RE: SDCard insert and mount

Keith V — Tue, 30 Nov 2021 18:30:26 GMT

Found it. In the eject function I was never calling disk_uninitialize() due to the check against m_disk_state being wrong it should look like this:

for (uint32_t retries = 3; retries && (m_disk_state != STA_NOINIT); --retries)
      {
         m_disk_state = disk_uninitialize(0);

      }

      if (m_disk_state != STA_NOINIT)
      {
         NRF_LOG_INFO("Disk uninitialization failed.");
         return;
      }

RE: SDCard insert and mount

Keith V — Tue, 30 Nov 2021 16:16:18 GMT

"Wait for the SD card to be detected?" I don't have the detect line connected to any code.

Everything is done manually through a CLLI at this point

Before removing the code I un-initialize and unmount the card:

static void sdEject(void)
{
   if (f_mount(NULL, "", 0))
   {
      NRF_LOG_INFO("UnMount failed\r\n");
   }
   else
   {
      NRF_LOG_INFO("SD Card UnMounted");
      SDCinited = false;

      for (uint32_t retries = 3; retries && m_disk_state; --retries)
      {
         m_disk_state = disk_uninitialize(0);

      }

      if (m_disk_state)
      {
         NRF_LOG_INFO("Disk uninitialization failed.");
         return;
      }

      NRF_LOG_INFO("disk state : %d", m_disk_state);
      NRF_LOG_INFO("disk unitialized");
   }
}

I'm manually calling init() from the CLI after I put the disk in

static bool is_sd_present(void)
{
   bool pin = false;

   if( GPIOinited)
   {
      //detect pin grounded when sd card inserted
      pin =  nrf_gpio_pin_read(SDC_CD_PIN) == 0;
   }
   else { NRF_LOG_INFO("SD Card IO not inited");}

   return pin;
}

void SDInit(nrf_cli_t const * p_cli, size_t argc, char ** argv)
{
    FRESULT ff_result;
    static bool registered;

    if(false == SDCinited)
    {
       GPIOInit();

       NRF_LOG_INFO("Initializing SD Card");

       if(is_sd_present())
       {
       
          if(false == registered)
          {
             registered = true;

             // Initialize FATFS disk I/O interface by providing the block device.
             static diskio_blkdev_t drives[] =
             {
                  DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_SDCard_block_dev_sdc, block_dev), NULL),
             };

             diskio_blockdev_register(drives, ARRAY_SIZE(drives));
          }

          m_disk_state = STA_NOINIT;

          NRF_LOG_INFO("Initializing disk 0 (SDC)...");
          for (uint32_t retries = 3; retries && m_disk_state; --retries)
          {
             NRF_LOG_INFO("retry.");
              m_disk_state = disk_initialize(0);
          }
          if (m_disk_state)
          {
              NRF_LOG_INFO("Disk initialization failed: %x", m_disk_state);
              return;
          }

          uint32_t blocks_per_mb = (1024uL * 1024uL) / m_SDCard_block_dev_sdc.block_dev.p_ops->geometry(&m_SDCard_block_dev_sdc.block_dev)->blk_size;
          uint32_t capacity = m_SDCard_block_dev_sdc.block_dev.p_ops->geometry(&m_SDCard_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
          NRF_LOG_INFO("Capacity: %d MB", capacity);

          NRF_LOG_INFO("Mounting volume...");

          memset(&fs, 0, sizeof(fs));

          ff_result = f_mount(&fs, "", 1);
          if (ff_result)
          {
              NRF_LOG_INFO("Mount failed; %x", ff_result);
              return;
          }
          else
          {
               NRF_LOG_INFO("Mount succeeded");
          }
 
          SDCinited = true;

      }
      else
      {
         NRF_LOG_INFO("No SD Card Inserted!");
      }
   }
   else
   {
      NRF_LOG_INFO("SD Card already initialized!");
   }


    return;
}

I don't see a reset() anywhere in the Fat files (ff.c) or the disk files (diskio_blkdev.c) Do you mean a processor reset???

RE: SDCard insert and mount

Simonr — Tue, 30 Nov 2021 10:03:33 GMT

Hi Keith

An FR_DISK_ERR from the find_volume() function points to an error in the disk I/O layer. What I'm guessing is happening, is that the mount process is already in progress when you reinsert the SD card, causing the mount to have a disk error. Can you try adding a reset when this occurs, so it can try mounting again, as I think the mount starting over should return successfully. Alternatively, wait for the SD card to be detected before starting the mount process.

Best regards,

Simon