Design Flow

The development of the Versal on the SC-OBC Module V1 can be carried out in two ways: using the Vivado GUI or using the command-line flow with RTL and Tcl scripts.

The Makefile included in the development environment provides two main targets: create_versal_ps_bd and build_fpga.

The following diagram illustrates the primary development flow for the SC-OBC-V1 FPGA.

sc-obc-v1-fpga-design-flow
Figure 1. SC-OBC Module V1 FPGA Design Flow

GUI Design Flow

This method uses the Vivado GUI for design work. First, run the create_versal_ps_bd target, then open and modify the Vivado project as needed.

The project can be opened using the following commands:

cd versal/work/implement
vivado project/sc_obc_v1_versal.xpr

After completing the design in Vivado, close the application and run the build_fpga target. This will export the .pdi and .xsa files generated from your design.

When using this flow, running make clean will remove the generated design files. If you perform design work in the GUI, it is strongly recommended to migrate your changes into scripts.

CLI Design Flow

This method uses RTL and Tcl scripts for design. The create_versal_ps_bd target includes entry points for loading RTL files and executing user scripts.

The following files are provided for users to add RTL or Tcl-based design logic:

  • rtl/user_rtl.list Lists the user RTL files to be loaded by Vivado. Any RTL added to this file is automatically included during the build.

  • script/implement/user_bd_logic.tcl A Tcl script for applying custom logic to the Block Design hierarchy. This script is executed at the end of the Block Design generation process.

  • constraints/sc-obc-v1-versal-user-io.xdc Constraint file for user-defined I/O. Used to specify pin assignments, pad numbers, I/O buffer configurations, drive strengths, and other I/O-related settings.