Maybe this is really obvious but why are we doing N-pt FFTs every N/2 samples and not every N samples where N=8192. I think there's something about the algorithm that I'm missing. Do we have to do anything special with the data overlapping when we dma back out? <br>
<br>BTW - I resubmitted my milestone after Doug reminded me where in the lab instructions it showed us to dump data from MATLAB to CCS3.1. I was having issues with that Thursday night since I missed that part on the instructions...ooops.<br>
<br>Thanks,<br><br>Alan<br><br><div class="gmail_quote">On Sun, Oct 18, 2009 at 7:48 PM, Alan Ding <span dir="ltr"><<a href="mailto:alan33d@gmail.com">alan33d@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Thanks Doug.<br><br>I'm also having a tough time locating register definitions from the lecture notes:<br><br>CIPR<br>QOPT...etc.<br><br>I found the macros in csl_edmahal.h which was not part of the example project.<br>
<font color="#888888">
<br>~Alan</font><div><div></div><div class="h5"><br><br><div class="gmail_quote">On Sun, Oct 18, 2009 at 7:39 PM, Doug Wenstrand <span dir="ltr"><<a href="mailto:doug@echelonembedded.com" target="_blank">doug@echelonembedded.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Yea, I forgot to time it and fill in the requirement. Your presumption of course is correct -- We want you to use QDMA to do it efficiently, but you need not worry about overlapping the transfers with computations.<div>
<br>
</div><div>So -- the following pseudocode is what would meet the timing requirement:</div><div><br></div><div>loop:</div><div>dma data in</div><div>wait for it</div><div>fft</div><div>dma data out</div><div><br><br><div class="gmail_quote">
<div><div></div><div>
On Sun, Oct 18, 2009 at 6:46 PM, Alan Ding <span dir="ltr"><<a href="mailto:alan33d@gmail.com" target="_blank">alan33d@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div>
For the requirements on the back of the lab, it states that our STFT "must take less than xx ms". What exactly is xx? ~1.7ms*100 or ~48ms*100? I take it you guys want us to get roughly the first timing requirement using QDMA. <br>
<br>When we first capture the data in ext ram from CCS. The instructions wants us to create a plot of this data in CCS. How do you do that? Should we use the Graph function under the view tab? What options should we use for it?<br>
<br>Thanks,<br clear="all"><font color="#888888"><br>-- <br>-------------------------------------------------------<br>Alan Ding<br>Master of Sci, Electrical Engineering<br>Johns Hopkins University<br><br>Email: <a href="mailto:alan33d@gmail.com" target="_blank">alan33d@gmail.com</a><br>
Contact #: 4844593290<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>-------------------------------------------------------<br>Alan Ding<br>Master of Sci, Electrical Engineering<br>Johns Hopkins University<br><br>Email: <a href="mailto:alan33d@gmail.com" target="_blank">alan33d@gmail.com</a><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>-------------------------------------------------------<br>Alan Ding<br>Master of Sci, Electrical Engineering<br>Johns Hopkins University<br><br>Email: <a href="mailto:alan33d@gmail.com">alan33d@gmail.com</a><br>
Contact #: 4844593290<br>