Pat,

The CG ROM in the T6963 isn't the std ASCII  character addresses.  There is 
an offset of I believe 0z20 or something like that.  Check the datasheet for 
the exact addresses.


                                                                             
        Regards,

                                                                             
            Jim



----- Original Message ----- 
From: "Pat O'Toole" <pat@patotoole.net>
To: <piclist@mit.edu>
Sent: Sunday, February 10, 2008 8:44 AM
Subject: [PIC] problem with lm6270syl T6963C based LCD - CG-ROM doesnt work


> Hello all.
> I've got a good one here....[problem that is]
>
> Im workign with this 240x64 graphics lcd I purchased from eio.com
> I have all the wiring correct and it works in CG-RAM mode---
> when I upload my own characters...
>
> but when I use cg-rom (its internal char set)...I get 'characters'
> that dont look like anything...of this earth! :)
>
> Wondering if anyone else had a similar problem with one of these?
>
> Its my Solomon and uses the T6963C controller.
>
> Here are my init commands and what not:
>
> 03,00,22(c)                                - set CG-rom offset 1800-1FFF
> 80(c)                                         - or mode cg-rom mode
> 00,10,40(c)                                - set text home at 1000h
> 20,00,41(c)                                - set text row at 20h
> 00,00,24(c)                                - set pointer to 0000h
> 94(c)                                         - text on, graphics off, 
> cursor off, display now ON with garbage
> B0(c)                                        - start block mode with post 
> auto inc
> 00   .. 00                                   - send 8K off h'00' to clear 
> ram and screen
> B2(c)                                        - end block mode
> 00,1c,24(c)                               - set pointer to 1C00  start of 
> cg-ram (char 80)
> B0(c)                                        - start block mode with post 
> auto inc
> 00,1F,04,04,04,04,04,00            - set char 80h to  T
> 00,04,0E,15,04,04,04,00           -  set chat 81h to up arrow
> B2(c)                                        - end block mode
> 00,10,24(c)                               - set pointer to 1000 start of 
> text screen (now clear)
> B0(c)                                        - start block mode with post 
> auto inc
> xx                                            - send asci char - 20h bias 
> ....doesnt display correctly...
> 80                                            - correctly displays a T - 
> cg-ram char 80
> 81                                            - correctly displays up 
> arrow
> B2(c)                                        - end block mode
>
> I'm not checking status but for debugging I'm only sending one char a 
> SEC...so I know that a busy state isnt the issue.
>
> I say..
>
> 1)  I have the init string wrong?
> 2)  the t6963c is messed up
> 3)  the t6963c font is chinese or somrthing nuts
>
>
> tried upper case, lower case, and numbers.  NOTHING prints correctly 
> except for my own cg-ram.
>
> any thoughts?  anyone see this problem???
>
> HELP!
>
> Pat
> pat@patotoole.net
>
>
> -- 
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
> 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist