1 00:00:00,660 --> 00:00:00,920 Hello. 2 00:00:01,060 --> 00:00:01,720 Welcome back. 3 00:00:01,720 --> 00:00:06,060 So in this lesson we're going to ball task Creighton. 4 00:00:06,160 --> 00:00:08,500 We're going to create tasks from scratch. 5 00:00:08,500 --> 00:00:11,860 And in this lesson we're going to create four tasks. 6 00:00:11,860 --> 00:00:18,000 These tasks are going to manage four entities on the Discovery board. 7 00:00:18,160 --> 00:00:19,610 So let's get ahead with it. 8 00:00:19,630 --> 00:00:26,060 I'll just quit Project Uplift project and come over here and I'm going to create a new folder. 9 00:00:26,110 --> 00:00:31,360 Call this number one and I'll call this task of creation 10 00:00:36,560 --> 00:00:39,560 and then I'm going to call the project to task 11 00:00:42,850 --> 00:00:46,590 on the school charging my board. 12 00:00:46,640 --> 00:00:49,480 Assume that's 2 4 1 1. 13 00:00:50,060 --> 00:01:02,550 I select click OK and on The Simpsons I need to call on the device and it starts up because we're using 14 00:01:02,560 --> 00:01:03,810 the LCD. 15 00:01:03,820 --> 00:01:09,160 We need the estimates to keep the framework classic over here like this. 16 00:01:09,410 --> 00:01:11,290 I click it to resolve. 17 00:01:11,290 --> 00:01:15,660 Then I just minimize this. 18 00:01:15,690 --> 00:01:18,870 And then under artist I select three answers. 19 00:01:18,960 --> 00:01:25,240 And then with free answers I select to buy here under config I choose free actors. 20 00:01:25,240 --> 00:01:26,940 Then a clue to the files I want. 21 00:01:26,940 --> 00:01:29,140 I want a config file I want to call. 22 00:01:29,320 --> 00:01:32,260 I want it before we can change the heat. 23 00:01:32,280 --> 00:01:39,800 If we want to let's just stick with it for for a while and then select time as we might use time as 24 00:01:40,010 --> 00:01:41,200 I click OK. 25 00:01:41,370 --> 00:01:47,880 That is set and I'm going to change the target to make to the name of my target as. 26 00:01:47,910 --> 00:01:49,830 That's 2 4 1 1 27 00:01:52,560 --> 00:01:53,270 overhead. 28 00:01:53,540 --> 00:01:58,870 I just this to compete and I'm going to create a new file called the main 29 00:02:01,630 --> 00:02:14,450 main see and I just set up my target my barcodes the SD link Barker on the settings I select flushed 30 00:02:14,450 --> 00:02:18,670 out i click over here reset and right click Okay. 31 00:02:19,070 --> 00:02:23,230 Then that flies on the target. 32 00:02:23,230 --> 00:02:32,720 Sorry about this optimize my excel by saying it's 16 megahertz this the default external value of my 33 00:02:32,720 --> 00:02:33,590 microcontroller. 34 00:02:33,590 --> 00:02:40,180 And then I just included the head of force we need we need SDM that's 2 F for how not h need a free 35 00:02:40,180 --> 00:02:45,160 arbiters of age and then we need the task H which is part of the free. 36 00:02:45,160 --> 00:02:54,890 Our test files for this right click include files and then over here is tempted to F for exits although 37 00:02:54,980 --> 00:03:06,070 H then why click again include file three artists H and then right click again include files task the 38 00:03:06,140 --> 00:03:15,080 edge like this so I'll just move on with initialize into entities so like we did it now gets and starts 39 00:03:15,080 --> 00:03:23,420 at Project we we created created symbolic names for our early days I'll just bring all of that here 40 00:03:23,450 --> 00:03:24,200 like this. 41 00:03:24,350 --> 00:03:32,850 This is just redefining the entities on the board a 12th year is for Queen entity thirteen is for or 42 00:03:32,860 --> 00:03:38,750 range fourteen is for Red fifteen is complete so whenever we need to toggle these pins we just use these 43 00:03:38,750 --> 00:03:39,140 names. 44 00:03:39,140 --> 00:03:49,040 This what this does is once that is done I'll just bring the routine for initialize and the entity before 45 00:03:49,040 --> 00:03:56,990 I do that I'll just put my intimate close the throttle usual not to have main so used to the main 46 00:04:04,230 --> 00:04:13,540 and I can break my unit here you pay it sorry and then I just copy and I call the prototype up nice 47 00:04:13,550 --> 00:04:21,670 and clean and once we've done this next thing we need to do is just come over here and then initialize 48 00:04:21,670 --> 00:04:30,820 the UK patents just by calling the GPL it's declared like this and once we get to this stage all we 49 00:04:30,820 --> 00:04:39,460 have to do is use our X task create API and then creates default tasks and then creates the task function 50 00:04:39,460 --> 00:04:44,090 for the task and then just run the experiment right. 51 00:04:44,950 --> 00:04:53,280 So from that gets and started projects like you to post this video and see if you can run this experiment 52 00:04:53,310 --> 00:05:00,530 on your own positive video try to create four tasks each task talking with the entity each entity on 53 00:05:00,530 --> 00:05:08,210 the board and let's see how you do it give all tasks the same priority so I'm gonna post to feed you 54 00:05:08,210 --> 00:05:13,640 and expect you to pull shows it might take you about ten minutes to complete that then let's see 55 00:05:17,430 --> 00:05:25,500 right I'm sure you cried out just trust you did so once you've tried to see what we can come up with 56 00:05:26,070 --> 00:05:36,930 so we use the x tiles create API so I start by just taking x task create like this and as we saw earlier 57 00:05:37,920 --> 00:05:44,840 this API your function takes six argument and this time we're going to write the arguments that's going 58 00:05:44,900 --> 00:05:50,160 to write the argument basically like this this is much more readable and it makes it easier to understand 59 00:05:50,250 --> 00:05:56,940 once our project begins to increase in size the first task is going to be the plurality controller. 60 00:05:57,300 --> 00:06:03,600 So the way to write this is to start with field because its returns are void remember tasks functions 61 00:06:03,600 --> 00:06:10,260 return a void and we name we named functions and free artists according to what a return. 62 00:06:10,410 --> 00:06:23,550 So V gets for voice I'm going to call this task function the B O U for blue blue D controller task like 63 00:06:23,550 --> 00:06:31,320 this and once that is done I'm going to give this task a name and the name of the task is going to be 64 00:06:31,320 --> 00:06:34,080 blue controller very descriptive 65 00:06:36,570 --> 00:06:38,840 Cruella right. 66 00:06:38,860 --> 00:06:41,160 And then I'm going to give it a tax size. 67 00:06:41,230 --> 00:06:45,940 I'm going to give it one concrete over here like this. 68 00:06:46,150 --> 00:06:51,970 And then once that is done in this project we're not passing in it parameters to the task function. 69 00:06:51,990 --> 00:06:54,380 So I'm just going to put it not over here. 70 00:06:54,400 --> 00:06:57,120 This is cops. 71 00:06:57,730 --> 00:07:03,510 I'm going to assign a task a priority of one shot at one over here like this. 72 00:07:03,660 --> 00:07:07,670 And for now we don't need to create a condo for this task. 73 00:07:07,680 --> 00:07:11,100 So I'm going to put it now as well. 74 00:07:12,960 --> 00:07:15,130 So we've created this task. 75 00:07:15,150 --> 00:07:20,040 All we need to do to complete this task is to ask the task function to it. 76 00:07:21,210 --> 00:07:28,050 So write it on you know type in an increase in the typing noise or just copy and paste this and rename 77 00:07:28,050 --> 00:07:31,380 it for the other tasks come here. 78 00:07:31,550 --> 00:07:34,820 And this is going to be for the read. 79 00:07:35,040 --> 00:07:41,880 This next one will be for the orange and this last one which I'll put here would be for the green. 80 00:07:42,090 --> 00:07:46,580 So I can just come over here and change the respective colors. 81 00:07:46,650 --> 00:07:51,730 This is going to be red. 82 00:07:52,580 --> 00:07:56,030 It's going to be orange. 83 00:07:56,300 --> 00:07:56,750 This green 84 00:08:00,330 --> 00:08:03,780 and I can just change the descriptive names we gave the task. 85 00:08:04,090 --> 00:08:04,730 We read 86 00:08:07,400 --> 00:08:07,830 arranged 87 00:08:10,600 --> 00:08:14,740 and then green with added more Q the same priority from now. 88 00:08:14,740 --> 00:08:23,060 Now to know once we've once we've created tasks we need to create the task function for each task. 89 00:08:23,060 --> 00:08:24,560 Now I'm going to do it down here. 90 00:08:24,560 --> 00:08:30,740 Just keep everything clean and then once it's done I'll declare the prototypes up there to make it reachable 91 00:08:30,980 --> 00:08:39,570 so task functions return a void and start with the first blue to show you what I mean and I'll just 92 00:08:39,570 --> 00:08:54,380 copy the name of a task function forward type A mistake is and then argument is Floyd stop TV from each 93 00:08:54,380 --> 00:08:56,440 year. 94 00:08:57,330 --> 00:08:57,720 This 95 00:09:02,390 --> 00:09:04,500 would put a wall like this 96 00:09:09,440 --> 00:09:17,390 and basically what we're going to do is we're going to talk to her so I could come and see on this score 97 00:09:17,390 --> 00:09:23,210 GPA or let's call Tokyo chalk or pen and the ports. 98 00:09:23,340 --> 00:09:35,480 Keep Dee Dee Dee and I need to just leave it like this and we can create our pseudo delay here we can 99 00:09:35,480 --> 00:09:47,270 see for all you've caught zero and let's see seven hundred thousand I this less than seven hundred thousand 100 00:09:48,400 --> 00:09:54,350 will create precise delays later for these experiments we just take things step by step plus plus and 101 00:09:54,350 --> 00:10:01,760 then we just let us do nothing and we create the local variable tied up here like this and the task 102 00:10:01,760 --> 00:10:08,270 function is complete to what I have to do now is just create the task function for red orange and green 103 00:10:08,270 --> 00:10:17,720 and I can just simply do it by duplicating this why and renaming it one two three four I hear the word 104 00:10:17,720 --> 00:10:23,570 cloud becomes red I hear the word blue becomes orange 105 00:10:26,620 --> 00:10:28,750 and of course overhead it becomes green 106 00:10:32,950 --> 00:10:35,660 we can change the L.A. colors. 107 00:10:35,660 --> 00:10:37,150 So this one is totally empty. 108 00:10:37,220 --> 00:10:41,320 This one is totally in red. 109 00:10:43,070 --> 00:10:48,550 Third point is to quit talking and arrange things like this. 110 00:10:48,550 --> 00:10:50,540 And this fourth one is totally in green 111 00:10:55,300 --> 00:10:56,100 suit. 112 00:10:56,380 --> 00:10:58,990 No no we're finished declaring task functions. 113 00:10:58,990 --> 00:11:00,970 We just need to put out prototypes up there. 114 00:11:01,000 --> 00:11:07,170 I'm just going to grab the prototype of this and then rename it put it up here. 115 00:11:07,660 --> 00:11:10,330 One two three four. 116 00:11:10,420 --> 00:11:17,500 Then I put a call on her something called me called on and then some calls and this becomes 117 00:11:21,820 --> 00:11:22,290 red 118 00:11:26,050 --> 00:11:26,680 range 119 00:11:32,210 --> 00:11:37,470 for green. 120 00:11:37,770 --> 00:11:42,070 Yeah we forgot the semicolon for a law toss create function. 121 00:11:42,300 --> 00:11:44,010 So we just the same lunch here. 122 00:11:45,260 --> 00:11:48,400 So like I said this is much more readable. 123 00:11:50,870 --> 00:12:00,090 So everything is set with the tasks we've initialized the GPL pins and we've created a task functions 124 00:12:00,110 --> 00:12:00,950 as well. 125 00:12:00,980 --> 00:12:06,670 All we need to do is start the schedule on how we use the V task start scheduler. 126 00:12:07,520 --> 00:12:08,150 Come here. 127 00:12:08,270 --> 00:12:10,210 Talks start. 128 00:12:11,570 --> 00:12:16,180 Should look like this. 129 00:12:16,890 --> 00:12:17,340 Yeah. 130 00:12:17,450 --> 00:12:23,490 And we can just keep our empty world while the main function 131 00:12:26,200 --> 00:12:27,540 right we set. 132 00:12:27,550 --> 00:12:35,440 So all I need to do now is build my project and once this is done I just click here to download onto 133 00:12:35,440 --> 00:12:40,550 my port and as you can see all these uplink. 134 00:12:40,960 --> 00:12:41,760 So this is it. 135 00:12:41,860 --> 00:12:45,300 This is task creation we've created four tasks. 136 00:12:45,400 --> 00:12:52,210 If I assign them all the same stack size and the same priority cost at all with the same priority there's 137 00:12:52,240 --> 00:12:55,810 a bit of time sharing going on among them. 138 00:12:56,050 --> 00:13:00,960 So that's all there is for this project and I shall see you in the next lesson.