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How can i make eim interface with fpga using multiple dma?

Question asked by Hanseung Lee on Mar 6, 2018
Latest reply on Mar 6, 2018 by igorpadykov

Hello everyone!!

 

I have a question.!

 

I want to make interface i.mx6 solo and FPGA use EIM(with sdma).

 

I've already tested with that using eim.

 

But, it is not working very well.

 

                              |      |      |      |      |      |   <= inturrupts (200us interval)

dma channel 0      |-----|

dma channel 1             |-----|

dma channel 2                    |-----|

....   

However, this method did not work well because of the schemeler of dma.

 

How can I make dma without being pushed back to match the interrupt signal?

 

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