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Re: [Xylo-SDR] Cyclone II board
Your board sounds good, and that is a good price for the chip.
All this new technology has one drawback, you must get a PCB board made
because it's impossible to breadboard without a PCB to solder the chips
Right now when I need a PCB board, I sketch it with pencil to figure the
line layout, then use Photoshop to create the 10X art, which after
verification I print on a piece of photo paper and use heat transfer to a
It works well for small boards, but it's a very tedious method to make a
larger or complicated board.
I guess I should have learned to use a Software package like Kicad or
Eagle some time back when I had no need for them, so now I would be able
to lay out my own PCB's. Hindsight is almost always 20/20 :'(
At 11:09 AM 12/11/2005, you wrote:
As I mentioned on the Softrock
forum, I'm working on a small system like the Xylo, but using the newer,
bigger and better Cyclone II EP2C5T144 FPGA. The forthcoming KNJN Saxo
board probably uses it. My board will just have the parts for an SDR on
it, PIC18F2455 for FPGA configuration download and PC comms, the FPGA and
a suitable ADC (probably the Wolfson one), and will be very cheap.
I've been told that the '2455
doesn't work properly for full-speed USB 2.0, but can't seem to pin this
down. I've just designed a small home-made PCB with just the '2455 on it
that I can try out, before I commit to using it with the FPGA.
I've got some EP2C5T144 chips on
order from Altera (about $12 each plus shipping etc.), and should get
them next week. I've created the EP2C5 part for the Pulsonix PCB software
I use, but need to finish off defining the pin net names, which will
minimise the chance of design errors. Altera has a useful spreadsheet for
the pinouts, which saved me a lot of time as I could just copy/paste the
pin logic names into the Pulsonix part editor.
Xylo-SDR mailing list
To post msg: Xylo-SDR@ae5k.us
Xylo-SDR web page:
"I fail to see why doing the same thing over and over and
getting the same results every time is insanity: I've almost proved it
isn't; only a few more tests now and I'm sure results will differ this
time ... "