Storing Array in Non-volatile memory

David Elliott1

I am trying to store a 2D array in non-volatile memory. Each entry in the array will be a uint8 and the whole array will be of the size 50 rows by 10 columns. The process is that the client will write to a characteristic in my application with a array row and the 10 bytes of data and then my application will store this data in the appropriate row. Then I will need to read this data later in the program.

I am a bit confused on how to use the osal_snv_write function to do this. Do I call this function as I declare the 2D array or just when I set the values? What should be the parameter "id - Valid NV item Id"?

Would this work?

VOID osal_snv_write( 0x01, 10 , arrayrow1);

VOID osal_snv_write( 0x02, 10 , arrayrow2);

...

VOID osal_snv_write( 0x32, 10 , arrayrow50);

over 11 years ago

0 Maulik Vaghela over 11 years ago

Expert 2500 points

Valid NV item id is address in NV memory.

It should begin with 0x401.

Applications can use 0x401- 0xFFF addresses , which is mentioned in OSAL API guide. Thus in above codes just change address and it should work .

Easiest way is,

VOID osal_snv_write( 0x401, 500 , &array); // If you have continuous memory allocation.

0 David Elliott1 over 11 years ago in reply to Maulik Vaghela

Intellectual 295 points

That makes sense. What if I want to incrementally enter the data. So one 10 byte length at a time.

Will it be this:

VOID osal_snv_write( 0x401, 10 , &array1);

VOID osal_snv_write( 0x402, 10, &array2);

and so on...

Or:

VOID osal_snv_write( 0x401, 10 , &array1);

VOID osal_snv_write( 0x411, 10, &array2);

Thanks for your help.

0 Maulik Vaghela over 11 years ago in reply to David Elliott1

Expert 2500 points

Hi,

It'll be as follow as it is bytewise memory.

VOID osal_snv_write( 0x401, 10 , &array1);

VOID osal_snv_write( 0x411, 10, &array2);

Thanks.

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Storing Array in Non-volatile memory