1 00:00:00,900 --> 00:00:01,250 Hello. 2 00:00:01,260 --> 00:00:01,950 Welcome back. 3 00:00:01,950 --> 00:00:07,160 In this lesson we're going to see how to use the ADC with time trigger. 4 00:00:07,170 --> 00:00:13,140 We're going to write a program that converts the ownership temperature sense or output use in some poor 5 00:00:13,140 --> 00:00:17,320 sequence of three and timer trigger at 1 Hertz. 6 00:00:17,340 --> 00:00:18,880 Let's see how to do that. 7 00:00:18,900 --> 00:00:19,790 Come over here. 8 00:00:19,800 --> 00:00:25,850 Project create a new format for this call ADC. 9 00:00:26,060 --> 00:00:41,570 Call the time a trigger and then the project ADC timeout trigger and deploy this team 4C 1 2 3 through 10 00:00:41,620 --> 00:00:42,790 page 6 p.m.. 11 00:00:43,640 --> 00:00:46,030 This over here okay. 12 00:00:46,440 --> 00:00:46,970 Then 13 00:00:50,550 --> 00:00:55,920 devices call lets you is also a startup over here. 14 00:00:56,240 --> 00:00:58,450 Device startup CRM call. 15 00:00:58,460 --> 00:00:58,930 Okay. 16 00:00:59,590 --> 00:01:00,070 Okay. 17 00:01:00,070 --> 00:01:01,480 Over here. 18 00:01:01,540 --> 00:01:03,080 I renamed this to the name of the port. 19 00:01:03,110 --> 00:01:04,150 Tim 4C. 20 00:01:04,220 --> 00:01:08,310 One two three no Trump down over here. 21 00:01:09,700 --> 00:01:16,230 BPP and then target options changed us to 16. 22 00:01:16,250 --> 00:01:18,780 Then come to the back of my head dropdown. 23 00:01:18,780 --> 00:01:22,920 Still there is ICD I click over here resets and around. 24 00:01:22,920 --> 00:01:24,380 Okay okay. 25 00:01:24,460 --> 00:01:33,720 And then come over here right click a new item it's c file may that see like this so we're gonna start 26 00:01:33,720 --> 00:01:36,970 off by including our port header. 27 00:01:37,050 --> 00:01:38,880 This over here. 28 00:01:38,880 --> 00:01:41,350 Once they start we can open our main function. 29 00:01:52,390 --> 00:01:56,940 We start off by enabling clock to our our ADC as well as our timer. 30 00:01:56,980 --> 00:02:06,190 We're going to use wide timer 0 for this won't use a top a timer or a white timer so I'll a system control 31 00:02:06,370 --> 00:02:09,080 our CTC over here. 32 00:02:09,140 --> 00:02:18,330 AC DC ADC we use an ADC module 0 so we can pass your X through one over here to enable clock access. 33 00:02:18,610 --> 00:02:22,630 Once that's done we're going to use Y to time a block 0 so I'm going to say system control 34 00:02:25,390 --> 00:02:40,220 our CTC the timer over here then I'm going to pass one course when I pass this sure of X one over here. 35 00:02:40,300 --> 00:02:41,150 Once that is done 36 00:02:44,900 --> 00:02:49,920 we initialize the ADC first and then we move onto the timer. 37 00:02:49,920 --> 00:02:53,380 I'm going to start off by disabling these sample sequence at 3. 38 00:02:53,380 --> 00:02:57,280 First I'll say ADC 0 39 00:03:00,310 --> 00:03:05,770 DCT SS part 8 over here. 40 00:03:05,770 --> 00:03:08,240 Once that's done I'm going to do it. 41 00:03:08,270 --> 00:03:11,200 This year marks 42 00:03:14,680 --> 00:03:22,260 then going to pass your x F and then 3 0 0 1 2 3. 43 00:03:22,260 --> 00:03:29,590 This next line of the earmarks access is what is going to enable the the time a trigger. 44 00:03:29,730 --> 00:03:33,720 So I'll say it is a zero and then we access earmarks again. 45 00:03:33,720 --> 00:03:37,610 We could have just admitted this but it's often done. 46 00:03:38,160 --> 00:03:41,380 Earmarks and then I'm going to press your ex over here. 47 00:03:41,640 --> 00:03:42,240 5. 48 00:03:42,250 --> 00:03:46,370 Here's your 3 series after the 5 and this selected time a trigger. 49 00:03:46,500 --> 00:03:50,970 So it the new stuff in this lesson time trigger 50 00:03:59,960 --> 00:04:07,220 and once they start I'm going to get input from 10 0 0 7 ATC 0 51 00:04:11,820 --> 00:04:19,240 SS Mark's theory and then I'll pass you here and then once they start I'm going to take the chip temperature 52 00:04:19,680 --> 00:04:21,120 sets flag. 53 00:04:21,160 --> 00:04:25,540 That's the first sample so we'll see indices 0. 54 00:04:26,140 --> 00:04:28,880 Since we've got just one sample we've got to set off like that. 55 00:04:29,440 --> 00:04:36,910 So I'll say it C0 and then I'll see it SS control number three over here and then I'm going to pass 56 00:04:37,300 --> 00:04:40,050 two x three 57 00:05:03,310 --> 00:05:13,110 once that's done I'm going to enable these samples sequence of three between indices here is t ss then 58 00:05:13,140 --> 00:05:15,480 I'll post number eight here right. 59 00:05:15,510 --> 00:05:18,190 Once we've done this we can initialize the Y timer 60 00:05:24,760 --> 00:05:33,810 gonna start off by disabling the timer before initialization can I say w timer zero control register 61 00:05:34,730 --> 00:05:45,400 pass you here once that's done I'm going to select the 32 bit option by doing w timer 0 and then configuration 62 00:05:45,400 --> 00:05:51,460 register cause to x 2 for 63 00:05:57,260 --> 00:06:07,340 once they start going to set it to periodic mode and down counter mode so I'm gonna set a timer t in 64 00:06:07,400 --> 00:06:12,560 my register gonna pass here x purity here 65 00:06:23,980 --> 00:06:31,390 I'm going to set the value of the interval load register since we want 1 Hertz mean and once per second 66 00:06:31,870 --> 00:06:34,540 I'm going to load sixteen million here. 67 00:06:34,790 --> 00:06:36,610 So come over here and set up your time. 68 00:06:38,530 --> 00:06:39,580 0. 69 00:06:39,730 --> 00:06:45,610 I'll go to the timer interval load register and then I'm going to pass sixteen. 70 00:06:45,610 --> 00:06:46,540 One two three. 71 00:06:46,540 --> 00:06:47,830 One two three. 72 00:06:48,130 --> 00:06:49,190 Like this. 73 00:06:49,390 --> 00:06:56,500 Once they start I'm going to select the timer trigger ADC over here in the control register by S.W. 74 00:06:56,500 --> 00:07:07,670 time I 0 CTO and I'll come over here and pass 0 x to 0 and then I'm going to enable a timer a going 75 00:07:07,680 --> 00:07:12,820 to enable a timer by saying w timer zero control register 76 00:07:15,490 --> 00:07:20,500 your X 01 here like this. 77 00:07:20,500 --> 00:07:26,800 Once that is done we can start conversion and wait for conversion to complete a wild one over here 78 00:07:33,730 --> 00:07:36,960 open close and I'll see Quark 79 00:07:40,770 --> 00:07:45,260 this is 0 rice and 8 80 00:07:48,540 --> 00:07:51,640 because zero. 81 00:07:52,310 --> 00:07:56,290 We have to wait for conversion to complete to truly open inclusive I hear. 82 00:07:56,560 --> 00:08:03,380 And then when I create a global variable here quite a temporary chart to store devalue 83 00:08:06,630 --> 00:08:08,360 I 84 00:08:11,200 --> 00:08:11,830 come here. 85 00:08:11,870 --> 00:08:12,490 Temperature 86 00:08:15,660 --> 00:08:26,910 because one forty seven minus two forty seven multiply by the KDE value which is eighty says your SS 87 00:08:26,910 --> 00:08:38,150 five four three over here divided by twelve feet which is four thousand and ninety six right. 88 00:08:38,170 --> 00:08:47,350 And once we've done this we've got to clear the completion flight by doing 80 C0 ISC over here and then 89 00:08:47,440 --> 00:08:48,520 we pass it here 90 00:09:01,920 --> 00:09:02,220 right. 91 00:09:02,310 --> 00:09:03,570 Let's build and see what we have 92 00:09:06,500 --> 00:09:07,490 built successfully. 93 00:09:07,490 --> 00:09:08,180 We know Aero. 94 00:09:08,300 --> 00:09:14,200 Let's get on our board and see our looks so let's download the code onto our board. 95 00:09:14,250 --> 00:09:17,860 Click over here and it's downloaded successfully. 96 00:09:17,950 --> 00:09:19,440 Point click here to go to the debug. 97 00:09:19,470 --> 00:09:29,030 You okay. 98 00:09:30,020 --> 00:09:36,400 And I'm going to add our global variable to the watch window double click on temperature here right 99 00:09:36,430 --> 00:09:46,000 click and then out towards window one over here once they start I'm going to disable hexadecimal display 100 00:09:46,030 --> 00:09:47,980 by clicking here like this. 101 00:09:48,130 --> 00:09:53,580 Then I'll click here to run the code and indeed. 102 00:09:53,770 --> 00:09:55,510 So this the temperature reading. 103 00:09:55,600 --> 00:09:57,610 It's been converted into temperature. 104 00:09:57,670 --> 00:09:59,480 It looks a bit unstable here. 105 00:09:59,560 --> 00:10:06,670 We may want to add a bit of a filter to stabilize it but this is the value from our internal temperature 106 00:10:06,670 --> 00:10:11,600 sensor or being converted into its temperature value here. 107 00:10:11,680 --> 00:10:11,980 Right. 108 00:10:12,010 --> 00:10:18,410 So we read it from the ADC and then we use in this simple equation here to convert to its temperature. 109 00:10:18,460 --> 00:10:23,950 I'm going to put my hand on the MCU to see if I can influence the temperature a bit I place my hand 110 00:10:23,950 --> 00:10:24,280 here 111 00:10:31,810 --> 00:10:32,210 right. 112 00:10:32,780 --> 00:10:34,190 So that's all there is for this lesson. 113 00:10:34,190 --> 00:10:37,440 If you have any questions at all to send me a message. 114 00:10:37,620 --> 00:10:41,080 And over here we're using the timer to trigger the ADC as well. 115 00:10:41,090 --> 00:10:44,960 So we have the timer initialized and I'll see you later.