CC2538: OSAL NV READ

Raghunandana DS

Part Number: CC2538

Hi,

I am trying to read the data from the NV Memory that I only write. But I was not getting full data please look at my code,

// WRITING //

  int32_t nv_length = osal_nv_item_len(KIKO_NV_LAST_STATUSID);
  
  Res = osal_nv_delete(KIKO_NV_LAST_STATUSID, nv_length);
   
  Res = osal_nv_item_init(KIKO_NV_LAST_STATUSID, sizeof(NWK_Bufffer), (uint32_t*) NWK_Bufffer);
  
  NWK_Bufffer = osal_mem_alloc(128);

  sprintf(NWK_Bufffer, "1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9");

    HalUARTWrite ( MT_UART_DEFAULT_PORT, "Storing Status \r\n", strlen("Storing Status \r\n") );
    HalUARTWrite ( MT_UART_DEFAULT_PORT, NWK_Bufffer, strlen(NWK_Bufffer) );
    HalUARTWrite ( MT_UART_DEFAULT_PORT, "\r\n", strlen("\r\n") );
  
    Res = osal_nv_write(KIKO_NV_LAST_STATUSID, 0, sizeof(NWK_Bufffer), (uint32_t*) NWK_Bufffer);
    ASSERT(Res==0);
    
  Osal_mem_free(NWK_Bufffer);


// READING //

  int32_t nv_length = osal_nv_item_len(KIKO_NV_LAST_STATUSID);
    
  Res = osal_nv_item_init(KIKO_NV_LAST_STATUSID, sizeof(NWK_Bufffer), (uint32_t*) NWK_Bufffer);
    
  NWK_Bufffer = osal_mem_alloc(128);
  
    Res = osal_nv_read(KIKO_NV_LAST_STATUSID, 0, sizeof(NWK_Bufffer), (uint32_t*) NWK_Bufffer);
    
    HalUARTWrite ( MT_UART_DEFAULT_PORT, "Reading Status \r\n", strlen("Reading Status \r\n") );
    HalUARTWrite ( MT_UART_DEFAULT_PORT, NWK_Bufffer, strlen(NWK_Bufffer) );
    HalUARTWrite ( MT_UART_DEFAULT_PORT, "\r\n", strlen("\r\n") );

RESULTS ARE:

Storing Status
1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9
Reading Status
1,2,E

Hi Can any one tell why I am not getting all the stored data.

Thank you.

over 8 years ago

0 YiKai Chen over 8 years ago

Guru 735695 points

What is your KIKO_NV_LAST_STATUSID? Are you sure you don’t erase the flash after you write data into flash and before you read it?

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen,
"KIKO_NV_LAST_STATUSID" is" 0x1001" and I am sure not erasing flash any where after write and before read.

Thank you.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

0x1001 is out of boundary. Please revise KIKO_NV_LAST_STATUSID to use 0x0401 to test again.

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen,
I make it "0x0401" no changes, feeling same thing happening.

Thank you.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Are you sure you don’t erase the flash after you write data into flash and before you read it?

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen,
I am calling erase only before write, after write I am not at all calling anywhere i am sure.

thank you.

0 Raghunandana DS over 8 years ago in reply to Raghunandana DS

Mastermind 6385 points

Hi Chen,
I found one more thing that before write I am calling

int32_t nv_length = osal_nv_item_len(KIKO_NV_LAST_STATUSID);
// "nv_length = 4" getting //

Res = osal_nv_delete(KIKO_NV_LAST_STATUSID, nv_length);
// "Res = SUCCESS" getting //

Res = osal_nv_item_init(KIKO_NV_LAST_STATUSID, sizeof(NWK_Bufffer), (uint32_t*) NWK_Bufffer);
// "Res = NV_ITEM_UNINIT" getting //

So, i think init is making problem. Can you pls look this.

Thank you.

0 Raghunandana DS over 8 years ago in reply to Raghunandana DS

Mastermind 6385 points

Hi Chen,
I made changes as like below, its solved.

int32_t nv_length = osal_nv_item_len(KIKO_NV_LAST_STATUSID);
Res = osal_nv_delete(KIKO_NV_LAST_STATUSID, nv_length);
NWK_Bufffer = osal_mem_alloc(64);
Res = osal_nv_item_init(KIKO_NV_LAST_STATUSID, 64, (uint8*)NWK_Bufffer);
sprintf(NWK_Bufffer, "1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9");
Res = osal_nv_write(KIKO_NV_LAST_STATUSID, 0, 64, (uint8*) NWK_Bufffer);
ASSERT(Res==0);
osal_mem_free(NWK_Bufffer);

int32_t nv_length = osal_nv_item_len(KIKO_NV_LAST_STATUSID);
Res = osal_nv_item_init(KIKO_NV_LAST_STATUSID, 64, (uint8*) NWK_Bufffer);
NWK_Bufffer = osal_mem_alloc(64);
Res = osal_nv_read(KIKO_NV_LAST_STATUSID, 0, 64, (uint8*) NWK_Bufffer);

Thanks for help.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Cool!

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen,
Here in cc2538 6 pages of NV available for use and each has 2048 bytes seems.
I want to store 2 different data's to 2 different pages, mayI know how can I choose pages different while storing or reading.

Thank you.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

I don’t think you can assign specific page using osal_nv_write. Why do you intend to do so ?

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen,
My intention is to store 2 different types of data buffer.
So I feel instead of erasing 2 buffers every time, if I maintain 2 different pages I can do erase and rewrite separately.
As of my understanding I need to erase make the page and rewrite or else erasing in data in page of CC2538 Volatile memory as per conditions. So thought of use 2 pages.

thank you, if any wrong with my understand pls correct.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Using osal_nv_write, it will handle erase for you. I don’t see the reason why you have to use two separate pages.

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CC2538: OSAL NV READ