integrated circuits laboratory faculty of engineering digital design flow using mentor graphics...
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Integrated Circuits Laboratory
Faculty of Engineering
Digital Design Flow Digital Design Flow Using Mentor Graphics ToolsUsing Mentor Graphics Tools
Presented by: Sameh Assem Ibrahim 16-October-2003
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2/36 Integrated Circuits Laboratory
Faculty of Engineering
ObjectivesObjectives
Learn the digital design flow starting from VHDL down to physical device verification.
Be familiar with the basics of downloading a design into an FPGA and testing it.
Learn Mentor Graphics Tools:
- FPGA Advantage 5.x : - HDL Designer Series (Design Entry)
- ModelSim (Simulation)
- Leonardo Spectrum (Synthesis)
Learn Xilinx Tools:
- ISE Alliance (Placement and Routing)
- iMPACT (Design Downloading into FPGA)
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3/36 Integrated Circuits Laboratory
Faculty of Engineering
Digital Design FlowDigital Design Flow
HDL Designer Series
(Design Entry)
Download design to FPGA chip Design Architect
(Schematic editing)
ENIREAD & SG(Format conversion)
(Schematic generation)
Xilinx Alliance(FPGA Implementation)
ModelSim
(VHDL Simulation)
FPGA ASIC
Leonardo Spectrum(FPGA or ASIC synthesis)
VHDL netlist and SDF file for timing simulation
VHDL netlist & VITAL Post synthesis verification
Testing
fail
fail
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4/36 Integrated Circuits Laboratory
Faculty of Engineering
Digital Design FlowDigital Design Flow
ASIC
GDSII format to foundry
Mach TA/PA(Timing and Power
analysis)
QuickSim(Digital simulation
with delays)
SPICE netlist
IC station(Autoplace, Autoroute, DRC, LVS, netlist and parasitics extraction)
DVE(Viewpoints generation)
fail
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5/36 Integrated Circuits Laboratory
Faculty of Engineering
Design EntryDesign Entry
Using HDL Designer Series.
First step is to create a design library.
Design entry can either be Top-Down or Bottom-Up.
Five different design entry methods are available:
- VHDL / Verilog
- Truth Table
- Flow Charts
- State Machines
- Block Diagrams
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6/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating the Design Library (1)Creating the Design Library (1)
Design Entry
1. Run HDL Designer Series:
> Start > All Programs > FPGA Advantage 5.x > Design > HDL Designer
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7/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating the Design Library (2)Creating the Design Library (2)
Design Entry
Library Folder
Library Name
Press OK and Open Library to create designs
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8/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating the DesignCreating the Design
Design Entry
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9/36 Integrated Circuits Laboratory
Faculty of Engineering
VHDL Entry (1)VHDL Entry (1)
Design Entry
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10/36 Integrated Circuits Laboratory
Faculty of Engineering
VHDL Entry (2)VHDL Entry (2)
Design Entry
Entity Name
Library Name
Architecture Name
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11/36 Integrated Circuits Laboratory
Faculty of Engineering
VHDL Entry (3)VHDL Entry (3)
Entity is written here
Architecture is written here
Design Entry
Save
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12/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (1)Truth Table Entry (1)
Blue = Input
Yellow = OutputRight click to add or remove columns
Design Entry
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13/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (2)Truth Table Entry (2)
Design EntryEnter required inputs and outputs
Save
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14/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (3)Truth Table Entry (3)
Design Entry
Library NameEntity Name
Architecture Name
Yet an entity is still required
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15/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (4)Truth Table Entry (4)
Design Entry
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16/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (6)Truth Table Entry (6)
Design Entry
Library Name
Truth Table Entity Name
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17/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (7)Truth Table Entry (7)
Design Entry
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18/36 Integrated Circuits Laboratory
Faculty of Engineering
Truth Table Entry (8)Truth Table Entry (8)
Generate HDL
Design Entry
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19/36 Integrated Circuits Laboratory
Faculty of Engineering
Flow Chart EntryFlow Chart Entry
Design Entry
Save
Generate HDL
Flow
End Point
Action
Stat Point
An Entity is required
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20/36 Integrated Circuits Laboratory
Faculty of Engineering
State Diagram EntryState Diagram Entry
Mainly Used for Controllers (Finite State Machines “FSM”)
Design Entry
Add state Start state
1st one added
Double click to add action
Double click to add transition condition
Add transition
Generate HDL
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21/36 Integrated Circuits Laboratory
Faculty of Engineering
Block Diagram Entry (1)Block Diagram Entry (1)
Design Entry
Block Diagram Editor
Adding a block (for Top-Down designs)
Adding a component (for Bottom-Up designs)
Adding a moduleware (a library of VHDL blocks)
ConnectorsI/O ports
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22/36 Integrated Circuits Laboratory
Faculty of Engineering
Block Diagram Entry (2)Block Diagram Entry (2)
Adding a component
Design Entry
Browse for your libraries here
Browse for your components here
Then drag to your Block diagram
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23/36 Integrated Circuits Laboratory
Faculty of Engineering
Block Diagram Entry (3)Block Diagram Entry (3)
Adding a modulware
Design Entry
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24/36 Integrated Circuits Laboratory
Faculty of Engineering
Block Diagram Entry (4)Block Diagram Entry (4)
Design EntryExample of a Block Diagram
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25/36 Integrated Circuits Laboratory
Faculty of Engineering
Test BenchesTest Benches
Test benches are generated automatically as a block diagram with a tester and a block under test.
The tester is a VHDL file with the entity already specified, only the test waveforms are required.
Design Entry
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26/36 Integrated Circuits Laboratory
Faculty of Engineering
SimulationSimulation
Using ModelSim.
The created testbench can be used.
Test Waveforms can be created within the program.
Outputs can be checked either as waveforms or as a list of numbers.
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27/36 Integrated Circuits Laboratory
Faculty of Engineering
Starting ModelSimStarting ModelSim
Select the design to be simulated and then press
Compilation is done and then ModelSim starts.
Simulation
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28/36 Integrated Circuits Laboratory
Faculty of Engineering
ModelSim WindowsModelSim Windows
Simulation
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29/36 Integrated Circuits Laboratory
Faculty of Engineering
Using ModelSim (1)Using ModelSim (1)
Simulation
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30/36 Integrated Circuits Laboratory
Faculty of Engineering
Using ModelSim (2)Using ModelSim (2)
Simulation
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31/36 Integrated Circuits Laboratory
Faculty of Engineering
Using ModelSim (3)Using ModelSim (3)
Simulation
Select a signal and either use Force for a specific input or Clock for a periodic signal
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32/36 Integrated Circuits Laboratory
Faculty of Engineering
Using ModelSim (4)Using ModelSim (4)
Simulation
Time of simulation in ns
Run simulation
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33/36 Integrated Circuits Laboratory
Faculty of Engineering
SynthesisSynthesis
Using Leonardo Spectrum.
A technology dependent step.
Either ASICs or FPGAs can be targeted.
Various output formats can be obtained (VHDL/SDF/EDIF)
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34/36 Integrated Circuits Laboratory
Faculty of Engineering
Running Leonardo SpectrumRunning Leonardo Spectrum
Synthesis
Click on the synthesizer button
Select your designunit
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35/36 Integrated Circuits Laboratory
Faculty of Engineering
Adjusting Synthesis FlowAdjusting Synthesis Flow
Synthesis
Choose yourdevice family
Choose yourdevice
Choose yourspeed grade
Choose yourwiring table
Choose what tooptimize for andwhether topreservehierarchy or not
Check insert I/0 pads
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36/36 Integrated Circuits Laboratory
Faculty of Engineering
Generating the EDIF FileGenerating the EDIF File
SynthesisPress Run Flow
The EDIF file is created in this path
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37/36 Integrated Circuits Laboratory
Faculty of Engineering
Other Outputs (1)Other Outputs (1)
SynthesisRTL Schematic Technology Schematic
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38/36 Integrated Circuits Laboratory
Faculty of Engineering
Other Outputs (2)Other Outputs (2)
Synthesis
VHDL & SDF Area Report
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39/36 Integrated Circuits Laboratory
Faculty of Engineering
Xilinx ISE4.2i FlowXilinx ISE4.2i Flow
The input to the flow is the EDIF file from Leonardo Spectrum.
The output is a bit file to be downloaded into the FPGA.
Steps are:
- Mapping the design blocks into the FPGA design units.
- Placement and Rouing of these units.
- Genration of the bit file and downloading it to the FPGA.
An FPGA programmer kit must be present, connected to the PC and with a manual at hand to know pins configuration.
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40/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating a New Project (1)Creating a New Project (1)
Design Implementation
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41/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating a New Project (2)Creating a New Project (2)
Design Implementation
Insert the nameof the project
Insert the path you want to createthe project in
Add data related to device family,the device itself, and the design flowused
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42/36 Integrated Circuits Laboratory
Faculty of Engineering
Creating a New Project (3)Creating a New Project (3)
Design Implementation
Choose whether to add the EDIFnetlist or to add a copy from it
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43/36 Integrated Circuits Laboratory
Faculty of Engineering
Implementing the DesignImplementing the Design
Design Implementation
There are 3 steps for implementing the design:
1. Translating the EDIF netlist into primitives.
2. Mapping these primitives into their technology dependent counterpart.
3. Placing and routing these technology primitives.
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44/36 Integrated Circuits Laboratory
Faculty of Engineering
Translating the Design (1)Translating the Design (1)
Design Implementation
Translates the EDIF and gives a report declaring success of translationor gives warnings and errors.
Generates a post translation modelthat can be in VHDL format fora first step back annotation
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45/36 Integrated Circuits Laboratory
Faculty of Engineering
Right click on this tab
Choose properties
Translating the Design (2)Translating the Design (2)
Design Implementation
Choose VHDL Format
VHDL File Name
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46/36 Integrated Circuits Laboratory
Faculty of Engineering
Mapping the DesignMapping the Design
Design Implementation
Maps the primitives into technology primitives and generates a report.
Generates a VHDL as before.
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47/36 Integrated Circuits Laboratory
Faculty of Engineering
Placement and Routing of the Placement and Routing of the DesignDesign
Design Implementation
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48/36 Integrated Circuits Laboratory
Faculty of Engineering
Programming the FPGAProgramming the FPGA
Design Implementation
Generates the programming bit file for the FPGA
Generates a file to be loaded into the PROM (if present in the kit)
Downloads the design into the FPGA(iMPACT software)
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49/36 Integrated Circuits Laboratory
Faculty of Engineering
ThanksThanks
Special thanks go to1. Eng. Sameh Talal (Aiat Co.)2. Eng. Ahmed Mohsen
For their help in preparing the material for this presentation.