1. Objectives 1. Design and Implement our first circuit using VHDL. How to write a structural design. 2. Use the tools that compose the chain from code compilation to the downloading of the produced file to the FPGA.
2. Theory The design of a simple circuit with a VHDL implementation fits an analyze scheme as provided for instance by a MCSE design methodology. Moreovoer, the design of the circuit in terms of functionals blocks fits particularly the architectural writing of VHDL. Once the code written, the designer has to go through a serie of tools to: 1. Get sure of the correctness of both his design and implementation 2. Get an idea of his performances in terms of FPGA space, timing analysis, etc. 3. Get the final file containing all his design including his port mapping to real hardware I/O. Globally this chain can be organized as follow:
MCSE « block » design
Structural VHDL code
compiler (vhdlan) (gvan)
Error Report
simulator (vhdldbx) (vhdlsim)
Timing diagram
Design Analyzer (design_analyzer)
Circuit diagram
Synthesis Tool (dc_shell)
Downloader (dsgnmgr)
Configured FPGA
Synthesis Report Synthesized File
*.bit
3.Design Approach My block/VHDL design is the following:
buff1
Buff1 in(4bits)
buff4
out(4bits)
mux41
out
buff1 sel (2bits) buff1
enable
mayor
This design can be viewed in the files buff1.vhd, buff4.vhfd, mux41.vhd, mayor.vhd provided in appendix. No error is produced by the compiler (gvan). There is no particular design issue except the main data line which has to be of type std_logic to provide 3-states logic. So only « sel » and « enable » are of bit logic, « in », »out4 » and « out » are std logic.
4. The Simulation The complete simulation of mayor.vhd with the Synopsys VHDL simulator can be seen in the appendix. The functionnment is as expected for all the cases that should be needed.
5. Synthesis This code is synthesizable as it only uses synthesizable VHDL keywords and structures. The Synopsys Design Analyzer hence doesn't complain as expected. We also make use of a dc_shell script also provided in the appendix. Note that as we use mutliple instances of a component we have to use the uniquify command to create a unique design for each cell instance.
6.Hardware Implementation Once synthesized, our code can be implemented by the Xilinx place and route software and then downloaded to the card with the hardware debugger. The final on-board behaviour is as expected if we exclude the fact that the result LED is active low and not active high as expected by our VHDL code. So the result led is inverted to our initial expectation.
7. Conclusion Even though a long serie of software are provided between the VHDL code and the final configured FPGA we can go through them in a pretty straightforward manner. Moreover it provides us with a serie of tests on our code and design.
An ALU (Arithmetic and Logic Unit) is a circuit that does the mathematical operations inside a CPU. It generally operates on 2 operands and control signals ...
Nov 27, 2017 - When you log in to the Remote Labs web interface at h ... you will get the following security error. ... with the trust splash screen Social Miner.
focaux (mise au point ne change pas lorsqu'on change d'objectif). L'objectif .... Pour ne pas perdre de points techniques: ... mm) de la pointe et jetez le reste. 8.
Nov 27, 2017 - In this lab, you will configure Call Recording. The Finesse Desktop ... Communica ons Manager for IP Communicator devices may change, requiring updates in order to properly ... We have provided icons for Firefox, Chrome, and Internet E
Apr 24, 2007 - ... plunging 37 degrees, and plot the plane p2 having this line as a pole. 11. Cross product of two unit vector (carried by respectively l1 and l2).
specify SYSLOG message des na ons for remote server monitoring to perhaps Solarwinds, HP. OpenView or a host of other third party syslog servers. SYSLOG ...
11 juin 2015 - Table des matières. 3. Création de compte. 4. Connexion à l'application. 5. Paramètres utilisateur. 6. Liste des projets. 7. Tableau de bord. 8.
National des Arts et Métiers. (CNAM) – a well-renowned. University, founded during the. French Revolution in order to democratise access to know- ledge and ...
II. Reading 1: A visual language for querying and updating graphs. 1) For a given query, can you have several matches? Explain why using the word subgraphs.
Nov 27, 2017 - you have used a reset point to work on a specific lab within a .... lab reset is complete, it may take a few addi onal minutes for the Cisco Tomcat.
The BCI system described in this study is based on the P300 speller BCI ... within the Open-ViBE project (grant ANR05RNTL016) and by CEA/DRT. (Grant ACAV ..... In this section, the database used to test the proposed algo- rithm and the .... Nc symbol
transmitted by wireless devices. Students will also convert all radio frequency (RF) signal ratings into a common decibel (dB) unit in order to calculate power ...
29 janv. 2017 - Appel à participation - LAB de création et de fabrication numérique ... mènera cette co-création au côté du designer Bruxellois Damien Gernay.
Processeur. Mémoire annexe externe. Interface de communications locales ... protection mémoire. Générateur de clefs. Interface mémoire de configuration.