ubitx-v5d-xcvr/ubitx_20/ubitx_ui.ino

/**
 * The user interface of the ubitx consists of the encoder, the push-button on top of it
 * and the 16x2 LCD display.
 * The upper line of the display is constantly used to display frequency and status
 * of the radio. Occasionally, it is used to provide a two-line information that is 
 * quickly cleared up.
 */


/*
const PROGMEM uint8_t meters_bitmap[] = {
  B10000,  B10000,  B10000,  B10000,  B10000,  B10000,  B10000,  B10000 ,   //custom 1
  B11000,  B11000,  B11000,  B11000,  B11000,  B11000,  B11000,  B11000 ,   //custom 2
  B11100,  B11100,  B11100,  B11100,  B11100,  B11100,  B11100,  B11100 ,   //custom 3
  B11110,  B11110,  B11110,  B11110,  B11110,  B11110,  B11110,  B11110 ,   //custom 4
  B11111,  B11111,  B11111,  B11111,  B11111,  B11111,  B11111,  B11111 ,   //custom 5
  B01000,  B11100,  B01000,  B00000,  B10111,  B10101,  B10101,  B10111     //custom 6
};
*/

//SWR GRAPH,  DrawMeter and drawingMeter Logic function by VK2ETA 

#ifdef OPTION_SKINNYBARS //We want skninny bars with more text
//VK2ETA modded "Skinny" bitmaps
const PROGMEM uint8_t meters_bitmap[] = {
  //  B01110, B10001, B10001, B11111, B11011, B11011, B11111, B00000, //Padlock Symbol, for merging. Not working, see below
  B00000, B00000, B00000, B00000, B00000, B00000, B00000, B10000, //shortest bar
  B00000, B00000, B00000, B00000, B00000, B00000, B00100, B10100,
  B00000, B00000, B00000, B00000, B00000, B00001, B00101, B10101,
  B00000, B00000, B00000, B00000, B10000, B10000, B10000, B10000,
  B00000, B00000, B00000, B00100, B10100, B10100, B10100, B10100,
  B00000, B00000, B00001, B00101, B10101, B10101, B10101, B10101, //tallest bar
  B00000, B00010, B00111, B00010, B01000, B11100, B01000, B00000, // ++ sign
};
#else
//VK2ETA "Fat" bars, easy to read, with less text
const PROGMEM uint8_t meters_bitmap[] = {
  //  B01110, B10001, B10001, B11111, B11011, B11011, B11111, B00000, //Padlock Symbol, for merging. Not working, see below
  B00000, B00000, B00000, B00000, B00000, B00000, B00000, B11111, //shortest bar
  B00000, B00000, B00000, B00000, B00000, B00000, B11111, B11111,
  B00000, B00000, B00000, B00000, B00000, B11111, B11111, B11111,
  B00000, B00000, B00000, B00000, B11111, B11111, B11111, B11111,
  B00000, B00000, B00000, B11111, B11111, B11111, B11111, B11111,
  B00000, B00000, B11111, B11111, B11111, B11111, B11111, B11111, //tallest bar
  B00000, B00010, B00111, B00010, B01000, B11100, B01000, B00000, // ++ sign
};
#endif //OPTION_SKINNYBARS
PGM_P p_metes_bitmap = reinterpret_cast<PGM_P>(meters_bitmap);

const PROGMEM uint8_t lock_bitmap[8] = {
  0b01110,
  0b10001,
  0b10001,
  0b11111,
  0b11011,
  0b11011,
  0b11111,
  0b00000};
PGM_P plock_bitmap = reinterpret_cast<PGM_P>(lock_bitmap);


// initializes the custom characters
// we start from char 1 as char 0 terminates the string!
void initMeter(){
  uint8_t tmpbytes[8];
  byte i;

  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(plock_bitmap + i);
  LCD_CreateChar(0, tmpbytes);
  
  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i);
  LCD_CreateChar(1, tmpbytes);

  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 8);
  LCD_CreateChar(2, tmpbytes);
  
  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 16);
  LCD_CreateChar(3, tmpbytes);
  
  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 24);
  LCD_CreateChar(4, tmpbytes);
  
  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 32);
  LCD_CreateChar(5, tmpbytes);
  
  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 40);
  LCD_CreateChar(6, tmpbytes);

  for (i = 0; i < 8; i++)
    tmpbytes[i] = pgm_read_byte(p_metes_bitmap + i + 48);
  LCD_CreateChar(6, tmpbytes);
}


//by KD8CEC
//0 ~ 25 : 30 over : + 10
/*
void drawMeter(int needle) {
  //5Char + O over
  int i;

  for (i = 0; i < 5; i++) {
    if (needle >= 5)
      lcdMeter[i] = 5; //full
    else if (needle > 0)
      lcdMeter[i] = needle; //full
    else  //0
      lcdMeter[i] = 0x20;
    
    needle -= 5;
  }

  if (needle > 0)
    lcdMeter[5] = 6;
  else
    lcdMeter[5] = 0x20;
}
*/
//VK2ETA meter for S.Meter, power and SWR
void drawMeter(int needle) 
{
#ifdef OPTION_SKINNYBARS
  //Fill buffer with growing set of bars, up to needle value
  for (int i = 0; i < 6; i++) {
    if (needle > i)
      lcdMeter[i / 3] = byte(i + 1); //Custom characters above
    else if (i == 1 || i == 4) {
      lcdMeter[i / 3] = 0x20; //blank
    }
  }
#else //Must be "fat" bars
  //Fill buffer with growing set of bars, up to needle value
  for (int i = 0; i < 6; i++) {
    if (needle > i)
      lcdMeter[i] = byte(i + 1); //Custom characters above
    else
      lcdMeter[i] = 0x20; //blank
  }
  if (needle > 7) {
    lcdMeter[6] = byte(7); //Custom character "++"
  } else if (needle > 6) {
    lcdMeter[6] = 0x2B; //"+"
  } else lcdMeter[6] = 0x20;
#endif //OPTION_FATBARS
}



 char byteToChar(byte srcByte){
  if (srcByte < 10)
    return 0x30 + srcByte;
 else
    return 'A' + srcByte - 10;
}

//returns true if the button is pressed
int btnDown(void){
  if (digitalRead(FBUTTON) == HIGH)
    return 0;
  else
    return 1;
}

int enc_prev_state = 3;

/**
 * The A7 And A6 are purely analog lines on the Arduino Nano
 * These need to be pulled up externally using two 10 K resistors
 * 
 * There are excellent pages on the Internet about how these encoders work
 * and how they should be used. We have elected to use the simplest way
 * to use these encoders without the complexity of interrupts etc to 
 * keep it understandable.
 * 
 * The enc_state returns a two-bit number such that each bit reflects the current
 * value of each of the two phases of the encoder
 * 
 * The enc_read returns the number of net pulses counted over 50 msecs. 
 * If the puluses are -ve, they were anti-clockwise, if they are +ve, the
 * were in the clockwise directions. Higher the pulses, greater the speed
 * at which the enccoder was spun
 */

byte enc_state (void) {
    return (analogRead(ENC_A) > 500 ? 1 : 0) + (analogRead(ENC_B) > 500 ? 2: 0);
}

int enc_read(void) {
  int result = 0; 
  byte newState;
  int enc_speed = 0;
  
  unsigned long start_at = millis();
  
  while (millis() - start_at < 50) { // check if the previous state was stable
    newState = enc_state(); // Get current state  
    
    if (newState != enc_prev_state)
      delay (1);
    
    if (enc_state() != newState || newState == enc_prev_state)
      continue; 
    //these transitions point to the encoder being rotated anti-clockwise
    if ((enc_prev_state == 0 && newState == 2) || 
      (enc_prev_state == 2 && newState == 3) || 
      (enc_prev_state == 3 && newState == 1) || 
      (enc_prev_state == 1 && newState == 0)){
        result--;
      }
    //these transitions point o the enccoder being rotated clockwise
    if ((enc_prev_state == 0 && newState == 1) || 
      (enc_prev_state == 1 && newState == 3) || 
      (enc_prev_state == 3 && newState == 2) || 
      (enc_prev_state == 2 && newState == 0)){
        result++;
      }
    enc_prev_state = newState; // Record state for next pulse interpretation
    enc_speed++;
    delay(1);
  }
  return(result);
}