LCD 1602 Scroll text (Line 1 static, Line 2 Scrolling)

A simple project from a Arduino newbie

Apr 11, 2020

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Devices & Components

Arduino Uno Rev3

RGB Backlight LCD - 16x2

Rotary potentiometer (generic)

Project description

Code

Arduino IDE Code

arduino

Display one static line "Sing Along" and one scrolling line, on a LCD 16x2

1#include <LiquidCrystal.h>
2//                BS  E  D4 D5  D6 D7
3LiquidCrystal  lcd(7, 8, 9, 10, 11, 12);
4char * messagePadded = "                Twinkle Twinkle  Little star how I wonder what you are, up above the world so high, like a diamond  in the sky.                ";
5
6void setup()
7{
8  lcd.begin (16, 2);
9  lcd.setCursor(3, 0);
10  lcd.print("Sing Along");
11}
12
13void loop()
14{
15  for (int letter = 0; letter <= strlen(messagePadded) - 16; letter++) //From 0  to upto n-16 characters supply to below function
16  {
17    showLetters(0, letter);
18  }
19}
20
21void showLetters(int printStart, int startLetter)
22{
23  lcd.setCursor(printStart,  1);
24  for (int letter = startLetter; letter <= startLetter + 15; letter++) //  Print only 16 chars in Line #2 starting 'startLetter'
25  {
26    lcd.print(messagePadded[letter]);
27  }
28  lcd.print(" ");
29  delay(250);
30}

#include <LiquidCrystal.h>
//                BS  E  D4 D5  D6 D7
LiquidCrystal  lcd(7, 8, 9, 10, 11, 12);
char * messagePadded = "                Twinkle Twinkle  Little star how I wonder what you are, up above the world so high, like a diamond  in the sky.                ";

void setup()
{
  lcd.begin (16, 2);
  lcd.setCursor(3, 0);
  lcd.print("Sing Along");
}

void loop()
{
  for (int letter = 0; letter <= strlen(messagePadded) - 16; letter++) //From 0  to upto n-16 characters supply to below function
  {
    showLetters(0, letter);
  }
}

void showLetters(int printStart, int startLetter)
{
  lcd.setCursor(printStart,  1);
  for (int letter = startLetter; letter <= startLetter + 15; letter++) //  Print only 16 chars in Line #2 starting 'startLetter'
  {
    lcd.print(messagePadded[letter]);
  }
  lcd.print(" ");
  delay(250);
}

Arduino IDE Code

arduino

Display one static line "Sing Along" and one scrolling line, on a LCD 16x2

1#include <LiquidCrystal.h>
2//                BS  E  D4 D5  D6 D7
3LiquidCrystal   lcd(7, 8, 9, 10, 11, 12);
4char * messagePadded = "                Twinkle Twinkle   Little star how I wonder what you are, up above the world so high, like a diamond   in the sky.                ";
5
6void setup()
7{
8  lcd.begin (16, 2);
9   lcd.setCursor(3, 0);
10  lcd.print("Sing Along");
11}
12
13void loop()
14{
15   for (int letter = 0; letter <= strlen(messagePadded) - 16; letter++) //From 0   to upto n-16 characters supply to below function
16  {
17    showLetters(0, letter);
18   }
19}
20
21void showLetters(int printStart, int startLetter)
22{
23  lcd.setCursor(printStart,   1);
24  for (int letter = startLetter; letter <= startLetter + 15; letter++) //   Print only 16 chars in Line #2 starting 'startLetter'
25  {
26    lcd.print(messagePadded[letter]);
27   }
28  lcd.print(" ");
29  delay(250);
30}

#include <LiquidCrystal.h>
//                BS  E  D4 D5  D6 D7
LiquidCrystal   lcd(7, 8, 9, 10, 11, 12);
char * messagePadded = "                Twinkle Twinkle   Little star how I wonder what you are, up above the world so high, like a diamond   in the sky.                ";

void setup()
{
  lcd.begin (16, 2);
   lcd.setCursor(3, 0);
  lcd.print("Sing Along");
}

void loop()
{
   for (int letter = 0; letter <= strlen(messagePadded) - 16; letter++) //From 0   to upto n-16 characters supply to below function
  {
    showLetters(0, letter);
   }
}

void showLetters(int printStart, int startLetter)
{
  lcd.setCursor(printStart,   1);
  for (int letter = startLetter; letter <= startLetter + 15; letter++) //   Print only 16 chars in Line #2 starting 'startLetter'
  {
    lcd.print(messagePadded[letter]);
   }
  lcd.print(" ");
  delay(250);
}

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