WEBVTT 00:01.490 --> 00:05.780 Welcome to live classics the final lab of course the multiplier. 00:05.930 --> 00:09.950 Now at this time you guys are probably pros and I only need to go through describing the shows even 00:10.070 --> 00:12.000 if you probably already have it working on your board. 00:12.140 --> 00:16.320 However I will still go through and show you my version of the multiplier. 00:16.330 --> 00:22.850 Now about you guys but this is a lot of fun for me so I hope that maybe someday we could another course. 00:22.850 --> 00:25.480 I hope you guys go out and start teaching courses of your own. 00:25.640 --> 00:30.200 I don't know that I could VHDL for days if you're really bored let's go. 00:30.200 --> 00:30.550 All right. 00:30.550 --> 00:31.510 Here it is. 00:31.570 --> 00:32.760 Laughs 6. 00:32.810 --> 00:40.170 The final lab multiplier running on bases to board and from the file I gave you. 00:40.310 --> 00:47.480 He will have input 1 and input 2 which are indicated by these by Ace which is divided. 00:47.480 --> 00:53.290 Here is the first four on the right and one second for our input two. 00:53.290 --> 00:59.540 However it doesn't matter because we're multiplying and as you know you must play by the time they get 00:59.540 --> 01:08.190 the same result and the product is all one the occasion is indicated by these eight ladies here. 01:08.390 --> 01:14.600 And then we got this button right here starter which indicates for us to go and do multiplication and 01:14.690 --> 01:17.190 reset here on the far right. 01:17.780 --> 01:22.230 So I'm I going to give you a quick penetration how this should look run on your board. 01:22.400 --> 01:26.800 So for example here right now I've got all zeroes which is zero. 01:26.840 --> 01:28.370 So I should get a 0. 01:28.370 --> 01:31.130 Now what I'm going to get in one. 01:31.370 --> 01:36.080 However my input 2 is still zero one time zero should still be zero. 01:37.010 --> 01:40.710 Which is as we see there now input 2. 01:40.820 --> 01:42.940 I'm going to go ahead and make that one. 01:43.640 --> 01:49.280 And we should see a single Elodie light up right there which is a binary indication of the number one 01:50.570 --> 01:51.420 and we do. 01:51.680 --> 01:54.020 And suffice it to say again it's the same thing. 01:54.110 --> 01:59.060 I can toggle that down which is now zero times when we get to zero. 01:59.060 --> 02:00.550 However if I start it up again. 02:00.590 --> 02:07.490 Give us one our reset is used to clear that so I can go ahead hit the reset button and instantly clear 02:07.490 --> 02:08.090 is that. 02:08.190 --> 02:15.950 Now does the difference between this reset and the resets and the other lapse is that this reset isn't 02:16.040 --> 02:20.280 indicated in the clock process. 02:20.480 --> 02:23.510 We aren't manually inflame the thought process. 02:23.510 --> 02:25.640 The clock is running at 50 megahertz. 02:25.700 --> 02:31.520 So as soon as I hit that it instantly picks it up and knows that OK this is very sad. 02:31.520 --> 02:37.690 So you go through you can do different variations and I'll do two. 02:37.730 --> 02:46.820 Two times one is me evaluate two or two three times one is you guys three sorry three times three which 02:46.910 --> 02:54.660 gives you a value of nine which you see there are binary 1 0 0 1 which is the binary value of 9. 02:54.980 --> 03:02.860 So you can go through it and you can do all of these here and I'll still solve your situation which 03:02.860 --> 03:04.850 is I don't even know what that is on me. 03:04.930 --> 03:05.810 But that's a big number. 03:05.810 --> 03:06.780 So you can go ahead. 03:06.920 --> 03:08.410 This calculator out and test it. 03:08.420 --> 03:13.640 And if the values are multiplying against each other or showing up there in binary you're getting correct 03:13.640 --> 03:16.550 results then your life is working correctly. 03:16.610 --> 03:25.810 And the reason we do this is because FPGA is by nature really are not designed for for most application 03:26.490 --> 03:35.270 that's easy on the bases to board only has four dedicated multipliers and there are 18 bits wide. 03:35.270 --> 03:42.160 So if you have an algorithm you want to run where you've got 20 bets you multiply by 20 bets. 03:42.350 --> 03:48.320 You can't really do that unless you know how to do this type of multiplication which seems a lot more 03:48.320 --> 03:54.170 complicated but because you just keep shifting and adding and shifting and adding But you know we can 03:54.320 --> 03:57.140 based on our generic beer which we set up for. 03:57.170 --> 03:59.180 That's just because we have a mess here. 03:59.360 --> 04:04.970 But you could theoretically set that to 32 and you have a 32 by 32 bit at or you just have to find a 04:04.970 --> 04:06.700 different way displaying it. 04:06.800 --> 04:13.270 But and so you know if you have any problems with this you know feel free to send me an e-mail. 04:13.270 --> 04:17.750 This is this is the toughest lab and I understand it's very difficult. 04:17.750 --> 04:19.700 We're implementing processes. 04:19.700 --> 04:25.280 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 04:25.280 --> 04:26.030 you some time. 04:26.030 --> 04:31.610 I know when I first went through it it was several hours of tinkering around and going through models 04:31.640 --> 04:33.590 and trying to figure out how to make it work. 04:33.600 --> 04:36.450 Throwing it on the board doesn't seem to be working right. 04:36.800 --> 04:39.590 But you know if you don't just don't give up. 04:39.590 --> 04:44.360 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 04:44.360 --> 04:44.860 to help.