Flexible LCD driver

__SIMS · Joined: 23 Mar 2006 Posts: 1

I am having trouble getting any output on my LED when using the PIC18F8722... please help:

#include <18F8722.h>
#include "FLEX_LCD420.C"

void main()
{

lcd_init();

while(1)
{
output_high(PIN_F2);
delay_ms(1000);
output_low(PIN_F2);

printf(lcd_putc, "Hello World.");
lcd_putc("f");

delay_ms(1000);
}
}

The only change I made to the FLEX_LCD420.c was to change the appropriate pin connections I am using:

#define LCD_DB4 PIN_F4
#define LCD_DB5 PIN_F5
#define LCD_DB6 PIN_F6
#define LCD_DB7 PIN_F7

#define LCD_E PIN_F2
#define LCD_RS PIN_F0
#define LCD_RW PIN_F1

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

That's [spam]'s code. He's going to have to support it.
Just letting you know.

vitorego · Joined: 18 Apr 2006 Posts: 3

The flexible lcd code also works with powertip LCD modules with 16x2 and 5*8 dots?
I can´t configure this LCD manually with function sets and all this things.

noisepic · Joined: 24 Jul 2005 Posts: 20

I have used flex_lcd.c for Pic16F877A but it doesn't working. I don't know why. I used PORTB
RS PIN_B2
E PIN_B3
D4-D7 PIN_B4-PIN_B7

help me pls? or another code!!

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

Did you remember to include NOLVP in your fuses?

fuzzy · Joined: 26 Feb 2005 Posts: 64

Hi,

could you please tell me how can i write a variable value on this kind of LCD with these drivers??

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

lcd_putc() will display a single char.
You can redirect the printf command to the LCD by supplying this function name as the first parameter of the printf. Look at the help for printf to see an example.

TheNewHetfield · Joined: 13 Jun 2006 Posts: 1

It's a very useful code!!

I'm using it in a huge project, needing to optimize the use of the ports, and this code has become an excelent solution

Greetings from Santiago de Chile
Sergio

pdswar · Joined: 18 Jul 2006 Posts: 33 Location: Maryland, USA

I am a beginner to PIC programming and I am using PIC 18F6722 to drive NKK Smartswitch LCD.

http://www.nkksmartswitch.com/PDF/IS01NCF.pdf?

// As defined in the following structure the pin connection of Port F is as
// follows:
// F0 rs
// F1 rw
// F2 enable
// F3 LCD_LP
// F4 LCD_DOUT
// F5 LCD_BL
// Pins F6 and F7 are not connected

How can I modify flex_lcd.c to drive 36 X 24 pixel NKK Smartswitch LCD

treitmey · Joined: 23 Jan 2004 Posts: 1094 Location: Appleton,WI USA

Your going to have to write a whole new driver. This device is serial in nature, like a 74595/74165 see example ex_expio.c
http://www.nkksmartswitch.com/Uploads/DrivingSSPart1and2.pdf

And note that this is the wrong place to be asking for help.
see item 2.
http://www.ccsinfo.com/forum/viewtopic.php?t=27260
Ask for help in the main forum. This area is a place to share complete tested code.

javi.ar · Joined: 17 Feb 2006 Posts: 59 Location: Argentina

Sorry about this silly question but can anyone explain what are the meaning of this line

output_bit(LCD_DB4, !!(nibble & 1));

i think is putting on the PIN (#define LCD_DB4 PIN_D0) D0 one bit, so far so good, but what is !!, I cannot find out why do you need twice negative (nibble & 1) which I think is always the LSB of each byte...

Please clarify, and thanks in advance.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

There is a note in the source code which explains this:

jaime · Joined: 25 Nov 2005 Posts: 56 Location: Porto - Portugal

What i need to do to use it with 24x2 display??

Thanks

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

jaime · Joined: 25 Nov 2005 Posts: 56 Location: Porto - Portugal

In the silkscreen i have:
SII L2432 N11V0

There's some info in the net but i cannot find the site of the manufaturer...

Thanks

http://www.eio.com/l2432ap.htm