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

[dejans]

Hi,

Sergnrf said:

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

Thank you for providing this information.

You could start with mass sample and then add the functionalities that you need to it. In this way, you could narrow down the problem to a specific change which introduces the problem.

Best regards,
Dejan

[dejans]

Hi,

CONFIG_APP_MSC_STORAGE_FLASH_FATFS is Kconfig option in the scope of zephyr/samples/subsys/usb/mass sample.

Best regards,
Dejan