i transfer bursts of data from PL to PS via dmac fifo interface. To make sure the first word of the burst is the first word in the receive buffer, i assign the fifo_wr_sync signal together with the fifo_wr_en signal on the first word of each burst. What i am missing now is a signal from dmac to see which burst is the first one which the software receives after requesting a transfer via iio_readdev. The goal is to start a frame counter in the PL with that signal. Is there a signal in the dmac which i can use for that?