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POHow to place variables in the access bank - PIC 18 MPASM linker script
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copied!<p>I have a linker script which starts</p> <pre><code> INCLUDE 18f14K50_g.lkr </code></pre> <p>I want my interrupt service variables to go into the ACCESS bank. (My program's so small at the moment the whole lot can, but maybe in future...). So</p> <pre><code> SECTION NAME=VarsModemISR RAM=accessram </code></pre> <p>which results in:</p> <pre><code>MPLINK 4.39, Linker Device Database Version 1.1 Copyright (c) 1998-2011 Microchip Technology Inc. Error - section 'VarsModemISR' has a memory 'accessram' which is not defined in the linker command file. Errors : 1 </code></pre> <p>Examining the included file I believe it is. Either that or I'm working in extended mode and "gpre" is. I can use an #IFDEF to check, which I tried. The result, it was trying to use "accessram" not "gpre".</p> <p>Maybe if I try defining the access bank explicitly by copying the line from the include file:</p> <pre><code>ACCESSBANK NAME=accessram START=0x0 END=0x5F SECTION NAME=VarsModemISR RAM=accessram </code></pre> <p>This results in the error</p> <pre><code>MPLINK 4.39, Linker Device Database Version 1.1 Copyright (c) 1998-2011 Microchip Technology Inc. Error - duplicate definition of memory 'accessram' Errors : 1 </code></pre> <p>Which has me confused. According to the Assembler/Linker documentation I use SECTION with the RAM option, where RAM has previously been declared using ACCESSBANK, SHAREBANK or DATABANK. It should work.</p> <p>Thanks - Richard</p>

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