Hello fellow piclisters,

        I am having trouble creating special characters with a standard
     14 pin LCD card and a PIC16F84.  I am using code derived from
     Peer's wonderful LCD pages, and the code is trying to create three
     special characters residing in CGRAM spaces 0x000, 0x001, and 0x002
     respectively.

        I understand that I must first initialize the LCD.  This has
     been done effectively.  Then select the special character RAM
     space. This is done with the following subroutine:

        MOVLW   0x000           ; set the first CGRAM value

     LCDSCGA
        ANDLW   0x03F
        IORLW   0x040
        CALL    LCDPUTCMD       ; this routine is from Peer (and works)

        Now as I understand it, I must write the eight bytes of segment
     information.  The location is incremented automatically via my
     initialization mode setup (also verifyed).

        MOVLW   0x01b           ; send the first byte of segment info
        CALL    LCDPUTCHAR      ; send the data to the LCD
                o
                o
                o
               (do this seven more times)

        At this point I assume that all data necessary to create my
     first special character resides at location 0x000 in the LCD RAM.
     To display this character I need to write it to the display. So
     first, set the LCD to display mode via the following subroutine:

     LCDSDDA
        IORLW   0x080   ;
        CALL    LCDPUTCMD       ;
        RETURN

        Then send my characters:

        MOVLW   0x000           ; location where my special character is
        CALL    LCDPUTCHAR      ;
                o
                o
                o

                (send more characters)

        My questions are: 1. Do I have it right, but misplaced a bug
     somewhere? Or: 2.  Have a got a concept wrong, which one, and what
     should it be?


     Thanks for the help,

     Tim Crist