fds_init() not work

[Pham Tam]

5287.sdk_config.h

Hi,
I'm developing an application using fds.
I merged fds into ble_app_uart and built complete
But when program run fds_init() nRF was crashed
I called fds_registered before.
What is the reason here ? Thank you
I attached my sdk_config.h
Debug terminal does not show any info about that

[Jared]

Hi,

You're using the wrong backend, if the Softedevice is enabled(as in ble_app_uart) then you should use the Softdevice backend instead of NVMC.

change FDS_BACKEND to 2 in the sdk_config.h file

regards

Jared 

[Pham Tam]

Hi, thank Jared for your reply. It worked !
After that if someone get an returning FDS_ERR_NOT_FOUND please follow this link

So now I have an problem with Segger Jlink. How can I dont erase flash memory before upload my code. 
May I try "upload range" ? I'm using nRF52833 and what is range that I have to modify ?

[Jared]

Hi.

You can use nRF Command line tools and do:

nrfjprog --program <HEX> --sectorerase

This will only erase the area that you write the hex to. 

Description

:

regards

Jared

[Pham Tam]

Hi, Jared
I have an problem when try to read flash the second time. The first time It show data correctly. And the second time It show FDS_ERR_NOT_FOUND.  May flash is deleted ?.

 

static void fds_evt_handler(fds_evt_t const *p_fds_evt) {
  switch (p_fds_evt->id) {
  case FDS_EVT_INIT:
    if (p_fds_evt->result != NRF_SUCCESS) {
      NRF_LOG_INFO("init error");
    } else {
      NRF_LOG_INFO("init success");
    }
    break;
  case FDS_EVT_WRITE:
    NRF_LOG_INFO("write done")
    flash_flag = true;
    memset(&ftok, 0x00, sizeof(fds_find_token_t));
    break;
  // case FDS_EVT_READ:
  default:
    break;
  }
}

int main(){
    
    static char const m_hello[] = "12!";
    record.file_id = FILE_ID;
    record.key = RECORD_KEY_1;
    record.data.p_data = &m_hello;
    record.data.length_words = (sizeof(m_hello) + 3) / 4;
    fds_record_write(&record_desc, &record);
    for(;;){
    
        if (flash_flag) {
      NRF_LOG_INFO("start read flash");

      // Read FDS
      // require memset(&ftok, 0x00, sizeof(fds_find_token_t));
     // fds_record_find(FILE_ID, RECORD_KEY, &record_desc, &ftok);

      while (fds_record_find(FILE_ID, RECORD_KEY, &record_desc, &ftok) == NRF_SUCCESS) {
        if (fds_record_open(&record_desc, &flash_record) != NRF_SUCCESS) {
          NRF_LOG_INFO("open FDS fail");
        }

        NRF_LOG_INFO("data from flash = %s", flash_record.p_data);
        /* Access the record through the flash_record structure. */
        /* Close the record when done. */
        if (fds_record_close(&record_desc) != NRF_SUCCESS) {
          NRF_LOG_INFO("close FDS fail");
        }
      }

      nrf_delay_ms(2000);

      // flash_flag = false;
    }
    
    }
    }

[Jared]

Hi,

Do you reprogram the chip between or do you only reset it?

regards

Jared 

[Pham Tam]

When I use debug terminal and use restart button" <- " at top-right. After I restart I got more data. The sencond start I got 2 time successfully and 3th time will return like as I mentiond above "FDS_ERR_NOT_FOUND". And so on, in third start, I got 3 time successfully and 4th return FDS_ERR_NOT_FOUND.

Please clarify for me what is the purpose of FILE_ID, RECORD_ID, page. Thank you

[Jared]

Pham Tam said:

Please clarify for me what is the purpose of FILE_ID, RECORD_ID, page. Thank you

This is explained here.

Could you share a minimal example that would reproduce this on a development kit?

regards

Jared