Olho de LCD com Arduino e Nokia 5110 - #sucesso

E... voilá!!

Consegui fazer o Olho de LCD usando um display Nokia 5110 e o Arduino!!!

De início eu havia pensado em gerar um arquivo bitmap (BMP) e convertê-lo depois em código usando uma ferramenta automatizada. Ou pelo menos foi o que eu escrevi que ia fazer no meu último post...

Acabei fazendo uma coisa bem diferente... Foi um trabalho mais braçal, mas deu certo.

Primeiro, marquei com uma canetinha vermelha as divisas das linhas do display, a cada 8 quadradinhos. O display recebe os dados a exibir na forma de bytes. Cada byte contém oito bits, então os dados chegam ao display na forma de linhas com oito bits de espessura. Foram essas linhas que marquei.

Para cada uma das 6 linhas, montei uma sequência de bytes. Para ficar bem claro no código, escrevi os bytes usando o sistema binário, assim:

0b00000000 //uma linha em branco
0b11111111 //uma linha preta

O "0b" no início diz ao Arduino que estou usando o sistema binário, ou seja, só zeros e uns.
Tive que escrever o correspondente de 0 ou 1 para cada quadradinho da grade que forma o display. Ou seja, 84 x 48 = 4032. Claro que usei um bocado de Ctrl + C, Ctrl + V e escrevi em linhas de 8 bits, então foram apenas 504 linhas de código para descrever o desenho... ;)
O código inteiro está aí embaixo, usem à vontade!

Se fizerem melhorias para ele olhar para os lados, piscar, etc, por favor compartilhem! Eu quero fazer isso também, mas se forem mais rápidos que eu, vai me poupar um bocado de trabalho!

Abraços!

//Olho de LCD - v1
//Controlador de Display LCD Nokia 5110 (84x48 pixels)
//em 31 de janeiro de 2014
//Mais informacoes: umcarneiro.blogspot.com
//Licenca: MIT (use como quiser!)

//Pinos utilizados no arduino
#define PIN_SCE   7  //pino 2 do display
#define PIN_RESET 6  //pino 1 do display
#define PIN_DC    5  //pino 3 do display
#define PIN_SDIN  4  //pino 4 do display
#define PIN_SCLK  3  //pino 5 do display

//Tamanho do LCD em pixels:
#define LCD_X     84
#define LCD_Y     48

byte linhaUm[84] = {
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //5
      0b00000000,
      0b00000001,
      0b00000010,
      0b00000100,
      0b00000100,  //10
      0b00001000,
      0b00001000,
      0b00010000,
      0b00100000,
      0b00100000,  //15
      0b00100000,
      0b01000000,
      0b01000000,
      0b01000000,
      0b01000000,  //20
      0b01000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //25
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //30
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //35
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //40
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //45
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //50
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //55
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,  //60
      0b10000000,
      0b10000000,
      0b10000000,
      0b10000000,
      0b01000000,  //65
      0b01000000,
      0b00100000,
      0b00100000,
      0b00010000,
      0b00010000,  //70
      0b00001000,
      0b00001000,
      0b00000100,
      0b00000010,
      0b00000010,  //75
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //80
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000
};

byte linhaDois[84] = {
      0b00000000,
      0b00000011,
      0b00001100,
      0b00110000,
      0b01000000,  //5
      0b10000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //10
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //15
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //20
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //25
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //30
      0b00000000,
      0b00000000,
      0b00000001,
      0b00000011,
      0b00000111,  //35
      0b00000111,
      0b00001111,
      0b00001111,
      0b00001110,
      0b00011110,  //40
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,  //45
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,  //50
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,
      0b00011111,  //55
      0b00011111,
      0b00011111,
      0b00011111,
      0b00001111,
      0b00001111,  //60
      0b00001111,
      0b00001111,
      0b00001111,
      0b00001111,
      0b00000111,  //65
      0b00000111,
      0b00000011,
      0b00000001,
      0b00000000,
      0b00000000,  //70
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //75
      0b00000000,
      0b10000000,
      0b01000000,
      0b00100000,
      0b00010000,  //80
      0b00001000,
      0b00000110,
      0b00000001,
      0b00000000
};

byte linhaTres[84] = {
      0b11111111,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //5
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //10
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //15
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //20
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //25
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00001111,  //30
      0b00111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //35
      0b10001111,
      0b00000111,
      0b00000111,
      0b00000011,
      0b00000011,  //40
      0b00000011,
      0b00000111,
      0b00001111,
      0b11111111,
      0b11111111,  //45
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //50
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //55
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //60
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //65
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b00111111,  //70
      0b00001111,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //75
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //80
      0b00000000,
      0b00000000,
      0b10000000,
      0b01111111
};

byte linhaQuatro[84] = {
      0b11111000,
      0b00000110,
      0b00000001,
      0b00000000,
      0b00000000,  //5
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //10
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //15
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //20
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //25
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b11100000,  //30
      0b11111000,
      0b11111100,
      0b11111111,
      0b11111111,
      0b11111111,  //35
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //40
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //45
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //50
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //55
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,  //60
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111001,
      0b11111001,  //65
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111111,
      0b11111110,  //70
      0111111000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //75
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //80
      0b00000000,
      0b00000000,
      0b00001111,
      0b11110000
};

byte linhaCinco[84] = {
      0b00000000,
      0b00000000,
      0b00000000,
      0b11000000,
      0b00110000,  //5
      0b00001100,
      0b00000010,
      0b00000001,
      0b00000000,
      0b00000000,  //10
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //15
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //20
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //25
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //30
      0b00000000,
      0b00000000,
      0b00000000,
      0b10000000,
      0b11000000,  //35
      0b11000000,
      0b11100000,
      0b11100000,
      0b11110000,
      0b11110000,  //40
      0b11110000,
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,  //45
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,  //50
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,  //55
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,
      0b11111000,  //60
      0b11110000,
      0b11110000,
      0b11110000,
      0b11110000,
      0b11100000,  //65
      0b11100000,
      0b11000000,
      0b11000000,
      0b10000000,
      0b00000000,  //70      
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //75
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000011,
      0b00000100,  //80
      0b00011000,
      0b01100000,
      0b10000000,
      0b00000000
};

byte linhaSeis[84] = {
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000,  //5
      0b00000000,
      0b00000000,
      0b00000000,
      0b10000000,
      0b01000000,  //10
      0b00100000,
      0b00010000,
      0b00010000,
      0b00001000,
      0b00001000,  //15
      0b00001000,
      0b00000100,
      0b00000100,
      0b00000100,
      0b00000010,  //20
      0b00000010,
      0b00000010,
      0b00000010,
      0b00000010,
      0b00000001,  //25
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //30
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //35
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //40
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //45
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //50
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //55
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000001,  //60
      0b00000001,
      0b00000001,
      0b00000001,
      0b00000010,
      0b00000010,  //65
      0b00000010,
      0b00000010,
      0b00000010,
      0b00000010,
      0b00000100,  //70
      0b00000100,
      0b00000100,
      0b00001000,
      0b00010000,
      0b00100000,  //75
      0b00100000,
      0b01000000,
      0b10000000,
      0b00000000,
      0b00000000,  //80
      0b00000000,
      0b00000000,
      0b00000000,
      0b00000000
};

void setup(void)
{
  pinMode(PIN_SCE, OUTPUT);   // Inicializa os pinos...
  pinMode(PIN_RESET, OUTPUT);
  pinMode(PIN_DC, OUTPUT);
  pinMode(PIN_SDIN, OUTPUT);
  pinMode(PIN_SCLK, OUTPUT);
  digitalWrite(PIN_RESET, LOW); //RESET no controlador
  digitalWrite(PIN_RESET, HIGH);
  LcdWrite(LOW, 0x21 );  // Function set: PD=0 (On); V=0 (Horizontal); H=1 (Extended instruction set)
  LcdWrite(LOW, 0xBA );  // Define o LCD Vop (Contraste). //XXXXXXXXXXXXXXX
  LcdWrite(LOW, 0x04 );  // Define o coeficiente de temperatura (??)
  LcdWrite(LOW, 0x14 );  // LCD bias mode 1:48  (??)
  LcdWrite(LOW, 0x20 );  // Function set: PD=0 (On); V=0 (Horizontal); H=0 (Basic instruction set)
  LcdWrite(LOW, 0x0C );  // Display control = 10 (Normal)
  
  limpaTela();
  
  desenhaLinha(linhaSeis);
  desenhaLinha(linhaCinco);
  desenhaLinha(linhaQuatro);
  desenhaLinha(linhaTres);
  desenhaLinha(linhaDois);
  desenhaLinha(linhaUm);   
}
  
void limpaTela(void) {
  //Percorre todas as posicoes
  for (int index = 0; index < LCD_X * LCD_Y / 8; index++)
  {
    LcdWrite(HIGH, 0);
  }
}

void desenhaLinha(byte linha[]) {
  //Percorre as colunas
  for (int coluna = 0; coluna < LCD_X; coluna++)
  {
    LcdWrite(HIGH, linha[coluna]);
  }
}


//Cuida da burocracia: envia o comando ou dado seguindo o protocolo do chip
void LcdWrite(byte dc, byte data)
{
  digitalWrite(PIN_DC, dc); //define se vai mandar dado ou comando
  digitalWrite(PIN_SCE, LOW); //ativa o chip para receber dados
  shiftOut(PIN_SDIN, PIN_SCLK, MSBFIRST, data); //envia um bit de cada vez, comecando pela esquerda
  digitalWrite(PIN_SCE, HIGH); //desativa o envio de dados
}

void loop(void)
{  
  //nada
}

Você pode ver todas as etapas deste projeto usando este link, ou clicando no marcador "olho_de_lcd", abaixo.