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Welcome to live classics the final lab of course the multiplier.

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Now at this time you guys are probably pros and I only need to go through describing the shows even

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if you probably already have it working on your board.

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However I will still go through and show you my version of the multiplier.

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Now about you guys but this is a lot of fun for me so I hope that maybe someday we could another course.

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I hope you guys go out and start teaching courses of your own.

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I don't know that I could VHDL for days if you're really bored let's go.

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All right.

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Here it is.

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Laughs 6.

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The final lab multiplier running on bases to board and from the file I gave you.

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He will have input 1 and input 2 which are indicated by these by Ace which is divided.

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Here is the first four on the right and one second for our input two.

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However it doesn't matter because we're multiplying and as you know you must play by the time they get

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the same result and the product is all one the occasion is indicated by these eight ladies here.

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And then we got this button right here starter which indicates for us to go and do multiplication and

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reset here on the far right.

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So I'm I going to give you a quick penetration how this should look run on your board.

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So for example here right now I've got all zeroes which is zero.

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So I should get a 0.

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Now what I'm going to get in one.

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However my input 2 is still zero one time zero should still be zero.

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Which is as we see there now input 2.

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I'm going to go ahead and make that one.

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And we should see a single Elodie light up right there which is a binary indication of the number one

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and we do.

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And suffice it to say again it's the same thing.

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I can toggle that down which is now zero times when we get to zero.

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However if I start it up again.

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Give us one our reset is used to clear that so I can go ahead hit the reset button and instantly clear

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is that.

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Now does the difference between this reset and the resets and the other lapse is that this reset isn't

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indicated in the clock process.

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We aren't manually inflame the thought process.

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The clock is running at 50 megahertz.

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So as soon as I hit that it instantly picks it up and knows that OK this is very sad.

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So you go through you can do different variations and I'll do two.

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Two times one is me evaluate two or two three times one is you guys three sorry three times three which

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gives you a value of nine which you see there are binary 1 0 0 1 which is the binary value of 9.

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So you can go through it and you can do all of these here and I'll still solve your situation which

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is I don't even know what that is on me.

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But that's a big number.

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So you can go ahead.

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This calculator out and test it.

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And if the values are multiplying against each other or showing up there in binary you're getting correct

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results then your life is working correctly.

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And the reason we do this is because FPGA is by nature really are not designed for for most application

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that's easy on the bases to board only has four dedicated multipliers and there are 18 bits wide.

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So if you have an algorithm you want to run where you've got 20 bets you multiply by 20 bets.

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You can't really do that unless you know how to do this type of multiplication which seems a lot more

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complicated but because you just keep shifting and adding and shifting and adding But you know we can

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based on our generic beer which we set up for.

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That's just because we have a mess here.

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But you could theoretically set that to 32 and you have a 32 by 32 bit at or you just have to find a

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different way displaying it.

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But and so you know if you have any problems with this you know feel free to send me an e-mail.

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This is this is the toughest lab and I understand it's very difficult.

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We're implementing processes.

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We've got a state machine there and so it's not it's not an easy thing to go through and it'll take

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you some time.

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I know when I first went through it it was several hours of tinkering around and going through models

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and trying to figure out how to make it work.

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Throwing it on the board doesn't seem to be working right.

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But you know if you don't just don't give up.

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You know if you if you can't get it and you're really stuck send me an email and I'll be more than happy

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to help.