dma pingpong mode

hai

          i am using the tms320vc5505 usbstick . i selected the chip support library c55xx   csl 2.50.0 . when i try to run the csl_dma_pingpongexample . i find that the

ping set transfer is complete. and waiting for the pong set interrupt to occur and it never occurs .

in the csl_general.h  i has uncommented the #define chip_5505 and i commented the #define chip for c5515 and c5514 .and in the main program i defined for chip_5505

and also in the csl_dma.c and csl_dma.h and i find it that the pingpong mode does not work.

when i run the example  without changing or uncommenting the chip version  . i found the same results.

with regards

seeni