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Frozen source mode in SDMA ( imx51)

Question asked by Peter Kozakiewicz on Jul 25, 2016
Latest reply on Jul 25, 2016 by igorpadykov

Hi all, 


I want to realize the following scenario:

A FPGA module connected via EMI has a few FIFOs ( 16 bit ) in output ( schema in attachment ). Each of them has its own address and queue with length = x. When the queue reaches size = y ( y < x ), an interrupt is raised and the data are copied into circular buffers in IMX memory. I want to realize it using SDMA module.

In this moment I can copy the data in incremental mode but I need to freeze source (FIFO) address and increment only destination.

Any help will be appreciated.

Thank you in advance,