According to a previous post
(http://www.mail-archive.com/[email protected]/msg00960.html),
the XDAIS Framework is suppose to handle cache coherency automatically (points
1-4 in the post above). Recently, I have
been adding more and more code and data to my DSP speech codec and I've been
getting weird problems with the data exchanged
between the ARM and the DSP. For example, I would always get the same exact
data on the output buffer from a call
to SPHENC_process. In attempt to debug the problem, I put a GT_trace call in
my DSP speech codec to print out the data
that was being returned from SPHENC_process so that I can compare it to the
data I saw being returned to on the ARM side.
Weird thing is that by putting GT_trace in the speech codec, the problem went
away (the return data is different each time).
As soon as I comment out the call to GT_trace, the problem came back (ARM side
sees same data being returned).
Am I doing something wrong? Is there a cache cohency problem here? Why does
adding a simple GT_trace fix the problem and
my data looks correct? Instead of GT_trace, I tried putting some hard delays
in an attempt to affect timing but that wouldn't
work, only a call to GT_trace work. I've been on this for several days now.
Please advise. Thanks in advance.
Regards,
Andy
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