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Putting bytes in rom in an easy human readable fashion

 
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asmallri



Joined: 12 Aug 2004
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Putting bytes in rom in an easy human readable fashion
PostPosted: Fri Oct 21, 2005 9:31 am     Reply with quote
Hi

I want to store data, such as IP addresses at a fixed location in program memory that is both in a human readable fashion and memory efficient.

In MPASM I would do this:
Code:

MIP   DB   230, 10, 10, 11   ; IP address 230.10.10.11


But DB is not supported by the CCS assembler.

I know I can do this in CCS but it is unreadable:
Code:

#rom MIP       = {230 | (10 <<8), 10 | (11 <<8)} // 230.10.10.11


Ideas welcome...
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Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!
Neutone



Joined: 08 Sep 2003
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PostPosted: Fri Oct 21, 2005 9:36 am     Reply with quote
It seems that MIP is a 2 16 bit variables. Why not 4 bytes?
asmallri



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PostPosted: Fri Oct 21, 2005 9:39 am     Reply with quote
Quote:
It seems that MIP is a 2 16 bit variables. Why not 4 bytes?


Because then the compiler consumes 8 bytes of rom space.
_________________
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http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!
PCM programmer



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PostPosted: Fri Oct 21, 2005 9:43 am     Reply with quote
You can use "#rom int8 address =" to store packed bytes. Example:
http://www.ccsinfo.com/forum/viewtopic.php?t=21184
asmallri



Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia

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PostPosted: Fri Oct 21, 2005 9:46 am     Reply with quote
PCM programmer wrote:
You can use "#rom int8 address =" to store packed bytes. Example:
http://www.ccsinfo.com/forum/viewtopic.php?t=21184


Thanks - much more readable. I searched old posts but obviously missed it.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!
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