Arduino + ЖКИ МЭЛТ МТ10Т7-7

melt_mt10t7-7_example.ino

/* Example: MELT MT10T7-7 LCD display, directly connected to Arduino.
 * Display datasheet: http://www.melt.com.ru/docs/MT-10T7_8_9.pdf
 */

// Other pins: GND to GND; +E to 5V; V0, +L and -L are not necessary for example purposes.
#define PIN_WR1 3
#define PIN_WR2 2
#define PIN_A0 13
#define PIN_DB0 9
#define PIN_DB1 10
#define PIN_DB2 11
#define PIN_DB3 12

#define SEG_A 8
#define SEG_B 32
#define SEG_C 64
#define SEG_D 4
#define SEG_E 2
#define SEG_F 128
#define SEG_G 1
#define SEG_H 16

void setup() {
  pinMode(PIN_A0, OUTPUT);
  pinMode(PIN_WR1, OUTPUT);
  pinMode(PIN_WR2, OUTPUT);
  pinMode(PIN_DB0, OUTPUT);
  pinMode(PIN_DB1, OUTPUT);
  pinMode(PIN_DB2, OUTPUT);
  pinMode(PIN_DB3, OUTPUT);
  
  digitalWrite(PIN_WR1, LOW);
  digitalWrite(PIN_WR2, LOW);
}

void _write_dbs(byte nibble) {
  digitalWrite(PIN_DB0, nibble & 1 ? HIGH : LOW);
  digitalWrite(PIN_DB1, nibble & 2 ? HIGH : LOW);
  digitalWrite(PIN_DB2, nibble & 4 ? HIGH : LOW);
  digitalWrite(PIN_DB3, nibble & 8 ? HIGH : LOW);
}

void _write_wr() {
  digitalWrite(PIN_WR2, LOW);
  digitalWrite(PIN_WR1, HIGH);
  delayMicroseconds(5);
  digitalWrite(PIN_WR1, LOW);
}

void write_lcd_raw(byte addr, byte data) {
  _write_dbs(addr & 15);
  digitalWrite(PIN_A0, LOW);
  _write_wr();
  _write_dbs(data & 15);
  digitalWrite(PIN_A0, HIGH);
  _write_wr();
  _write_dbs((data >> 4) & 15);
  _write_wr();

  // Unnecessary cleanup
  digitalWrite(PIN_A0, LOW);
  _write_dbs(0);
}

static byte STR_HELLO[5] = {
  SEG_F | SEG_E | SEG_G | SEG_B | SEG_C,
  SEG_A | SEG_F | SEG_G | SEG_E | SEG_D,
  SEG_F | SEG_E | SEG_D,
  SEG_F | SEG_E | SEG_D,
  SEG_F | SEG_E | SEG_D | SEG_A | SEG_B | SEG_C
};

void loop() {
  for (int i = 0; i < 10; i++) {
    write_lcd_raw(i, 0);
  }
  delay(500);
  for (int i = 0; i < 10; i++) {
    write_lcd_raw(i, SEG_G);
    delay(100);
  }
  delay(1000);
  for (int i = 0; i < 10; i++) {
    write_lcd_raw(i, 0);
  }  

  int offset = 3;
  int dir = 1;
  
  while (1) {
    for (int i = 0; i < 5; i++) {
      write_lcd_raw(offset + i, STR_HELLO[i]);
    }
    if (offset > 0) { write_lcd_raw(offset - 1, 0); }
    if (offset < 5) { write_lcd_raw(offset + 5, 0); }
    
    delay(250);
    offset += dir;
    if (offset == 0 || offset == 5) { dir = -dir; }
  }
}