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bogus out of ram error

 
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SteveK



Joined: 13 Nov 2005
Posts: 4

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bogus out of ram error
PostPosted: Sun Feb 26, 2006 10:21 pm     Reply with quote
Hi there,

I'm using PCWH 3.241. I have a program which compiles OK for the 16F874A. It reports 41% ROM, 68-72% RAM.

If I try and compile for the 16F877 (more ram and flash), I get a "Not enough ram for all variables" message

If I look at the 16F877 in the device editor, it appears to use all the ram in the chip.

Is this a known quirk? I can post the source code - is there an option for attaching a file to these posts?

Many thanks,
Steve Krenek
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Feb 26, 2006 10:35 pm     Reply with quote
Add the line shown in bold below:
Quote:

#include <16F877.H>
#device *=16
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

//=========================
void main()
{


while(1);
}
SteveK



Joined: 13 Nov 2005
Posts: 4

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PostPosted: Sun Feb 26, 2006 10:46 pm     Reply with quote
Works a treat!

Many thanks. Er... is this something that should be highlighted in the documentation somewhere?

Steve
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Feb 26, 2006 10:53 pm     Reply with quote
The "out of ram" question gets asked all the time on here.

CCS has the answer in the documentation, but it's buried in the FAQ:
http://www.ccsinfo.com/faq/

See item #3 in this FAQ question:
Quote:

Memory

Why does the compiler show less RAM than there really is ?
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