I have done some experiments in the meantime:
In order to use literals instead of hex, I have added 0x20 to my values and =

could so put them into the table as literals.
of course this means I have to subtract 0x20 when I look the values up.
This worked - in MPLAB SIM as well as in the target board.
The drawback is, I dont have all hex values from 0x00 to 0xff available, =

which I need for the system.
but it showed that the code works.

Next I used the (Hex values + 0x20) in the table as hex
That worked too.

Next I went back to the original values in hex, which gave me the error in =

the simulator again.

to better ilustrate it, here are the tables:

;PAGA_table   ; testtable 2: Literal values are plus 0x20
;  data "r!q  "
;  data "r!q!0"
;  data "r!r#@"
;  data "r!r$P"

PAGA_table   ; testtable 1: Hex values are plus 0x20
 db 0x72, 0x21, 0x71, 0x20, 0x20
 db 0x72, 0x21, 0x71, 0x21, 0x30
 db 0x72, 0x21, 0x72, 0x23, 0x40
 db 0x72, 0x21, 0x72, 0x24, 0x50

;PAGA_table   ; table with correct values
; db 0x52, 0x01, 0x51, 0x00, 0x00
; db 0x52, 0x01, 0x51, 0x01, 0x10
; db 0x52, 0x01, 0x52, 0x03, 0x20
; db 0x52, 0x01, 0x52, 0x04, 0x30

And here is the code which uses the table. Note that the lines where I =

subtract 0x20 are comented out. The code worked with these lines, as well a=
s =

without.

the program reads data from a serial bus (4 values) and compares them with =

the first 4 values of each line in the table. If all 4 values compare true, =

the 5th value is used to select a line from a different table and display i=
t =

on the LCD.

Lembit

BusPr=FCfen
;-----------------
 movlw UPPER my_table
 movwf TBLPTRU
 movlw HIGH my_table
 movwf TBLPTRH
 movlw LOW my_table
 movwf TBLPTRL
 movf ptr_pos,W
 addwf TBLPTRL,F
 clrf WREG
 addwfc TBLPTRH,F
 addwfc TBLPTRU,F
;-----------------
 movlw 0x20
 movwf sub20
 movlw .0
 movwf ptr_pos
nextAddress
 movlw UPPER PAGA_table
 movwf TBLPTRU
 movlw HIGH PAGA_table
 movwf TBLPTRH
 movlw LOW PAGA_table
 movwf TBLPTRL
 movf ptr_pos,W
 addwf TBLPTRL,F
 clrf WREG
 addwfc TBLPTRH,F
 addwfc TBLPTRU,F
 tblrd *+
 movf TABLAT, W
; movf sub20, W
; subwf TABLAT, 0
 cpfseq PAdr1
 goto IncAddress
 tblrd *+
 movf TABLAT, W
; movf sub20, W
; subwf TABLAT, 0
 cpfseq PAdr2
 goto IncAddress
 tblrd *+
 movf TABLAT, W
; movf sub20, W
; subwf TABLAT, 0
 cpfseq GAdr1
 goto IncAddress
 tblrd *+
 movf TABLAT, W
; movf sub20, W
; subwf TABLAT, 0
 cpfseq GAdr2
 goto IncAddress
 tblrd *+
 movf TABLAT, W
; movf sub20, W
; subwf TABLAT, 0
 movwf ptr_pos
 call my_char_1
 return
IncAddress
 movf dataPoint, W
 addwf ptr_pos, 1
 movf ptr_pos, W
 cpfseq dataLines
 goto nextAddress
 return
;-----------------------------
----- Original Message ----- =

From: "Tamas Rudnai" <tamas.rudnai@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Thursday, September 07, 2006 3:23 PM
Subject: Re: [PIC] defining data in Program Memory


Try to include that part of the program that uses the PAGA table... we do
not need all the code, but if you want you can attach it to the mail or put
it someware were we could take a look at, but from this snippet we do not
see how do you use the table.

Tamas



-- =

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