Wow, I feel lost at some point. I though that the Y-Box will be used to connect anelok to pc, but now it's like an independent wireless proxy, no?
On Thu, Jan 16, 2014 at 3:59 PM, Werner Almesberger <[email protected]>wrote: > I've prepared a draft of the design of the new and greatly enhanced > Y-Box. Schematics: > > > http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox-draft-20140116.pdf > > Layout: > > > http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox-draft-20140116.png > > > Changes from the old version: > > - added KL25 (for USB) and CC2543 (BTLE-capable RF SoC) > > - PCB is now 45.1 x 21.6 mm = 974 mm^2 (up from 30.0 x 18.5 mm = > 555 mm^2) > > - slot-mounted USB A receptacle should reduce overall case height by > about 4 mm > > > General features: > > - Freescale KL25 with 48 MHz ARM Cortex M0+, 128 kB Flash, 16 kB RAM, > basically the same chip as in Anelok, but in a smaller package > (32-QFN instead of 48-QFN) (1) > > - TI CC2543 with (I think) 32 MHz 8051 core, 32 kB Flash, 1 kB SRAM, > and a 2.4 GHz transceiver that's assumed (2) to be BTLE-capable > > - general layout (see the layout image, link above, for details): > > 12 o'clock: PC-facing USB Micro B port. PC provides power to Y-Box > and all that is attached. PC accesses the KL25 for RF communication. > (3) > > 3 o'clock: device-facing USB A (full-size) receptacle. Device > receives power from PC. > > 6 o'clock: Anelok-facing USB Micro B port. Anelok receives power > from the PC and acts - through the Y-Box - as USB host for the > device in the USB A receptacle. > > 9 o'clock: antenna. > > - two brightness-matched LEDs (green for the KL25 and red-orange for > RF) on PWM-capable I/O pins > > - 5 general-purpose test pads on the KL25, 2 on the CC2543. Pads are > 2 mm and each group (4+1+2) is placed with 1.2 mm spacing (which is > roughly the spacing of ribbon cables) > > - large test pads on the bottom with >= 4 mm center-to-center spacing > give access to power and in-circuit programming interfaces of both > chips. (4) > > - KL25 has access to in-circuit programming signals of the RF SoC > > - single-crystal design: the RF SoC has the crystal and provides a > precision clock (required for USB) to the KL25. (5) > > (1) May switch to a KL24/KL25/KL26 with smaller memories in the final > product. The "big" chip is for development. > > (2) The chip is not marketed as BTLE-capable but its capabilities > suggest that it can be used for it. Some low-level functionality > that is usually done in hardware, e.g., whitening, may have to > be done by software. > > (3) If all we need is power, the "PC" can be any USB power source. > > (4) To be used for a yet-to-be-designed "bed of nails" production > programming device. > > (5) Since the CC2543 may have bad firmware, we cannot rely on it to > provide the clock on its own. Therefore, the idea is that the > DFU boot loader in the KL25 will reset the CC2543 and put it in > debug mode, then command it to output the clock, enumerate, wait > briefly for "emergency repair" DFU activity, and then jump to > the application which can release/reboot the CC2543. > > > Since the Y-Box is now considerably more complex than before, I've > given it its own repository: > > https://gitorious.org/anelok/ybox > > The analok/ybox repository should be placed at the same level in the > directory hierarchy as the anlok/anelok repository (and all the > Qi-Hardware repos we use.) > > > I plan to make a first board during the next week, so there is still > plenty of time to review schematics and layout. > > After that the firmware has to be written (both for KL25 and CC2543) > and finally the case design will have to be adapted, too. Once > correct operation of the Y-Box is verified, Anelok will switch to the > CC2543 (along with its firmware), too. > > Comments ? > > - Werner > > _______________________________________________ > Qi Hardware Discussion List > Mail to list (members only): [email protected] > Subscribe or Unsubscribe: > http://lists.en.qi-hardware.com/mailman/listinfo/discussion > -- Felix
_______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
