Controlling the AI Engine Graph with the XRT C++ API - 2022.1 English

As stated in the previous section, XRT provides C and C++ APIs through the header file experimental/xrt_graph.h to control the AI Engine graphs.

XRT provides class graph in the name space xrt and its member functions to control the graph. Example code to control the AI Engine graph using the XRT C++ API is as follows:

using namespace adf;
// Open xclbin
auto device = xrt::device(0); //device index=0
auto uuid = device.load_xclbin(xclbinFilename);
auto dhdl = xrtDeviceOpenFromXcl(device);
...
int coeffs_readback[12];
int narrow_filter[12] = {180, 89, -80, -391, -720, -834, -478, 505, 2063, 3896, 5535, 6504};
int wide_filter[12] = {-21, -249, 319, -78, -511, 977, -610, -844, 2574, -2754, -1066, 18539};
auto ghdl=xrt::graph(device,uuid,"gr");
ghdl.update("gr.fir24.in[1]",narrow_filter);
ghdl.run(16);
ghdl.wait();
ghdl.read("gr.fir24.inout[0]",coeffs_readback);//Read after graph::wait. RTP update effective
ghdl.update("gr.fir24.in[1]",wide_filter);
ghdl.run(16);
ghdl.read("gr.fir24.inout[0]", coeffs_readback);//Async read
ghdl.end();