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IAR to CCS

 
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bjerkely12



Joined: 04 May 2006
Posts: 5

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IAR to CCS
PostPosted: Tue May 09, 2006 1:27 pm     Reply with quote
Hi friends,
I'm trying to convert some IAR code to CCS and have confusions with data declarations.For example what can I use in CCS for

__eeprom __no_init <identifier> ;


Thanx in advance,
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Tue May 09, 2006 2:19 pm     Reply with quote
What does __eeprom __no_init do?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue May 09, 2006 2:46 pm     Reply with quote
See page 14 in this IAR reference guide:
http://www.ee.oulu.fi/~terva/Embedded2003/pdf/cavr.pdf
(The official IAR download page at http://www.iar.com/ is too slow)

Use the CCS typemod directive to do this. In the March 2006
CCS manual, see page 87 (in the Acrobat reader) for an example.
Download the CCS manual from this page:
http://www.ccsinfo.com/downloads.php
bjerkely12



Joined: 04 May 2006
Posts: 5

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PostPosted: Wed May 10, 2006 5:18 pm     Reply with quote
In CCS manual it says that pointer to constand is not allowed ,ok but how can I handle this

const char *str;
PCM programmer



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PostPosted: Wed May 10, 2006 5:31 pm     Reply with quote
You could have a global array in RAM, and copy a string into it
by using the CCS strcpy() function and then pass the address
of the RAM array to your function. Example:
Code:

#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)

char const msg1[]= {"Hello World"};
char const msg2[]= {"ABCD"};
char const msg3[]= {"Last message"};

char string_buffer[96];

void display_message(char *ptr)
{
printf("%s\n\r", ptr);
}

//===========================
void main()
{
strcpy(string_buffer, msg1);
display_message(string_buffer);

strcpy(string_buffer, msg2);
display_message(string_buffer);

strcpy(string_buffer, msg3);
display_message(string_buffer);

while(1);
}
 
 


Also see this post which uses the switch-case method to work around
the problem of no pointers to constant strings:
http://www.ccsinfo.com/forum/viewtopic.php?t=25483&start=7
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