Yes, I had thought of the FILL directive, but due to the nature of the code
(tables, code spread over 4 pages) I would need to put in quite a few.  I
was wondering if their was a more elegant way of doing this using MPASM.

I am implementing code to reprogram the microcontroller remotely, and I want
to generate a hex file that will set all unused program words to 0x0000.
This way I can determine if the code was loaded in the field (since the
unused portions contain 0x0000), or if it was loaded at the factory (where
unused portions will contain 0x3FFF).

-----Original Message-----
From: Pendley, Michael [mailto:mycall@SANDIA.GOV]
Sent: March 12, 2002 5:58 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: filling unused program memory


Using what assembler or compiler?

If you are using MPASM (and I am new to this so be gentile if I am
wrong)...how about the "fill" directive.

From the MPASM help file:  <label> fill <expr>, count

Generates <count> occurrences of the program word .... <expr>

If you used this after the last real instruction in your program then
<label> will have the value of the first location you want to zero.  The
last address depends on the processor type but is certainly known in
advance.  Call it lastProgramAddress.

I assume something like this would work

ZeroFill: fill 0,lastProgramAddress - ZeroFill + 1




-Mike



-----Original Message-----
From: Terence Monteith [mailto:Terence.Monteith@WAVECOM.CA]
Sent: March 12, 2002 3:55 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PIC]: filling unused program memory


I would like to fill in unused portions of the program memory with a
specific value (0x0000), but am unsure how this can be done without
tediously inserting the values manually or by using FILL directives
throughout the code.  Using a FILL directive at the very beginning of code
of course will give me overwrite errors when compiled.  Any suggestions?

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