gnupic: Table Read on PIC16C77
Subject:
Re: Table Read on PIC16C77
From:
David Kelly ####@####.####
Date:
27 Sep 2000 01:41:52 -0000
Message-Id: <200009270142.e8R1gWa19737@nospam.hiwaay.net>
Jerome Dumas writes:
> Dear All,
>
> How to control page crossing ?
Force the table to be located completely on one page at assembly/link
time.
> Here is what I have implemented :
>
> a macro that allows to manage crossing page according to AN556
> application note
> from microchip. (at the end, I increment my offset by 1)
>
> ; ********************************************************************
> CALL_TABLE_M macro table, offset
>
> movlw LOW table
> addwf offset, 1
> movlw HIGH table
> btfsc STATUS, C
> addlw 1
> movwf PCLATH
> incf offset, 0
> call table
> ENDM
> ; ********************************************************************
> The problem I have is when I call the table with the folowing
> instruction :
>
> CALL_TABLE_M mytable, 0x77
Why would you use such a macro with a constant offset? Or is this just
for the sake of an example?
--
David Kelly N4HHE, ####@####.####
=====================================================================
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