Handmade 5.1 digital audio controller with ATmega328 | Breadboard Circuit
June 20, 2021
This controller is designed for PT2323 and PT2322. The used microcontroller is ATmega328. It is programmed with Arduino.
Features
1. Power ON/OFF
2. 4 Stereo inputs and One 6-channel input
3. Master volume control: 0 to 79
4. Mute switch
5. Menu 1 - Tone control (Bass, Middle, Treble): 0 to 15
6. Menu 2 - SUB output TRIM volume control: 0 to 15
7. Menu 3 - 5-channels output TRIM volume control: 0 to 15
8. Menu 4 - Surround ON/OFF, Speaker mode select (5.1/2.1) and Sound mode select (Normal, Rock, Pop & Classic)
NOTE : Press the Rotary Encoder's switch for selecting the Menu and rotate the Rotary Encoder for selecting the Submenu (Bass, Mid, Treb, FL, FR, CN, SL, SR, Surr, Mode & Pro). Then press the Rotary Encoder's switch and rotate the Rotary Encoder for changing the value and press the Rotary Encoder's switch again.
Application Circuit
Part list
| U1 | ATmega328 |
| C1 | 10uF |
| C2 & C3 | 22pF |
| R1-R6 | 10K |
| R7 | 220R |
| X1 | 16MHZ |
| SW1-SW3 | Push Switch |
| LCD1 | 16x2 |
| Rotary Encoder |
Arduino Code
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// 5.1 Surround System
// DaacWaves <https://https://daacwaves.blogspot.com>
#include <Wire.h>
#include <LiquidCrystal.h>
#include <EEPROM.h>
#define PT2323_address 0b1001010
#define PT2322_address 0b1000100
#define sw01 9 // SW
#define sw02 11 // DT
#define sw03 10 // CLK
#define sw04 A0 // Input
#define sw05 A1 // Mute
#define sw06 A2 // Power
#define sw07 13 // Out
byte custom_num[8][8] = {
{ B00111,B01111,B11111,B11111,B11111,B11111,B11111,B11111 },
{ B11111,B11111,B11111,B00000,B00000,B00000,B00000,B00000 },
{ B11100,B11110,B11111,B11111,B11111,B11111,B11111,B11111 },
{ B11111,B11111,B11111,B11111,B11111,B11111,B01111,B00111 },
{ B00000,B00000,B00000,B00000,B00000,B11111,B11111,B11111 },
{ B11111,B11111,B11111,B11111,B11111,B11111,B11110,B11100 },
{ B11111,B11111,B11111,B00000,B00000,B00000,B11111,B11111 },
{ B11111,B11111,B11111,B11111,B11111,B11111,B11111,B11111 }};
const int digit_width = 3;
// 0 1 2 3 4 5 6 7 8 9
const char custom_num_top[10][digit_width]={ 0,1,2, 1,2,32, 6,6,2, 6,6,2, 3,4,7, 7,6,6, 0,6,6, 1,1,2, 0,6,2, 0,6,2};
const char custom_num_bot[10][digit_width]={ 3,4,5, 4,7,4, 7,4,4, 4,4,5, 32,32,7, 4,4,5, 3,4,5, 32,32,7, 3,4,5, 4,4,5};
byte arrow_left[8] = {B00100,B01100,B11100,B01100,B00100,B00000,B00000,B00000};
byte arrow_right[8] = {B00100,B00110,B00111,B00110,B00100,B00000,B00000,B00000};
byte arrow_bottom[8] = {B00100,B00100,B00100,B11111,B01110,B00100,B00000,B00000};
LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // RS,E,D4,D5,D6,D7
unsigned long time;
int in, vol, bass, mid, treb, sub, fl, cn, fr, sl, sr, mute, ch_mute, eeprom, surr, mix, vol_10, vol_1, a, b, mute_sel, effect_sel, tone_sel, sound_mode, speaker_mode, sub_menu, menu_sel, power, vol_on;
int menu, sub_menu_sel, sub_menu_item, sub_menu_item_sel;
int sub_v, sub_10, sub_1;
void setup() {
Wire.begin();
Serial.begin(9600);
pinMode(sw01, INPUT); // SW
pinMode(sw02, INPUT); // DT
pinMode(sw03, INPUT); // CLK
pinMode(sw04, INPUT); // Input
pinMode(sw05, INPUT); // Mute
pinMode(sw06, INPUT); // Power
pinMode(sw07, OUTPUT); // Out
lcd.begin(16, 2);
power = 0;
eeprom_read();
power_up();
}
void loop() {
lcd_update();
eeprom_update();
if(menu == 0 || menu == 2) {
custom_num_shape();
} else {
custom_shape();
}
//power -------------------------------------------------//
if (analogRead(sw06) > 900) {
power++;
if (power > 1) {
power = 0;
}
power_up();
delay(300);
}
if(power == 1) {
//select input -------------------------------------------------//
if (analogRead(sw04) > 900) {
in++;
set_in();
btn_cl();
}
//select menu -------------------------------------------------//
if (digitalRead(sw01) == LOW && menu_sel == 0) {
menu++;
if (menu > 4) {
menu = 0;
}
btn_cl();
}
//mute -------------------------------------------------//
if (analogRead(sw05) > 900) {
mute++;
set_mute();
delay(300);
}
if(mute == 1) {
vol_on = 1;
} else {
vol_on = 0;
}
}
//volume -------------------------------------------------//
if (menu == 0) {
if (digitalRead(sw03) == LOW && vol_on == 0) {
vol++;
set_vol();
btn_cl();
}
if (digitalRead(sw02) == LOW && vol_on == 0) {
vol--;
set_vol();
btn_cl();
}
menu_sel = 0;
sub_menu = 0;
sub_menu_item = 0;
sub_menu_item_sel = 0;
}
//menu 1 -------------------------------------------------//
if (menu == 1) {
set_sub_menu();
switch(sub_menu){
//bass -------------------------------------------------//
case 1:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
bass++;
set_bass();
sound_mode = 0;
btn_cl();
}
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
bass--;
set_bass();
sound_mode = 0;
btn_cl();
}
break;
//mid -------------------------------------------------//
case 2:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
mid++;
set_mid();
sound_mode = 0;
btn_cl();
}
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
mid--;
set_mid();
sound_mode = 0;
btn_cl();
}
break;
//treb -------------------------------------------------//
case 3:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
treb++;
set_treb();
sound_mode = 0;
btn_cl();
}
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
treb--;
set_treb();
sound_mode = 0;
btn_cl();
}
break;
case 4:
sub_menu = 0;
break;
}
}
//menu 2 -------------------------------------------------//
if (menu == 2) {
if (digitalRead(sw03) == LOW) {
sub++;
set_sub();
btn_cl();
}
if (digitalRead(sw02) == LOW) {
sub--;
set_sub();
btn_cl();
}
}
//menu 3 -------------------------------------------------//
if (menu == 3) {
set_sub_menu();
switch(sub_menu){
//FL -------------------------------------------------//
case 1:
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
fl++;
set_fl();
btn_cl();
}
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
fl--;
set_fl();
btn_cl();
}
break;
//FR -------------------------------------------------//
case 2:
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
fr++;
set_fr();
btn_cl();
}
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
fr--;
set_fr();
btn_cl();
}
break;
//CN -------------------------------------------------//
case 3:
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
cn++;
set_cn();
btn_cl();
}
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
cn--;
set_cn();
btn_cl();
}
break;
//SL -------------------------------------------------//
case 4:
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
sl++;
set_sl();
btn_cl();
}
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
sl--;
set_sl();
btn_cl();
}
break;
//SR -------------------------------------------------//
case 5:
if (digitalRead(sw03) == LOW && sub_menu_item == 1) {
sr++;
set_sr();
btn_cl();
}
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
sr--;
set_sr();
btn_cl();
}
break;
case 6:
sub_menu = 0;
break;
}
}
//menu 4 -------------------------------------------------//
if (menu == 4) {
set_sub_menu();
switch(sub_menu){
//surrond on off -------------------------------------------------//
case 1:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
surr++;
set_surr();
btn_cl();
}
break;
//speaker mode -------------------------------------------------//
case 2:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
speaker_mode++;
set_speaker_mode();
btn_cl();
}
break;
//sound mode -------------------------------------------------//
case 3:
if (digitalRead(sw02) == LOW && sub_menu_item == 1) {
sound_mode++;
set_sound_mode();
btn_cl();
}
break;
case 4:
sub_menu = 0;
break;
}
}
}
//eeprom --------------------------------------------------------------------------------//
void eeprom_update(){
if (millis() - time > 5000 && eeprom == 1 && mute == 0) {
EEPROM.update(0, in);
EEPROM.update(1, vol);
EEPROM.update(2, bass);
EEPROM.update(3, mid);
EEPROM.update(4, treb);
EEPROM.update(5, sub);
EEPROM.update(6, fl);
EEPROM.update(7, fr);
EEPROM.update(8, cn);
EEPROM.update(9, sl);
EEPROM.update(10, sr);
EEPROM.update(11, surr);
EEPROM.update(12, mix);
EEPROM.update(13, speaker_mode);
EEPROM.update(14, sound_mode);
menu = 0;
eeprom = 0;
lcd.clear();
}
}
void eeprom_read(){
in = EEPROM.read(0);
vol = EEPROM.read(1);
bass = EEPROM.read(2);
mid = EEPROM.read(3);
treb = EEPROM.read(4);
sub = EEPROM.read(5);
fl = EEPROM.read(6);
fr = EEPROM.read(7);
cn = EEPROM.read(8);
sl = EEPROM.read(9);
sr = EEPROM.read(10);
surr = EEPROM.read(11);
mix = EEPROM.read(12);
speaker_mode = EEPROM.read(13);
sound_mode = EEPROM.read(14);
}
void btn_cl() {
delay(300);
lcd.clear();
time = millis();
eeprom = 1;
}
//power up --------------------------------------------------------------------------------//
void power_up() {
if(power == 1) {
digitalWrite(sw07, HIGH);
mute = 1;
lcd.clear();
delay(500);
lcd.setCursor(0, 0);
lcd.print(" Ui Tech ");
delay(500);
lcd.setCursor(0, 1);
lcd.print(" 5.1 System ");
delay(1000);
lcd.clear();
mute = 0;
pt2322_input_sw();
pt2322_function(0, 1, 0);
set_speaker_mode();
set_sound_mode();
set_vol();
set_in();
set_surr();
set_mix();
set_mute();
set_fl();
set_fr();
set_cn();
set_sl();
set_sr();
menu = 0;
} else {
digitalWrite(sw07, LOW);
mute = 1;
set_mute();
delay(100);
menu = 100;
}
}
//lcd --------------------------------------------------------------------------------//
void lcd_update(){
lcd.setCursor(0, 0);
switch(menu){
case 0:
//input -------------------------------------------------//
lcd.setCursor(0, 0);
if(in == 0) {
lcd.print("USB");
}
if(in == 1) {
lcd.print("BLU");
}
if(in == 2) {
lcd.print("FM");
}
if(in == 3) {
lcd.print("AUX");
}
if(in == 4) {
lcd.print("DVD");
}
//vol -------------------------------------------------//
lcd.setCursor(0, 1);
if(mute == 1) {
a = 7;
b = 9;
lcd.print("MUT");
} else {
a = vol_10;
b = vol_1;
lcd.print("VOL");
}
lcd.setCursor(4, 0);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_top[7 - a][i]);
lcd.setCursor(4, 1);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_bot[7 - a][i]);
lcd.setCursor(8, 0);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_top[9 - b][i]);
lcd.setCursor(8, 1);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_bot[9 - b][i]);
//speaker mode -------------------------------------------------//
lcd.setCursor(13, 0);
if(sound_mode == 0) {
lcd.print("NOR");
}
if(sound_mode == 1) {
lcd.print("ROC");
}
if(sound_mode == 2) {
lcd.print("POP");
}
if(sound_mode == 3) {
lcd.print("CLA");
}
//sound mode -------------------------------------------------//
lcd.setCursor(13, 1);
if(speaker_mode == 0) {
lcd.print("5.1");
}
if(speaker_mode == 1) {
lcd.print("2.1");
}
break;
case 1:
lcd.setCursor(0, 0);
if(sub_menu == 0) {
lcd.write(1);
} else {
lcd.print(" ");
}
//bass -------------------------------------------------//
lcd.setCursor(1, 0);
if(sub_menu == 1 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 1) {
lcd.write(3);
} else {
lcd.print("Bass");
}
lcd.setCursor(1, 1);
lcd.print(bass);
//mid -------------------------------------------------//
lcd.setCursor(6, 0);
if(sub_menu == 2 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 2) {
lcd.write(3);
} else {
lcd.print("Mid");
}
lcd.setCursor(6, 1);
lcd.print(mid);
//treb -------------------------------------------------//
lcd.setCursor(11, 0);
if(sub_menu == 3 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 3) {
lcd.write(3);
} else {
lcd.print("Treb");
}
lcd.setCursor(11, 1);
lcd.print(treb);
break;
case 2:
//SUB -------------------------------------------------//
sub_v = 15 - sub;
sub_10 = sub_v / 10;
sub_1 = sub_v - sub_10 * 10;
lcd.setCursor(0, 0);
lcd.print("SUB");
lcd.setCursor(4, 0);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_top[sub_10][i]);
lcd.setCursor(4, 1);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_bot[sub_10][i]);
lcd.setCursor(8, 0);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_top[sub_1][i]);
lcd.setCursor(8, 1);
for(int i=0; i < digit_width; i++)
lcd.print(custom_num_bot[sub_1][i]);
break;
case 3:
lcd.setCursor(0, 0);
if(sub_menu == 0) {
lcd.write(1);
} else {
lcd.print(" ");
}
//FL -------------------------------------------------//
lcd.setCursor(1, 0);
if(sub_menu == 1 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 1) {
lcd.write(3);
} else {
lcd.print("FL");
}
lcd.setCursor(1, 1);
lcd.print(15 - fl);
//FR -------------------------------------------------//
lcd.setCursor(4, 0);
if(sub_menu == 2 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 2) {
lcd.write(3);
} else {
lcd.print("FR");
}
lcd.setCursor(4, 1);
lcd.print(15 - fr);
//CN -------------------------------------------------//
lcd.setCursor(7, 0);
if(sub_menu == 3 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 3) {
lcd.write(3);
} else {
lcd.print("CN");
}
lcd.setCursor(7, 1);
lcd.print(15 - cn);
//SL -------------------------------------------------//
lcd.setCursor(10, 0);
if(sub_menu == 4 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 4) {
lcd.write(3);
} else {
lcd.print("SL");
}
lcd.setCursor(10, 1);
lcd.print(15 - sl);
//SR -------------------------------------------------//
lcd.setCursor(13, 0);
if(sub_menu == 5 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 5) {
lcd.write(3);
} else {
lcd.print("SR");
}
lcd.setCursor(13, 1);
lcd.print(15 - sr);
break;
case 4:
lcd.setCursor(0, 0);
if(sub_menu == 0) {
lcd.write(1);
} else {
lcd.print(" ");
}
//surrond on off -------------------------------------------------//
lcd.setCursor(1, 0);
if(sub_menu == 1 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 1) {
lcd.write(3);
} else {
lcd.print("Surr");
}
lcd.setCursor(1, 1);
if(surr == 0) {
lcd.print("ON");
}
if(surr == 1) {
lcd.print("OFF");
}
//speaker mode -------------------------------------------------//
lcd.setCursor(6, 0);
if(sub_menu == 2 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 2) {
lcd.write(3);
} else {
lcd.print("Mode");
}
lcd.setCursor(6, 1);
if(speaker_mode == 0) {
lcd.print("5.1");
}
if(speaker_mode == 1) {
lcd.print("2.1");
}
//sound mode -------------------------------------------------//
lcd.setCursor(11, 0);
if(sub_menu == 3 && sub_menu_item_sel == 1) {
lcd.write(2);
} else if(sub_menu == 3) {
lcd.write(3);
} else {
lcd.print("Pro");
}
lcd.setCursor(11, 1);
if(sound_mode == 0) {
lcd.print("NOR");
}
if(sound_mode == 1) {
lcd.print("ROCK");
}
if(sound_mode == 2) {
lcd.print("POP");
}
if(sound_mode == 3) {
lcd.print("CLAS");
}
break;
case 100:
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 1);
lcd.print(" Stand by ");
break;
}
}
//custom shape --------------------------------------------------------------------------------//
void custom_num_shape(){
for(int i=0; i < 8; i++)
lcd.createChar(i, custom_num[i]);
}
void custom_shape(){
lcd.createChar(1, arrow_left);
lcd.createChar(3, arrow_right);
lcd.createChar(2, arrow_bottom);
}
//sub menu --------------------------------------------------------------------------------//
void set_sub_menu(){
if (digitalRead(sw02) == LOW && sub_menu_sel == 0) {
sub_menu++;
btn_cl();
}
if (digitalRead(sw03) == LOW && sub_menu_sel == 0) {
sub_menu--;
if (sub_menu < 0) {
sub_menu = 0;
}
btn_cl();
}
if(sub_menu != 0){
menu_sel = 1;
if (digitalRead(sw01) == LOW && sub_menu_item_sel == 0 && menu_sel == 1) {
sub_menu_sel = 1;
sub_menu_item = 1;
sub_menu_item_sel = 1;
btn_cl();
}
if (digitalRead(sw01) == LOW && sub_menu_item_sel == 1) {
sub_menu_sel = 0;
sub_menu_item = 0;
sub_menu_item_sel = 0;
btn_cl();
}
} else if(sub_menu == 0){
menu_sel = 0;
sub_menu_sel = 0;
}
}
//speaker mode --------------------------------------------------------------------------------//
void set_speaker_mode() {
if (speaker_mode > 1) {
speaker_mode = 0;
}
switch(speaker_mode) {
case 0: // 5.1 mode
ch_mute = 0;
surr = 0;
break;
case 1: // 2.1 mode
ch_mute = 1;
surr = 1;
break;
}
set_cn();
set_sl();
set_sr();
set_surr();
}
//sound mode --------------------------------------------------------------------------------//
void set_sound_mode() {
if (sound_mode > 3) {
sound_mode = 0;
}
switch(sound_mode) {
case 0: // Normal
bass = 7;
mid = 7;
treb = 7;
break;
case 1: // Rock
bass = 11;
mid = 5;
treb = 12;
break;
case 2: // Pop
bass = 4;
mid = 10;
treb = 5;
break;
case 3: // Classic
bass = 7;
mid = 7;
treb = 5;
break;
}
set_bass();
set_mid();
set_treb();
}
//pt2323 settings --------------------------------------------------------------------------------//
void set_in(){
if (in > 4) {
in = 0;
}
switch(in){
case 0: a = 0b11001011; break; // 1 input
case 1: a = 0b11001010; break; // 2 input
case 2: a = 0b11001001; break; // 3 input
case 3: a = 0b11001000; break; // 4 input
case 4: a = 0b11000111; break; // 6 CH input
}
pt2323_send(a);
}
void set_surr(){
if (surr > 1) {
surr = 0;
}
switch(surr){
case 0: a = 0b11010000; break; // Surround ON
case 1: a = 0b11010001; break; // Surround OFF
}
pt2323_send(a);
}
void set_mix(){
if (mix > 1) {
mix = 0;
}
switch(mix){
case 0: a = 0b10010000; break; // 0dB setup
case 1: a = 0b10010001; break; // +6dB setup
}
pt2323_send(a);
}
void set_mute(){
if (mute > 1) {
mute = 0;
}
switch(mute){
case 0: a = 0b11111110; break; // All CH mute disabled
case 1: a = 0b11111111; break; // All CH mute
}
pt2323_send(a);
}
//pt2322 settings --------------------------------------------------------------------------------//
void pt2322_function(int pt2322_mute, int effect, int tone_ctrl) {
switch(pt2322_mute){
case 0: mute_sel = 0b00000000; break;
case 1: mute_sel = 0b00001000; break;
}
switch(effect){
case 0: effect_sel = 0b00000000; break;
case 1: effect_sel = 0b00000100; break;
}
switch(tone_ctrl){
case 0: tone_sel = 0b00000000; break;
case 1: tone_sel = 0b00000010; break;
}
pt2322_send(0b01110000 + mute_sel + effect_sel + tone_sel);
}
void set_vol(){
if (vol > 79) {
vol = 79;
}
if (vol < 0) {
vol = 0;
}
vol_10 = vol / 10;
vol_1 = vol - vol_10 * 10;
a = vol_10 + 0b11100000;
b = vol_1 + 0b11010000;
Wire.beginTransmission(PT2322_address);
Wire.write (a);
Wire.write (b);
Wire.endTransmission();
}
void set_bass(){
if (bass > 15) {
bass = 15;
}
if (bass < 0) {
bass = 0;
}
a = bass;
if(bass > 7){
a = 23 - bass;
}
pt2322_send(0b10010000 + a);
}
void set_mid(){
if (mid > 15) {
mid = 15;
}
if (mid < 0) {
mid = 0;
}
a = mid;
if(mid > 7){
a = 23 - mid;
}
pt2322_send(0b10100000 + a);
}
void set_treb(){
if (treb > 15) {
treb = 15;
}
if (treb < 0) {
treb = 0;
}
a = treb;
if(treb > 7){
a = 23 - treb;
}
pt2322_send(0b10110000 + a);
}
void set_sub(){
if (sub > 15) {
sub = 15;
}
if (sub < 0) {
sub = 0;
}
pt2322_send(0b01100000 + sub);
}
void set_fl(){
if (fl > 15) {
fl = 15;
}
if (fl < 0) {
fl = 0;
}
pt2322_send(0b00010000 + fl);
}
void set_fr(){
if (fr > 15) {
fr = 15;
}
if (fr < 0) {
fr = 0;
}
pt2322_send(0b00100000 + fr);
}
void set_cn(){
if (cn > 15) {
cn = 15;
}
if (cn < 0) {
cn = 0;
}
switch(ch_mute){
case 0: a = 0b11110100; break; // CN mute disabled
case 1: a = 0b11110101; break; // CN mute
}
pt2323_send(a);
pt2322_send(0b00110000 + cn);
}
void set_sl(){
if (sl > 15) {
sl = 15;
}
if (sl < 0) {
sl = 0;
}
switch(ch_mute){
case 0: a = 0b11111000; break; // SL mute disabled
case 1: a = 0b11111001; break; // SL mute
}
pt2323_send(a);
pt2322_send(0b01000000 + sl);
}
void set_sr(){
if (sr > 15) {
sr = 15;
}
if (sr < 0) {
sr = 0;
}
switch(ch_mute){
case 0: a = 0b11111010; break; // SR mute disabled
case 1: a = 0b11111011; break; // SR mute
}
pt2323_send(a);
pt2322_send(0b01010000 + sr);
}
//pt2323 & pt2322 send --------------------------------------------------------------------------------//
void pt2323_send(char c){
Wire.beginTransmission(PT2323_address);
Wire.write (c);
Wire.endTransmission();
}
void pt2322_input_sw() {
Wire.beginTransmission(PT2322_address);
Wire.write (0b11000111);
Wire.endTransmission();
}
void pt2322_send(char c){
Wire.beginTransmission(PT2322_address);
Wire.write (c);
Wire.endTransmission();
}
//end code
