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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Social obligations intervene. As an update:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>You may have noticed in the ARRL Newletter that KC4AAA, the
station at Amundsen/Scott Base at the South Pole will be on the air during
Filed Day on 20m. Give a listen. One of the folks I worked with down there over
Xmas will likely be one of the operators. She is AB1FG. There’s no way
they’ll hear me with a measly 8W, so if anybody contacts her, say “Hi!”
for me.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have all the parts for a Janus board in hand except for
two backordered 39k resistors. I want to get all the passive parts on board
(save those two, maybe) before adding any active components. I’m working
on the ESD resistors now.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I got some tools to finish my SlimGem enclosure for the
PA-100 preamp from K5OOR. That now moves up in build priority.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’ve been struggling to assemble a PC for home use
with all this radio stuff. No joy in Mudville so far. I have all new parts
assembled as carefully as I could – and I’ve been fiddling about in
the insides of computers for 25+ years – but there is no signal coming
out the video card and no evidence of it even reaching anybody’s BIOS. Stumped
and frustrated for the moment.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’ve started going through the exercise of defining
USB Descriptors for what an HPSDR might look like if we make full use of the
features available in the USB Architecture. I’ve got the required Default
Full-speed Device, Configuration and Interface Descriptors done, For
High-speed, I have the Device Descriptor done as well as two Configuration
Descriptors – one for regular Run-Time and one for Device Firmware Update
Transfer Mode. [The Other Speed Descriptors are also done.] The Device Firmware
Update Transfer Mode Interface Descriptor and Functional Descriptors are
completely standard so won’t be hard.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>All the interesting stuff will be in the High-speed Run-time
Configuration’s Interface Descriptors. What I have in mind at the moment
is:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>1)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Printer Descriptor for the <st1:place
w:st="on"><st1:PlaceName w:st="on">Parallel</st1:PlaceName> <st1:PlaceType
w:st="on">Port</st1:PlaceType></st1:place> control to, for example, an
SDR-1000<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>2)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Human Interface Device Descriptor
with Interrupt IN Endpoint for the key/paddle interface<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>3)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Human Interface Device Descriptor
for frequency measurement/control<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>4)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Additional HID Descriptor as needed
for other slow control functions _<i><span style='font-style:italic'>except</span></i>_
for audio<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>5)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Two Audio Device Interface Descriptor
clusters, one for the Receive chain an one for the Transmit chain.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
style='mso-list:Ignore'>6)<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The Audio Clusters would also be the
Interfaces where such things as sampling rate selection happens.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>For Endpoints on the FX2, this would have everything sharing
the Endpoint 0 IN/OUT endpoints, of course. 2) would use Endpoint 1 IN. The
other HID Interfaces don’t need endpoints beyond Endpoint 0. For the
Audio Device Chains, each would have two Endpoints, say 2 IN and 4OUT for one
and ^ IN and 8 OUT for the other. These would carry the bulk of the data. We
still get to argue here about Bulk vs. Isochronous Transfers here.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Despite appearances, there are some advantages to this
scheme. For one thing, it eliminates the special-purpose protocol inside the packets
of Audio data; different functions are on different pipes. Changing this
protocol will be annoying since it couples everything together, but inevitable;
it does not allow for ISB as it stands, for example. Also, we don’t have
to write or maintain the multiplexing/demultiplexing code.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>That uses up all but one Endpoint that the FX2 can supply,
viz. I OUT. Other than screams of horror at the complexity of it all, are there
any comments?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Chris
– AE6VK<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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