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"RESERVED MEMORY" on debug mode

 
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eabir



Joined: 16 Aug 2010
Posts: 19

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"RESERVED MEMORY" on debug mode
PostPosted: Thu Dec 29, 2011 1:41 am     Reply with quote

Hello,

While debug the ccs code in MPLAB i got "RESERVED MEMORY" in the watch value area.
What is the general reason ? and how can i fix it?

It happens with PIC16F688 and PIC24H, i assume its general problem in memory definitions?
Ttelmah



Joined: 11 Mar 2010
Posts: 19553

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PostPosted: Thu Dec 29, 2011 2:31 am     Reply with quote

You don't say where this is.
If you look in the data for the ICD, _all_ chips have some resources that are used by the ICD. Normally at least one interrupt level, a couple of stack levels, a few bytes of RAM, and a few hundred bytes of ROM at the top of the memory space. The amount varies (a little) between chips.
There also is 'reserved memory' in quite a few chips. So (for example) the USB data frame is directly updated by the USB hardware, and is reserved, on USB chips.

Best Wishes
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Thu Dec 29, 2011 4:05 am     Reply with quote

Reserved memory may be also ICD reserved, if you didn't compile with the ICD option in effect, or you are using #device ICD, but CCS C isn't aware of the actual ICD memory allocation. Check the MPLAB ICD related help file and reserve extra memory, if necessary.
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