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USE THE 8k programe memory

 
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WASSIM



Joined: 01 Apr 2008
Posts: 5

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PostPosted: Sat Apr 05, 2008 2:27 am     Reply with quote
yes when I use more memory program a error message appear:" out of rom,the segment or the program is too large Main".
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Apr 05, 2008 9:57 am     Reply with quote
Quote:
out of rom,the segment or the program is too large Main".

In CCS, a function can't be larger than a ROM page. For the 16F877,
a ROM page is 2048 words. The solution is to break up the code in
main() and put some of it into functions. Then call those functions from
main(). This will allow the compiler to put those functions into other
ROM segments, and you won't get the "out of rom" error anymore.
Example:
Code:

void func1(void)
{
// code
}

void func2(void)
{
// code
}

//====================
void main(void)
{
// Initial main code goes here.

// Put some of the main() code into these functions.
func1();
func2();
// or more.

// Other main code goes here.

while(1);
}
rnielsen



Joined: 23 Sep 2003
Posts: 852
Location: Utah

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PostPosted: Mon Apr 07, 2008 8:55 am     Reply with quote
There have been several posts regarding this error. Do a search on 'out of rom' and you should find the answers you are looking for.

Ronald
WASSIM



Joined: 01 Apr 2008
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PostPosted: Mon Apr 07, 2008 10:23 am     Reply with quote
also you must add #separate before the main function
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