Msgdma csr status - Altera SoC Workshop Series - Lab 4: Linux FFT Application

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Msgdma csr status - Altera SoC Workshop Series - Lab 4: Linux FFT Application

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I am trying to run example from https://rocketboards.org/foswiki/view/documentation/socswws1introtoalterasocdeviceslab4linuxfftapplication on DE1-SoC board. My qsys looks similiar to that in tutorial. When i run application i can see that "sgdma from fft" descriptor buffer is all the time empty, csr status is 2000 (should be 2) and control is 402000. What this csr status means? Where is the problem? Csr status for sgdma to fft is 2.

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