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Starting Your Own Custom Logic (CL)

Table of Content

  1. Install HDK
  2. Create new CL Directory and Setup Environment
  3. Modify Build Scripts

1. Make sure you have the FPGA HDK installed and the environment variables set up

In case you haven't cloned AWS FPGA HDK+SDK, please follow the next steps to download and configure the HDK to the source directory on the instance:

$ git clone https://github.com/aws/aws-fpga
$ cd aws-fpga
$ source hdk_setup.sh

2. Create a new CL directory, environment variable, and reference directory structure

The developer has two ways to start a new Custom Logic design:

  1. Copy one of the example directories from $HDK_DIR/cl/examples to $HDK_DIR/cl/developer_designs, and make sure to update the $CL_DIR environment variable to point to the new design:

    $ cd $HDK_DIR/cl/developer_designs
$ cp -r $HDK_DIR/cl/examples/<example> .
$ export CL_DIR=$(pwd)

  2. Setup a new CL directory from scratch:

    $ cd $HDK_DIR/cl/developer_designs
$ mkdir <Your_New_CL_Directory>
$ cd <Your_New_CL_Directory>
$ export CL_DIR=$(pwd)
$ source $HDK_DIR/cl/developer_designs/prepare_new_cl.sh

Setting up the $CL_DIR environment variable is a must as the build scripts rely on that variable.

The prepare_new_cl.sh will setup the directory structure to match what's expected by the HDK simulation and build scripts. Execute source $HDK_DIR/cl/developer_designs/prepare_new_cl.sh from within the directory you want to use for your CL development.

In both cases, double-check that the $CL_DIR is set correctly by calling and checking the result of:

$ echo $CL_DIR

3. Modify the build scripts

The following scripts should be modified before starting the build:

  • /build/constraints/*
    • This is to set all the timing, clock and placement constraints.
  • /build/scripts/encrypt.tcl
    • CL Encryption is NOT required, but encouraged. To enable encryption, include the source file names.
  • /build/scripts/create_dcp_from_cl.tcl
    • This is to update the final build scripts with right source files and IP.

Once your design is ready, please refer to this checklist before starting the build process.

Once you verified the checklist, the detailed walk through on how to build and submit the CL to AWS is available here