1 00:00:00,660 --> 00:00:01,720 Hello, welcome back. 2 00:00:02,190 --> 00:00:09,870 In this lesson, we go in to develop the GPA, you extend or interrupt driver, I'm going to come to 3 00:00:09,870 --> 00:00:11,490 my source folder here, right. 4 00:00:11,490 --> 00:00:14,100 Click New Hour Select. 5 00:00:15,260 --> 00:00:17,620 Sourcefire, I'll call this t'ai. 6 00:00:19,160 --> 00:00:19,690 Lozzi. 7 00:00:20,960 --> 00:00:21,550 OK. 8 00:00:22,800 --> 00:00:23,760 We have this file. 9 00:00:24,000 --> 00:00:30,100 OK, I'm going to create the head of our include folder, right click new head of file. 10 00:00:31,540 --> 00:00:32,020 Quota's. 11 00:00:34,070 --> 00:00:34,600 Dorridge. 12 00:00:36,450 --> 00:00:37,020 OK. 13 00:00:39,660 --> 00:00:42,760 So we're going to have one function. 14 00:00:42,780 --> 00:00:47,640 Remember, on our nuclear board, the push button is connected to PC 13. 15 00:00:48,750 --> 00:00:53,040 Pottsy, been 13, has the the push pushbutton. 16 00:00:54,830 --> 00:00:58,780 So to start off, I'm going to include our whole lot each over here. 17 00:01:00,920 --> 00:01:04,490 And once that is done, I'm going to create a function here. 18 00:01:06,270 --> 00:01:08,910 Void this 13. 19 00:01:11,730 --> 00:01:17,910 Entrapped in it, and this time I'm not going to show how to ride this driver, I'm just going to explain 20 00:01:17,910 --> 00:01:22,140 line by line, because this course is not for developing bedmate or driver's. 21 00:01:23,220 --> 00:01:32,340 OK, so we're going to start off by enabling access to your ports seat to do that, we need to access 22 00:01:32,340 --> 00:01:38,250 the HP one enable register and then when we write four, it would correspond to bits. 23 00:01:38,260 --> 00:01:41,280 Number two, that corresponds to Port C. 24 00:01:43,340 --> 00:01:46,640 Four equals binary number. 25 00:01:48,270 --> 00:01:53,130 Zero one zero zero, so it's No zero bids, no one bids, no two bids, No. 26 00:01:53,130 --> 00:02:00,930 Zero is for Porti, this one is for Port B, this is for Port C, OK, so that is why I write for OK, 27 00:02:01,320 --> 00:02:03,960 every now and then I'm tempted to explain more. 28 00:02:05,450 --> 00:02:11,540 OK, also because we want to enable, extend or interrupt, and what extend or interrupt means is that 29 00:02:11,540 --> 00:02:16,060 we're not going to be checking the Penn State to see whether someone has pressed it or not. 30 00:02:16,640 --> 00:02:21,130 When someone presses the pin, we're going to be told automatically that's what this means. 31 00:02:21,500 --> 00:02:28,880 So because we're going to we want this functionality, we have to enable the system config, which is 32 00:02:28,880 --> 00:02:31,940 another module that handles our external interrupts. 33 00:02:32,330 --> 00:02:37,840 So our Anabasis config over here, that is part of the APB to bus. 34 00:02:37,850 --> 00:02:41,780 So I go to AP to enable and this hexadecimal code. 35 00:02:41,780 --> 00:02:48,230 When I expand it to its binary form, it would correspond to the bit that enables this config for us. 36 00:02:49,810 --> 00:02:56,680 So once that is done, we go into Configure PC 13, which is where our push button is connected. 37 00:02:57,080 --> 00:03:00,460 We're going to set PC 13 to its alternate function mode. 38 00:03:28,170 --> 00:03:29,850 We're going to configure it for its. 39 00:03:31,520 --> 00:03:33,170 It's input's mood. 40 00:03:34,660 --> 00:03:38,530 Inputs in Robert mode, essentially, so to do that. 41 00:03:39,590 --> 00:03:44,690 Let's go to our reference manual, because this bits I need to point it out to you. 42 00:03:46,990 --> 00:03:53,970 I'll come up here and I'll search you, and then I'm going to scroll down. 43 00:03:55,210 --> 00:03:56,940 OK, I jumped over here. 44 00:04:01,510 --> 00:04:02,900 GPA, you must register. 45 00:04:03,310 --> 00:04:06,430 So for input, we have to set this particular bit. 46 00:04:07,590 --> 00:04:14,160 We have to set a particular pin to zero zero, remember, in the Mod Register, two bits are used for 47 00:04:14,160 --> 00:04:15,070 a single pin. 48 00:04:15,360 --> 00:04:18,780 So we're dealing with PIN 13 pieces, 13. 49 00:04:18,810 --> 00:04:21,270 So we're looking for Modder 13. 50 00:04:22,430 --> 00:04:23,800 Over here, so we have to set. 51 00:04:24,470 --> 00:04:27,490 Twenty six and bid twenty seven to zero. 52 00:04:28,890 --> 00:04:33,840 OK, what we can do is use the end operator to disable just these bits. 53 00:04:34,920 --> 00:04:37,440 Right, so I can simply do that. 54 00:04:38,630 --> 00:04:39,620 By using this. 55 00:04:40,920 --> 00:04:48,900 If I expand this hexadecimal number, it corresponds to bits number twenty six and twenty seven, the 56 00:04:48,900 --> 00:04:51,200 bits we are interested in, right. 57 00:04:51,840 --> 00:04:59,310 And if I put a two day here and then I put an end here, it means sets between twenty six and twenty 58 00:04:59,310 --> 00:05:02,360 seven in mode register to zero zero for me. 59 00:05:02,410 --> 00:05:03,640 So that's what this means. 60 00:05:04,140 --> 00:05:10,290 OK, once that's done we're going to play the part selection for our external interruptive 13 because 61 00:05:10,290 --> 00:05:11,840 we're using PK 13. 62 00:05:12,690 --> 00:05:14,250 So this is what we do. 63 00:05:14,250 --> 00:05:17,370 We access this as config register and then we select this. 64 00:05:17,970 --> 00:05:21,810 Once we've cleared it, then we're going to select PK 13. 65 00:05:22,110 --> 00:05:24,700 Like I said this bit, I'm not going to elaborate. 66 00:05:25,310 --> 00:05:31,710 OK, and then once that is done, we unmask PK 13 like this. 67 00:05:33,450 --> 00:05:40,620 And then we're going to see that we want to detect falling trigger, we can detect in a rising age or 68 00:05:40,620 --> 00:05:43,440 a fall in edge, we want to say we want to detect fall in edge. 69 00:05:44,700 --> 00:05:48,200 So we said this are with this value. 70 00:05:48,630 --> 00:05:52,200 Once that is done, we can set the priority of this interrupt. 71 00:05:52,680 --> 00:06:00,150 I'm going to set it to priority six and I'm going to enable the interrupt over here again. 72 00:06:00,150 --> 00:06:02,730 If you want to learn more about this, there's a specialized course. 73 00:06:02,730 --> 00:06:09,750 I don't want you to come to me in the review or comment section telling me that I didn't explain this 74 00:06:09,750 --> 00:06:10,050 bit. 75 00:06:10,380 --> 00:06:10,800 Yes. 76 00:06:11,250 --> 00:06:14,460 Before this lesson, I said I wasn't going to explain this bit thoroughly. 77 00:06:14,880 --> 00:06:15,260 Right. 78 00:06:15,270 --> 00:06:16,800 Because there is a dedicated course. 79 00:06:16,800 --> 00:06:17,400 What a bit. 80 00:06:18,080 --> 00:06:25,470 OK, so traditionally or ordinarily, what I should have done is just uploaded of the file here called 81 00:06:25,820 --> 00:06:29,490 I don't see and told you download this file in order to a project. 82 00:06:29,490 --> 00:06:31,620 But I think that is more cryptic. 83 00:06:31,860 --> 00:06:38,000 Initially we went to the reference module to develop the the ATC one a bit. 84 00:06:38,310 --> 00:06:44,010 So now we need no go and look at each and every register and I need to explain each and every value 85 00:06:44,250 --> 00:06:47,150 because this is not a bare metal peripheral development course. 86 00:06:47,490 --> 00:06:49,940 So just bear with me, OK? 87 00:06:50,280 --> 00:06:52,260 After this runs, we can proceed. 88 00:06:52,650 --> 00:06:55,410 So we have to expose this to our. 89 00:06:56,340 --> 00:06:59,940 We have to expose this in a vault, so I'll copy this. 90 00:07:01,640 --> 00:07:02,950 And paste this over here. 91 00:07:06,910 --> 00:07:16,440 OK, controllers to save, controllers to save, and then let's build and see if there are any errors, 92 00:07:16,450 --> 00:07:20,530 I'm going to include adults age as well as adequate age. 93 00:07:20,550 --> 00:07:23,620 Yeah, you know, I may not see faults also include. 94 00:07:26,210 --> 00:07:27,140 XDA. 95 00:07:28,790 --> 00:07:29,370 The rich. 96 00:07:32,280 --> 00:07:35,550 Include ADC storage. 97 00:07:40,030 --> 00:07:41,770 OK, we have a bit of error. 98 00:07:42,050 --> 00:07:42,460 See? 99 00:07:43,780 --> 00:07:47,170 It's located in our ADC, Forelady Sidoti. 100 00:07:50,400 --> 00:07:51,270 What does it say? 101 00:07:51,300 --> 00:07:54,150 It says these are undeclared. 102 00:07:56,010 --> 00:07:58,800 It cannot locate the ADC data register. 103 00:07:59,960 --> 00:08:06,080 Of course, I forgot the arrow head as the arrow operator supposed to be, so let's click to build. 104 00:08:09,430 --> 00:08:14,740 OK, so it's built it's built successfully in the next lesson, we're going to test the drivers, we're 105 00:08:14,740 --> 00:08:18,960 going to test the ADC and the external enwrapped together. 106 00:08:19,270 --> 00:08:20,200 So I'll conclude you. 107 00:08:20,290 --> 00:08:21,010 I'll see you later. 108 00:08:21,010 --> 00:08:24,190 If you have any questions, leave them in the questions and answers area. 109 00:08:24,220 --> 00:08:24,670 See you.