Storing variables at Battery back up RAM

Hi,

Do you mean to use something like mentioned in this link? http://www.keil.com/support/man/docs/ca/ca_ap_linkerloc.htm

If yes, then I am not very much sure about using the LA so I would like to summarize the steps below, would you please validate the same?

1. Define all those variables in single C file.
2. This will give segments defined for each variable in map file.
3. Then use such a line e.g. 'LA ... almctrl.obj SEGMENTS(?DT0?ALMCTRL(0x00108000)) ...' to define that segment in specific address.
4. But where should I place this line in KEIL? (Linker section of project options? )
5. Do I need to insert this line for every variable? Or can I just place the newly created file.o in battery backup area directly?

Please guide.

Thanks,
Prasad

Hi,

Do you mean to use something like mentioned in this link? http://www.keil.com/support/man/docs/ca/ca_ap_linkerloc.htm

If yes, then I am not very much sure about using the LA so I would like to summarize the steps below, would you please validate the same?

1. Define all those variables in single C file.
2. This will give segments defined for each variable in map file.
3. Then use such a line e.g. 'LA ... almctrl.obj SEGMENTS(?DT0?ALMCTRL(0x00108000)) ...' to define that segment in specific address.
4. But where should I place this line in KEIL? (Linker section of project options? )
5. Do I need to insert this line for every variable? Or can I just place the newly created file.o in battery backup area directly?

Please guide.

Thanks,
Prasad

HI.

<quote>
Do I need to insert this line for every variable?
</quote>

sorry i dont know the answer to it.

if u need it for evry variable and u have lot of variables it can be a lot of work.

but if u do u can put all yo're non volatile variables into a structure. and then u have one variable and only one adress.

Always yo're freind.

Zeusti.

Hi Prasad Deshpande,

Right-click on a Source File and select Options for File from the context menu to specify the properties and compiler or assembler options for that file.

specify the Memory Assignment

Hi Prasad Deshpande,

http://www.keil.com/support/man/docs/uv3/uv3_dg_property.htm

Memory Assignment

Only available for RealView ARM: assign a file or group to specify memory regions. Code/Const (RO), Zero Initialized Data (ZI), and standard data (RW) areas can be selected. Note that you should enter the available memory regions in the Target dialog and enable Use Memory Layout from Target Dialog in the Linker dialog.