CC2540 Storing Data in Flash

Hi,

Check out the OSAL NV (OSAL API.PDF, section 10)

Where do I get the OSAL API.PDF ?

Hi,

Get to the BLE installation folder on your desktop/laptop -> documents -> osal.

Thanks for the information.

I tried to use osal_snv_write / osal_snv_read like described in section 11 using the id 0xf0 to read/write 4 Byte of data. But the read and write operations return NV_OPER_FAILED. Any idea what might be wrong?

Thanks for the help so far, I really appreciate it!

Hey,

I have never used the simple NV interface, so I can't tell you what's wrong there.

On the other hand, the OSAL NV interface works like a charm.
 

Here's an example of how to use this interface to write one byte variable to the NV memory and read it:

#define SOME_ID  0x401 // taken from Application unique IDs space (0x0401 - 0x0FFF) 

#define SOME_LEN sizeof(byte)

byte tmpWriteVar = 0xAA, tmpReadVar = 0;

if( osal_nv_item_init(SOME_ID, SOME_LEN, NULL) == SUCCESS )

osal_nv_write(SOME_ID, 0, SOME_LEN, &tmpWriteVar);

      :
      :

if( osal_nv_item_init(SOME_ID, SOME_LEN, NULL) == SUCCESS )

osal_nv_read(SOME_ID, 0, SOME_LEN, &tmpReadVar);

Yeah, I tried to use the NV System but I'm missing a OSAL_Nv.c file or library containing the functions. Any idea where to find those?

Hi,

In your simpleBLE... application .c file in the include area add #include "OSAL_NV.h"

this should do the trick...

That results in the following error:

Error[e46]: Undefined external "osal_nv_item_init::?relay" referred in led_sconce ( C:\Users\O.Mader\Desktop\testprojectC\Debug\Obj\led_sconce.r51 )
Error while running Linker

what is this led_sconce module?

Is this something that came with original project, or you added it later?

I just renamed the project, no big deal.

Odd.

Can you please tell describe me how exactly you were renaming this project?

Additionally, can you post a list of paths of "additional include directories",

Open project options -> C/C++ Compiler -> Preprocessor.

Also, what is the full path to the BLE installation folder? 

Ok,

then verify one of the answer to mark the thread as answered.

Hi Oliver, Igor,

I am running into the same error message. Could you kindly share what changes you made to the Linker Settings ?

Actually I was also looking for the osal_nv.c file in the 1.2 Stack but it does not seem to be included?
I assume this might be my issue. osal_nv.h is in the osal/include directory, but osal/mcu/2540 only has osal_snv.c.

If you could shed some light on this I would appreciate it. 

best regards,

Oliver.

great post,

I have a question about writing to flash.

I have a database which is an array of struct, every once in a while I copy the db I accumulated from the sensors which is located on the RAM to the flash.

So on the flash I have an item which is getting bigger and bigger as I add data to it.

My question is about osal_nv_item_init( uint16 id, uint16 len, void *buf ),  is the len should be the total length of the item in bytes ( so everytime I call osal_nv_item_init the len is different) ?

thanks

hi,i also encount same problem?  Undefined external "osal_nv_item_init::?relay" 

could you kindly post how to slove the problem.I cant find the link setting what you said.