1 00:00:00,640 --> 00:00:01,810 Hello, welcome back. 2 00:00:02,200 --> 00:00:08,170 And this we are going to test out the drivers that we've assembled, but before we do that, I'm going 3 00:00:08,170 --> 00:00:17,340 to add a simple driver to our XDA that Cifas actually this driver has got nothing to do with XDA, but 4 00:00:17,380 --> 00:00:20,100 it's it's the same peripheral. 5 00:00:20,530 --> 00:00:23,170 It's a driver for PC 13 inputs. 6 00:00:23,170 --> 00:00:30,400 But in this configuration here will let us configure PC 13 as an input but in interruptive mode. 7 00:00:30,610 --> 00:00:34,330 And we'll interrupt mode in places that we need not check. 8 00:00:34,330 --> 00:00:37,990 The state of the pin, whether it's been pressed or not, will be towed. 9 00:00:38,740 --> 00:00:44,920 But I'm going to create a simpler driver, which would require us to pull the the state of the pin. 10 00:00:45,250 --> 00:00:48,190 So to do that, this one, I'm simply going to say void. 11 00:00:50,140 --> 00:00:51,130 This is an easy one. 12 00:00:51,130 --> 00:00:59,860 We say GPU in it and all we have to do is we have to enable clock access to GPU Pottsy, because we're 13 00:00:59,860 --> 00:01:08,500 dealing with PC 13 and because in the mode register to set up into inputs, you need to set the two 14 00:01:08,500 --> 00:01:09,550 bits of that be. 15 00:01:12,340 --> 00:01:19,540 You need to set it to bits of that pin to to 090, and because the default value is zero and zero in 16 00:01:19,540 --> 00:01:25,410 the mode register, I need not go and explicitly set it to zero zero over here. 17 00:01:25,450 --> 00:01:28,260 What we did is explicitly set it to zero and zero. 18 00:01:28,690 --> 00:01:31,900 We can do the same thing here or we can skip, but. 19 00:01:34,600 --> 00:01:36,680 I'll just keep and show you that it would still work. 20 00:01:36,700 --> 00:01:38,060 I think they'll be a good lesson. 21 00:01:38,440 --> 00:01:44,860 OK, so this over here, we just need to enable clock access and by default, the penis and input mode. 22 00:01:44,860 --> 00:01:46,140 So we're not touching anything. 23 00:01:46,540 --> 00:01:48,550 Now we're going to read the Penn State. 24 00:01:48,880 --> 00:01:54,640 So we have this function that we created is going to return you into eight underscore T and the name 25 00:01:54,640 --> 00:01:58,200 of the function is going to be read digital senseor. 26 00:01:59,380 --> 00:02:06,730 So we say read digital on the school senseor like this and it takes no arguments open and close like 27 00:02:06,730 --> 00:02:07,000 this. 28 00:02:07,480 --> 00:02:10,780 OK, so what we have to do is go to the. 29 00:02:12,330 --> 00:02:21,240 Port inputs, data register and locates the bits that corresponds to the the particular pin we are looking 30 00:02:21,240 --> 00:02:21,510 for. 31 00:02:22,080 --> 00:02:24,030 So let's go and see this. 32 00:02:25,030 --> 00:02:26,320 It's worth showing. 33 00:02:29,540 --> 00:02:33,500 I'm over here in our reference manual GPU. 34 00:02:34,760 --> 00:02:41,000 Registe this I'm going to scroll down to IDR, which stands for Input's Data Register. 35 00:02:42,300 --> 00:02:43,950 She'll be down here somewhere. 36 00:02:47,380 --> 00:02:55,720 We have input data register here and over here when we configure the opinions as input, the state is 37 00:02:55,720 --> 00:03:00,180 kept here such that I'd ask you is four point zero. 38 00:03:00,700 --> 00:03:07,630 So if our button was connected to a PIN zero, we can check IDR zero for where the button is pressed 39 00:03:07,630 --> 00:03:08,070 or not. 40 00:03:08,260 --> 00:03:10,930 In our case, we're dealing with 13. 41 00:03:10,940 --> 00:03:12,940 So IDR 13 here. 42 00:03:13,880 --> 00:03:21,170 And it tells us these bits are read-only and can be accessed in a word mode only, meaning we can access 43 00:03:21,230 --> 00:03:24,020 these bits in a 32 bit mode only. 44 00:03:24,990 --> 00:03:32,490 They contain the input value of corresponding iReports, so we want to check the status of this 13. 45 00:03:32,760 --> 00:03:39,840 So what we can do is we can run, we can write on an operator and compare it to the bits 13. 46 00:03:41,100 --> 00:03:42,750 OK, so. 47 00:03:46,650 --> 00:03:54,780 In this register industry, chuba to register, if we set everything to zero and we set only bits 13 48 00:03:54,780 --> 00:04:02,160 to one, if we convert zero zero zero zero zero zero one zero zero zero zero zero into hexadecimal, 49 00:04:02,160 --> 00:04:07,730 no, what we will get is zero six two zero zero zero three zeros after the two. 50 00:04:08,640 --> 00:04:10,230 All you can, you know. 51 00:04:11,910 --> 00:04:13,470 Three zeros after the two. 52 00:04:14,730 --> 00:04:15,850 Let's use hexadecimal. 53 00:04:15,870 --> 00:04:17,010 It will be shorter. 54 00:04:17,490 --> 00:04:18,740 Let me show you what I mean. 55 00:04:18,960 --> 00:04:21,870 Just pardon me this time I'm all over the place. 56 00:04:22,110 --> 00:04:27,870 So what we're going to do is this time elaborate because it's a short function over here. 57 00:04:27,880 --> 00:04:34,560 We're going to see if you see and input data register. 58 00:04:35,160 --> 00:04:38,180 So this is the entire register that we've just seen. 59 00:04:38,400 --> 00:04:42,630 We're going to take that and perform an end operation with zero X. 60 00:04:44,960 --> 00:04:51,770 Two zero zero zero and what does this mean, OK, if I take this hexadecimal value? 61 00:04:52,700 --> 00:04:54,950 And I it to binary. 62 00:04:57,050 --> 00:04:58,110 I'll show you what we get. 63 00:04:58,130 --> 00:05:03,470 But before I show you this value here that we see, we see it's got one, two, three, four digits 64 00:05:03,680 --> 00:05:10,220 is the same as one, two, three, four in a zero in front of a number can be deleted and is the same. 65 00:05:10,220 --> 00:05:15,620 So we can keep one zero here, keep to keep three or keep four or just have it like this is the same. 66 00:05:16,070 --> 00:05:20,030 If we expand this to binary, what we get is this. 67 00:05:21,650 --> 00:05:29,180 So this two here in binary becomes zero one, it becomes zero zero one zero like this, and the other 68 00:05:29,180 --> 00:05:31,220 zero become four zeros. 69 00:05:31,220 --> 00:05:32,240 One, two, three, four. 70 00:05:32,240 --> 00:05:35,030 And then one, two, three, four, one, two, three, four. 71 00:05:35,300 --> 00:05:39,260 So if we count this, we have we count from zero. 72 00:05:39,290 --> 00:05:42,220 So over here, we end it. 73 00:05:42,380 --> 00:05:50,230 We have zero, one, two, three, then four, five, six, seven, eight, nine, 10, 11, 12. 74 00:05:50,450 --> 00:05:51,740 This is 13. 75 00:05:53,020 --> 00:05:56,110 So we are comparing a bit to 13. 76 00:05:57,280 --> 00:06:04,090 This constant bit 13 and a bit 13 in our ADR register, we are performing an end operation. 77 00:06:04,360 --> 00:06:09,830 If our bits 13 and Idriz Sets is going to return, true, otherwise is going to return false. 78 00:06:10,150 --> 00:06:11,180 So that's what we're dealing with. 79 00:06:11,590 --> 00:06:12,100 OK. 80 00:06:16,190 --> 00:06:21,680 Let's see, so we are seen, we take this and then we perform our end operation and then we see. 81 00:06:24,430 --> 00:06:26,020 Return one for true. 82 00:06:28,660 --> 00:06:30,180 Else return false. 83 00:06:32,560 --> 00:06:33,850 10 zero like this. 84 00:06:34,120 --> 00:06:34,750 OK. 85 00:06:38,620 --> 00:06:39,070 Right. 86 00:06:39,100 --> 00:06:41,610 So we're going to expose these functions as well. 87 00:06:45,780 --> 00:06:46,380 DoubleClick. 88 00:06:47,650 --> 00:06:51,850 And I'm going to come to the includes order, open openness and. 89 00:06:53,280 --> 00:06:59,340 Drop this over here, put a semicolon and go back there, double click. 90 00:07:00,210 --> 00:07:06,930 Contrary to copy, includes foda to get the dots each fall and drop this over here. 91 00:07:07,660 --> 00:07:14,120 OK, we're looking good control to save over here and come back here, control to save us. 92 00:07:14,130 --> 00:07:18,480 Well, now I'm going to go to the main road, see fall and test them out one by one. 93 00:07:22,930 --> 00:07:25,360 So I'll come over here and I'll have. 94 00:07:26,830 --> 00:07:30,640 You indeed underscore t I call this B10 state. 95 00:07:32,900 --> 00:07:34,820 And then I have. 96 00:07:36,120 --> 00:07:40,640 You into 30 to 40, I'll call this sense of value. 97 00:07:50,150 --> 00:07:55,670 So over here in our wall, one, what we want to do is. 98 00:07:57,230 --> 00:08:01,310 We want to enable our you so Cappiello, you enable. 99 00:08:02,270 --> 00:08:08,420 Before our wild one, sorry about that of anybody, you how about ADC? 100 00:08:09,050 --> 00:08:13,250 We want to enable our ADC, so we call ADC and it's as well. 101 00:08:17,260 --> 00:08:19,480 If anybody ADC so now. 102 00:08:20,440 --> 00:08:22,930 In here, we're going to get our button states. 103 00:08:24,040 --> 00:08:26,020 We see button states equals. 104 00:08:27,060 --> 00:08:30,480 We're going to use read digital senseor. 105 00:08:31,670 --> 00:08:33,540 Function, the function we just wrote. 106 00:08:34,130 --> 00:08:38,630 So the return value of this function is going to be stored in our B10 state. 107 00:08:39,510 --> 00:08:40,110 Variable. 108 00:08:42,560 --> 00:08:45,590 OK, and then sense of value equals. 109 00:08:47,760 --> 00:08:51,480 We're going to call our read sense of value. 110 00:08:53,120 --> 00:08:55,580 Read analog senator over here. 111 00:08:56,100 --> 00:08:56,590 OK. 112 00:09:01,890 --> 00:09:03,450 This one here like this. 113 00:09:04,220 --> 00:09:04,590 OK. 114 00:09:08,260 --> 00:09:10,390 So we can print we can print something. 115 00:09:10,510 --> 00:09:14,910 Let's see, OK, we can read it on prints, we can just view this in the watch window. 116 00:09:15,940 --> 00:09:18,790 Um, so I come over here, click over here to build. 117 00:09:22,150 --> 00:09:23,690 We have three arrows. 118 00:09:24,480 --> 00:09:26,830 Let's see where the anomaly is, OK? 119 00:09:27,280 --> 00:09:28,830 Goodness, I'm losing my mind. 120 00:09:28,840 --> 00:09:31,040 I put these here. 121 00:09:31,210 --> 00:09:34,150 This is supposed to be a variable acyclic to be able to gain. 122 00:09:36,550 --> 00:09:39,820 It's built successfully, it's ups looking good. 123 00:09:42,480 --> 00:09:46,410 OK, so once this is done, I'm going to right click over here. 124 00:09:48,280 --> 00:09:53,740 And go to debuggers, estimate that to double click. 125 00:09:54,700 --> 00:09:56,380 The name some drivers. 126 00:09:57,560 --> 00:09:59,300 And then I say, OK, over here. 127 00:10:06,380 --> 00:10:07,610 And then I'll click the switch. 128 00:10:12,100 --> 00:10:13,930 Eau Claire, what we currently have here. 129 00:10:14,810 --> 00:10:24,500 Remove all of this controversy and then and then a sense of value as well currently of not connected 130 00:10:24,500 --> 00:10:28,070 in a sense, or to my P one. 131 00:10:28,100 --> 00:10:29,930 So we don't expect anything. 132 00:10:30,290 --> 00:10:34,620 We expect the value to be random to float and then I'll connect something and then we test it. 133 00:10:34,850 --> 00:10:36,410 So let's click here to run. 134 00:10:37,230 --> 00:10:44,390 OK, so the reason our B10 status is one is because our push button on the nuclear board is active high 135 00:10:44,750 --> 00:10:46,610 meaning by default, its values. 136 00:10:46,610 --> 00:10:48,930 One when you press its sorry. 137 00:10:50,390 --> 00:10:58,550 Scratch that, the push button on our nuclear on our nuclear board is active, low, active, low means 138 00:10:59,060 --> 00:11:02,280 it becomes when you activate it, it becomes law. 139 00:11:02,780 --> 00:11:05,870 So by default, its value is high, which is one. 140 00:11:05,960 --> 00:11:07,490 So I'm going to press the button, Lissi. 141 00:11:08,090 --> 00:11:12,320 You see, as I press is one I release as I press, it goes to zero. 142 00:11:12,320 --> 00:11:15,080 I release just one of press again. 143 00:11:15,080 --> 00:11:15,830 It becomes zero. 144 00:11:15,830 --> 00:11:18,320 I release it becomes one press again. 145 00:11:18,320 --> 00:11:19,520 It becomes zero release. 146 00:11:19,520 --> 00:11:20,210 It becomes one. 147 00:11:20,600 --> 00:11:20,990 So. 148 00:11:22,390 --> 00:11:25,530 Our or Aitkin is. 149 00:11:26,550 --> 00:11:33,360 Pier one, I'm going to connect a jumper wire from Pier one to ground to see if I can get it. 150 00:11:34,570 --> 00:11:37,090 Uh, my microcontroller disconnected. 151 00:11:40,360 --> 00:11:46,600 OK, so my microcontroller disconnected because I was trying to add a jumper wire in the OK, let's 152 00:11:46,600 --> 00:11:47,740 go back to Dybbuk. 153 00:11:47,830 --> 00:11:49,030 You click over here. 154 00:11:53,410 --> 00:11:55,600 It's opening a click to switch. 155 00:11:58,250 --> 00:11:58,780 OK. 156 00:12:02,270 --> 00:12:03,440 A click to run to code. 157 00:12:04,270 --> 00:12:12,230 OK, so currently I have an ADC connected to my PC, one of Connecter, the middle of the ADC to be 158 00:12:12,250 --> 00:12:19,630 one, the rightmost leg to the three point three votes and the leftmost leg. 159 00:12:21,310 --> 00:12:22,270 To my. 160 00:12:24,210 --> 00:12:30,380 OK, so currently I have a potential meter, just bear with me, this lesson is not going as planned. 161 00:12:30,750 --> 00:12:35,160 I have a potential meter connector to my P.A. one not on easy. 162 00:12:35,550 --> 00:12:36,950 I wonder why I said that. 163 00:12:37,350 --> 00:12:40,110 So there is a potential meter connector to peer one. 164 00:12:40,230 --> 00:12:46,260 And as you know, a potential meter has three legs, the middle leg, the left leg and the right leg. 165 00:12:46,530 --> 00:12:49,290 The middle leg is connected to a one. 166 00:12:49,590 --> 00:12:52,260 The left leg is connected to G and D. 167 00:12:52,560 --> 00:12:55,450 The right leg is connected to the three point three votes. 168 00:12:55,950 --> 00:12:59,940 And as I move the potential meter, you would see that the value would change. 169 00:13:00,180 --> 00:13:03,990 Currently the value is zero because I've moved it to the opposite end. 170 00:13:04,380 --> 00:13:05,400 That will give me zero. 171 00:13:05,400 --> 00:13:07,590 I'm going to move it to the other opposite end. 172 00:13:07,980 --> 00:13:08,580 Let's see. 173 00:13:13,320 --> 00:13:19,380 Just a moment, OK, so I've moved it to the opposite end and I can see the sense of value has changed. 174 00:13:19,800 --> 00:13:21,560 OK, you can try this with a jumper. 175 00:13:21,720 --> 00:13:27,600 Yes, well, you can just put a jumper wire into Pier one and then connect at the other end of the jumper 176 00:13:27,600 --> 00:13:29,490 wire to ground zero. 177 00:13:30,000 --> 00:13:33,710 And then you can pull it out of ground and connect it to three point three votes. 178 00:13:33,720 --> 00:13:35,550 It should read four thousand. 179 00:13:36,420 --> 00:13:41,730 And something which is the maximum ATC volume, four thousand and ninety five is the maximum, but it 180 00:13:41,730 --> 00:13:45,510 should be read in something around that it doesn't have to be precisely that. 181 00:13:45,930 --> 00:13:51,360 But this would be an indication that your analog sensor configuration is working. 182 00:13:51,840 --> 00:13:52,590 So this is it. 183 00:13:53,370 --> 00:13:58,560 So as you can see over here, yes, it's reading almost the maximum ATC value because my potential meter 184 00:13:58,560 --> 00:13:59,790 is pushed to the other end. 185 00:13:59,790 --> 00:14:07,950 If I'm to rotate it to the opposite end, is going to give us a value like zero one or two, which indicates 186 00:14:07,950 --> 00:14:10,380 that it's an extremely, extremely low value. 187 00:14:10,840 --> 00:14:13,050 OK, so I'm sure you've got this. 188 00:14:13,110 --> 00:14:15,330 I know this lesson had a bit of hiccups. 189 00:14:15,690 --> 00:14:20,610 If there is something you didn't understand, kindly leave it in the questions in this area and I'll 190 00:14:20,610 --> 00:14:22,190 be glad to follow up on it. 191 00:14:22,530 --> 00:14:23,080 So this it. 192 00:14:23,200 --> 00:14:24,960 I'll see you in the next lesson of a nice day.