What is the code for making a text flash on LCD screen?

Projects Programming
1

Playing with my LCD, what is the code for flashing some written text on the LCD screen?

2

Something like this maybe ?

#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

void setup()
{
  lcd.begin(16, 2);
}

void loop()
{
  lcd.print("Some text");
  delay(500);
  lcd.clear();
  delay(500);
}
3

Ahh yeah, righto. I just thought there might be a command line for it already.

Next ?

The text I have displayed now, (just mucking around playing connect 4 with the kids is)

GAME SCORE
Peter Nicholas
0 1
Game On

Want to make the GAME SCORE flash for example.

That line of code you gave me would make the text flash as long as I repeat it.

But I only want the first line, or 2nd line, or line 1 and line 4 to flash only.

How would you do it then?

Can you have mini loop's going ie void loop for line 1 of text? Then normal then void loop for line 4 text?

Peter

4

Have a look at this for some ideas

#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

void setup()
{
  lcd.begin(16, 2);  
  lcd.setCursor(0,0);
  lcd.print("line 1");
  lcd.setCursor(0,1);
  lcd.print("line 2"); 
}

void loop()
{
  for (int count=0; count <= 5; count++)
  {
    lcd.setCursor(0,0);
    lcd.print("      ");
    delay(500);
    lcd.setCursor(0,0);
    lcd.print("line 1");
    delay(500);
  }

  for (int count=0; count <= 5; count++)
  {
    lcd.setCursor(0,1);
    lcd.print("      ");
    delay(200);
    lcd.setCursor(0,1);
    lcd.print("line 2");
    delay(200);
  }
}

There are better ways to do it but you will get the general idea.

5

Try this.

#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7,8,9,10,11,12);

void setup() {
  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("GAME SCORE");
}

void loop() {
  // Turn off the cursor:
  lcd.noDisplay();
  delay(250);// change for faster flash 
   // Turn on the cursor:
  lcd.display();
  delay(250);// change for faster flash
}
6

Is there really no function to display a portion of flashing text on LCD?

7

You can always write your own function. For example:

void FlashMessage(char *msg, int col, int row, int repeat)
{
  char temp[] = "                ";   // Enough spaces to fill one display line

  lcd.setCursor(col, row);
  lcd.print(msg);
  for (int i = 0; i < repeat; i++) {
    lcd.setCursor(col, row);
    lcd.print(temp);
    delay(PAUSE);
    lcd.setCursor(col, row);
    lcd.print(msg);
    delay(PAUSE);
  }
}

For example, you could use this:

#define PAUSE  500            // Set at top of source code file
// some code...

  FlashMessage("Game Score", 5, 0, 5);  // Set the message to column 5, row 0, and flash 5 times.

It would be more useful to also pass in the delay period rather than using the #define.

1 Like
8

Thank you very much, it will fit my need.

9

Thanks. very useful.