Werner and Wolfgang advice from the peanut gallery:
PLEASE do NOT let the non-standard early protos of atben/atusb leave Werner's lab. That will only cause you pain and suffering, and SLOW DOWN getting this exciting project shippable. Spoken as an ex product manager who learned the hard way that letting experimental engineering alpha boards out creates support nightmares. And wastes precious engineering time. --- Ron K. Jeffries http://tinyletter.com/ronkjeffries (my experimental newsletter) On Fri, Jan 21, 2011 at 10:14, Werner Almesberger <[email protected]> wrote: > Richard Sharpe wrote: >> Good progress. I am still hoping to help out on the software side, >> although I am also moving forward on getting more involved in the >> Linux SCSI stack. > > I've been thinking about how to get you started. Getting the > hardware ready for production will take almost certainly longer than > beating the software into shape (it doesn't have to be ready at > production time - atben is firmware-less and atusb is easily > field-upgraded via DFU), that's why I'll supply the hardware side > first. > > I have a bunch of old cards that I could send to you immediately, > but they come with a few quirks: > > - all: use the AT86RF230 and not the AT86RF231, so there are many > small differences, including the lack of goodies like protection > of received frames against overwriting and the high-speed mode, > see the "231 only" comments in > http://projects.qi-hardware.com/index.php/p/ben-wpan/source/tree/master/atusb/fw/include/at86rf230.h > > - all: may have antenna tuning problems, resulting in maybe having > half the range or even less > > - atben: try to reuse the Ben's clock instead of having their own > crystal. This changes how the interface is set up, some of the > register settings, and most of all, cause a poor signal-to-noise > ratio. > > - atben: don't have the SLP_TR signal connected, which again affects > some driver operations. > > With so many subtle differences, I'm afraid that these critters would > be more troublesome than useful. But if everything goes well this > weekend, then I hope it shouldn't be much longer until I have > something I can send you. > > Here are all the (working) boards I've made so far, including the > two final "good" ones: > http://downloads.qi-hardware.com/people/werner/wpan/tmp/boards-so-far.jpg > >> One small spelling comment. "re-layouted" is not correct, > > Heh, I have to watch my English :-) I think I already lost when I > attempted to verb the technical term "layout." > > - Werner > > _______________________________________________ > Qi Hardware Discussion List > Mail to list (members only): [email protected] > Subscribe or Unsubscribe: > http://lists.en.qi-hardware.com/mailman/listinfo/discussion > _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
