Hi Ming,
Thanks for your post.
Have you set the XDMAERR/RDMAERR flags in the XSTAT/RSTAT register? If not, please try setting to assert any transmit/receive DMA error if any? Please refer sections 3.3.2, 3.6.4 & 3.6.5 in the C672x McASP reference guide as below:
http://www.ti.com/lit/ug/spru878b/spru878b.pdf
Note: To perform internal transfers through the dMAX port, clear XBUSEL/RBUSEL bit to 0 in the respective XFMT/RFMT registers. Failure to do so will result in software malfunction.
Thanks & regards,
Sivaraj K
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