How to make the text blink on LCD

[VRL_15]

Is there any way I can make the displayed text blink?

I am using PIC16f887

Thanks

 

[birdman0_o]

The same way you would flash an LED. Write all the text, delay, write all blank, delay, repeat.

 

[Mickster]

Assuming it might be a HD44780 display, could the control codes 08 & 0C be used from the table in the link below?
HD44780 Commands

 

[Ian Rogers]

Mickster!! I'm glad you suggested that. I was going to post display ON /OFF but after my last few posts I kinda wait a bit..

Ian

 

[birdman0_o]

Thought of that but, if contrast isn't perfect it might look a little funky IMO.

 

[Mickster]

Mickster!! I'm glad you suggested that. I was going to post display ON /OFF but after my last few posts I kinda wait a bit..

Ian

My question was posed due to ignorance on my part.
However, I have just found another suggestion here - 2nd post by 'ossi':
**broken link removed**
"Perhaps it would be possible to toggle the LCD-contrast-voltage-input."

 

[ghostman11]

useful link mikster thanks for that

 

[VRL_15]

i still couldn't make the text blink despite your suggestions

 

[Mickster]

Which type of LCD are you using and can you post your code for review?

 

[cobra1]

I make text blink by using the above method
Heres how i would do it

(LOOP) write text (i.e "Hello", delay, write blanks i.e " ", delay (LOOP)

 

[Mickster]

Is there any merit to the method of simply toggling the contrast supply?

Anyone else tried it?

 

[birdman0_o]

i still couldn't make the text blink despite your suggestions

Please elaborate.

 

[Mickster]

Please elaborate.

....and clarify which type of LCD you are using, along with the programming language......and your code ;-)

 

[cobra1]

toggling the contrast wouldnt work very well, this will clear the entire screen, it is not a good idea when wanting to make certain text flash.

 

[Mickster]

toggling the contrast wouldnt work very well, this will clear the entire screen, it is not a good idea when wanting to make certain text flash.

Gotcha....wouldn't work for let's say one line static and the other flashing, but if someone wanted the whole screen to flash....a simple solution?

 

[VRL_15]

I am using Assembly language

Its a LUMEX LCD

LCM-S01602DSF/A

Still not figured out the blinking text

 

[VRL_15]

I have configured a port such that as soon as the port bit is set I display a number on the LCD

I have displayed the number correctly

I need to make that number blinking

Part of the relevant code is as follows:

movlw 0x8A
movwf PORTD
call SND_CMD //SND_CMD is writing command to LCD

movf count304,0
movwf PORTD
call SND_DTA //SND_DTA is writing data to LCD

It works fine

Just that somehow I need to make that counter value blink

I tried using the control codes 0x08 and 0x0C but to no effect

If anyone has an idea please let me know

Thanks

 

[birdman0_o]

No effect means nothing to us. Please post your complete code. Please use code tags.

 

[VRL_15]

i have posted the relevant code

i did not save the code i tried using control codes since it didn't work

 

[VRL_15]

i tried to turn on visible blinking block cursor by the control code 0x0F

but it doesn't work too.

I see no cursor at all

movlw 0x8A
movwf PORTD
call SND_CMD //SND_CMD is writing command to LCD

movlw 0x0F
movwf PORTD
call SND_DTA //SND_DTA is writing data to LCD