use ncs1.5.0 fats and nrf5340 ,fil can not save in sd card

[zhouhaifang]

i use a thread to save fil like below ,and find can not save file in sd card ,sd card SPI test ok . before enter in loop. close fil and reset system can save fil in sd card 

but when code run in thread loop , want to open fil to write ,and close fil to save in sd card . fil can not save .i do not kown where to open /close fil to save and re-write

for (;;) {

  if(k_sem_take(&test_sem, K_MSEC(5)) == 0)
 {

    g_sd_ecg_temBuf->u32TotalLen+=21;
    f_lseek(&fil , g_sd_ecg_temBuf->u32TotalLen);

     f_write(&fil ,"total line:0000000000", 21,&bw);

  }
  //every (300*100 ms = 30 second)save file in sd card
  if(k_sem_take(&auto_save_file_sem, K_MSEC(30)) == 0)
  {
    f_close(&fil);//save file
   //re_open corrent file for next writing
   f_open(&fil, (const char*)"0:/zhfdata.txt", FA_WRITE | FA_CREATE_ALWAYS);

  }

}

[Øyvind]

Hello, 

Note that we are currently in our summer vacation period and responses are expected to be slow due to little availability of resources.

---

Has your application worked before? Are you getting any errors when running this? Have you debugged the code?

Kind regards,
Øyvind

[zhouhaifang]

the reson is fil alway opened  to be written ,i alway cut off power,and before cut power fil is opened,so can not save file .before cut power fil must be in close status 

[Øyvind]

Please see Disk Access chapter in the Zephyr repo.

Kind regards,
Øyvind