Controlling the AI Engine Graph with the XRT API - 2020.2 English

A Xilinx provided OpenSource XRT API can also be used for controlling execution of PL kernels inside the graph and AI Engine graph when programming the host code for Linux. Controlling PL kernels inside the graph is similar with controlling PL kernels outside the graph. To control the AI Engine graph, XRT provides APIs through the header file experimental/xrt_graph.h.

Example code to control the AI Engine graph using the XRT API is as follows:

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};
    xrtGraphOpen(dhdl,top->m_header.uuid,"gr");
    if(!ghdl){
    int size=1024;
    xrtGraphUpdateRTP(ghdl,"gr.fir24.in[1]",(char*)narrow_filter,12*sizeof(int));
    xrtGraphRun(ghdl,16);
    xrtGraphWait(ghdl,0);
    xrtGraphUpdateRTP(ghdl,"gr.fir24.in[1]",(char*)wide_filter,12*sizeof(int));
    xrtGraphRun(ghdl,16);
    ......
    xrtGraphEnd(ghdl,0);
    xrtGraphClose(ghdl);