[Mspgcc-users] NV data area creation

[Vladimir V. <vla...@de...>]

Hi all
First to answer my own querry from 21/7/2K3 regarding the problem with =
MSP430-insight.exe stoped working.=20
To cut the long story short...there was an alledged missmatch between =
XP, cygwin and mspgcc-20030506.exe ( cygwin1.dll wasn't the issue.....). =

Brute solution in my case was to remove the whole cygwin and than =
install 20030506 exe clean. Insight.exe GUI worked ( and still works) as =
intended. (Didn't have time to find exactly what the problem is.....)

New "problem":
Looks like my application ( with x449) will need a possibly large =
address translation table which is changing dynamicaly ( reguired to =
work with Samsung NAND-Flash and his bad blocks..) and should be =
retained between code reloads.
I am aware of __attribute__ ((section(".noinit"))) but will like to =
avoid copying into RAM because of size reasons.
I was also experimenting with __attribute__ ((section (".arbitrary =
name"))) and locating that into Information Memory segment A ( 0x1080) =
for example. That was loaded with CSPY and Erase Only Main mem ( not the =
Info mem) before download option. It looks like that puts zeros into =
area of choice ( or initial value if provided in the code...) on every =
reload instead of retaining the area intact?
Looks like I need to modify the Linker Script (msp430x449.x..etc..) and =
/or make my own loader but I am not shore on details ( reading the docs =
at the moment...).

Any advice / hint / recomendation on how to have NV area in the FLASH =
without RAM usage which is fully accesible from the code and retainable =
between code reloads is highly appreciated at this point !!!!!!

Thanks & Regards



Vladimir Voroncov
System/Software Engineer
Design2000 Pty. Ltd.
9-11 Rose Street PO Box 7020
Upper Ferntree Gully
Melbourne Victoria 3156
Australia

Phone: -61-(0)3-9758-5933
Fax:     -61-(0)3-9758-7279
Mobile: 0407-766-569
Email: vla...@de...