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<DIV>Lyle</DIV>
<DIV> </DIV>
<DIV>Thanks for the update, I understand your logic, have to keep this future </DIV>
<DIV>GUI interface board in mind while detailed design progresses on Sasquatch.</DIV>
<DIV> </DIV>
<DIV>Kevin</DIV>
<DIV>M0KHZ</DIV>
<DIV> </DIV>
<DIV id=IncrediOriginalMessage dir=ltr><I>-------Original Message-------</I></DIV>
<DIV> </DIV>
<DIV id=receivestrings>
<DIV dir=ltr style="FONT-SIZE: 11pt"><I><B>From:</B></I> <A href="mailto:kk7p@wavecable.com">Lyle Johnson</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt"><I><B>Date:</B></I> 20/03/2007 18:33:34</DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt"><I><B>To:</B></I> <A href="mailto:m0khz@tiscali.co.uk">Kevin M0KHZ</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt"><I><B>Cc:</B></I> <A href="mailto:kd5byb@bellsouth.net">Ben Hall</A>; <A href="mailto:hpsdr@hpsdr.org">hpsdr@hpsdr.org</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt"><I><B>Subject:</B></I> Re: [hpsdr] Pandora Enclosure Project Proposal.</DIV></DIV>
<DIV> </DIV>
<DIV>> Wouldn't the simplest route be to use a USB to USB inter board connector</DIV>
<DIV> </DIV>
<DIV>No, that means that the DSP has to support a host mode USB interface.</DIV>
<DIV>That would be a huge processing load.</DIV>
<DIV> </DIV>
<DIV>We need something simple, and with enough bandwidth to handle what we</DIV>
<DIV>need. I suspect what we need is just a spectrum display with not more</DIV>
<DIV>than 320 bins (assuming a QVGA display,it only has 320 horizontal</DIV>
<DIV>pixels, perhaps 8 bits of amplitude information (gives 256 levels,</DIV>
<DIV>display is less than this verticaly) -- and 4 bits may be enough for a</DIV>
<DIV>bandscope display - and refreshed perhaps 20 times/second. This is only</DIV>
<DIV>(320*8*20 = ) 51,200 bits/sec. Easy to do on SPI or I2C. SPI is</DIV>
<DIV>simpler, but the DSP chip has both interfaces built-in and I suspect the</DIV>
<DIV>ARM chip will as well. Have to see which of them are actually available</DIV>
<DIV>after all the necessary stuff gets attached for its DSP mission, though,</DIV>
<DIV>since the peripheral pins are multiplexed...</DIV>
<DIV> </DIV>
<DIV>Lyle K7P</DIV>
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