NRF52833DK_NRF52833 USB Mass Storage Issue

[DEng01]

Hi everyone,

I am trying to run the Zephyr Samples USB Mass Storage example on a NRF52833DK using the internal flash for the FAT-FS partition.

When I plug the Nordic device into a windows machine, the USB device is recognized as a USB storage device however the system cannot access the flash device.

 

My development environment:
- nRF52833 DK
- Zephyr ncs v2.2.0
- nRF Connect for VS Code 

My Proj Conf is as follows:

CONFIG_STDOUT_CONSOLE=y

#USB related configs
CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr MSC sample"
CONFIG_LOG=y
CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y
CONFIG_USB_MASS_STORAGE=y
CONFIG_USB_DEVICE_LOG_LEVEL_ERR=y
CONFIG_USB_MASS_STORAGE_LOG_LEVEL_ERR=y

CONFIG_MAIN_STACK_SIZE=16384
CONFIG_APP_WIPE_STORAGE=y

CONFIG_APP_MSC_STORAGE_FLASH_FATFS=y

I have also zipped up the project and attached this to this post.

mass-nrf52833.zip

Has anyone come across this issue and know what is going wrong?

Thanks,

David

[ovrebekk]

Hi David

Most likely the issue here is that the mass sample is not setup to support internal flash, it assumes you use an external NOR flash connected over QSPI. 

Please refer to this older case, where I also share some code I tested to work on the nRF52833DK:
problem implementing USB mass storage in nrf52833dk

Best regards
Torbjørn

[DEng01]

Hi Ovrebekk,

Thank you for replying to my post. I did see your post from last year and the code example in 275880_mass.zip.

It seems that the following Kconfig additions have been deprecated with ncs v2.2.0 (replacement of node labels).

config DISK_FLASH_DEV_NAME
	default "MX25R64" if "$(dt_nodelabel_enabled,mx25r64)"
	default "GD25Q16" if "$(dt_nodelabel_enabled,gd25q16)"
	default "NRF_FLASH_DRV_NAME"

config DISK_VOLUME_SIZE
	default 0x3A000

config DISK_FLASH_MAX_RW_SIZE
	default 4096

config DISK_FLASH_ERASE_ALIGNMENT
	default 0x1000

config DISK_ERASE_BLOCK_SIZE
	default 0x1000

It seems the latest way to configure the usb msc disk is to add the following into the overlay:

msc_disk0 {
		compatible = "zephyr,flash-disk";
		partition = <&storage_partition>;
		disk-name = "NAND";
		cache-size = <4096>;
	};

However I can't find any documentation on the options to configure the mdc_disk with the same parameters as used in 275880_mass example. And when adding the msc_ovelay - it still did not work.

Do you know what needs to be added to update my example or the 275880_mass to compile with ncs v2.2.0? 

Thanks,

David

[ovrebekk]

Hi David

Basically these options have been moved from Kconfig to device tree, and things like the DISK_VOLUME_SIZE will now be read from the partition sizes directly. 

I made some changes to the overlay and Kconfig files in order to make the sample run in v2.2.0. I tested it on the nRF52840DK and the nRF52833DK:

275880_mass_v2.2.0.zip

Best regards
Torbjørn