1 00:00:00,210 --> 00:00:00,420 Hello. 2 00:00:00,510 --> 00:00:01,020 Welcome back. 3 00:00:01,480 --> 00:00:01,680 OK. 4 00:00:01,890 --> 00:00:07,470 So let's go to a new threat, threat three, and we are going to, um, we're going to add that also 5 00:00:07,470 --> 00:00:12,750 to these threats for sending the four taken and sending the message. 6 00:00:12,840 --> 00:00:15,260 Basically, we're going to let it take, Becky. 7 00:00:15,660 --> 00:00:21,540 The key to the restroom and also be able to use the restroom, which is that you are out in our story. 8 00:00:21,960 --> 00:00:25,020 So using the same new text, we can use this as well. 9 00:00:25,320 --> 00:00:31,080 I'm going to copy this book over here and then paste it in our new thread, which is thread three. 10 00:00:31,140 --> 00:00:32,520 I'm going to comment this out. 11 00:00:36,370 --> 00:00:37,370 Patients over here. 12 00:00:38,050 --> 00:00:40,420 And, um, we're going to send a message. 13 00:00:43,740 --> 00:00:46,350 This message is going to be hello from threat to three. 14 00:00:49,650 --> 00:00:50,790 Going to come up here. 15 00:00:54,210 --> 00:00:58,170 And I know I'll say hello from three to three, right? 16 00:00:58,990 --> 00:01:03,910 And they know where to put the same amount of delay, which is tenements. 17 00:01:04,490 --> 00:01:07,930 So now we have hello from thread one, thread two and thread three. 18 00:01:08,540 --> 00:01:09,490 And then. 19 00:01:11,160 --> 00:01:12,450 Put this over here like this. 20 00:01:13,590 --> 00:01:15,930 Okay, let's put and see what we have. 21 00:01:16,050 --> 00:01:17,100 Click over here to build. 22 00:01:21,170 --> 00:01:21,610 Putin. 23 00:01:23,620 --> 00:01:24,770 To build successfully. 24 00:01:26,660 --> 00:01:28,140 And then click to debug. 25 00:01:35,880 --> 00:01:37,420 It's loaded, okay? 26 00:01:37,830 --> 00:01:39,890 We use in terror time in this experiment. 27 00:01:39,950 --> 00:01:48,540 So I'm going to exit this quick over here to come out of it and I'll come over here to a term, then 28 00:01:49,140 --> 00:01:56,820 select this three sort of baud rate to the appropriate value. 29 00:01:57,620 --> 00:01:58,470 This one over here. 30 00:01:59,220 --> 00:02:02,610 And then, OK, click away to reset. 31 00:02:05,990 --> 00:02:09,140 OK, we get in a bit of a conflict. 32 00:02:09,250 --> 00:02:09,650 Lizzie. 33 00:02:13,260 --> 00:02:16,520 And yet it's understandable why we should get this, OK? 34 00:02:16,920 --> 00:02:20,670 So what happens is the threats have the same priority. 35 00:02:21,240 --> 00:02:25,230 So if one threat has the key and the threat. 36 00:02:25,310 --> 00:02:25,510 Right. 37 00:02:25,510 --> 00:02:26,430 Loses the key. 38 00:02:27,480 --> 00:02:30,360 The other two threats, stop fighting for a key. 39 00:02:31,500 --> 00:02:35,440 So in a way, that is what creates this, um, this issue with a you. 40 00:02:36,390 --> 00:02:41,820 So when we have just two threads, one releases the key data, one just picks it up and then uses the 41 00:02:41,820 --> 00:02:42,170 key. 42 00:02:42,270 --> 00:02:44,710 But now we have two threads waiting. 43 00:02:45,150 --> 00:02:46,860 And they both have the same priority. 44 00:02:47,160 --> 00:02:49,500 So it's the one the other one believes is the key. 45 00:02:50,010 --> 00:02:51,420 No one is ahead of the other. 46 00:02:51,570 --> 00:02:52,350 The key is dropped. 47 00:02:52,380 --> 00:02:56,370 And then there is there's a conflict for who gets the key. 48 00:02:56,430 --> 00:03:01,620 That is I think that is what is manifested into the in the second one. 49 00:03:01,670 --> 00:03:02,500 It's up this way. 50 00:03:02,940 --> 00:03:08,550 But anyway, this is not the experiment we run in here that we can synchronize the threat further to, 51 00:03:08,550 --> 00:03:09,510 um, to let this arm. 52 00:03:09,630 --> 00:03:11,670 To let all of them work peacefully. 53 00:03:12,210 --> 00:03:12,620 We can, um. 54 00:03:12,690 --> 00:03:13,230 We can do that. 55 00:03:13,260 --> 00:03:14,320 But that's not experiment. 56 00:03:14,390 --> 00:03:15,960 We're going to see how to notify. 57 00:03:16,020 --> 00:03:16,860 Between threats. 58 00:03:17,220 --> 00:03:18,720 And furthermore, actually, we can um. 59 00:03:19,260 --> 00:03:24,930 Uh, a simple issue will be to reduce that learmount between the threat. 60 00:03:25,170 --> 00:03:26,730 So that do all work peacefully. 61 00:03:27,160 --> 00:03:31,950 Uh, a proper issue is to apply another form of synchronization between the threats. 62 00:03:32,410 --> 00:03:34,620 Well, let's go ahead and look at notification. 63 00:03:34,680 --> 00:03:37,020 I'll leave this for you as an assignment. 64 00:03:37,230 --> 00:03:41,980 If you if you've not found a way to make them more, you know what? 65 00:03:42,000 --> 00:03:43,550 Peacefully, then, um, leave it. 66 00:03:43,560 --> 00:03:44,900 And the questions and answers area. 67 00:03:45,130 --> 00:03:46,080 Why should it be an issue? 68 00:03:46,860 --> 00:03:49,260 Let's see how to create notifications. 69 00:04:28,510 --> 00:04:33,340 So we are going to notify thread number three from thread to using the, um, the push. 70 00:04:33,340 --> 00:04:40,870 But we was so when we pressed when we pressed the push button, which is often which is going to be 71 00:04:40,870 --> 00:04:47,110 read into it to a notification should be sent to thread three to use the, um. 72 00:04:47,290 --> 00:04:51,520 You ought to transmit its message, which is greetings from threat three. 73 00:04:51,970 --> 00:04:52,630 So let's do that. 74 00:04:54,250 --> 00:05:01,210 So I'm going to enable the, um, the push button and thread to again, um, this is what we did. 75 00:05:01,470 --> 00:05:07,670 I'm gonna come over here and then remove the comment and then, um, we can. 76 00:05:07,670 --> 00:05:10,630 No, I'm just gonna fetch all of this. 77 00:05:13,500 --> 00:05:14,270 This is how a. 78 00:05:15,620 --> 00:05:17,210 You quote using them UTX. 79 00:05:18,600 --> 00:05:19,600 Cut this. 80 00:05:21,960 --> 00:05:24,470 And then our place in here. 81 00:05:26,260 --> 00:05:32,650 So to, um, to send a notification, we need to use the, um, the task notify function. 82 00:05:33,130 --> 00:05:34,880 Come over here and say X task. 83 00:05:35,650 --> 00:05:38,910 Notify the first argument is the. 84 00:05:40,630 --> 00:05:42,290 It's the task you want to notify. 85 00:05:42,490 --> 00:05:44,810 And you have to pass the task on the. 86 00:05:44,870 --> 00:05:48,170 Remember the task on the list, like the idea of each task. 87 00:05:48,600 --> 00:05:50,200 We want to notify Task three. 88 00:05:50,300 --> 00:05:51,670 We need to task 300. 89 00:05:52,760 --> 00:05:53,010 Copy. 90 00:05:53,120 --> 00:05:55,370 Task or threat three from. 91 00:05:55,440 --> 00:05:55,710 Yeah. 92 00:05:58,990 --> 00:05:59,820 Come down here. 93 00:06:00,600 --> 00:06:01,640 Post this over here. 94 00:06:03,900 --> 00:06:09,520 The second argument is a flag that we can set, we can, um, there's a range, I think, you know, 95 00:06:09,630 --> 00:06:15,000 eight others up to eight PYT range of flags that we can set. 96 00:06:15,120 --> 00:06:18,090 This flag would be used to identify the notification. 97 00:06:18,090 --> 00:06:24,550 I'm going to set E X zero one and then I'm going to pass E set bit. 98 00:06:25,200 --> 00:06:29,030 So there are ways of notifying you can either set pits or disable it. 99 00:06:29,430 --> 00:06:30,930 So here we are set in bits. 100 00:06:31,110 --> 00:06:32,480 So our pass is set said bits. 101 00:06:32,610 --> 00:06:32,850 Yeah. 102 00:06:34,020 --> 00:06:38,670 So we send in the notification to thread three three three. 103 00:06:38,790 --> 00:06:42,510 We have to wait for the notification to arrive. 104 00:06:43,650 --> 00:06:47,520 So I'm going to go to thread three words or thread three. 105 00:06:47,890 --> 00:06:50,550 This is to reach over here. 106 00:06:51,700 --> 00:06:54,570 And in here we are going to use the next task. 107 00:06:54,630 --> 00:06:55,440 Notify wait. 108 00:06:55,490 --> 00:06:57,680 Function say X task. 109 00:07:01,270 --> 00:07:07,420 Notify wait and then pass PD force over here. 110 00:07:10,000 --> 00:07:11,650 And it's your X, F, f. 111 00:07:16,340 --> 00:07:17,600 And then at five value. 112 00:07:22,970 --> 00:07:27,400 And then PD Mux delay of port must delay. 113 00:07:38,110 --> 00:07:42,850 So we passed this here because we don't want it to reset the flags upon entry. 114 00:07:43,160 --> 00:07:46,600 And this one here resets all the flags before leaving. 115 00:07:46,930 --> 00:07:55,290 So upon entry, do not reset the flags and here reset the flags when leaving and the notify value. 116 00:07:55,300 --> 00:07:57,070 Here's the value that will be received. 117 00:07:57,340 --> 00:08:01,990 And this is what would we would use to confirm this is the notification we want. 118 00:08:02,620 --> 00:08:09,460 And postmarks delay means wait indefinitely for this notification to arrive if we don't use postmarks 119 00:08:09,490 --> 00:08:09,690 delay. 120 00:08:10,030 --> 00:08:15,220 And we use that time such as 5:00 a.m., as it can wait for five a.m., as if the notification doesn't 121 00:08:15,220 --> 00:08:15,580 arrive. 122 00:08:15,610 --> 00:08:18,460 It would proceed to execute the other lines of code. 123 00:08:18,890 --> 00:08:20,710 But here we are saying wait indefinitely. 124 00:08:22,180 --> 00:08:24,460 So we have to define notify value here. 125 00:08:26,120 --> 00:08:27,850 So you inferred you this underscore to. 126 00:08:30,040 --> 00:08:30,880 That's Five-fold. 127 00:08:40,880 --> 00:08:46,280 So, um, this variable here would have the notification value, you would have it. 128 00:08:46,730 --> 00:08:51,230 So we basically would declaring an empty verbal to start the notification value. 129 00:08:51,500 --> 00:08:54,590 And we've got to check the notification value if it's the one we're waiting for. 130 00:08:54,620 --> 00:08:58,550 And we can use the end, um, the logical end to do this. 131 00:08:58,580 --> 00:09:06,500 We can say if if notified value contains or our expected value. 132 00:09:06,530 --> 00:09:08,080 So I'll say if over here. 133 00:09:09,960 --> 00:09:16,280 And say, and your ex sure won because you can have notification coming from different tasks. 134 00:09:19,080 --> 00:09:20,880 If this is three quarters of zero. 135 00:09:26,210 --> 00:09:26,630 Right. 136 00:09:30,260 --> 00:09:36,740 If that's the case, then we can know it's the right notification, we can, um, transmit our data. 137 00:09:39,590 --> 00:09:42,890 Or just cut this and put it in the. 138 00:09:50,230 --> 00:09:50,650 Right. 139 00:09:51,370 --> 00:09:58,930 So we will received a notification because remember when we said send notification, we added this threat 140 00:09:58,990 --> 00:10:02,410 threat 3s, thread I.D. would that notification would arrive. 141 00:10:02,510 --> 00:10:08,950 And we confirm if this or X were one, then this is the notification that tells us to go ahead and use 142 00:10:08,950 --> 00:10:09,270 the U. 143 00:10:09,940 --> 00:10:15,010 We can have another notification coming from another thread, and that could be through extra, too. 144 00:10:15,040 --> 00:10:18,270 And we can check if it's so X to do this other action. 145 00:10:19,230 --> 00:10:19,460 Right. 146 00:10:21,020 --> 00:10:22,180 So what does this thread, too? 147 00:10:22,430 --> 00:10:25,760 I'm going to make sure that notification is sent when we press the button. 148 00:10:25,790 --> 00:10:27,440 So I'm going to cut this over here. 149 00:10:28,490 --> 00:10:31,010 The task notify function. 150 00:10:32,470 --> 00:10:33,460 I'm going to put it here. 151 00:10:33,520 --> 00:10:36,640 This is the action that we take when the pattern is pressed. 152 00:10:37,190 --> 00:10:38,650 So won't the button is pressed. 153 00:10:38,740 --> 00:10:39,880 We want to do two things. 154 00:10:39,910 --> 00:10:45,700 We want to send notification to thread three, as well as print our threat to message. 155 00:10:46,270 --> 00:10:47,920 But this is not really relevant here. 156 00:10:48,680 --> 00:10:48,970 OK. 157 00:10:49,480 --> 00:10:50,350 But we can keep it. 158 00:10:51,910 --> 00:10:53,890 And then let's Putin see what we have. 159 00:10:54,220 --> 00:10:55,660 Let's hope we have no errors. 160 00:11:00,550 --> 00:11:00,780 OK. 161 00:11:01,030 --> 00:11:01,930 We've got no arrow. 162 00:11:02,110 --> 00:11:03,060 Let's get onto the board. 163 00:11:03,190 --> 00:11:03,980 Click over here. 164 00:11:06,280 --> 00:11:07,230 It's downloaded. 165 00:11:14,380 --> 00:11:15,480 Download in. 166 00:11:17,720 --> 00:11:17,930 OK. 167 00:11:18,320 --> 00:11:19,030 It's downloaded. 168 00:11:19,190 --> 00:11:21,530 Going to escape by coming out of it. 169 00:11:21,730 --> 00:11:23,510 I'm going to terror attempt to see where we have. 170 00:11:26,700 --> 00:11:27,190 AK. 171 00:11:28,610 --> 00:11:35,480 When I select the port, this one over here, then I set the board rate to the appropriate value. 172 00:11:38,330 --> 00:11:42,530 This one over here, we have Cretans from threat one. 173 00:11:44,180 --> 00:11:49,140 As see, as I pressed the button, we see Cretans from threat three and threat to let me just increase 174 00:11:49,140 --> 00:11:53,550 the font size so that we all see what we see properly. 175 00:11:57,060 --> 00:11:57,710 It's open in. 176 00:11:59,910 --> 00:12:01,330 A select 14 here. 177 00:12:01,470 --> 00:12:03,220 Then I'm going to use this one. 178 00:12:03,730 --> 00:12:05,020 See the council. 179 00:12:06,390 --> 00:12:07,970 OK, so this is it. 180 00:12:08,750 --> 00:12:10,100 Greetings from threat one. 181 00:12:10,460 --> 00:12:11,690 The Botin is not prest. 182 00:12:25,260 --> 00:12:28,860 So I'm going to select 14 over here and then use this font. 183 00:12:29,820 --> 00:12:30,600 And now it's bigger. 184 00:12:31,770 --> 00:12:32,060 OK. 185 00:12:33,450 --> 00:12:36,450 So this is third one only sent. 186 00:12:36,570 --> 00:12:42,630 Remember, we only send a message from three to when the button is pressed and at the same time we send 187 00:12:42,630 --> 00:12:43,710 a notification as well. 188 00:12:44,160 --> 00:12:45,670 So the button is no press. 189 00:12:45,690 --> 00:12:47,010 No, I'm going to press the button. 190 00:12:47,520 --> 00:12:51,560 You can see we find greetings from Threat three and then greetings from threat to us. 191 00:12:51,570 --> 00:12:53,130 Well, right. 192 00:12:53,190 --> 00:12:55,230 Because of what we are Twyning threat to. 193 00:12:57,550 --> 00:12:57,870 OK. 194 00:12:59,400 --> 00:13:03,330 So in threat number two, just to point out. 195 00:13:03,480 --> 00:13:07,680 When a botanist press, we send a notification and then we print out what threat to message. 196 00:13:08,080 --> 00:13:12,040 And when we send a notification threat, three receives the notification. 197 00:13:12,600 --> 00:13:14,160 And then it's printed message. 198 00:13:14,670 --> 00:13:19,680 So this weather is this is how to send notification between friends or even amongst threats. 199 00:13:20,010 --> 00:13:24,990 I advise you to, um, experiment more, try to send a notification coming from threat one as well. 200 00:13:25,890 --> 00:13:28,500 And then check that is the right notification. 201 00:13:28,530 --> 00:13:32,490 Just give it a different notification value and then take an appropriate action. 202 00:13:33,150 --> 00:13:33,750 That's all there is. 203 00:13:33,880 --> 00:13:34,590 I'll see you later.