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Example pin assignments in the Pin Planner
  • Now that we have finished assigning pins, we can go back and run the complete compilation process. Double click on Compile Design in the Tasks menu of the Project Navigator to run all of the sub tasks. Inevitably, you will get warnings about some features not being available without a subscription and there not being a clock, since we didn’t need one. Also, you will get critical warnings telling you that a specific design file is needed for the Timing Analyzer. These extra features are not required and these warnings can be ignored.

Waveform simulation

  • Before actually programming the FPGA on the board, it is a good idea to simulate a variety of inputs to our circuit and check the responses. Although the ability to simulate inputs to circuits was removed from Quartus II beginning with version 10.0 , these features can still be used with the Altera University Program Simulator .
  • Opening the Altera U.P. Simulator should open two windows, the U.P simulator and Qsim. Go to Qsim, select File->Open Project, and select your .qpf project file for the 2 bit mux. Next go to File->New Simulation Input File to open up the Simulation Waveform Editor.
  • Right click in the white space under the Name heading and select Insert Node or Bus. From this window click the Node Finder button. Finally, click the List button to have the Waveform Editor import the I/O ports from the project file. Move all of these nodes over to the Selected Nodes box and return to the Waveform Editor Window which should now list these I/O ports along the left side. By clicking and dragging the name of a signal you can rearrange the order they are displayed in, useful for separating the input and output signals. Go ahead and save the waveform file in the project folder for the 2 bit mux.
Simulation Waveform Editor Window
  • To begin with, all inputs are set to a constant value of 0 and the output is undefined since we have not yet run the simulation. Note the timing intervals displayed along the top. These are not as important now, but will be very useful once we start building project with clocks.
  • To change the value of an input, click and drag along a waveform to select one or more intervals. Once selected, you can change the highlighted interval with buttons in the toolbar to set intervals low, high, undefined, opposite of their current value and several other options. For the purposes of testing all possible input combinations, we can either manually set the intervals or use the “Overwrite Clock” button to set up several alternating signals of differing periods.
  • For starters select the entire data1 signal by clicking the name and then click the Overwrite Clock button. The Waveform Editor should have defaulted to a total time of 1000ns so set the period of this signal to be 250ns. Select the data2 signal and give it a signal with a period of 500ns and then a signal with period of 1000ns for select. Over the 1000ns of the simulation, this will test all the possible input combinations. Once finished save this waveform file and return to Qsim.
Waveforms to test all input combinations
  • Go to Assign->Simulation Settings. The Waveform Simulator supports two modes: Functional, where only the logic of the system is tested and timing is not considered, and Timing, where delays and other timing constraints are taken into account. In order to perfom Functional simulation you must first go to Processing->Generate Simulation Netlist, but for now we’ll just do a Timing simulation. In the Simulation Settings box make sure Timing is selected and then browse for the waveform file you created.
  • Finally go to Processing->Start Simulation or click the blue arrow over the waveform. The simulator will run and once finished it will open up waveform window containing your specified input waveforms and the resulting output. Once you are satisfied with the results or have made the necessary changes, we can move to the final step, programming the board.

Simulation Output

Programming the board

  • Now that we are certain our project will function as intended, we can program our FPGA. Make sure that the DE0 board is plugged into the computer and powered on. The DE0 offers two modes of programming: one which retains the program in volatile memory only as long as the board is powered on and another which stores the program in non-volatile memory to be retrieved when the board is powered on. For our purposes the volatile memory storage will be sufficient. To set the board for this programming method, make sure the switch next to the 7 segment display is set to RUN.
  • In the Tasks menu below the Analysis&Synthesis and Compile Design commands we used earlier, click on Program Device. Next to Hardware Setup should be listed USB-Blaster [USB-0]. If not, click on Hardware Setup and select USB Blaster from the drop down menu. Make sure that Mode is set to JTAG and that the Program/Configure box next to the .sof file is checked.
  • Once ready click Start and wait for the board to be programmed. You can see the state of the programming process in the message bar where it will inform you once it’s finished. If you followed the same structure as the tutorial, SW0 should serve as the select switch with SW1 and SW2 toggling the two data inputs high or low. With select in a low state, the mux will take the value from SW1 and in a high state the value from SW2, either of which will be output on LEDG0.
  • This concludes the tutorial on Quartus projects. It should now be a simple matter to create a 4-bit mux and move on to the rest of the projects.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Intro to computational engineering: elec 220 labs. OpenStax CNX. Mar 11, 2013 Download for free at http://cnx.org/content/col11405/1.2
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