update(Register::ALCModeControl2);
|
||
|
||
// map.r.l_ch_input_volume_control.IV = 0x??; // Pre-loaded in top part. Left, Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
update(Register::LchInputVolumeControl);
|
||
|
||
// map.r.r_ch_input_volume_control.IV = 0x??; // Pre-loaded in top part. Right,Input Digital Volume Setting, (FFH +36dBs , D0H +18dBs, A0H 0dBs, 70H=-18dBs)
|
||
update(Register::RchInputVolumeControl);
|
||
|
||
//---------------Switch ON, Digital Automatic Wind Noise Filter reduction -------------------
|
||
// Difficult to realise that Dynamic HPF Wind noise filter benefit, maybe because we have another fixed HPF 236.8 Hz .
|
||
// Anyway , we propose to activate it , with default setting conditions.
|
||
map.r.power_management_1.PMPFIL = 0; // (*1) To programm SENC, STG , we need PMPFIL = 0 . (but this disconnect Digital block power supply.
|
||
update(Register::PowerManagement1); // Updated PMPFIL to 0 . (*1)
|
||
|
||
map.r.auto_hpf_control.STG = 0b00; // (00=LOW ATTENUATION Level), lets put 11 (HIGH ATTENUATION Level) (default 00)
|
||
map.r.auto_hpf_control.SENC = 0b011; // (000=LOW sensitivity detection)… 111((MAX sensitivity detection) (default 011)
|
||
map.r.auto_hpf_control.AHPF = 1; // Autom. Wind noise filter ON (AHPF bit=“1”).It atten. wind noise when detecting ,and adjusts the atten. level dynamically.
|
||
update(Register::AutoHPFControl);
|
||
|
||
// We are in Digital Block ON , (Wind Noise Filter+ALC+LPF+EQ),==> needs at the end , PMPFIL=1 , Program. Dig.filter ON
|
||
// map.r.power_management_1.PMPFIL = 1; // that instruction is at the end , we can skp pre-loading Programmable Dig. filter ON (*1)
|
||
//---------------------------------------------------------------------
|
||
|
||
// Writing AUDIO PATH diagramm, Changing Audio mode path : Playback mode1 /-Recording mode2. (Figure 37 AK4951 datasheet, Table 27. Recording Playback Mode)
|
||
// When changing those modes, PMPFIL bit must be “0”, it is OK (*1)
|
||
map.r.digital_filter_mode.ADCPF = 1; // ADCPF bit swith ("0" Mic after ADC Output connected (recording mode) to the DIGITAL FILTER BLOCK. ("1" Playback mode)
|
||
map.r.digital_filter_mode.PFSDO = 1; // ADC (+ 1st order HPF) Output
|
||
map.r.digital_filter_mode.PFDAC = 0b00; // (Input selector for DAC (initially not used in MIC), SDTI= Audio Serial Data Input Pin)
|
||
update(Register::DigitalFilterMode); // Writing the Audio Path : NO DIGITAL BLOCK or DIG BLOCK FOR MIC , Audio mode path : Playback mode /-Recording mode.
|
||
|
||
// The EQn (n=1, 2, 3, 4 or 5) coefficient must be set when EQn bit = “0” or PMPFIL bit = “0”., but we are already (*1)
|
||
// map.r.power_management_1.PMPFIL = 0; // In the previous Wind Noise Filter , we already set up PPFIL = 0
|
||
// update(Register::PowerManagement1); // Activating the Power management of the used blocks . (Mic ADC always + Dig Block filter , when used )
|
||
|
||
// ... Set EQ & LPF coefficients ---------------------------------
|
||
|
||
// writting to the IC ak4951 reg. settings defined in Ak4951.hpp , the 30 bytes , EQ coefficient = 5 (EQ1,2,3,4,5) x 3 (A,B,C coefficients) x 2 bytes (16 bits)
|
||
update(Register::E1Coefficient0); // we could pre-load here,ex ,"map.r.e1_coefficient_0.l = 0x50;" , EQ1 Coefficient A : A7...A0, but already done in ak4951.hpp
|
||
update(Register::E1Coefficient1); // we could pre-load here,ex ,"map.r.e1_coefficient_1.h = 0xFE;" , EQ1 Coefficient A : A15..A8, " "
|
||
update(Register::E1Coefficient2); // we could pre-load here,ex ,"map.r.e1_coefficient_2.l = 0x29;" , EQ1 Coefficient B : B7...B0, " "
|
||
update(Register::E1Coefficient3); // we could pre-load here,ex ,"map.r.e1_coefficient_3.h = 0xC5;" , EQ1 Coefficient B : B15..B8, " "
|
||
update(Register::E1Coefficient4); // we could pre-load here,ex ,"map.r.e1_coefficient_4.l = 0xA0;" , EQ1 Coefficient C : C7...C0, " "
|
||
update(Register::E1Coefficient5); // we could pre-load here,ex ,"map.r.e1_coefficient_5.h = 0x1C;" , EQ1 Coefficient C : C15..C8, " "
|
||
|
||
update(Register::E2Coefficient0); // writing pre-loaded EQ2 coefficcients
|
||
update(Register::E2Coefficient1);
|
||
update(Register::E2Coefficient2);
|
||
update(Register::E2Coefficient3);
|
||
update(Register::E2Coefficient4);
|
||
update(Register::E2Coefficient5);
|
||
|
||
// Already pre-loaded LPF coefficients to 6k, 3,5k or 4k ,(LPF 6Khz all digital alc modes top , except when 3k5 , 4k)
|
||
update(Register::LPFCoefficient0); // Writing pre-loaded 4 bytes LPF CoefFiecients 14 bits (FSA13..0, FSB13..0
|
||
update(Register::LPFCoefficient1);
|
||
update(Register::LPFCoefficient2);
|
||
update(Register::LPFCoefficient3);
|
||
|
||
// Activating LPF block , (and re-configuring the rest of bits of the same register)
|
||
map.r.digital_filter_select_2.HPF = 0; // HPF2-Block, Coeffic Setting Enable (OFF-Default), When HPF bit is “0”, audio data passes the HPF2 block by is 0dB gain.
|
||
map.r.digital_filter_select_2.LPF = 1; // LPF-Block, Coeffic Setting Enable (OFF-Default), When LPF bit is “0”, audio data passes the LPF block by 0dB gain.
|
||
map.r.digital_filter_select_2.FIL3 = 0; // Stereo_Emphasis_Filter-Block,(OFF-Default) Coefficient Setting Enable , OFF , Disable.
|
||
map.r.digital_filter_select_2.EQ0 = 0; // Gain Compensation-Block, (OFF-Default) Coeffic Setting Enable, When EQ0 bit = “0” audio data passes the EQ0 block by 0dB gain.
|
||
map.r.digital_filter_select_2.GN = 0b00; // Gain Setting of the Gain Compensation Block Default: “00”-Default (0dB)
|
||
update(Register::DigitalFilterSelect2);
|
||
|
||
// Acitivating digital block , power supply
|
||
map.r.power_management_1.PMADL = 1; // ADC Lch = Lch input signal. Mic Amp Lch and ADC Lch Power Management
|
||
map.r.power_management_1.PMADR = 0; // ADC Rch = Rch input signal. Mic Amp Rch and ADC Rch Power Management. (PMADL=1, PMADR=0) means MONO MIC input connected to Left pin.
|
||
map.r.power_management_1.PMPFIL = 1; // Pre-loaded in top part. Orig value=0, Programmable Digital filter unused (not power up), routed around.
|
||
update(Register::PowerManagement1); // Activating the Power management of the used blocks . (Mic ADC always + Dig Block filter , when used )
|
||
|
||
if (mic_to_HP_enabled)
|
||
microphone_to_HP_enable();
|
||
else
|
||
microphone_to_HP_disable();
|
||
|
||
// 1059/fs, 22ms @ 48kHz
|
||
chThdSleepMilliseconds(22);
|
||
}
|
||
|
||
// Common part for all alc_mode , --------------------------
|
||
// const uint_fast8_t mgain = 0b0111; // Already pre-loaded , in above switch case .
|
||
map.r.signal_select_1.MGAIN20 = mgain & 7; // writing 3 lower bits of mgain , (pre-amp mic gain).
|
||
map.r.signal_select_1.PMMP = 1; // Activating DC Mic Power supply through 2kohms res., similar majority smartphones headphone+mic jack, "plug-in-power"
|
||
map.r.signal_select_1.MPSEL = 1; // MPWR2 pin ,selecting output voltage to MPWR2 pin, that we are using in portapack ext. MIC)
|
||
map.r.signal_select_1.MGAIN3 = (mgain >> 3) & 1; // writing 4th upper bit of mgain (pre-amp mic gain).
|
||
update(Register::SignalSelect1);
|
||
}
|
||
|
||
void AK4951::microphone_disable() {
|
||
map.r.power_management_1.PMADL = 0; // original code , disable Power managem.Mic ADC L
|
||
map.r.power_management_1.PMADR = 0; // original code , disable Power managem.Mic ADC R
|
||
map.r.power_management_1.PMPFIL = 0; // original code , disable Power managem. all Programmable Dig. block
|
||
map.r.power_management_1.PMDAC = 0; // Pre-loaded power management DAC block OFF
|
||
update(Register::PowerManagement1);
|
||
|
||
map.r.power_management_2.PMHPL = 0; // Pre-loaded power management HP LEFT block OFF
|
||
map.r.power_management_2.PMHPR = 0; // Pre-loaded power management HP RIGHT block OFF
|
||
update(Register::PowerManagement2); // Deactivating the Power management of the HP L&R blocks.
|
||
|
||
map.r.alc_mode_control_1.ALC = 0; // original code , Restore , disable ALC block.
|
||
update(Register::ALCModeControl1);
|
||
|
||
map.r.auto_hpf_control.AHPF = 0; //----------- new code addition , Restore disable Wind noise filter OFF (AHPF bit=“0”).
|
||
update(Register::AutoHPFControl);
|
||
|
||
// Restore original AUDIO PATH , condition, (Digital filter block PATH is BY PASSED) (we can also swith off DIG. BLOCK power , PMPFIL=0)
|
||
// The Path in Recording Mode 2 & Playback Mode 2 , (NO DIG FILTER BLOCK AT ALL, not for MIC recording, nor for Playback)
|
||
map.r.digital_filter_mode.ADCPF = 1; // new code addition , ADCPF bit swith ("0" Mic after ADC Output connected (recording mode) to the DIGITAL FILTER BLOCK. ("1" Playback mode)
|
||
map.r.digital_filter_mode.PFSDO = 0; // new code addition , ADC bit switch ("0" : 1st order HPF) connectedto the Output. By bass DIGITAL block .
|
||
map.r.digital_filter_mode.PFDAC = 0b00; // new code addition , (Input selector for DAC (not used in MIC), SDTI= Audio Serial Data Input Pin)
|
||
update(Register::DigitalFilterMode); // Writing the Audio Path : NO DIGITAL BLOCK or DIG BLOCK FOR MIC , Audio mode path : Playback mode /-Recording mode.
|
||
|
||
// Restore original condition , LPF , OFF . same as when not using DIGITAL Programmable block
|
||
map.r.digital_filter_select_2.LPF = 0; // LPF-Block, Coeffic Setting Enable (OFF-Default), When LPF bit is “0”, audio data passes the LPF block by 0dB gain.
|
||
update(Register::DigitalFilterSelect2);
|
||
|
||
map.r.lpf_coefficient_0.l = 0x00; // Pre-loading here LPF 6k , 1st Order from digital Block , Fc=6000 Hz, fs = 48khz
|
||
map.r.lpf_coefficient_1.h = 0x00; // LPF bit is activated down, for all ALC digital modes.
|
||
map.r.lpf_coefficient_2.l = 0x00; // Writting reg to AK4951 , down with update....
|
||
map.r.lpf_coefficient_3.h = 0x00;
|
||
|
||
update(Register::LPFCoefficient0); // Writing pre-loaded 4 bytes LPF CoefFiecients 14 bits (FSA13..0, FSB13..0
|
||
update(Register::LPFCoefficient1);
|
||
update(Register::LPFCoefficient2);
|
||
update(Register::LPFCoefficient3);
|
||
|
||
// Switch off all EQ 1,2,3,4,5
|
||
map.r.digital_filter_select_3.EQ1 = 0; // EQ1 Coeffic Setting , (0: Disable-default, audio data passes EQ1 block by 0dB gain). When EQ1="1”, the settings of E1A15-0, E1B15-0 and E1C15-0 bits are enabled
|
||
map.r.digital_filter_select_3.EQ2 = 0; // EQ2 Coeffic Setting , (0: Disable-default, audio data passes EQ2 block by 0dB gain). When EQ2="1”, the settings of E2A15-0, E2B15-0 and E2C15-0 bits are enabled
|
||
map.r.digital_filter_select_3.EQ3 = 0; // EQ3 Coeffic Setting , (0: Disable-default, audio data passes EQ3 block by 0dB gain). When EQ3="1”, the settings of E3A15-0, E3B15-0 and E3C15-0 bits are enabled
|
||
map.r.digital_filter_select_3.EQ4 = 0; // EQ4 Coeffic Setting , (0: Disable-default, audio data passes EQ4 block by 0dB gain). When EQ4="1”, the settings of E4A15-0, E4B15-0 and E4C15-0 bits are enabled
|
||
map.r.digital_filter_select_3.EQ5 = 0; // EQ5 Coeffic Setting , (0: Disable-default, audio data passes EQ5 block by 0dB gain). When EQ5="1”, the settings of E5A15-0, E5B15-0 and E5C15-0 bits are enabled
|
||
update(Register::DigitalFilterSelect3);
|
||
}
|
||
|
||
void AK4951::microphone_to_HP_enable() {
|
||
map.r.digital_filter_mode.PFDAC = 0b01; // (Input selector for DAC, audio Loopback Mode .
|
||
update(Register::DigitalFilterMode); // Writing the Audio Path , Audio mode path : Loopback Mode .
|
||
|
||
map.r.power_management_1.PMDAC = 1; // Pre-loaded power management DAC block ON
|
||
update(Register::PowerManagement1); // Activating the Power management of the DAC block for the loopback mode
|
||
|
||
map.r.power_management_2.PMHPL = 1; // Pre-loaded power management HP LEFT block ON
|
||
map.r.power_management_2.PMHPR = 1; // Pre-loaded power management HP RIGHT block ON
|
||
update(Register::PowerManagement2); // Activating the Power management of the HP L&R blocks.
|
||
}
|
||
|
||
void AK4951::microphone_to_HP_disable() {
|
||
map.r.digital_filter_mode.PFDAC = 0b00; // (Input selector for DAC (not used in MIC), SDTI= Audio Serial Data Input Pin)
|
||
update(Register::DigitalFilterMode); // Writing the Audio Path , Audio mode path : Loopback Mode .
|
||
|
||
map.r.power_management_1.PMDAC = 0; // Pre-loaded power management DAC block OFF
|
||
update(Register::PowerManagement1); // Deactivating the Power management of the DAC block for the loopback mode
|
||
|
||
map.r.power_management_2.PMHPL = 0; // Pre-loaded power management HP LEFT block OFF
|
||
map.r.power_management_2.PMHPR = 0; // Pre-loaded power management HP RIGHT block OFF
|
||
update(Register::PowerManagement2); // Deactivating the Power management of the HP L&R blocks.
|
||
}
|
||
|
||
reg_t AK4951::read(const address_t reg_address) {
|
||
const std::array<uint8_t, 1> tx{reg_address};
|
||
std::array<uint8_t, 1> rx{0x00};
|
||
bus.transmit(bus_address, tx.data(), tx.size());
|
||
bus.receive(bus_address, rx.data(), rx.size());
|
||
return rx[0];
|
||
}
|
||
|
||
void AK4951::update(const Register reg) {
|
||
write(toUType(reg), map.w[toUType(reg)]);
|
||
}
|
||
|
||
void AK4951::write(const address_t reg_address, const reg_t value) {
|
||
const std::array<uint8_t, 2> tx{reg_address, value};
|
||
bus.transmit(bus_address, tx.data(), tx.size());
|
||
}
|
||
|
||
} /* namespace ak4951 */
|
||
} /* namespace asahi_kasei */
|