Hi, On Mon, Mar 25, 2013 at 06:47:34PM +0000, Stefan Schmidt wrote: > Hello. > > On Mon, 2013-03-25 at 10:30, Alexander Aring wrote: > > On Mon, Mar 25, 2013 at 03:31:04AM -0300, Werner Almesberger wrote: > > > Alexander Aring wrote: > > > > > > Hmm, but your driver still has the fundamental problem of tx/rx > > > doing all these USB transfers that get paced at one per USB frame, > > > i.e., 1 ms. Are you sure you want to continue along that path ? > > > > > Yes... I tested with a change firmware to tx/rx 16 bit values. I put > > tx to wValue/wIndex and receive in the receive buffer. > > > > But it is too slow, I think. What about to add a new bulk transfer and > > do something like linux. > > > > This bulk transfer uses a struct with a tx and rx buffer to send and > > receive at the same time. On the linux side we decode tx and rx buffer > > and put it into linux rx and tx spi buf. > > Did you read the other mails Werner and I exchanged? > > The basic idea Werner has for his new driver is that we would now > longer try to re-use the at86rf230 driver but but the state machine > handling for it directly into the fimrware. This will reduce the > number of urbs _a lot_ that need to be transfered. Shoving every SPI > command into an USB urb sending it of and waiting for the answer with > the USB delay makes it just painfully slow. > Yes, I do understand the problem now. Sorry :-)
> The new interface between firmware and driver would now take a > complete frame and does all needed stuff to send it off. On the > receiving side it would provide the driver with the full frame once. > > I would argue here that you sit together, via mail I think :), with > Werner and see if you could help him with his new driver. Doing the > changes to the old one Werner and I wrote is not the right way to > bring it up to speed. > At first I didn't want to do any change on the current firmware. I will look at the new Implementation and think about a solution. Since Werner is available at irc channel #linux-wpan, we are in contact. Regards Alex ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Linux-zigbee-devel mailing list Linux-zigbee-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-zigbee-devel
