Wolfgang Wegner wrote:
Hi Jerry,
On Tue, Oct 27, 2009 at 10:03:49AM -0400, Jerry Van Baren wrote:
Jerry Van Baren wrote:
Wolfgang Wegner wrote:
[...]
we have an update protocol that normally relies on data being received while the previous block is written to flash.
[...]
By the way, what sort of benefit do you see? What is your load time with and without the non-blocking changes?
I am not sure if I understand what you mean, or if we are talking about different things.
Yes, you are addressing my question. I was probing for your use case and results.
Our update protocol starts the update and immediately starts sending data over the (relatively slow) serial line. During the data is transferred, the first flash block is erased (first operation "in background"), and after the data for the complete flash block arrived, this data is written to flash and the next block is erased (again an operation "in background"), while the data transfer over the serial line continues.
I was thinking in terms of TFTP - quite fast. Your device is transferring the data it over the serial link - very slow. This means you data transfer is slow even relative to a flash erase operation, so this gives a substantial speed improvement.
[snip]
Regards, Wolfgang
Thanks, gvb