Diff: Audio/WM8731.cpp

Revision:

0:c05b00be2229

diff -r 000000000000 -r c05b00be2229 Audio/WM8731.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Audio/WM8731.cpp	Thu Jul 13 19:33:37 2017 +0000
@@ -0,0 +1,424 @@
+/**
+*
+* @section LICENSE
+*
+* Copyright (c) 2012 mbed
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*
+* @section DESCRIPTION
+*    A Driver set for the I2C half of the WM8731. Based on the WM8731
+*    code http://mbed.org/users/p07gbar/code/WM8731/
+*
+*/ 
+
+#include "WM8731.h"
+
+#define WM8731_HP_VOL_DF_MASK 0x80
+
+
+#define WM8731_DF_hp_vol_left     0.5
+#define WM8731_DF_hp_vol_right    0.5
+#define WM8731_DF_li_vol_left     0.5
+#define WM8731_DF_li_vol_right    0.5
+#define WM8731_DF_sdt_vol         0
+
+const uint8_t base_address = 0x1A;
+
+
+WM8731::WM8731(PinName i2c_sda, PinName i2c_scl): i2c(i2c_sda,i2c_scl)  {
+    address = base_address;
+    defaulter();
+    form_cmd(all);
+}
+
+WM8731::WM8731(PinName i2c_sda, PinName i2c_scl, bool cs_level): i2c(i2c_sda,i2c_scl)  {
+    address = base_address + (1*cs_level);
+    defaulter();
+    form_cmd(all);
+}
+
+void WM8731::power(bool on_off) {
+    device_all_pwr = on_off;
+    form_cmd(power_control);
+}
+
+void WM8731::input_select(int input) {
+
+    switch(input)
+    {
+        case WM8731_NO_IN:
+            device_adc_pwr = false;
+            device_mic_pwr = false;
+            device_lni_pwr = false;
+            form_cmd(power_control);
+            break;
+        case WM8731_LINE:
+            device_adc_pwr = true;
+            device_lni_pwr = true;
+            device_mic_pwr = false;
+            ADC_source = WM8731_LINE;
+            form_cmd(power_control);
+            form_cmd(path_analog);
+            break;
+        case WM8731_MIC:
+            device_adc_pwr = true;
+            device_lni_pwr = true;
+            device_mic_pwr = true;
+            ADC_source = WM8731_MIC;
+            form_cmd(power_control);
+            form_cmd(path_analog);
+            break;
+        default:
+            device_adc_pwr     = df_device_adc_pwr;
+            device_mic_pwr     = df_device_mic_pwr;
+            device_lni_pwr     = df_device_lni_pwr;
+            ADC_source         = df_ADC_source;
+            form_cmd(power_control);
+            form_cmd(path_analog);
+            break;
+    }
+    ADC_source_old = ADC_source;
+}
+
+void WM8731::headphone_volume(float h_volume) {
+    hp_vol_left = h_volume;
+    hp_vol_right = h_volume;
+    form_cmd(headphone_vol_left);
+    form_cmd(headphone_vol_right);
+}
+
+void WM8731::linein_volume(float li_volume) {
+    li_vol_left = li_volume;
+    li_vol_right = li_volume;
+    form_cmd(line_in_vol_left);
+    form_cmd(line_in_vol_right);
+}
+
+void WM8731::microphone_boost(bool mic_boost) {
+    mic_boost_ = mic_boost;
+}
+
+void WM8731::input_mute(bool mute) {
+    if(ADC_source == WM8731_MIC)
+    {
+        mic_mute = mute;
+        form_cmd(path_analog);
+    }
+    else
+    {
+        li_mute_left = mute;
+        li_mute_right = mute;
+        form_cmd(line_in_vol_left);
+        form_cmd(line_in_vol_right);
+    }
+}
+
+void WM8731::output_mute(bool mute) {
+    out_mute = mute;
+    form_cmd(path_digital);
+}
+
+void WM8731::input_power(bool on_off) {
+    
+    device_adc_pwr = on_off;
+    
+    if(ADC_source == WM8731_MIC)
+    {
+        device_mic_pwr = on_off;
+        device_lni_pwr = on_off;
+    }
+    else
+    {
+        device_mic_pwr = false;
+        device_lni_pwr = on_off;
+    }
+    
+    form_cmd(power_control);
+}
+
+void WM8731::output_power(bool on_off) {
+    device_dac_pwr = on_off;
+    device_out_pwr = on_off;
+    
+    form_cmd(power_control);
+}
+
+void WM8731::wordsize(int words) {
+    device_bitlength = words;
+    form_cmd(interface_format);
+}
+
+void WM8731::master(bool master) {
+    device_master = master;
+    form_cmd(interface_format);
+}
+
+void WM8731::frequency(int freq) {
+    ADC_rate = freq;
+    DAC_rate = freq;
+    form_cmd(sample_rate);
+}
+
+void WM8731::input_highpass(bool enabled) {
+    ADC_highpass_enable = enabled;
+    form_cmd(path_digital);
+}
+
+void WM8731::output_softmute(bool enabled) {
+    out_mute = enabled;
+    form_cmd(path_digital);
+}
+
+void WM8731::interface_switch(bool on_off) {
+    device_interface_active = on_off;
+    form_cmd(interface_activation);
+}
+
+void WM8731::sidetone(float sidetone_vol) {
+    sdt_vol = sidetone_vol;
+    form_cmd(path_analog);
+}
+
+void WM8731::deemphasis(char code) {
+    de_emph_code = code & 0x03;
+    form_cmd(path_digital);
+}
+
+void WM8731::reset() {
+    form_cmd(reset_reg);
+}
+
+void WM8731::start() {
+    interface_switch(true);
+}
+
+void WM8731::bypass(bool enable) {
+    bypass_ = enable;
+    form_cmd(path_analog);
+}
+
+void WM8731::stop() {
+    interface_switch(false);
+}
+
+void WM8731::command(reg_address add, uint16_t cmd) {
+    char temp[2];
+    temp[0] = (char(add)<<1) | ((cmd >> 6) & 0x01);
+    temp[1] = (cmd & 0xFF);
+    i2c.write((address<<1), temp, 2);
+}
+
+void WM8731::form_cmd(reg_address add) {
+    uint16_t cmd = 0;
+    int temp = 0;
+    bool mute;
+    switch(add)
+    {
+        case line_in_vol_left:
+            temp = int(li_vol_left * 32) - 1;
+            mute = li_mute_left;
+            
+            if(temp < 0) 
+            {
+                temp = 0; 
+                mute = true;
+            }
+            cmd = temp & 0x1F;
+            cmd |= mute << 7;
+            break;
+        case line_in_vol_right:
+            temp = int(li_vol_right * 32) - 1;
+            mute = li_mute_right;
+            if(temp < 0) 
+            {
+                temp = 0; 
+                mute = true;
+            }
+            cmd = temp & 0x1F;
+            cmd |= mute << 7;
+            break;
+            
+        case headphone_vol_left:
+            temp = int(hp_vol_left * 80) + 47;
+            cmd = WM8731_HP_VOL_DF_MASK;
+            cmd |= temp & 0x7F;
+            break;
+        case headphone_vol_right:
+            temp = int(hp_vol_right * 80) + 47;
+            cmd = WM8731_HP_VOL_DF_MASK;
+            cmd |= temp & 0x7F;
+            break;
+        
+        case path_analog:
+            temp = int(sdt_vol * 4);
+            char vol_code = 0;
+            switch(temp)
+            {
+                case 4:
+                    vol_code = 0x01;
+                    break;
+                case 0:
+                    vol_code = 0x00;
+                    break;
+                default:
+                    vol_code = (((0x04 - temp)&0x03) << 1) | 0x01;
+                    break;
+            }
+            cmd = vol_code << 5;
+            cmd |= 1 << 4;
+            cmd |= bypass_ << 3;
+            cmd |= ADC_source << 2;
+            cmd |= mic_mute << 1;
+            cmd |= mic_boost_;
+            break;
+            
+        case path_digital:
+            cmd |= out_mute << 3;
+            cmd |= ((de_emph_code & 0x3) << 1);
+            cmd |= ADC_highpass_enable;
+            break;
+        
+        case power_control:
+            cmd |= !device_all_pwr << 7;
+            cmd |= !device_clk_pwr << 6;
+            cmd |= !device_osc_pwr << 5;
+            cmd |= !device_out_pwr << 4;
+            cmd |= !device_dac_pwr << 3;
+            cmd |= !device_adc_pwr << 2;
+            cmd |= !device_mic_pwr << 1;
+            cmd |= !device_lni_pwr << 0;
+            break;
+            
+        case interface_format:
+            cmd |= device_master << 6;
+            cmd |= device_lrswap << 5;
+            cmd |= device_lrws     << 4;
+            temp = 0;
+            switch(device_bitlength)
+            {
+                case 16:
+                    temp = 0;
+                    break;
+                case 20:
+                    temp =  1;
+                    break;
+                case 24:
+                    temp = 2;
+                    break;
+                case 32:
+                    temp = 3;
+                    break;
+            }
+            cmd |= (temp & 0x03) << 2;
+            cmd |= (device_data_form & 0x03);
+            break;
+        
+        case sample_rate:
+            temp = gen_samplerate();
+            cmd = device_usb_mode;
+            cmd |= (temp & 0x1f) << 1;
+            cmd |= device_clk_in_div << 6;
+            cmd |= device_clk_out_div << 7;
+            break;
+            
+        case interface_activation:
+            cmd = device_interface_active;
+            break;
+            
+        case reset_reg:
+            cmd = 0;
+            break;
+        
+        case all:
+            for( int i = line_in_vol_left; i <= reset_reg; i++)
+            {
+                form_cmd((reg_address)i);
+            }
+            break;
+    }
+    if(add != all) command(add , cmd);
+}
+
+void WM8731::defaulter() {
+    hp_vol_left = WM8731_DF_hp_vol_left;
+    hp_vol_right = WM8731_DF_hp_vol_right;
+    li_vol_left = WM8731_DF_li_vol_left;
+    li_vol_right = WM8731_DF_li_vol_right;
+    sdt_vol = WM8731_DF_sdt_vol;
+    bypass_ = df_bypass_;
+    
+    ADC_source = df_ADC_source;
+    ADC_source_old = df_ADC_source;
+    
+    mic_mute = df_mic_mute;
+    li_mute_left = df_li_mute_left;
+    li_mute_right = df_li_mute_right;
+    
+    
+    mic_boost_ = df_mic_boost_;
+    out_mute = df_out_mute;
+    de_emph_code = df_de_emph_code;
+    ADC_highpass_enable = df_ADC_highpass_enable;
+    
+    device_all_pwr = df_device_all_pwr;
+    device_clk_pwr = df_device_clk_pwr;
+    device_osc_pwr = df_device_osc_pwr;
+    device_out_pwr = df_device_out_pwr;
+    device_dac_pwr = df_device_dac_pwr;
+    device_adc_pwr = df_device_dac_pwr;
+    device_mic_pwr = df_device_mic_pwr;
+    device_lni_pwr = df_device_lni_pwr;
+    
+    device_master       = df_device_master;
+    device_lrswap       = df_device_lrswap;
+    device_lrws         = df_device_lrws;
+    device_bitlength    = df_device_bitlength;
+
+    
+    ADC_rate  = df_ADC_rate;
+    DAC_rate  = df_DAC_rate;
+
+    device_interface_active  = df_device_interface_active;
+}
+
+char WM8731::gen_samplerate() {
+    char temp = 0;
+    switch(ADC_rate)
+    {
+        case 96000:
+            temp = 0x0E;
+            break;
+        case 48000:
+            temp = 0x00;
+            if(DAC_rate == 8000) temp = 0x02;
+            break;
+        case 32000:
+            temp = 0x0C;
+            break;
+        case 8000:
+            temp = 0x06;
+            if(DAC_rate == 48000) temp = 0x04;
+            break;
+        default:
+            temp = 0x00;
+            break;
+    }
+    return temp;
+}