I need to connect a SHARC 21368 to a Blackfin 561. I have existing code for the '368 which runs in half-duplex mode very well. I'm planning to connect the BF561 in the same way by shorting the TX and RX port pins together (CLK-CLK, Frame-Frame, etc). Anyone see a problem with this? I haven't yet written the BF561 SPORT drivers to handle this, but I think it should work.