Phase 2: Recompile the AI Engine Application, Package the New System, and Rerun Hardware Emulation - 2023.2 English

AI Engine compilation in phase 1 generates numerous files in the Work directory. The Work/temp/graph_aie_routed.aiecst file contains all the constraints that can be used during AI Engine compilation to get the exact same placement. From this file, extract the constraints related to the PLIO interface nodes, removing the other nodes and all the port constraints:

{
  "NodeConstraints": {
    "DataIn1": {
      "shim": {
        "column": 24,
        "channel": 0
      }
    },
    "clip_in": {
      "shim": {
        "column": 24,
        "channel": 0
      }
    },
    "clip_out": {
      "shim": {
        "column": 25,
        "channel": 0
      }
    },
    "DataOut1": {
      "shim": {
        "column": 25,
        "channel": 0
      }
    }
  }
}

Phase 2 contains the following stages:

1. aie2: As in the previous phase, this stage builds an AI Engine application, but in this case, it uses new interface constraints. The kernel itself has not changed but a kernel location constraint has been added to the graph so that you can see a big difference in the kernel placement. Check this new placement using Vitis Analyzer on the compile summary.

2. package2: Create the PDI to load onto the device (hw_emu).

3. run_emu: Launch the simulation and verify that the output is still correct.

Run make phase2 to go over all steps. Simulation is done in the same way as in phase 1, but it takes more time due to the longer routing path.