1 00:00:00,660 --> 00:00:01,690 Hello, welcome back. 2 00:00:01,830 --> 00:00:04,270 In this lesson, we go into crisis. 3 00:00:04,440 --> 00:00:13,080 We're going to create a simple you out driver to help us to be able to send information from our microcontroller 4 00:00:13,080 --> 00:00:20,280 to our computer so that we can view the properties of our neural network as we develop it. 5 00:00:20,920 --> 00:00:25,170 So I'm going to create a new project by coming to project new project. 6 00:00:27,210 --> 00:00:30,840 And I have a folder here I'm going to call this. 7 00:00:33,680 --> 00:00:36,150 I call this simple, you watch. 8 00:00:39,510 --> 00:00:47,010 And my board, my and my board is the SDM fetch to EFORE won one seat. 9 00:00:48,090 --> 00:00:49,830 I have the new clipboard of this. 10 00:00:49,950 --> 00:00:55,860 I'll click OK over here and the Simms's also like to call on the device. 11 00:00:55,860 --> 00:00:56,910 Isolette, start up. 12 00:00:57,090 --> 00:01:00,300 I'll say OK here and target here. 13 00:01:00,300 --> 00:01:04,110 I'm going to give the name of my board SDM 32 F4. 14 00:01:06,070 --> 00:01:10,930 I'll drop down here, so this group here, I'm going to call this Eppy. 15 00:01:13,550 --> 00:01:21,170 Right, and I'm going to create two files or you [REMOVED] three files here at item iSelect, see, I call 16 00:01:21,170 --> 00:01:23,890 this mean this is going to be our main file. 17 00:01:24,260 --> 00:01:25,370 Oh, I don't know the file. 18 00:01:25,520 --> 00:01:25,910 Right. 19 00:01:25,910 --> 00:01:27,740 Click right. 20 00:01:27,740 --> 00:01:32,300 Click on up over here at item C again. 21 00:01:32,300 --> 00:01:41,690 I'm going to call this you out and then I'm going to add the interface file, which is the far right 22 00:01:41,690 --> 00:01:45,770 click add item over here. 23 00:01:45,960 --> 00:01:49,100 I call it you got like this. 24 00:01:50,990 --> 00:01:55,620 Why do we have this memory for you, interest in Iraq? 25 00:01:58,440 --> 00:02:03,920 Right, so, um, we would have to create the other driver, a very simple one. 26 00:02:04,020 --> 00:02:13,100 Those of you who have seen other causes of mine, like the the bare metal programming courses for developing 27 00:02:13,100 --> 00:02:18,770 drivers, you already know how to do this before the rest of you who are new to my courses. 28 00:02:19,040 --> 00:02:22,350 I'm going to take you through the steps of initialise in the. 29 00:02:24,260 --> 00:02:24,920 So the U. 30 00:02:24,920 --> 00:02:33,590 R stands for Universal Asynchronous Receiver transmitter and we can use it to transfer messages or data 31 00:02:33,770 --> 00:02:38,630 between two devices and the two devices can be a microcontroller and a computer. 32 00:02:39,380 --> 00:02:46,100 So in order to find out how to initialize any petrol at all of the microcontroller, we need to visit 33 00:02:46,100 --> 00:02:49,720 the datasheet or the reference manual of the microcontroller. 34 00:02:50,000 --> 00:02:56,720 And if you are using cardioversion, you can find it over here on the books or just come over here books 35 00:02:57,800 --> 00:03:03,560 and I'll select the the reference manual by double click. 36 00:03:03,560 --> 00:03:04,130 And this. 37 00:03:08,000 --> 00:03:12,680 And there's the reference manual of the microcontroller, and what I'm looking for is the block diagram 38 00:03:12,680 --> 00:03:16,610 showing me the Depass connection of my microcontroller. 39 00:03:20,500 --> 00:03:21,140 Let's see. 40 00:03:21,250 --> 00:03:27,300 OK, we find a block diagram in the data sheet so we can come back here and double click on datasheet 41 00:03:27,880 --> 00:03:29,430 and this is datasheet. 42 00:03:30,220 --> 00:03:31,900 OK, so this is what we're looking for. 43 00:03:32,920 --> 00:03:38,840 And we're looking for this because we want to know how to initialize the clock to the Ewart's module. 44 00:03:39,580 --> 00:03:51,040 So in the in the past, I'll see in about 20 years ago, microcontrollers had block access enabled on 45 00:03:51,040 --> 00:03:54,400 all peripherals by default and by all peripherals. 46 00:03:54,400 --> 00:04:04,450 I mean the pedobear module that you are module the let's say ATC all had clock access enabled by default. 47 00:04:04,900 --> 00:04:10,570 And if we have block access enabled by default, it makes the microcontroller consume more power. 48 00:04:11,020 --> 00:04:17,950 So although we might not be using a particular Peiffer or module because clock is enabled to the module, 49 00:04:18,430 --> 00:04:26,040 some power is consumed because of this, something known as the clock gating mechanism was invented. 50 00:04:26,470 --> 00:04:35,200 And what a clock counting mechanism does is that it allows us to just shut the clock off for every peripheral 51 00:04:35,680 --> 00:04:42,610 and we enable clock access only to the peripherals that we want to use only to the peripherals that 52 00:04:42,610 --> 00:04:43,150 we need. 53 00:04:43,600 --> 00:04:48,590 So in this case, the only peripheral we need is the peripheral or the other module. 54 00:04:49,090 --> 00:04:51,940 So we going to enable clock access to the UAT. 55 00:04:52,390 --> 00:04:56,230 So we have to find the bus that it is connected to. 56 00:04:56,920 --> 00:05:00,190 So I'm over here in this block diagram and I'm going to zoom in a bit. 57 00:05:05,080 --> 00:05:13,330 Right, so let's see, so GPI is connected to this bus, you can use this area to see GPS is connected 58 00:05:13,330 --> 00:05:16,290 to AHP one bus, right. 59 00:05:16,510 --> 00:05:18,400 And you'll be connected here. 60 00:05:18,400 --> 00:05:23,630 So if we want to enable the port, we would have to enable them through this bus. 61 00:05:24,160 --> 00:05:30,260 So what we're looking for is you are we going to use you at two as you can see it over here? 62 00:05:30,280 --> 00:05:41,050 It's called you sat here because we can use this module known as use that for both Synchronoss and asynchronous, 63 00:05:41,650 --> 00:05:44,170 uh, receiver transmitter transfer. 64 00:05:44,470 --> 00:05:50,130 So Usategui stands for Universal Synchronoss, asynchronous receiver transmitter. 65 00:05:50,470 --> 00:05:52,150 But we are looking for just that. 66 00:05:52,150 --> 00:05:58,480 You add without the S and it's the same in the same module can be configured for both Synchronoss and 67 00:05:58,480 --> 00:05:59,170 asynchronous. 68 00:05:59,170 --> 00:06:00,020 So you need not worry. 69 00:06:00,370 --> 00:06:01,510 So that's what we're looking for. 70 00:06:02,570 --> 00:06:11,220 And as we can see over here, it is connected to the APB, one bus app, one bus. 71 00:06:11,680 --> 00:06:12,090 Right. 72 00:06:12,100 --> 00:06:15,040 So we need to enable clock access to app one. 73 00:06:16,270 --> 00:06:21,730 We need to go through the app one register set and then enable use that clock. 74 00:06:22,040 --> 00:06:22,690 That is one. 75 00:06:23,140 --> 00:06:28,840 One other thing is our you start or you add is connected to a standard Jhpiego pin. 76 00:06:29,770 --> 00:06:31,870 And this also requires explanation. 77 00:06:32,740 --> 00:06:39,370 So for those of you who are new to microcontrollers, often we have copies. 78 00:06:40,000 --> 00:06:45,130 Those are the to see the basic peripherals that you need. 79 00:06:46,180 --> 00:06:50,020 The Galopin allows for input and output. 80 00:06:50,020 --> 00:06:55,050 In fact, the word GPA stands for general purpose input output. 81 00:06:56,080 --> 00:06:56,540 Right. 82 00:06:56,560 --> 00:07:03,340 We have copies and S.P.I opens and Spyro stands for. 83 00:07:06,410 --> 00:07:08,850 Special purpose, input output. 84 00:07:09,530 --> 00:07:17,780 So we've got general-purpose input output and special purpose input output, the GPU, PIN and spin 85 00:07:19,640 --> 00:07:21,450 are physically the same. 86 00:07:22,430 --> 00:07:29,480 And what I mean by this is that we would have to configure through software to decide whether a particular 87 00:07:29,480 --> 00:07:35,210 PIN should act as a standard GPU, which is. 88 00:07:35,450 --> 00:07:41,630 Yeah, general purpose, input output, or we want it to be SPU special purpose, input output. 89 00:07:42,680 --> 00:07:50,810 So for instance, if you want to configure an ADC module, you would have to select the pin that your 90 00:07:50,810 --> 00:07:52,100 sensor is connected to. 91 00:07:52,310 --> 00:07:57,830 You've got to set that up in a special purpose being the special purpose setting. 92 00:07:57,830 --> 00:08:01,110 We often call this as alternate function mode. 93 00:08:01,760 --> 00:08:07,160 So if you check the datasheet or the reference manual of any microcontroller, you would see that there's 94 00:08:07,160 --> 00:08:11,470 a part that talks about how to configure the pin as an alternate function pin. 95 00:08:11,480 --> 00:08:14,050 This means configuring it for special purpose. 96 00:08:14,570 --> 00:08:23,600 So our you at our receiver line and transmitter line are internally connected to some Gilpin's and we've 97 00:08:23,600 --> 00:08:27,260 got to configure these KPIs for special purpose. 98 00:08:28,250 --> 00:08:33,020 And these are the P, A two and a three. 99 00:08:33,440 --> 00:08:37,910 So put it over here, put a pin to import a PIN three. 100 00:08:38,480 --> 00:08:40,340 We would need to configure them as well. 101 00:08:40,350 --> 00:08:47,030 And like I said, those of you who are already familiar with working with a UAT and initialize in peripherals, 102 00:08:47,030 --> 00:08:48,800 you probably know all of this already. 103 00:08:48,800 --> 00:08:54,970 So you can skip this lesson if you want and just download the resources and continue from there. 104 00:08:56,960 --> 00:08:57,150 So. 105 00:08:57,240 --> 00:08:57,650 Right. 106 00:08:58,100 --> 00:09:06,770 We would need to we need to configure Jhpiego A because our our experience connected to a three and 107 00:09:06,770 --> 00:09:09,200 then our T experience connected to you. 108 00:09:09,650 --> 00:09:12,040 And we need to configure you Satya as well. 109 00:09:12,530 --> 00:09:16,880 And this is because you said it's a special purpose function, so. 110 00:09:17,000 --> 00:09:17,390 Yeah. 111 00:09:18,230 --> 00:09:21,170 So that's some of the information we need. 112 00:09:21,170 --> 00:09:29,180 We can get started with this, going to minimize this and we can start off in a way where we can start 113 00:09:29,180 --> 00:09:30,680 off over here in our use of. 114 00:09:36,490 --> 00:09:41,370 I don't know why I have this, we can start off in the USA Today HFA. 115 00:09:49,920 --> 00:09:52,770 And I can start off by saying, if not defined, defined. 116 00:10:05,140 --> 00:10:08,230 I've always called you out on a school age. 117 00:10:21,530 --> 00:10:24,410 And then we end if here like this and if. 118 00:10:29,480 --> 00:10:37,700 Right, and we we're going to have a number of functions, we going to create a function to initialize 119 00:10:37,700 --> 00:10:39,150 the user to module. 120 00:10:39,170 --> 00:10:46,280 So I'm just going to say void use to underscore in it over here like this. 121 00:10:53,890 --> 00:11:03,760 And this void, void function, and we're going to have another function to help us, actually, we're 122 00:11:03,760 --> 00:11:05,410 not going to expose the other functions. 123 00:11:05,410 --> 00:11:11,770 We're going to have just this function and we're going to use print F from the C standard library to 124 00:11:11,770 --> 00:11:15,010 send our information to. 125 00:11:15,010 --> 00:11:15,880 Let's keep just this. 126 00:11:15,880 --> 00:11:19,900 We can go to the USOC file and include the rage. 127 00:11:25,410 --> 00:11:32,190 Right, so we can include our interface file here in our Dossey file or just say, include 128 00:11:35,040 --> 00:11:38,610 you out today like this. 129 00:11:43,330 --> 00:11:50,110 So once that is done, we can implement this function that we have written the head for 130 00:11:52,780 --> 00:12:01,480 open and close, we said we've got to enable clock for you at. 131 00:12:05,310 --> 00:12:12,450 And it is connected from our reference manual, we said it's connected to APB, one bus, so we need 132 00:12:12,450 --> 00:12:17,280 to go to the datasheet and see what an APB one. 133 00:12:17,280 --> 00:12:18,360 Can we locate our. 134 00:12:18,360 --> 00:12:19,150 You ought to. 135 00:12:21,000 --> 00:12:22,290 So I'm going to go back. 136 00:12:22,290 --> 00:12:24,210 I kept the files here. 137 00:12:25,950 --> 00:12:32,490 I'm going to go back to our reference, my no document and I'm going to search APB one. 138 00:12:40,460 --> 00:12:52,520 Can press control F and then you can simply type one, APB one, and we're looking for the APB one and 139 00:12:52,520 --> 00:12:53,450 they will register. 140 00:12:56,530 --> 00:13:03,130 So I'll click this and let's see, we have our RACC, HP. 141 00:13:12,250 --> 00:13:18,430 Let's see, so for those of you who already know how to do this, like I said, you can skip this. 142 00:13:18,440 --> 00:13:24,910 But for those of you who want to see how such a driver can be initialised, you can just stick with 143 00:13:24,910 --> 00:13:25,480 me here. 144 00:13:26,380 --> 00:13:28,330 So this is the app one here. 145 00:13:29,410 --> 00:13:33,060 And we are dealing with the app One Enabler Register. 146 00:13:33,760 --> 00:13:36,980 And as you can see, this is a 32 bit register. 147 00:13:37,000 --> 00:13:38,080 It starts from zero. 148 00:13:38,080 --> 00:13:42,730 It ends up 31 and bits zero belongs to time. 149 00:13:42,730 --> 00:13:43,390 A two bit. 150 00:13:43,390 --> 00:13:48,310 One belongs to time, a three bits two blocks to time before and so on and so forth. 151 00:13:49,150 --> 00:13:56,260 Um, let's see what we have and you can find this out by actually reading more. 152 00:13:57,070 --> 00:14:02,770 So over here, what it means is if this bit is set to one, then we want to enable time or two. 153 00:14:03,010 --> 00:14:06,190 If it's set to zero, then we want to disable time or two. 154 00:14:06,460 --> 00:14:08,210 And the information is provided here. 155 00:14:08,800 --> 00:14:10,420 So let's see over here. 156 00:14:10,420 --> 00:14:13,750 It says it's given the bit numbers here. 157 00:14:13,750 --> 00:14:15,110 I'm looking for pit number zero. 158 00:14:15,130 --> 00:14:22,140 So it says over here, but number zero, set and cleared by software zero means time to clock disabled. 159 00:14:22,150 --> 00:14:24,070 One means time or two clock enabled. 160 00:14:24,880 --> 00:14:30,760 And our you at two is connected to pit number 17. 161 00:14:31,330 --> 00:14:35,470 As you can see, zero means you start to clock disabled. 162 00:14:35,470 --> 00:14:39,640 One means you start to clock enabled. 163 00:14:39,940 --> 00:14:45,140 So we want to pass the number one at bit seventeen here to this register. 164 00:14:45,550 --> 00:14:49,770 This is what would allow us to enable clock access to our users to. 165 00:14:50,230 --> 00:14:51,580 So that's what we're going to do now. 166 00:14:53,020 --> 00:15:04,330 So come over here and I'll see RACC app one enable register, the one we just saw. 167 00:15:07,910 --> 00:15:16,910 And I'm going to pass hexadecimal code here also is your X two and then four zeros, one, two, three, 168 00:15:16,910 --> 00:15:17,200 four. 169 00:15:17,210 --> 00:15:24,890 And this corresponds to certain bit number bit number 17 to set in each one. 170 00:15:24,890 --> 00:15:28,590 Remember, we start counting from zero, right? 171 00:15:33,130 --> 00:15:38,640 And the reason we have in this is because we've not included the header file for our microcontroller, 172 00:15:38,650 --> 00:15:43,650 so I'll come over here and I'll do right click include ASTM. 173 00:15:43,660 --> 00:15:45,750 That's two for storage. 174 00:15:46,630 --> 00:15:48,430 When I come here, you should disappear. 175 00:15:49,780 --> 00:15:50,200 Right. 176 00:15:51,400 --> 00:15:53,380 And then I'll comment here. 177 00:15:56,760 --> 00:15:58,620 There's also a enable clock. 178 00:16:04,920 --> 00:16:08,900 For you sought to, right? 179 00:16:09,900 --> 00:16:18,870 So once we've done this, we need to enable the clock for port because our T, X and our X lines are 180 00:16:18,870 --> 00:16:22,580 connected to two and three, respectively. 181 00:16:23,130 --> 00:16:25,500 So I'm going to come back to RACC. 182 00:16:26,130 --> 00:16:33,910 And in the block diagram, we realize that port, it was connected to the HP, Busse, HP one back. 183 00:16:33,930 --> 00:16:43,830 So I'm going to see HP, one enabler register and I'm going to I'm going to pass one here, zero x one 184 00:16:44,700 --> 00:16:51,120 like this, because the first bit in the register corresponds to Port A and a better way of doing it 185 00:16:51,120 --> 00:16:52,890 is put in this vertical line here. 186 00:16:53,190 --> 00:16:55,440 And this is what is known as friendly programming. 187 00:16:55,680 --> 00:16:59,780 When we put a vertical line, it only changes the bits that we want to change. 188 00:17:00,060 --> 00:17:07,800 So when we include this only bit 17 is changed and when we include it includes only bits, one is changed, 189 00:17:07,800 --> 00:17:14,010 meaning if the register had a different value, everything else is going to remain the same in the register. 190 00:17:14,040 --> 00:17:20,880 Apart from the bits that we want to change, this is known as friendly programming as opposed to this. 191 00:17:20,880 --> 00:17:26,010 When we do this, meaning we clean everything in the register and we write a new value and this new 192 00:17:26,010 --> 00:17:29,700 value is going to be zero zero zero zero zero zero zero zero zero zero zero one. 193 00:17:30,090 --> 00:17:33,600 It's going to be thirty one zeros and then one. 194 00:17:33,600 --> 00:17:35,380 Yeah, something of that nature. 195 00:17:35,850 --> 00:17:36,330 Right. 196 00:17:36,540 --> 00:17:43,380 But because we want everything else to remain the same, apart from just bits, one, we put this vertical 197 00:17:43,380 --> 00:17:44,610 line here like this. 198 00:17:45,680 --> 00:17:47,930 If you do not understand this, you can send me a message. 199 00:17:48,330 --> 00:17:50,730 So once we've done this, we've got to set GPL. 200 00:17:50,760 --> 00:17:55,920 You put a pin to PIN three as alternate function. 201 00:17:55,920 --> 00:18:02,040 PS and we do this by accessing a register known as the AFAS and you can find this in the data sheet 202 00:18:02,760 --> 00:18:04,200 to run the course quicker. 203 00:18:04,210 --> 00:18:05,820 I'm not going to go back to the data sheet. 204 00:18:05,820 --> 00:18:14,250 I'm just going to bring this here and this over here configures two and three of you 246 and IREX Ordinaire 205 00:18:14,250 --> 00:18:15,060 function seven. 206 00:18:16,080 --> 00:18:18,960 Once we've done this, we've got to set the mood. 207 00:18:19,380 --> 00:18:24,180 We've got to set the mood of the pin to alter the function. 208 00:18:25,140 --> 00:18:34,320 And we do this by accessing the most register and the mode register is written us mode are, as you 209 00:18:34,320 --> 00:18:35,280 can see over here. 210 00:18:36,930 --> 00:18:40,020 So these two lines would configure the mode. 211 00:18:40,740 --> 00:18:47,640 And once that is done, we can start configuring the U.S. We can't forget about rate and then we enable 212 00:18:47,640 --> 00:18:51,360 it and then we will be done with it. 213 00:18:51,510 --> 00:19:00,060 So we start off by accessing the board register and we set about eight to nine thousand six hundred. 214 00:19:00,060 --> 00:19:03,420 And all of that is included in this hexadecimal value here. 215 00:19:03,420 --> 00:19:05,850 We're not going to go through how that is computed. 216 00:19:06,510 --> 00:19:12,600 And once that is done, we're going to enable T, X and our X and set it for eight bits data. 217 00:19:13,620 --> 00:19:17,250 And all of that also is encapsulated in this hexadecimal. 218 00:19:17,280 --> 00:19:20,550 You can simply go to the data sheet and search for this register. 219 00:19:20,550 --> 00:19:27,240 P are the same where we went and search for this and we're able to derive that this is the number we 220 00:19:27,240 --> 00:19:28,080 need to store here. 221 00:19:28,290 --> 00:19:33,150 Everything you see here, if you want to learn more about it, you can go to the data sheet and find 222 00:19:33,420 --> 00:19:34,830 their respective registers. 223 00:19:35,610 --> 00:19:43,530 So this register control register one we set in about an hour and eight put data in it. 224 00:19:43,530 --> 00:19:49,260 And once that's done, we're going to go to control register two and set one. 225 00:19:49,260 --> 00:19:54,360 Stop it by just keeping it in its default state, which is zero zero. 226 00:19:54,370 --> 00:19:56,100 Researcher Was this down? 227 00:19:56,100 --> 00:20:03,000 We go to a controlled register three and say we want no flow control by also keeping it in its default 228 00:20:03,000 --> 00:20:03,420 state. 229 00:20:03,660 --> 00:20:08,880 So we could have actually skipped this, but it's better programming to set it. 230 00:20:08,880 --> 00:20:10,590 Even if the default state is zero. 231 00:20:10,590 --> 00:20:16,440 It's it's good to sort of explicitly state set it back to zero zero zero. 232 00:20:17,010 --> 00:20:23,520 Once we've done all of this, we can enable the the USA module by going back to control register one 233 00:20:23,640 --> 00:20:24,210 like this. 234 00:20:25,860 --> 00:20:26,340 Right. 235 00:20:27,000 --> 00:20:33,100 So once we've done this, we can write a function to help us write a character to the user. 236 00:20:33,540 --> 00:20:34,890 So I'm going to come over here. 237 00:20:36,380 --> 00:20:37,800 I'm going to say int. 238 00:20:42,080 --> 00:20:49,630 You said, too, and then you say, right, and then this function is going to take. 239 00:20:51,930 --> 00:20:55,830 And S.H. as a parameter, and this is going to be what we want to send. 240 00:20:57,670 --> 00:21:03,520 And what we have to do is we have to wait for the transfer buffer to be empty before we can send it, 241 00:21:04,210 --> 00:21:07,020 and we do this by using a while loop. 242 00:21:07,030 --> 00:21:10,870 So we say, well, not. 243 00:21:13,650 --> 00:21:24,750 Used to over here like this and we go to status status register, which is Asare, and then we do end 244 00:21:25,110 --> 00:21:35,270 through X zero zero eight zero while this wait for the transfer buffa to be empty, wants to transfer 245 00:21:35,280 --> 00:21:42,020 barflies empty, then we can send what is currently in the D.R., which is the data register by saying 246 00:21:42,030 --> 00:21:43,140 use it to. 247 00:21:46,090 --> 00:21:48,160 D-R equals 248 00:21:51,760 --> 00:21:55,360 S.H. and zero X. 249 00:21:58,840 --> 00:22:02,180 Like this, right? 250 00:22:02,680 --> 00:22:06,340 OK, so we can, in fact, return S.H. here 251 00:22:09,520 --> 00:22:10,900 just to indicate success. 252 00:22:12,850 --> 00:22:19,210 Once that's done, we can have another function here to help us read what is in the queue at the end 253 00:22:21,520 --> 00:22:24,040 user to underscore read. 254 00:22:27,640 --> 00:22:29,230 And this takes no argument. 255 00:22:32,940 --> 00:22:38,430 And we we want to read what is in the want to read what is in the data register. 256 00:22:38,460 --> 00:22:42,080 But before we do that, we have to make sure there is something in this. 257 00:22:42,100 --> 00:22:47,550 We have to wait until the character arrives and we can use a similar while loop. 258 00:22:47,910 --> 00:22:50,160 I'll copy this while loop, bring it over here. 259 00:22:50,790 --> 00:22:59,610 This time I'm going to pass excerpts or two over here and then we're simply going to return what we 260 00:22:59,610 --> 00:23:09,800 get from the data register by saying return user to D-R like this. 261 00:23:11,310 --> 00:23:11,660 Right. 262 00:23:12,630 --> 00:23:13,890 So they should help us. 263 00:23:15,600 --> 00:23:18,330 Yeah, they should help us read and write. 264 00:23:18,730 --> 00:23:25,500 The next thing we're going to do is we're going to interface the the C library. 265 00:23:25,650 --> 00:23:27,660 I'm going to add DTD. 266 00:23:27,690 --> 00:23:36,990 I ordered H I'll come to our USA dot h file and I'm going to include SDD over here so that we can use 267 00:23:36,990 --> 00:23:37,560 print F. 268 00:23:42,430 --> 00:23:50,770 Standard input output like this, and I'm going to bring a piece of a piece of code that would help 269 00:23:50,770 --> 00:24:01,240 us, that would help us to interface to the standard CIA library, and we're not going to get into this. 270 00:24:02,560 --> 00:24:09,940 So this over here would help us to interface to the library and other function is going to be called 271 00:24:09,940 --> 00:24:11,020 by the sea library. 272 00:24:17,070 --> 00:24:18,390 This last one here. 273 00:24:27,110 --> 00:24:27,470 Right. 274 00:24:27,650 --> 00:24:35,990 So by including this bit here, we should be able to use our normal print F and scanned scan functions 275 00:24:35,990 --> 00:24:37,430 that we use in C language. 276 00:24:37,760 --> 00:24:40,100 And like I said, I'm not going to get into the details of this. 277 00:24:40,640 --> 00:24:46,010 We've already diverted too much from deep lowness, little deep learning as it is. 278 00:24:47,000 --> 00:24:47,900 Um, yeah. 279 00:24:49,760 --> 00:24:52,540 So we can put a bit of test code here. 280 00:24:52,550 --> 00:24:59,900 I'm going to come down here and put a bit of test code that would allow us to test what our what you 281 00:24:59,900 --> 00:25:02,130 what configuration is work. 282 00:25:02,150 --> 00:25:09,560 And we're going to come over here and see FOID test set up. 283 00:25:13,890 --> 00:25:24,510 Open and close, and we can simply see Pranav, as you can see, if in print is appearing now, so we 284 00:25:24,510 --> 00:25:29,460 say, please, perhaps enter a number. 285 00:25:36,350 --> 00:25:41,870 And we come over here and we can use Cunniff to grab the number. 286 00:25:46,520 --> 00:25:52,760 Percentage day, and I'm going to create a variable to hold it. 287 00:25:56,710 --> 00:26:05,110 We've got to come come up here and have intend to hold it, and I'm going to create another buffer here, 288 00:26:05,110 --> 00:26:09,670 which I'll simply call SDR a size 80 like this. 289 00:26:13,590 --> 00:26:20,490 And let's see, let's see, OK, how about we go back to number entered, we can say Pranav. 290 00:26:32,650 --> 00:26:43,310 No, you entered is percentage did you line like this? 291 00:26:45,420 --> 00:26:46,910 Whichever way, right? 292 00:26:47,190 --> 00:26:48,780 And I'm going to pass it over here. 293 00:26:50,970 --> 00:26:56,640 And how about we try a string by saying, please enter a string print of. 294 00:26:59,210 --> 00:26:59,930 Please. 295 00:27:02,690 --> 00:27:04,880 Enter a character string. 296 00:27:10,280 --> 00:27:14,000 And we can grab this drink by using get as. 297 00:27:16,610 --> 00:27:27,870 And we can store it in our character store that we created up up here, and then we can print out the 298 00:27:28,010 --> 00:27:28,490 drink. 299 00:27:33,700 --> 00:27:34,510 The string. 300 00:27:37,690 --> 00:27:45,630 You it this and we can use put string to print out. 301 00:27:48,030 --> 00:27:53,170 Want to print out the content of SDR and we can put a bit of a new line over here. 302 00:27:57,570 --> 00:28:03,510 Right, let's expose this as well so that we can use this in our main function. 303 00:28:08,700 --> 00:28:15,330 And we can still use the printf function in our main F test that I want to put it all together so that 304 00:28:15,330 --> 00:28:16,420 we can test it at once. 305 00:28:16,440 --> 00:28:18,210 That's why I've created a function for it. 306 00:28:18,870 --> 00:28:19,260 Right. 307 00:28:19,560 --> 00:28:24,660 So once this is done, we can go to Maine and test this up when I come to Maine and I'm going to include 308 00:28:24,660 --> 00:28:27,300 the USA Today that we just created. 309 00:28:33,620 --> 00:28:37,590 Include you at this or are you at fault? 310 00:28:38,270 --> 00:28:51,860 And I'm going to come here and it made this void open, close, and we want to initialize the use that 311 00:28:52,520 --> 00:28:53,830 you start to in it. 312 00:28:54,170 --> 00:28:55,960 That's just the name of a function. 313 00:28:57,980 --> 00:28:58,930 It's over here. 314 00:28:59,840 --> 00:29:00,740 You've been close. 315 00:29:01,760 --> 00:29:06,090 And let's see, we don't need a while loop. 316 00:29:06,590 --> 00:29:11,180 Just put it here, over here regardless, OK? 317 00:29:11,550 --> 00:29:15,080 And we can call our function, which is set up test. 318 00:29:17,050 --> 00:29:22,900 Scored the test sets up, right, and have this. 319 00:29:23,110 --> 00:29:28,840 OK, so let's build and see if it's all fine of click to build. 320 00:29:30,940 --> 00:29:33,630 We've got no arrows and no we've got four. 321 00:29:33,670 --> 00:29:37,250 One is I'm going to come here to set up the debugger. 322 00:29:37,270 --> 00:29:39,280 I'm using the stealing debugger. 323 00:29:40,720 --> 00:29:49,690 Select Citilink over here when I click settings over here says no stealing detected. 324 00:29:50,140 --> 00:29:53,350 So I'm going to connect my microcontroller. 325 00:30:00,860 --> 00:30:02,760 I've just connected my microcontroller. 326 00:30:03,500 --> 00:30:09,620 I'm going to come back here again, debug as the debugger searches and a flash download, I'm going 327 00:30:09,620 --> 00:30:16,960 to click over here to run hook and OK, I'm going to click here to download onto the board and to download 328 00:30:16,970 --> 00:30:17,800 it successfully. 329 00:30:17,810 --> 00:30:21,140 I'm going to open our terror term now and see what we have. 330 00:30:24,160 --> 00:30:30,940 This is my territory, I'm going to click on Syria and I'm going to select from three as microelectronics 331 00:30:31,330 --> 00:30:37,560 link and then OK, and I'm going to press the reset button on my microcontroller. 332 00:30:37,720 --> 00:30:46,360 And as you can see, it says, please enter a number just like we wrote when it reset again, please 333 00:30:46,360 --> 00:30:46,680 enter. 334 00:30:46,690 --> 00:30:51,300 No, I'm going to enter 56, the number you entered. 335 00:30:51,310 --> 00:31:00,760 Fifty six, please enter character shrink will come to DL destroying you into this world, come to DL 336 00:31:00,760 --> 00:31:05,230 so it's fine and we can actually test out the print from here. 337 00:31:14,070 --> 00:31:24,780 This is a message from Main Say, right, and I'm going to click here to build. 338 00:31:27,660 --> 00:31:28,350 Or is it? 339 00:31:32,550 --> 00:31:39,870 Click here to build and I'll click here to download onto the board and we can take a look at terrorism 340 00:31:39,870 --> 00:31:40,230 again. 341 00:31:47,870 --> 00:31:54,460 OK, I'm going to select my serial port here and I'm going to press reset on the board. 342 00:31:54,710 --> 00:31:56,910 This is a message from me, right? 343 00:31:57,080 --> 00:32:01,490 So this brings us to the end of this very lesson, and I shall see you in the next lesson. 344 00:32:01,490 --> 00:32:03,300 If you have any questions, just let me know. 345 00:32:03,320 --> 00:32:09,890 Send me your questions in the Q&A section or the Q&A area, I should say. 346 00:32:10,220 --> 00:32:11,090 I'll see you later.