nRF52832: Run the PCA10040-DK J-Link OB-SAM3U128-V2-NordicSemi on custom board

[tBStar]

I know this sounds a crazy question but is it possible to flash a custom nRF52832 board with the same firmware that is shipped with the dev kit and create a mass storage out of it?

The goal is to have some dedicated space out of the 512KB as a USB storage to upload code file.

Thanks,

[Jørgen Holmefjord]

Hi,

This firmware is running on the Interface MCU/J-Link On-Board debugger on the DK. Are you planning to include this chip on your custom board?

The nRF52832 does not have a USB interface, so there is no way to make it into a USB mass storage device on its own.

Best regards,
Jørgen

[tBStar]

Jørgen Holmefjord said:

This firmware is running on the Interface MCU/J-Link On-Board debugger on the DK. Are you planning to include this chip on your custom board?

I am going to pretend I never ask that question. It makes total sense, I am looking at upgrade the chip to an nRF52840 to take advantage of the USB interface.

Thank you

[Jørgen Holmefjord]

In case you do not need the additional features of the nRF52840 (1MB Flash/256kB RAM, Cryptocell, QSPI), the nRF52833 also includes the USBD interface. 

[tBStar]

I think the USBD interface will create a COM port and not a mass storage which I need. If that's true, nRF52840 is the next level.

Thanks,

[Jørgen Holmefjord]

The USBD peripheral is the same on nRF52833 and nRF52840. It can support any USB class that nRF52840 will support. Our USB device library implements support for the following USB classes:

• USB audio class module

• USB HID class modules

• USB Mass Storage Class module

• USB CDC ACM module

The usbd_msc example in the SDK does not provide a project for nRF52833 DK (PCA10100), but this is mainly because this chip does not support QSPI, which the example utilizes for one of the mass-storage disks.