DMA with VLYNQ on DM648

RP said:

I've got  two DM648 connected via VLYNQ ( custom board ).

I've got the communication between them working , but only with CPU driven memory copies

i.e I can copy data ( memcpy)  into the VLYNQ memory space on one DSP , and I can see that data on the other DSP.

If i try to replace the memcpy with a EDMA , the EDMA completes ( i.e get the TCC),  but the data doesn't get  to the other device .

Has anyone tried using EDMA to transfer data into the VLYNQ address space ?

Which TC are you targeting with the transfer?  The reason I ask is that TC3 does not have a connection via the Switched Central Resource to the VLYNQ peripheral.  This is indicated in Table 4-1 of the TMS320DM648 datasheet (SPRS372).