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Please help to choose an appropriate DSPLINK module

Other Parts Discussed in Thread: OMAP-L138, OMAP-L137

Hi everyone!

My board is based on OMAPL-137, Montavista Linux 5.0 and is expected to control our active magnetic bearing plant. I use one UART as console and one UART to transfer data from the board to host PC. In addtion, I use LabVIEW on host PC to control the process, display waveform and store data.

The basic procedure is first to process AD conversion to acquire current voltage of each channel(on DSP side), then to process the data through DSP, third to process DA conversion. If the host PC send a command (send a predefined char through serial port) to acquire waveform, the DSP sends AD data of previous period(s) to GPP side though DSP/LINK module. However, during the data sending to GPP, DSP should continue to process AD and DA and should not wait untill the data sent.

Now I've edited the LOOP example(task mode on DSP side) to implement the above procedure but I met 2 serious problems. First, when DSP sent a full buffer to GPP, it must wait untill receiving a data. Second, when I operate the program for a long time it will halt.

So I want to know which DSPLINK module should be best suited the procedure,message,mpcs or ringio?