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EDMA conflict with DSPLINK on EVMOMAPL137

I am working with EVMOMAPL137. I want to customize the readwrite sample that uses DSPLINK. I write a program on DSP side that use EDMA. If I configure and use the EDMA before DSPLINK initialization all things are OK. However, when I want to set source, destination, and indexes for EDMA after DSPLINK init the driver functions are returned with error and EDMA does not work. What is the problem? I think DSPLINK initialization has effect on EDMA configuration. What should I do?????