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LCD doesn't Display

 
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amjad_alahdal



Joined: 19 Feb 2013
Posts: 50

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LCD doesn't Display
PostPosted: Sat Feb 22, 2014 6:16 am     Reply with quote
Hello,
I am using a serial LCD as the following one :

https://www.sparkfun.com/products/9393

I was thinking of using the JP2 pins. So, it would be like the regular LCD.

I used the LCD library in the website and the following program:

Code:


#include <18f2455.h>

#FUSES HS,NOLVP,NOPROTECT,NOWDT,PUT
#USE DELAY(clock=16M)
#include "Flex_LCD216.c"


void main(void)
{

   delay_ms(4000);
      lcd_init();
   
   lcd_putc("\fHello World");
   delay_ms(2000);
   lcd_putc("\f");
   lcd_putc("Line Number 2");
   delay_ms(2000);
   while (TRUE)
   {
      output_BIT(PIN_A5,1);
      delay_ms(1000);
      lcd_putc("Hello world");
      delay_ms(1000);
      output_BIT(PIN_A5,0);
      delay_ms(1000);

   }
}






I am starting to think that it work if I use the JP2 Pins.

Does anyone know how the JP2 PINS work in this LCD ?
ezflyr



Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA

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PostPosted: Sat Feb 22, 2014 6:27 am     Reply with quote
Hi,

No, you absolutely cannot do that! If you connect directly to J2 then your PIC will be in parallel with the PIC on the serial LCD backpack. That is NOT going to work. Use the LCD as a serial LCD or get a standard LCD.

John
amjad_alahdal



Joined: 19 Feb 2013
Posts: 50

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PostPosted: Sat Feb 22, 2014 6:54 am     Reply with quote
Thank you
dyeatman



Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK

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PostPosted: Sat Feb 22, 2014 7:18 am     Reply with quote
Or remove the processor from the serial LCD board...then you can use JP2 Shocked
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