Problem about file create on nRF52840

[Blance]

usbd_msc.7z

Hello everyone:

The problem is still not resolved

Test broad is PCA10056

Test code was modified by \SDK17.0\examples\peripheral\usbd_msc\pca10056\blank\ses

Try to create a directory and write a file on this

Open txt file like under picture,data damage on address 0x3200~0x3400 ,What am I doing wrong?

[Blance]

Hello everyone:

Can anyone provide a program to change the usbd_msc example to use SPI to control PCA10056 Flash?
I think it will be useful

[Hung Bui]

Hi Blance,

Could you provide the code you used for automatic testing ?
I tried to test here with your previous code again but the result is different now that I don't see the issue any more. 
But as you mentioned the issue rate is low at ~1/60. But it's strange that last time on the first trial I got the issue showed in the screenshot. 
Have you tried "nrfjprog --qspierase" before testing ? It's to make sure the qspi is fully erased before we test. 

[Blance]

Hi Hung:

I have fond https://devzone.nordicsemi.com/f/nordic-q-a/56609/fatfs-corruption

and try set qspi writeback_mode = false(default :true),Problem seems solved

success : 2293

fail         : 0 

But I don't understand the function of writeback_mode, and I can't determine whether not using it will cause other problems. Can you help confirm?

[Hung Bui]

Hi Blance, 

I'm glad that you found a solution. We are still waiting for the developer to be back to have a look at the issue. We will give you an update when we hear from them.