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<DIV dir=ltr align=left><SPAN class=203402517-03112009><FONT face=Arial
color=#0000ff size=2>Yes, this makes sense. I wasn't thinking of the CIPR
register as 16 locations, or essentially like 16 complete flags. I will
investigate tonight why I'm getting both transfers completing before I check the
CIPR. Thanks!</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dspforum-bounces@echelonembedded.com
[mailto:dspforum-bounces@echelonembedded.com] <B>On Behalf Of </B>Wenstrand,
Doug S.<BR><B>Sent:</B> Tuesday, November 03, 2009 11:21 AM<BR><B>To:</B>
dspforum@echelonembedded.com<BR><B>Subject:</B> Re: [Dspforum] CIPR
question<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Bits
19-16 of the options register are the Transfer Complete Code. Those 4 bits
are a number from 0-15, which specify which bit in the CIPR gets set when the
transfer is complete. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">So
you are setting bits 2 and bit 1 of the CIPR respectively, so if you read the
CIPR, you should see either a 4, or a 2 (bits 2 or 1 being set) When you
read a “6” its because both are set, meaning both transfers are complete.
This could be because you didn’t check soon enough and they both finished, or
because you didn’t clear the CIPR bit after using it.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Make
sense?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Doug<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
dspforum-bounces@echelonembedded.com
[mailto:dspforum-bounces@echelonembedded.com] <B>On Behalf Of </B>O'Connor, Sean
R.<BR><B>Sent:</B> Tuesday, November 03, 2009 10:21 AM<BR><B>To:</B>
dspforum@echelonembedded.com<BR><B>Subject:</B> [Dspforum] CIPR
question<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><o:p> </o:p></P>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Setting the OPT
registers for ping and pong to 0x20320002 and 0x20310002 should set CIPR to 2
and 1 when the transfers have completed, I think. CIPR is actually getting
set to 6 and 4 respectively, and if I use 6 and 4 as my masks things seem to
operate as expected (at least ping and pong get updated and waitfordma() does
not hang). To my knowledge the OPT register is the only register that can
effect the CIPR... so this discrepancy is confusing to me. Any
thoughts?</SPAN><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"> <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Thanks,</SPAN><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Sean</SPAN><o:p></o:p></P></DIV>
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