To the kind attention of Nordic support team,
I'm using a command like this: nrfutil dfu usb-serial -pkg x.zip -p COMx.
I use it to program a default PCA10056 DK board with open bootloader preinstalled.
I notice seeing in the USB analyzer, that since I give the command to when the image is actually sent there is about a 30 sec delay,
during which it seems to be not activity in the USB bus.
After the moment I give nrfutil command, In the USB analyzer (Total Phase Data Center) I can only see SOF packets bus level timing for about 30 seconds. But it seems there is not
any other relevant acitivity. After that, there is a reset (target disconnected/reconnected) and image transfer is quite quick.
When in x.zip there is also a softdevice other than the application firmware, before sending the softdevice image it happens the same. There is another huge delay, after that a reset and the image is finally sent very quickly.
I saw in the dev zone that there has been issues with nrfutil speed sometime. I can notice that transfer speed is good, but I don't understand where the huge delay
before the image transfer comes from. Do you have any suggestion for us?
Thank you
