watch these 3 videos:
the first is how to make, implement and access an HLS IP
2nd is how to make and implement an HLS AXI-stream IP with AXI-DMA
3rd is how to use it in python on the PS
before calling the DMA.wait() functions, be sure to start the IP by writing 0x01 to adress 0x00 of the IP core (HOG_accel.write(0x00,0x01) )