SDK15.3 USB_MSC example does not work properly

[Nandi]

Hi,

In SDK15.3 USB MSC example can't  work.

First, the computer does not recognize the USB MSC device and initializes it normally after calling nrfx_systick_init.

Secondly, although the computer can recognize that the file operation cannot be performed at that time, once the operation causes the USB MSC to be stuck.

 The project is more urgent, What can I do to get it back to normal?

Debugging environment

development software : SDK15.3

Computer platform : window7/10

hardware : PCA10056

[Sigurd]

Hi,

What version of the PCA10056 do you have ?

[Nandi]

PCA10056

0.9.3

2017.40

[Sigurd]

The PCA10056 V0.9.x has engineering A mounted on it, and workarounds for older engineering revisions have been removed from SDK v15, and we recommend using the latest production release of the silicon for development. 

I would strongly recommend that you develop on a nRF52840-DK, PCA10056 1.0.0, as this uses the production silicon.

[Nandi]

If I want to support it on version 0.9.3, what do I need to do?

In addition, can the mass-produced chips be supported normally?

Can I replace the 52840 chip on the 0.9.3 version with the production chip as the 1.0.0 version?

[Nandi]

I just changed the chip to N52840 QIAAC0 1829DF, still not working properly