PS Application and HW Emulation Flows - 2023.2 English

The difference in the PS application from Buffer Based AI Engine Kernels is that the input buffers and output buffers for different data types should be modified accordingly. Take a look at the code in sw/host.cpp. Note how float and complex type (for cint16) is used in the code.

    // output memory
    xrtBufferHandle out_bo3 = xrtBOAlloc(dhdl, mem_size, 0, /*BANK=*/0);
    xrtBufferHandle out_bo4 = xrtBOAlloc(dhdl, mem_size, 0, /*BANK=*/0);
    float *host_out3 = (float*)xrtBOMap(out_bo3);
    std::complex<short> *host_out4 = (std::complex<short>*)xrtBOMap(out_bo4);
    
    // input memory
    xrtBufferHandle in_bo3 = xrtBOAlloc(dhdl, mem_size, 0, /*BANK=*/0);
    xrtBufferHandle in_bo4 = xrtBOAlloc(dhdl, mem_size, 0, /*BANK=*/0);
    float *host_in3 = (float*)xrtBOMap(in_bo3);
    std::complex<short> *host_in4 = (std::complex<short>*)xrtBOMap(in_bo4);

Correspondingly, the pre-processing and post-processing of this data has been changed.

1. Run HW emulation with the following ``make` command to build the HW system and host application.

   make run_hw_emu
   

   Tip: If the keyboard is accidentally hit and stops the system booting automatically, type boot at the Versal> prompt to resume the system booting.

2. After Linux has booted, run the following commands at the Linux prompt (this is only for HW cosim).

    mount /dev/mmcblk0p1 /mnt
    cd /mnt
    export XILINX_XRT=/usr
    export XCL_EMULATION_MODE=hw_emu
    ./host.exe a.xclbin
   

   To exit QEMU press Ctrl+A, x.

3. To run in hardware, first build the system and application using the following make command.

   make package TARGET=hw
   

4. After Linux has booted, run the following commands at the Linux prompt.

    mount /dev/mmcblk0p1 /mnt
    cd /mnt
    export XILINX_XRT=/usr
    ./host.exe a.xclbin
   

The host code is self-checking. It will check the correctness of output data. If the output data is correct, after the run has completed, it will print:

    TEST PASSED