Table of Contents
Document History
Revision | Date | Modification |
1.0.0 | 29/04/2022 | Initial Document |
Related documentation
Reference | Description | Version |
RD1 | NanoXplore_Nxmap_User_Manual_v3.0.5 | V3.0.5 |
RD2 | training package | |
RD3 | training package user manual |
Summary
This document describes how to instantiate an IP into a TOP design with NXMAP using Impulse flow.
Introduction
After compiling a design into NXMAP, it’s on Impulse, it is possible to instantiate this compiled design as an IP into a top design. Nxmap could use the placement of Impulse placement engine uses the compiled IP into in an other design.
How to use preplaced IP
An example is provided in the training package environment. Please refer to RD3.
The preplaced IP testcase is stored to the path below
cd $WORKDIR/trainingpackage/test/PlacingConstraint/Preplace |
Please launch the following commands
nxpython nxpython |
_script.py --argument Preplace |
The command compiles the switch_counter design that it is used as an IP and a top level design, the switch design, that instantiates the switch counter.
...
To add the preplaced IP into the design, add the line below into in constraints file (project_constraints.py) the line below:
p.addBlackBox('switch_counter(*)', 'IP', '../switch_counter_preplaced_NG-MEDIUM.nym', 'g_inst.i_switch_counter_0:2x6') |
switch_counter(*) : VHDL entity name
IP : parameter to indicate that is an IP
switch_counter_preplaced_NG-MEDIUM.nym : it is the file of the IP placement (placed-auto.nym) generated by NxmapImpulse. In the example, it is copied to switch_counter_preplaced_NG-MEDIUM.nym into the workdir of the TOP level design in which where the IP is preplaced
g_inst.i_switch_counter_0:2x6 : instantiated name of the IP and the coordinate of the anchor (column 2 x row 6). Please check that the anchor of the preplaced IP is instantiated correctly, it means that the placement is used using the same kind of ressourcesresources.
The preplaced IP could be instantiate instantiated several times.
p.addBlackBox('switch_counter(*)', 'IP', '../switch_counter_preplaced_NG-MEDIUM.nym', 'g_inst.i_switch_counter_0:2x6;g_inst.i_switch_counter_1:3x6') |
The code source of the preplaced IP has to be removed from the project (project_files.py).
def add_files(p,sources_files_directory,variant,argument): |
NoteNotes:
It’s It is allowed to superpose preplaced IP but the ressources resources have to be sufficient to avoid placement problems or routing problemsissues
Several instances are not supported yet: CDC, CKS, FIFO, XFIFO, CSC, GCK, PLL, WFG, SOC interface, HSSL
IOB and BFR are converted into buffer
The constraintPath is not used with elements into preplaced IP, please make sure that the preplaced IP is optimally constrained