WEBVTT 00:00.180 --> 00:06.950 This is the solution to the previous activity where you need to print an increasing content on the sale 00:07.410 --> 00:11.340 whenever you press the button using, of course, entrance. 00:11.700 --> 00:14.350 So let's first write the code for the Internet. 00:14.400 --> 00:16.110 OK, look for the Internet. 00:16.170 --> 00:17.590 We need the button beam. 00:17.610 --> 00:29.550 So the final button beam, which is number two in the set up, I'm going to do in mode button in with 00:30.360 --> 00:34.590 input and I'm going to create an interactive function. 00:35.220 --> 00:36.180 So void. 00:36.270 --> 00:38.700 OK, no other data type. 00:40.160 --> 00:43.390 Button pressed into it. 00:44.590 --> 00:52.860 And no parameter, right, so I have my interpretation that I'm going to feel just a little bit later, 00:52.860 --> 00:54.940 you know, what I'm going to do is attach. 00:59.270 --> 01:01.640 Digital 18 to. 01:03.150 --> 01:05.000 Interact with the button. 01:07.110 --> 01:14.670 OK, then go back to a new line, let's align the parameters, just which more reasonable, I'm going 01:14.670 --> 01:17.710 to put the name of the function button pressed. 01:19.060 --> 01:26.950 Interrupts And then I'm going to put the mode which is rising to rising when the signal goes from low 01:26.950 --> 01:27.590 to high. 01:28.330 --> 01:32.140 In other words, we will up when we pressed the perfectly. 01:32.740 --> 01:33.180 All right. 01:33.190 --> 01:39.450 And I'm going to do almost the exact same thing as I did in the previous lessons is I'm going to add 01:39.460 --> 01:40.270 fly here. 01:42.240 --> 01:53.140 Bill Burton is false and set the flag, as Britain pressed is true, and of course, I'm going to do 01:53.160 --> 01:54.720 also the debates just after. 01:55.030 --> 01:56.520 But this is the principle. 01:56.910 --> 02:01.870 I create a flight so I can initialize it to polls and then I set it to true inside. 02:01.950 --> 02:04.440 Interrupts, of course, all the time. 02:05.730 --> 02:10.230 And then in the loop function, I'm just going to try to structure if. 02:11.470 --> 02:12.970 Button pressed. 02:14.490 --> 02:22.590 But we are going to say Britain is not full, so we don't enter this if again and again and again we 02:22.590 --> 02:25.700 are going to enter this, if only the next time that it wasn't expressed. 02:25.980 --> 02:29.460 The after I have done that, I can do the action. 02:29.460 --> 02:32.870 I want to do it and I'm going to do after. 02:33.270 --> 02:33.600 I know. 02:33.630 --> 02:37.140 Let's come back to the button to interrupt. 02:37.140 --> 02:43.650 I'm going to denounce the button and signed long last time. 02:44.700 --> 02:51.180 But right, which is Moelis and unsigned long. 02:53.040 --> 02:53.680 Diebold's. 02:55.280 --> 03:05.520 DeLay, let's put 50 milliseconds, hey, and I'm going to get the times and saying long time no these 03:05.840 --> 03:09.420 minutes don't know, you should be pretty familiar with this. 03:09.440 --> 03:11.080 OK, this should be OK for you. 03:12.050 --> 03:16.040 Time now, minus last time we pressed the button. 03:17.500 --> 03:24.220 So this is a duration, if this duration is greater than the DBMS delay, then yes. 03:25.460 --> 03:35.240 We can do our action and we are also going to update the last time the button was pressed to time now, 03:36.290 --> 03:40.840 and if we update these viable, we need to set it as. 03:42.170 --> 03:43.060 Look, dial. 03:44.780 --> 03:47.990 All right, so now here we know that. 03:49.520 --> 03:54.320 We have pressed the button and so I can put this in the. 03:58.390 --> 04:05.840 OK, and the interrupt plus the demands now is good, so what we can do now is to do the action inside 04:05.840 --> 04:06.250 the look. 04:06.280 --> 04:07.610 So what do we need to do? 04:08.080 --> 04:11.640 We need to increase a counter and print that content. 04:12.220 --> 04:13.890 So that's actually pretty simple. 04:14.410 --> 04:15.880 Let's create a counter here. 04:16.340 --> 04:22.480 Let's create a global viral it conter that's initialize it to zero. 04:25.750 --> 04:34.720 And here, let's do counter placeless, so every time we press the button, it's going to go into interrupt. 04:35.940 --> 04:42.150 We said the flag here to true in the loop, we continuously check for this flag, if this flag is true, 04:42.630 --> 04:46.900 then we enter this or we set it to false and then we do the action. 04:46.930 --> 04:53.250 So every time we press the button, in the end, the content will be incremented by one and then say, 04:53.250 --> 04:55.980 oh, that brings so Zao here. 04:56.490 --> 04:57.750 That again. 04:57.750 --> 04:58.290 Of course. 05:00.360 --> 05:05.150 If we want to use the same, don't forget Salian and sell that. 05:06.570 --> 05:09.290 Bring it let's bring some nice text, OK? 05:11.110 --> 05:12.460 Conter is. 05:13.770 --> 05:18.560 These and then say all that, and then we've come to. 05:19.770 --> 05:21.240 All right, just like this. 05:24.210 --> 05:27.720 And now it seems to be good, so I can. 05:29.600 --> 05:30.480 Verified good. 05:32.190 --> 05:33.030 Activity. 05:37.120 --> 05:39.700 Don compelling me to upload the code. 05:41.240 --> 05:48.710 Don't imploding and let's open the sale monitor and I'm going to press the button so I press it is what 05:48.740 --> 05:50.050 I release the push button. 05:50.060 --> 05:51.080 Nothing happens. 05:51.470 --> 06:00.550 I press it again, control to I release nothing until three, four, five, six, etc.. 06:01.890 --> 06:08.910 So here you can clearly see that in the loop, our code is pretty simple, OK, and the action to monitor 06:08.910 --> 06:13.300 when we pressed the button is outside of the main program. 06:13.320 --> 06:19.280 OK, and is happening with the interrupt, and that's the end of the section with interrupts. 06:19.410 --> 06:25.650 We are actually going to come back to this later on in schools with a different example and we have 06:25.650 --> 06:27.270 a different hardware component.