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8 x 24 LCD

 
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DanA



Joined: 15 Jul 2006
Posts: 2

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8 x 24 LCD
PostPosted: Sat Jul 15, 2006 12:19 pm     Reply with quote
Hello, this is my first post. I'm fairly new to electronics, have a 16F627A and had a flashing LED as a test, then was experimenting with driving 12v relays, now want to get an LCD working.

I have a 24 x 8 LCD - Info on these sites:
http://www.btinternet.com/~markd833/LCD/intro.htm
http://www.btinternet.com/%7Ee2one/lcd/lcd.htm
http://www.btinternet.com/~e2one/avrbrd/biglcd2.htm

I've only got TX connected to the LCD RX - I will not need to transfer the other way, and I have power to the LCD - now all I need is the code to get it talking.

My c skills leave a lot to be desired and most of what I have done already has been borrowing code from other code (best way to learn I think) along with the assistance of a friend over msn... who I think has blocked me as he is fed up of my ramblings and stupid (to an expert) questions.

Judging by what I have read, most LCDs have to have their own driver because of the varying size. LCD.h along with some others seem to be far more complicated than I had expected - because they seem to be aimed at non-serial ones with many more connections to the PIC.

I have been told that all I need to do is put:

Code:
#use rs232(baud=9600, xmit=PIN_B2)


then use printf (but I'm not sure how to do this)

Can anyone explain (in dumbest terms) what I need to do to start outputting to my LCD?

Thanks in advance for any help you can give me.

Dan
DanA



Joined: 15 Jul 2006
Posts: 2

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PostPosted: Sat Jul 15, 2006 5:16 pm     Reply with quote
http://ccsinfo.com/forum/viewtopic.php?t=25905

Found this, which looks like my setup. Doesn't seem to work for me though. Is there any reason it shouldn't work? I have made the necessary changes for my setup (clock speed, xmit pin, led pin) - My code:

Code:
#include <16F627A>
#device ADC=10
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, parity=N, xmit=PIN_B2, bits=8)

void main() {

      {
      output_high(PIN_A0); // LED ON
      printf("\r\n-----HELLO-----");
     
      delay_ms(1000);
      output_low(PIN_A0); // LED OFF
      } while(TRUE);
   
}


If there is no reason for this not to work, I will dismantle and re-check all connections
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Jul 15, 2006 6:20 pm     Reply with quote
1. What about the comment at the end of this thread ?
http://www.crystalfontz.com/forum/showthread.php?s=&threadid=3228

2. What type of PROM is installed on your LCD, per the links that you gave ?

3. Do you have the small MAX232 daughter board attached ?
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