The Vivado IDE can be used for planning and visualization tasks. The best example of this is using the Device view to create and modify Pblock constraints for floorplanning.
- Open the synthesized static design and the largest of each RM. Here are the
commands, using the tutorial design (found in the
Design Suite Tutorial: Dynamic Function eXchange (UG947) as an
open_checkpoint synth/Static/top_synth.dcp set_property HD.RECONFIGURABLE true [get_cells inst_count] read_checkpoint -cell [get_cells inst_count] synth/count_up/count_synth.dcp set_property HD.RECONFIGURABLE true [get_cells inst_shift] read_checkpoint -cell [get_cells inst_shift] synth/shift_right/shift_synth.dcp
At this point, a full configuration has been loaded into memory, and the RPs have been defined.
- To create Pblock constraints for the RPs, right-click on an instance in the Netlist window (in this case, inst_count or inst_shift) and select Draw Pblock. Create a rectangle in the Device view to select resources for this RP.
- With this Pblock selected, note that the Pblock Properties pane shows the number of available and required resources. The number required is based on the currently loaded RM, so keep in mind that other modules may have different requirements. If additional rectangles are required to build the appropriate shape (an "L", for example), right-click the Pblock in the Device view and select Add Pblock Rectangle.
- Design rule checks (DRCs) can be issued to validate the floorplan and other
design considerations for the in-memory configuration. To run, select
DFX checks are present (see Floorplan in the Vivado IDE). Note that if
HD.RECONFIGURABLEhas not been set on a Pblock, only a single DRC is available, instead of the full complement shown below.
and ensure the
This set of DRCs can be run from the Tcl Console or within a script, by using the
report_drc command. To limit the checks to the
ones shown here for DFX, use this syntax:
report_drc -checks [get_drc_checks HDPR*]
To extend the DRCs to those checked during specific phases of design processing the
-ruledeck option can be used. For example, the following command can be issued on a placed and routed design:
report_drc -ruledeck bitstream_checks
To save these floorplanning constraints, enter the following command in the Tcl Console:
The Pblock constraints stored in this constraints file can be used directly or can be copied to another top-level design constraints file. This XDC file contains all the constraints in the current design in memory not just the constraints recently added.