CONFIG_APP_MSC_STORAGE_RAM VS FLASH_FATFS

[Sergnrf]

Hi Team,
NCS v2.3.0
nrf52840

my project works as expected with CONFIG_APP_MSC_STORAGE_RAM=y

but I need storage FLASH_FATFS

I set CONFIG_APP_MSC_STORAGE_FLASH_FATFS=y
and the disk does not open in Windows, it gives an error window when connecting nrf USB.

Thank you.

4034.chatDK_update.7z

[dejans]

Hi,

Could you please show the error that you get?

Best regards,
Dejan

[Sergnrf]

windows error looks the same as in devzone.nordicsemi.com/.../nrf52833dk_nrf52833-usb-mass-storage-issue

[dejans]

Hi,

Have you tried using the sample 275880_mass_v2.2.0.zip provided here? I have tested it and it is working in NCS v2.2.0.

Please find below the log from my nRF52840-DK. 

*** Booting Zephyr OS build v3.2.99-ncs1 ***
Area 0 at 0x46000 on flash-controller@4001e000 for 237568 bytes
[00:00:00.255,706] <inf> flashdisk: Initialize device NAND
[00:00:00.255,737] <inf> flashdisk: offset 46000, sector size 512, page size 4096, volume size 237568
[00:00:00.261,444] <inf> flashdisk: Initialize device NAND
[00:00:00.261,474] <inf> flashdisk: offset 46000, sector size 512, page size 4096, volume size 237568
Mount /NAND:: 0
/NAND:: bsize = 512 ; frsize = 512 ; blocks = 424 ; bfree = 420
/NAND: opendir: 0
  D 0 SYSTEM~1
  F 5 MY_TEXT.TXT
End of files
[00:00:00.325,805] <inf> main: The device is put in USB mass storage mode.

Best regards,
Dejan

[Sergnrf]

I use NCS v2.3.0, Mass example works, but I need this functionality to work in the Сhat example, I added the archive with the project, look at the errors it gives, this is an urgent problem, thanks.

[dejans]

Hi,

When testing your sample project, I have not had any issues when using CONFIG_APP_MSC_STORAGE_RAM=y. The disk appeared as expected and behaved properly.

However, when I tried to reproduce your error on Windows 10 using NCS v2.3.0 with following configuration options:

CONFIG_APP_MSC_STORAGE_FLASH_FATFS=y
#CONFIG_APP_MSC_STORAGE_RAM=y

I could not get the same error as you from the log, but I got similar error - "failed to mount file system".



USB appeared as device, but it was not reacting when I tried to open it. 

Best regards,
Dejan

[Sergnrf]

Hi,
yes everything is as you described.

Best regards,
Serhii

[dejans]

Hi,

Is your project based on the mass storage sample?

Best regards,
Dejan

[Sergnrf]

Yes, example Mass

[dejans]

Hi,

As you based your project on the mass sample, you could start adding the changes one-by-one to the mass sample in order to find which one of the introduced changes breaks the storage.

Best regards,
Dejan

[Sergnrf]

I use CHAT + MASS when I add I come to the example that I posted here for you