Internet Radio

#include <LiquidCrystal.h>

/* Rotary encoder read example */

#define ENC_A 14

#define ENC_B 15

#define ENC_PORT PINC

#define PLAY 8

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

String channelStr[16] = {

  String("channel01"), String("channel02"), String("channel03"), String("channel04"),

  String("channel05"), String("channel06"), String("channel07"), String("channel08"),

  String("channel09"), String("channel10"), String("channel11"), String("channel12"),

  String("channel13"), String("channel14"), String("channel15"), String("channel16")};

String name = String("");

String title = String("");

byte numChan = 16;

char inData[100];

byte index = 0;

byte numChar = 23;

byte numCh;

boolean playState;

boolean playPressed;

unsigned long scroll;

int scnm = 0;

int sctl = 0;

int scn = 0;

int sct = 0;

int ndir = 1;

int sdir = 1;

void setup()

{

  /* Setup encoder pins as inputs */

  pinMode(ENC_A, INPUT);

  digitalWrite(ENC_A, HIGH);

  pinMode(ENC_B, INPUT);

  digitalWrite(ENC_B, HIGH);

  pinMode(PLAY, INPUT);

  digitalWrite(PLAY, HIGH);

  Serial.begin (115200);

  Serial.println("Start");

  // set up the LCD's number of columns and rows:  

  lcd.begin(20, 4);

  // Print a message to the LCD.

  lcd.setCursor(1, 0);

  lcd.print(channelStr[0]);

  lcd.setCursor(0, 0);

  lcd.print(">");

  playState = false;

  playPressed = false;

  lcd.setCursor(16, 3);

  lcd.print("Stop");

  scroll = millis();

}

void loop()

{

  static uint8_t counter = 0;      //this variable will be changed by encoder input

  static boolean bis = false;

  int8_t tmpdata;

  char c;

  if (Serial.available() > 0) {

    if (index < numChar) {

      if (index == 0) {

        c = Serial.read();

        if (c == 'A' || c == 'N' || c == 'S') {

          inData[index++] = c;

        }

      }

      else if (index == 1 && (inData[0] == 'A' || inData[0] == 'N' || inData[0] == 'S')) {

        c = Serial.read();

        if (c == 'B' || c == 'M' || c == 'T') {

          inData[index++] = c;

        }

        else {

          inData[0] = ' ';

          index = 0;

        }

      }

      else if (index == 2 && inData[0] == 'N' && inData[1] == 'M') {

        c = Serial.read();

        inData[index++] = c;        

        numCh = (c - 48) * 10;

      }

      else if (index == 3 && inData[0] == 'N' && inData[1] == 'M') {

        c = Serial.read();

        inData[index++] = c;        

        numCh = numCh + c - 48;

        numChar = numCh;

      }

      else if (index == 2 && inData[0] == 'S' && inData[1] == 'T') {

        c = Serial.read();

        inData[index++] = c;        

        numCh = (c - 48) * 10;

      }

      else if (index == 3 && inData[0] == 'S' && inData[1] == 'T') {

        c = Serial.read();

        inData[index++] = c;        

        numCh = numCh + c - 48;

        numChar = numCh;

      }

      else {

        inData[index++] = Serial.read();

      }

    }

  }

  if (index >= numChar) {

    index = 0;

    Serial.flush();

  }

  String tmpStr = String("");

  if (index == 0 && inData[0] == 'A' && inData[1] == 'B') {

    for(int i = 0; i < (numChar - 2); i++) {

      if (i > 1) {

        if (inData[i] == '#')

          tmpStr += ' ';

        else

          tmpStr += inData[i];

      }

      inData[i] = ' ';

    }

    int chNum = (inData[numChar - 2] - 48) * 10 + (inData[numChar - 1] - 48);

    channelStr[chNum] = tmpStr;

    if (chNum == (counter % numChan)) {

      lcd.setCursor(1, 0);

      lcd.print(channelStr[chNum]);

      Serial.print(counter, DEC);

      Serial.print('\n');

    }

    lcd.setCursor(8, 3);

    lcd.print("  ");

    lcd.setCursor(8, 3);

    lcd.print(chNum, DEC);

    inData[numChar - 2] = ' ';

    inData[numChar - 1] = ' ';

  }

  else if (index == 0 && inData[0] == 'N' && inData[1] == 'M') {

    for(int i = 0; i < numChar; i++) {

      if (i > 3) {

        tmpStr += inData[i];

      }

      inData[i] = ' ';

    }

    lcd.setCursor(0, 1);

    lcd.print("                    ");

    lcd.setCursor(0, 1);

    tmpStr.trim();

    name = tmpStr;

    lcd.print(name.substring(0, 20));

    numChar = 23;

  }

  else if (index == 0 && inData[0] == 'S' && inData[1] == 'T') {

    for(int i = 0; i < numChar; i++) {

      if (i > 3) {

        tmpStr += inData[i];

      }

      inData[i] = ' ';

    }

    lcd.setCursor(0, 2);

    lcd.print("                    ");

    lcd.setCursor(0, 2);

    tmpStr.trim();

    title = tmpStr;

    lcd.print(title.substring(0, 20));

    numChar = 23;

    sctl = 0;

    sct = 0;

    sdir = 1;

  }

  if (millis() > scroll) {

    scroll = scroll + 200;

    int nmlen = name.length();

    int tllen = title.length();

    if (nmlen > 20) {

      if (scnm >= 0 && scnm <= nmlen - 20) {

        lcd.setCursor(0, 1);

        lcd.print(name.substring(scnm, 20 + scnm));

        if (scnm == 0 && scn < 10) {

          scn++;

          ndir = 1;

        }

        else if (scnm == (nmlen - 20) && scn < 10) {

          scn++;

          ndir = -1;

        }

        else

        {

          scnm += ndir;

          scn = 0;

        }

      }

      //else {

        //scnm = 0;

      //}

    }

    if (tllen > 20) {

      if (sctl >= 0 && sctl <= tllen - 20) {

        lcd.setCursor(0, 2);

        lcd.print(title.substring(sctl, 20 + sctl));

        if (sctl == 0 && sct < 10) {

          sct++;

          sdir = 1;

        }

        else if (sctl == (tllen - 20) && sct < 10) {

          sct++;

          sdir = -1;

        }

        else

        {

          sctl += sdir;

          sct = 0;

        }

      }

      //else {

        //sctl = 0;

      //}

    }

  }

  read_button();

  tmpdata = read_encoder();

  delay(1);

  if (tmpdata != 0) {

    bis = !bis;

    if (bis) {

      counter += tmpdata;

      //Serial.print("Counter value: ");

      Serial.print((counter % 16), DEC);

      Serial.print('\n');

      lcd.setCursor(0, 0);

      lcd.print(" ");

      lcd.setCursor(1, 0);

      lcd.print("                   ");

      lcd.setCursor(1, 0);

      lcd.print(channelStr[counter % numChan]);

      lcd.setCursor(0, 0);

      lcd.print(">");

      lcd.setCursor(12, 3);

      lcd.print("   ");

      lcd.setCursor(12, 3);

      lcd.print(counter, DEC);

      scnm = 0;

      sctl = 0;

      scn = 0;

      sct = 0;

      ndir = 1;

      sdir = 1;

      name = "";

      title = "";

    }

  }

}

void read_button()

{

  if (digitalRead(PLAY) == LOW && playPressed == false)

  {

    playPressed = true;

    playState = !playState;

    scnm = 0;

    sctl = 0;

    scn = 0;

    sct = 0;

    ndir = 1;

    sdir = 1;

    name = "";

    title = "";

    lcd.setCursor(16, 3);

    if (playState)

    {

      lcd.print("Play");

      Serial.print(100, DEC);

      Serial.print('\n');

    }

    else

    {

      lcd.print("Stop");

      Serial.print(101, DEC);

      Serial.print('\n');

    }

  }

  else if (playPressed == true && digitalRead(PLAY) == HIGH)

  {

    playPressed = false;

  }

}

/* returns change in encoder state (-1,0,1) */

int8_t read_encoder()

{

  static int8_t enc_states[] = {

    0,-1,1,0,1,0,0,-1,-1,0,0,1,0,1,-1,0    };

  static uint8_t old_AB = 0;

  old_AB <<= 2;                   //remember previous state

  old_AB |= ( ENC_PORT & 0x03 );  //add current state

  return (enc_states[( old_AB & 0x0f )]);

}