• State Verified Answer
  • Replies 4 replies
  • Subscribers 74 subscribers
  • Views 650 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 249636
Options
This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts

Using Flash during Softdevice

oguzhanK

Hi,

I am trying to store a buffer which i collect from ble connection. I have tried sd_flash functions first. I could not found any examples so page number or addresses might be wrong.

So i tried to test it with very easy code. These lines are in main function after all service and other Initializations.

uint32_t test_buffer = 1;
uint32_t test_buffer2 = 0;

sd_flash_page_erase(0);
sd_flash_write((uint32_t *)0, &test_buffer, 1);

memcpy(&test_buffer2, (uint32_t *)0x3e000, 4);

Neither erase or write is working. 

// where can i found the document about pages to erase and write ?

So i tried flash_fstorage example

static void nus_data_handler(ble_nus_evt_t * p_evt)
{
  uint8_t temp_buffer[50] = {0};
  uint32_t test_buffer;
  uint32_t ab = 2;

    ret_code_t rc;

  if (p_evt->type == BLE_NUS_EVT_RX_DATA)
  {
    memcpy(temp_buffer, p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
    temp_buffer[p_evt->params.rx_data.length] = '\0';
    NRF_LOG_INFO("%s", temp_buffer);
    if(memcmp(temp_buffer, "123", 3) == 0)
    {
     // passkey_len = p_evt->params.rx_data.length - 3;
      NRF_LOG_INFO("Writing \"%x\" to flash.", ab);
      rc = nrf_fstorage_write(&fstorage, 0x3e100, &ab, sizeof(ab), NULL);
      APP_ERROR_CHECK(rc);

      wait_for_flash_ready(&fstorage);
      NRF_LOG_INFO("Done.");
      memcpy(&test_buffer, (uint32_t *)0x3e100, sizeof(test_buffer));
      NRF_LOG_INFO("%x", test_buffer);
    }
    /*else if(memcmp(p_evt->params.rx_data.p_data, "", ) == 0)
    {
    
    }*/
  }
}

But device can not even any log. I did everything according to the example. If i commenct out rc = nrf_fstorage_write(&fstorage, 0x3e100, &ab, sizeof(ab), NULL); i get all logs.

Parents
  • 0

    You cannot erase page zero when using softdevice - this is where the MBR is located. The first page you could erase is the first page above the softdevice itself.

    If you actually bothered to check return codes, this would be very obvious (invalid param or similar error code).

    Using LibC memcpy() for flash writes is asking for trouble: Newlib-nano memcpy() copies a single byte at a time, while flash must be written to 4 bytes at once. Those nvm driver functions exist for a reason.

Reply
  • 0

    You cannot erase page zero when using softdevice - this is where the MBR is located. The first page you could erase is the first page above the softdevice itself.

    If you actually bothered to check return codes, this would be very obvious (invalid param or similar error code).

    Using LibC memcpy() for flash writes is asking for trouble: Newlib-nano memcpy() copies a single byte at a time, while flash must be written to 4 bytes at once. Those nvm driver functions exist for a reason.

Children
Related
Terms of service