[hpsdr] [OT] Shipping container overload

[Christopher T. Day]

It's all still musings in my head at this stage, but I wouldn't think
the CPU core of the FX2 had to do anything in a great hurry; all the
heavy USB transfer lifting would still be done by the USB core. The CPU
would only have to handle configuration changes and COMMAND messages.
This would make a USB device that could - maybe anyway, I have to read
the MS DDK documentation - yield a device that worked with generic USB
Audio Device drivers.

And speaking of commands, since the FX2 has a direct I2C master on chip,
it could be used to send configuration commands to the ADC/DACs and save
some space in the FPGA.

And we could use a similar route to control the keyer settings, the
oscillator stabilizer, etc. It seems a shame to just chuck that
resource.

Anyway, just musings so far.


	Chris - AE6VK

P.S. - That's two go-ahead-and-solder votes so far.


-----Original Message-----
From: Eric Blossom [mailto:eb at comsec.com] 
Sent: Wednesday, March 15, 2006 11:46 AM
To: Christopher T. Day
Cc: High Performance Software Defined Radio Discussion List
Subject: Re: [hpsdr] [OT] Shipping container overload

On Wed, Mar 15, 2006 at 11:26:47AM -0800, Christopher T. Day wrote:
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > I've been musing on the idea that nobody seems to be using the FX2
as
> > anything but a mindless USB engine. I personally would like to see
it
> > used to provide a USB interface that follows the USB spec for Audio
> > Devices. .....

> FYI, the FX2 is pretty slow.  Although clocked at 48 MHz, it really
peaks
> at 12M (simple) instructions per second.

> Solder away ;)

> Eric


 1142452984.0