Create a new Pblock
Syntax
create_pblock [‑quiet] [‑verbose] <name>Returns
New pblock object.
Usage
| Name | Description |
|---|---|
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
<name>
|
Name of the new pblock |
Description
Defines a Pblock to allow you to add logic instances for floorplanning purposes.
You can add logic elements to the Pblock using the add_cells_to_pblock command, and then place the Pblocks onto the fabric of the FPGA using the resize_pblocks command. The resize_pblock command can also be used to manually move and resize Pblocks.
You can nest one Pblock inside another for hierarchical floorplanning using the set_property command to define the PARENT property as shown in the second example.
Arguments
-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
set_msg_config command.
<name> - (Required) The name of the Pblock to be created.
Examples
The following example creates a Pblock called pb_cpuEngine, and then adds only the leaf-cells found in the cpuEngine module, clearing placement constraints for placed instances:
create_pblock pb_cpuEngine
add_cells_to_pblock pb_cpuEngine [get_cells cpuEngine/*] \
-add_primitives -clear_locsThe following example shows nesting Pblocks, by creating Pblocks called pb_usbEngine0 and pb_usbEngine1, and a third Pblock called pb_usbTop. Then pb_usbEngine0 and pb_usbEngine1 are nested inside pb_usbTop using the set_property command:
create_pblock pb_usbEngine0
create_pblock pb_usbEngine1
create_pblock pb_usbTop
set_property PARENT pb_usbTop [get_pblocks {pb_usbEngine?}]