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  1. Hi all, I'm having an issue with the FPGA SPI interface I programmed onto my microzed. The issue is that the interface cannot read the data sent back from my slave device! I'm using a SAMA5d3-xplained devboard, and an oscilloscope to measure signals. I made the SAMA return the same buffer it received, only with every byte shifted. So it's a semi-loopback routine. The oscilloscope captures both the correct signal back from the SAMA (every byte divided by 2), AND the signal going into it (out of the MicroZed). However, the spidev_test.c (that seemingly famous SPI testing utility on the torv