1 00:00:00,750 --> 00:00:01,650 Hello and welcome. 2 00:00:03,270 --> 00:00:08,820 In this lesson, we are going to take on the P.W. ambitions of the ESB board. 3 00:00:09,900 --> 00:00:18,060 All 36 of the ESB 32 general purpose Input-Output Benz has a P.W. arm capability. 4 00:00:19,190 --> 00:00:20,720 This is a really great thing. 5 00:00:21,840 --> 00:00:27,570 But we must use more complex code to reach the same result on other pins. 6 00:00:29,300 --> 00:00:35,840 So let's put it on one of the general purpose, Input-Output with a P.W. output signal. 7 00:00:36,740 --> 00:00:46,390 Now if you went to this schematic all this pin out for various people, you can see that all of these 8 00:00:46,400 --> 00:00:50,420 pins can be used to generate P.W. arm signals. 9 00:00:51,350 --> 00:00:59,540 The first thing that you need to think about when programming a P.W. on the signal is its frequency. 10 00:01:00,110 --> 00:01:04,400 You need to retrieve that signal at a certain or specific frequency. 11 00:01:04,940 --> 00:01:07,970 We will use a value of 5000 hertz. 12 00:01:08,720 --> 00:01:10,820 That works fine with our lead. 13 00:01:11,480 --> 00:01:18,800 We must also specify that it P.W. and channel and the resolution of the BW and duty cycle. 14 00:01:19,820 --> 00:01:20,500 I want. 15 00:01:21,690 --> 00:01:28,470 Explain that BWR, because you must have some basic knowledge about BW on signals, but what it takes 16 00:01:28,470 --> 00:01:32,970 is also the ocean, a channel and a frequency. 17 00:01:33,750 --> 00:01:42,750 So after specifying that you to cycle using the solution and the frequency on the channel, we can start 18 00:01:42,750 --> 00:01:43,350 programming. 19 00:01:43,950 --> 00:01:50,040 We can choose a channel from zero to 15 and a resolution between one and 16 bits. 20 00:01:50,760 --> 00:01:54,960 We will use Channel zero and a resolution of eight bits. 21 00:01:55,380 --> 00:01:57,660 So let's get started. 22 00:01:57,720 --> 00:02:00,240 That's good, according to your thumbnail sketch. 23 00:02:01,500 --> 00:02:03,240 And here's a new sketch. 24 00:02:03,330 --> 00:02:05,310 Let's define some variables. 25 00:02:05,700 --> 00:02:10,199 First, we need to define that frequency and frequency. 26 00:02:11,009 --> 00:02:12,690 And let's make it 5000. 27 00:02:14,580 --> 00:02:16,110 Then we need the left channel. 28 00:02:18,660 --> 00:02:23,130 Let's make it zero and we need the resolution. 29 00:02:26,070 --> 00:02:29,610 And let's make it eight now. 30 00:02:30,330 --> 00:02:33,180 Let's use that general purpose, Input-Output win. 31 00:02:33,780 --> 00:02:38,800 Number two, where we have our lead on our external LED connected or at best. 32 00:02:39,100 --> 00:02:42,090 It's also has a built in lid that can be used. 33 00:02:42,720 --> 00:02:49,110 So these parameters must be defined inside the setup function. 34 00:02:49,440 --> 00:02:52,620 So let's go on why this gold? 35 00:02:53,610 --> 00:03:01,470 Now what we are going to write in inside the setup function won't be something we are used to, while 36 00:03:01,470 --> 00:03:05,790 going to likely see a dustbin and Lid C sit up. 37 00:03:06,480 --> 00:03:09,570 Now the Let's See attachment and let's use it up. 38 00:03:09,570 --> 00:03:14,100 There are basically functions for the BW arm configuration. 39 00:03:14,550 --> 00:03:18,090 They are very similar to analog write function and Arduino. 40 00:03:18,900 --> 00:03:21,870 So now the DSP. 41 00:03:22,940 --> 00:03:29,260 Doesn't support another great function, but it does support a much better one, which is the one that 42 00:03:29,270 --> 00:03:30,230 we already mentioned. 43 00:03:30,560 --> 00:03:32,720 Let's see right there. 44 00:03:32,720 --> 00:03:33,040 Let's see. 45 00:03:33,040 --> 00:03:35,810 A light function is very similar to another light. 46 00:03:35,840 --> 00:03:45,410 It also requires two parameters that BW channel that we want to write about Utah and the BW value. 47 00:03:45,440 --> 00:03:48,290 We want to write to the selected channel. 48 00:03:49,280 --> 00:03:57,050 Now, let's first finish the setup function now the let's see setup function. 49 00:04:00,520 --> 00:04:01,960 Will take three parameters. 50 00:04:02,150 --> 00:04:03,940 The first one will be the child. 51 00:04:07,160 --> 00:04:10,340 The second one will be the frequency. 52 00:04:10,940 --> 00:04:14,840 The third one will be the resolution, which we already defined up there. 53 00:04:19,790 --> 00:04:26,340 Next, we are going to assign a lead to that channel, so let see at that pin. 54 00:04:28,770 --> 00:04:38,900 Now the lid pin we already chose is two and we want to attach it to that channel that we have chosen. 55 00:04:40,790 --> 00:04:41,380 This is it. 56 00:04:41,390 --> 00:04:49,820 This is how you finish setting up that BW, um, frequency resolution and channel and how you can attach 57 00:04:49,820 --> 00:04:52,010 it to any output pin. 58 00:04:53,970 --> 00:05:02,570 Now to turn the lid, which is connected to PIN number two using the lid channel output from the VW 59 00:05:02,820 --> 00:05:03,360 signal. 60 00:05:04,170 --> 00:05:10,140 We need to set a specific brightness now to turn it on or off. 61 00:05:10,230 --> 00:05:14,430 We must define the duty cycle, for example, turn off the lid. 62 00:05:14,730 --> 00:05:16,320 That cycle must be zero. 63 00:05:16,530 --> 00:05:25,560 And the function lid see right that we already mentioned can be used inside the loop to set the brightness 64 00:05:25,560 --> 00:05:26,040 to zero. 65 00:05:26,500 --> 00:05:26,970 Now. 66 00:05:28,750 --> 00:05:30,950 We can use that function right now. 67 00:05:30,970 --> 00:05:31,390 That's right. 68 00:05:31,420 --> 00:05:31,930 Let's see. 69 00:05:32,140 --> 00:05:32,590 Right. 70 00:05:35,140 --> 00:05:37,270 It's exactly like analog, right? 71 00:05:37,280 --> 00:05:38,920 And it takes two parameters. 72 00:05:38,920 --> 00:05:43,000 The first one is the lead channel, which is this variable. 73 00:05:43,890 --> 00:05:47,770 And the second one is the duty cycle. 74 00:05:49,810 --> 00:05:56,740 Now you can add in duty cycle here and add zero. 75 00:05:56,920 --> 00:06:01,660 This will turn off valid because we have seen zero. 76 00:06:02,790 --> 00:06:11,490 To the left channel, which has been no tool, and it will set the protest to zero now different values 77 00:06:11,490 --> 00:06:12,510 of the cycle. 78 00:06:13,650 --> 00:06:16,190 Will turn on the lead with different priorities. 79 00:06:17,280 --> 00:06:25,680 Now this variable can be from zero up to 255 once that resolution used is eight bits. 80 00:06:26,220 --> 00:06:35,400 If we used a 10 bit resolution, it can go from zero up to 1024 or 1023 on. 81 00:06:35,730 --> 00:06:42,030 We already mentioned that you can choose as a union between one and up to 16. 82 00:06:42,810 --> 00:06:50,400 So the choice is yours, but you need to make sure that you are choosing a duty cycle that matches your 83 00:06:50,400 --> 00:06:51,030 resolution. 84 00:06:52,050 --> 00:06:58,910 So an eight bit resolution that cycle would be between zero and 125 to 155. 85 00:06:59,550 --> 00:07:09,930 OK, now that we are done with this, we can use the potential meter connected to the analogue pen from 86 00:07:09,930 --> 00:07:17,550 the previous lesson to control the brightness of that LEDs, or we can simply send values. 87 00:07:17,760 --> 00:07:19,740 Now to test this out? 88 00:07:20,370 --> 00:07:21,690 Let's complete the code. 89 00:07:22,680 --> 00:07:35,790 Let's first and the setup menu add cereal to begin and choose a moderate one hundred fifteen thousand 90 00:07:35,790 --> 00:07:36,600 two hundred. 91 00:07:37,990 --> 00:07:43,290 Then other delay as usual for one second 92 00:07:46,020 --> 00:07:46,950 after the delay. 93 00:07:47,130 --> 00:07:51,570 Let's write a sentence to make sure that everything is working correctly. 94 00:07:52,050 --> 00:08:01,470 Trend line and let's make this thing readable. 95 00:08:03,480 --> 00:08:07,710 OK, now we have the lead set up on the lid. 96 00:08:07,710 --> 00:08:15,180 See at the spin and we can use the lid see right up here. 97 00:08:16,860 --> 00:08:20,880 And the first value that will be written is zero so that it will be off. 98 00:08:21,900 --> 00:08:26,190 Now, inside the void loop, we can send other values. 99 00:08:27,540 --> 00:08:28,500 We can't send. 100 00:08:31,010 --> 00:08:33,500 Duty cycle, let's define duty cycle here. 101 00:08:35,900 --> 00:08:36,320 Plus. 102 00:08:38,610 --> 00:08:41,940 Equal +1, and let's add a delay. 103 00:08:47,760 --> 00:08:56,600 It's make it 15 milliseconds, okay, now, uh, let's move this line down here. 104 00:08:57,410 --> 00:08:58,700 It will start with zero. 105 00:08:58,940 --> 00:09:08,890 Then it will be +1 or let's make +10 and we'll keep moving until it reaches 235. 106 00:09:08,900 --> 00:09:12,830 We can add an if statement, but this this this called out. 107 00:09:15,940 --> 00:09:20,050 Let's first upload or verify it to make sure it doesn't have any errors. 108 00:09:21,250 --> 00:09:22,240 Let's save it. 109 00:09:25,360 --> 00:09:27,130 BW on this thing. 110 00:09:38,680 --> 00:09:41,140 OK, then combining now, let's upload the code. 111 00:09:47,970 --> 00:09:54,240 We should we should add a line to make sure that we will pretend that it's cycle. 112 00:10:02,230 --> 00:10:05,020 We want to combine the cold, but for now. 113 00:10:11,820 --> 00:10:17,160 Let's put it, compile it so that we can get that cycle here now. 114 00:10:18,700 --> 00:10:22,390 Let's recompile the code for the fight again. 115 00:10:30,830 --> 00:10:32,000 Now it's loaded. 116 00:11:13,250 --> 00:11:14,300 OK, now. 117 00:11:15,400 --> 00:11:23,740 As you can see, it went above 255 very fast, so we need to control this once the duty cycle reaches 118 00:11:26,240 --> 00:11:30,100 its cycle is of equal to 125. 119 00:11:30,730 --> 00:11:33,940 We need to reset to zero. 120 00:11:36,560 --> 00:11:38,270 Now, let's combine it again. 121 00:11:40,840 --> 00:11:41,920 Now, let's upload it. 122 00:12:00,300 --> 00:12:00,690 OK. 123 00:12:00,870 --> 00:12:01,290 Done. 124 00:12:01,560 --> 00:12:08,460 Now, as you can see, once it reaches 255, it resets to zero. 125 00:12:08,790 --> 00:12:16,230 And from your ISP bald, you can see that the built in led all accelerated that you are connecting is 126 00:12:16,230 --> 00:12:17,940 fading in and out. 127 00:12:18,480 --> 00:12:20,790 Using this very simple code. 128 00:12:21,930 --> 00:12:26,970 Now, now let's summarize what we did this last one. 129 00:12:27,120 --> 00:12:29,850 We have said the frequency to 5000. 130 00:12:30,330 --> 00:12:36,900 We have used the channel to be zero and we have chosen the resolution to be eight, which means that 131 00:12:36,900 --> 00:12:39,960 we have to cycle between zero and 255. 132 00:12:40,770 --> 00:12:45,990 We started with a duty cycle of zero and he reached out of the theater communication. 133 00:12:46,440 --> 00:12:48,190 Here we used new functions. 134 00:12:48,210 --> 00:12:54,510 Let's use it up to set up that BW frequency channel and resolution. 135 00:12:55,050 --> 00:13:03,220 And this lets you attach pin to attach the beat function to us and to a specific pin, which has been 136 00:13:03,220 --> 00:13:03,960 number two here. 137 00:13:05,730 --> 00:13:08,550 And the LCD right is basically like analog, right? 138 00:13:08,580 --> 00:13:15,510 It takes a channel and the duty cycle and try its value to that channel. 139 00:13:16,780 --> 00:13:24,750 Now in this photo, we have used the LED channel, which was proudly attached here to pin number tool 140 00:13:25,420 --> 00:13:26,500 and that you Typekit. 141 00:13:26,680 --> 00:13:29,320 And we kept increasing the cycle by 10. 142 00:13:30,780 --> 00:13:32,580 And printed on this here on a monitor. 143 00:13:33,060 --> 00:13:39,720 Now, once that dude cycle reaches 255, which is the limit here, we did that. 144 00:13:39,720 --> 00:13:42,870 I said the cycle to zero to repeat the process again. 145 00:13:43,950 --> 00:13:49,920 And that is how you can fit it using P.W. arm signal. 146 00:13:50,010 --> 00:13:51,990 You can apply this to any other thing. 147 00:13:52,560 --> 00:13:59,790 You can choose 10 bit resolution in that case, if you did choose 10 bit resolution. 148 00:14:01,380 --> 00:14:06,910 You will get values between zero and one thousand twenty three. 149 00:14:07,320 --> 00:14:14,310 So in that case, this if statement will be one thousand twenty three instead of a set of 255. 150 00:14:15,090 --> 00:14:15,790 That's it. 151 00:14:15,810 --> 00:14:21,550 I know that this was a long plus one, but I wanted to explain, uh, bw. 152 00:14:21,570 --> 00:14:23,130 I'm using an example. 153 00:14:23,430 --> 00:14:27,690 I hope that everything is now well explained to you. 154 00:14:27,720 --> 00:14:30,700 If you have any question regarding anything, you can ask. 155 00:14:30,720 --> 00:14:31,530 This is Ashraf. 156 00:14:32,220 --> 00:14:32,790 See you next. 157 00:14:33,210 --> 00:14:33,960 Happen happening. 158 00:14:35,880 --> 00:14:37,770 This is educational engineering team.