On 01/11/2019 22:48, QRP RX wrote:
On Fri, Nov 1, 2019 at 07:46 PM, Barry Jackson wrote:
I notice that some .dfu firmware files that I have seen are in the 80kB to
100kB plus so the 16kB looks wrong to me.
16 kB is a page size. It means data chunk size which controller can accept for flashing.
So, software needs to split 80-100 kB firmware to 16 kB data chunks and send it one-by-one.
Thanks for your reply,
However I am not trying to upload to the vna, I am trying to download the existing firmware for backup.
The dfu-util man page says:-
"
-t, --transfer-size SIZE
Specify the number of bytes per USB transfer. The optimal value is usually determined automatically so this option is rarely useful. If you need to use this option for a device, please report it as a bug.
"
Which is why I did not specify a -t option.
If I do, the max limit seems to be 4096, but the resulting file size is still only 16k.
What am I missing?
Barry
G4MKT
