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F28M35 Concerto SSI (SPI) with DMA... How to retrigger after first pass



Referring to the demo "ssi_loopback_m3", was integrated into my design.  I was able to get the DMA to send, then looked at my received data, and see data I expected (unparsed).  However,

1.  I can't figure out how to continuously retrigger after this first successful occurrence.  What is the trick?

2.  I want to be able to use a  second DMA channel on serial device using a UART.  Is it possible? how do I do this, and have it retrigger repeatedly as well?