keyboard.ino

/*****************************************
 * copyright Andrea Battellocchi
 * email: yellowelise@gmail.com
 * 
 */
#include <M5Stack.h>

bool showkey = false;
char keymap[2][4][10] = {{{'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'}, {'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', '╝'}, {'z', 'x', 'c', 'v', 'b', 'n', 'm', '^', '<', ' '}, {'1', '2', '3', '4', '5', '6', '7', '8', '9', '0'}}, {{'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'}, {'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', '╝'}, {'Z', 'X', 'C', 'V', 'B', 'N', 'M', '^', '<', ' '}, {'<', '>', ',', '.', '-', '_', '+', '*', '/', '\\'}}};
int shift = 0;
int csel = 0;
int rsel = 0;
int ocsel = -1;
int orsel = -1;
String keystring;
String okeystring;



void keyboard() {
  if ((showkey) && ((csel != ocsel) || (rsel != orsel) || (keystring != okeystring)))
  {
    // M5.Speaker.tone(561, 40); //frequency 3000, with a duration of 200ms

    M5.Lcd.drawString("                                       ", 0, 80, 4);
    M5.Lcd.drawString(String(keystring), 0, 80, 4);

    int x, y;
    M5.Lcd.fillRect(0, 112, 320, 240, BLACK);
    for (int r = 0; r < 4; r++)
    {
      for (int c = 0; c < 10; c++)
      {
        x = (c * 32);
        y = (112 + (r * 32));
        if ((csel == c) && (rsel == r))
        {
          M5.Lcd.setTextColor(TFT_BLACK, TFT_WHITE);
          M5.Lcd.fillRect(x, y, 32, 32, WHITE);
        }
        else
        {
          M5.Lcd.setTextColor(TFT_GREEN, TFT_BLACK);
          M5.Lcd.drawRect(x, y, 32, 32, BLUE);
        }
        M5.Lcd.drawString(String(keymap[shift][r][c]), x + 10, y + 7, 2);


      }
    }
    ocsel = csel;
    orsel = rsel;
  }
}


void setup(void) {
  M5.begin();
  Wire.begin();
  M5.Lcd.fillScreen(TFT_BLACK);
  M5.Lcd.setTextSize(1);
  M5.Lcd.setTextColor(TFT_GREEN, TFT_BLACK);
  M5.Lcd.setBrightness(100);
}







void loop() {

  if (showkey)
  {
    if (M5.BtnA.wasReleased())
    {
      csel = csel + 1;
      if (csel > 9)
      {
        csel = 0;
      }
    }
    if (M5.BtnC.wasReleased())
    {
      rsel = rsel + 1;
      if (rsel > 3)
      {
        rsel = 0;
      }
    }

    if (M5.BtnB.pressedFor(1000))
    {
      showkey = false;
      M5.Lcd.clear();

    }
    else if (M5.BtnB.wasReleased())
    {
      if ((rsel == 2) && (csel == 7))
      {
        shift++;
        if (shift > 1)
          shift = 0;

        csel = 0;
        rsel = 0;
      }
      else if ((rsel == 2) && (csel == 8))
      {
        int len = keystring.length();
        keystring = keystring.substring(0, len - 1);
      }
      else
        keystring += keymap[shift][rsel][csel];
    }


    keyboard();
    okeystring = keystring;

  }
  else
  {


    if (M5.BtnA.pressedFor(700))
    {
      showkey = !showkey;
      M5.Speaker.tone(661, 120); //frequency 3000, with a duration of 200ms
    }


  }
  delay(1);
  M5.update();
}