Question About C6713 DSP EDMA

Hi All ,

Can any one with experience with TI C6713 help me understand EDMA
operation. I am using the C6713 DSK with AIC23 codec on board.

I am using the dsk_app application from the example directory of the
CCS installation.

The example runs out of the box i.e. EDMA ISR was hit both for RX and
TX transfer completion. I also put a sine wave in the line in and
varified a sine wave on the line out.  In order to understand the
working I started making changes to the project.

I started out by changing the Memory section Manager in the DSP/BIOS
configuration file  and observed a starange

behaviour : When I placed the  all the memory sections in the SDRAM
instead of IRAM section only the TX transfer completion interrupt were
generated.  But when I places the .text section back into IRAM , the
program started working as before.

Has any one seen this behaviour ? Can you explain the reason for
this ?

BR
Niladri Bose