Step 2. Add PL Kernels - 2022.2 English

In this example, HLS kernels are used which bridge between memory and the AXI4-Stream interface to input and output data from memory.

• The mm2s kernel reads data from memory and inputs it to the AI Engine array.

• The s2mm kernel receives output data from the AI Engine array and writes it to memory.

1. Open the Vitis IDE and select the same workspace as the AI Engine application project. Right-click the simple_application_system project and select Add Hw Kernel Project.

2. Name the project hw-kernels and click Finish to create the project.

3. Right-click the hw-kernels project and click import sources. Browse into the src folder and select the mm2s.cpp and s2mm.cpp files.

4. In the hw-kernels.prj page, click on the lightning icon (Add HW function) icon and select both functions (mm2s and s2mm) as hardware functions.