1 00:00:01,900 --> 00:00:02,360 Hello. 2 00:00:02,410 --> 00:00:03,250 Welcome back. 3 00:00:03,250 --> 00:00:10,650 So in this section we're going to look at how to generate standard general purpose input output firmware 4 00:00:10,660 --> 00:00:15,090 code using the SDM that's to cube emacs in this very first lesson. 5 00:00:15,100 --> 00:00:19,790 We're going to generate code to give us a simple input output effect. 6 00:00:19,810 --> 00:00:26,140 We're going to initialize an input pin and then an output pin and then you're going to see how easy 7 00:00:26,170 --> 00:00:29,200 and how very straightforward it is. 8 00:00:29,200 --> 00:00:32,750 Before we do that let's take our particular board. 9 00:00:32,770 --> 00:00:35,460 I'm using the SDM 32 F4 disco board. 10 00:00:35,470 --> 00:00:42,140 So what I want is I want to take a look at the user guide and see where my my user button is connected. 11 00:00:42,250 --> 00:00:46,380 My Disco Ball comes with one use a button and for ladies. 12 00:00:46,390 --> 00:00:49,470 So I want to know which particular GPA your pins. 13 00:00:49,510 --> 00:00:55,510 These are connected so I can just generate that initiation code for such pins. 14 00:00:55,570 --> 00:01:00,350 To do that I'm just going to search the name of my disco board. 15 00:01:00,580 --> 00:01:02,320 I'm going to search it on Google. 16 00:01:02,590 --> 00:01:05,740 So you search this on Google the name of your board. 17 00:01:05,980 --> 00:01:11,950 Plus the word user manual and you find a link to the PDA file and then once you do that you can just 18 00:01:11,950 --> 00:01:14,370 scroll down to this schematic diagram. 19 00:01:14,410 --> 00:01:27,340 I'm just going to come down here and I should see a schematic somewhere yes OK I just assume in and 20 00:01:27,400 --> 00:01:36,940 as we can see over here my L.D. I've got my got my green LG connected to PD twelve my orange connected 21 00:01:36,940 --> 00:01:41,620 to PD 13 the red to 14 and the blue to 15. 22 00:01:41,640 --> 00:01:44,440 So I know these are the LCD pins. 23 00:01:44,500 --> 00:01:48,520 Next let's see where my use a button is connected. 24 00:01:48,640 --> 00:01:49,650 Let's see. 25 00:01:49,720 --> 00:01:54,310 So here it is says user in Wake Up button so we can use. 26 00:01:54,310 --> 00:01:59,670 They use a button as a wake up button as well and it's connected to a zero. 27 00:01:59,680 --> 00:02:07,780 So what we want is to go to Cuba next and enable P is you as a digital input and then enable one LCD 28 00:02:07,800 --> 00:02:08,870 over here. 29 00:02:08,890 --> 00:02:14,780 How about we use the orange which is which is PD 13 as a digital output. 30 00:02:14,800 --> 00:02:16,510 And then we just generate code for that. 31 00:02:16,540 --> 00:02:22,210 So let's head to Cuba Amex and demonstrate the I've just opened my Cuban Amex from here and I'm going 32 00:02:22,210 --> 00:02:24,920 to create a new project. 33 00:02:24,940 --> 00:02:27,950 And of course you will bring me here. 34 00:02:28,060 --> 00:02:35,470 And what I want is to select my board our youth sports selector over here and I want a discovery board 35 00:02:35,630 --> 00:02:44,230 so that discovery over here my MCU is the SDM 32 F for MCU and the particular microcontroller version 36 00:02:44,230 --> 00:02:54,080 is the 4 1 1 e so select this and then I'll double click and I'll just expand here like this and it 37 00:02:54,080 --> 00:02:54,990 gives the pin out. 38 00:02:55,010 --> 00:02:55,820 Yes. 39 00:02:55,820 --> 00:02:59,850 So first step what we want to do is to disable the forward to pin out. 40 00:02:59,870 --> 00:03:02,460 It's provided us so I'll come over here. 41 00:03:02,600 --> 00:03:08,340 Pin out like this and it would ask me and then I'll confirm by clicking yes. 42 00:03:08,510 --> 00:03:16,220 Once that is done we said why are our button is connected to a zero and we want to use the orange LCD 43 00:03:16,250 --> 00:03:24,360 which is connected to PD 13 so I can just come over here click this and then set it aside GPI outputs 44 00:03:24,420 --> 00:03:27,850 like this and p zero. 45 00:03:27,900 --> 00:03:35,890 Whereas PSU we can search PSU here p zero and here it is I can click this and set it to a cheap I O 46 00:03:35,950 --> 00:03:44,890 inputs and I can rename this label like we learned by right click and enter and I just call this orange 47 00:03:47,190 --> 00:03:56,230 and I call rename this also by right clicking and to use a label and I'll call it button like this. 48 00:03:56,980 --> 00:04:03,670 So once this is done we want to come to clock configuration and we can keep the default system clock 49 00:04:03,700 --> 00:04:07,030 which is ninety six megahertz that's good. 50 00:04:07,030 --> 00:04:15,730 And actually we have to set the debugger we have to set this as y s the system settings we have to choose 51 00:04:16,210 --> 00:04:23,150 otherwise we wouldn't be able to program our microcontroller board and so I'm going to choose the serial 52 00:04:23,150 --> 00:04:28,670 wire that's what the disco board comes with our select 0 wire here and of course in the data sheet we 53 00:04:28,670 --> 00:04:33,880 realize the p A's euro can be used as a use a button or as a wake up button. 54 00:04:34,190 --> 00:04:39,920 So because we use it as a use a button we've caught a red market indicate and there is a conflict we 55 00:04:39,920 --> 00:04:45,380 cannot use it as a wake up button but we do not need a wake up button anyway so that is fine. 56 00:04:45,380 --> 00:04:51,890 So I just come to configuration and we don't need to configure anything for this project and I'll come 57 00:04:51,890 --> 00:05:00,620 to generation I'll click over her project folder choose this folder and project name or call it input 58 00:05:00,680 --> 00:05:15,410 output imposed on the school output and coach generation on leave all of this the same and I select 59 00:05:15,410 --> 00:05:18,790 my my to change which is the. 60 00:05:18,860 --> 00:05:24,920 The five I select this and once that is done I just click okay to generate the code 61 00:05:27,680 --> 00:05:34,170 and I just open the project open the project straight up and later on I can come in. 62 00:05:34,170 --> 00:05:38,600 Click here to generate a report for my or my particular project. 63 00:05:38,610 --> 00:05:41,160 So let's see it's generated. 64 00:05:41,160 --> 00:05:51,440 We can open here to inspect the main file and here we are it's generated although we need it's initialize 65 00:05:51,440 --> 00:05:59,120 the GPL use and we can expected by double click and right click go to definition and before we get everything 66 00:05:59,120 --> 00:06:01,430 to link up we have to reduce the project. 67 00:06:01,490 --> 00:06:02,810 So I'll just rebuilt this 68 00:06:06,860 --> 00:06:12,840 and it's finished rebuild and now I can right click and go to definition and let's see how it's initialized. 69 00:06:12,860 --> 00:06:14,540 It's initialized GPA you a. 70 00:06:14,540 --> 00:06:16,970 This is where our pattern is connected. 71 00:06:16,970 --> 00:06:24,230 It's initialized GPA D as well where our lady is connected and this the initialization sequence. 72 00:06:24,230 --> 00:06:30,620 Those of you familiar with program in the SDM 32 hardware abstraction layer this looks very familiar 73 00:06:30,620 --> 00:06:31,650 to you. 74 00:06:31,940 --> 00:06:38,870 So the label we gave it's orange it's it's said the label name here us orange pin and the other label 75 00:06:38,870 --> 00:06:42,170 we give the button nice button is said to her as a button pin. 76 00:06:42,170 --> 00:06:47,100 So without much ado I would just go ahead and beating around the bush. 77 00:06:47,120 --> 00:06:49,210 Let's just demonstrate. 78 00:06:49,460 --> 00:06:56,700 So what we want is to read the button and then write the value of the button to the LCD. 79 00:06:57,360 --> 00:07:00,340 What I'm going to do is I'm going to go inside my main file. 80 00:07:00,350 --> 00:07:07,130 My main function to do this of course initialization here and what I want is if I'm not very familiar 81 00:07:07,130 --> 00:07:12,530 with the API is to use at this stage I can always click functions over here and select the particular 82 00:07:12,530 --> 00:07:15,940 module I'm looking for which is the key API module. 83 00:07:16,370 --> 00:07:21,770 And once I click here it gives me the list of functions and that's the function I want I want the whole 84 00:07:21,800 --> 00:07:23,920 GPI or read pin. 85 00:07:23,930 --> 00:07:25,670 This will allow me to read a pen. 86 00:07:25,790 --> 00:07:30,860 So if I want to see more about this I can double click this function and then it tells me about this 87 00:07:30,860 --> 00:07:31,310 function. 88 00:07:31,310 --> 00:07:35,930 This function takes two arguments the port and then the PIN number. 89 00:07:35,930 --> 00:07:42,750 So in fact if I don't want to type it all I can just copy this function over here and come to Main and 90 00:07:42,810 --> 00:07:47,980 then paste it and the pin I want to read is and GPI you GPI. 91 00:07:48,010 --> 00:07:49,130 Okay. 92 00:07:49,510 --> 00:08:03,610 And it pins zero P I O pin zero like this so I can read this and this and this function returns a parameter 93 00:08:03,680 --> 00:08:06,760 returns the port pin value the value of the pin. 94 00:08:06,820 --> 00:08:14,710 So it's returns it as 0 or 1 0 means the penis or President 1 means it is pressed so I could just come 95 00:08:14,710 --> 00:08:19,360 here and say declare new variable here. 96 00:08:19,400 --> 00:08:33,810 You in 32 button status in 32 underscore t you in third to underscore t button status and I could I 97 00:08:33,810 --> 00:08:37,800 can come down here and see a button status a course this 98 00:08:42,420 --> 00:08:51,540 and what I want is I can just write the value of button status to the to the LCD I could just come here 99 00:08:51,690 --> 00:09:02,580 and see how GPI your right pin all on the school GPA you score right Ben and this one also takes the 100 00:09:02,580 --> 00:09:11,730 port's name GPA D and then a pin number GPA I could just say orange pin because of the label we used 101 00:09:12,750 --> 00:09:21,480 Yeah we could have used button pin and then I can just see buttons state status like this just to demonstrate 102 00:09:22,040 --> 00:09:28,620 I I'll just call this button pin here like this and you can see the useful ness of the label here. 103 00:09:28,640 --> 00:09:29,750 So now it's all set. 104 00:09:29,750 --> 00:09:36,460 Well we have to do this with Dillard and then download onto our board and I'll just rebuild from her 105 00:09:38,270 --> 00:09:45,080 and we can verify the box settings here as you can see debugger is the SD link debugger using the serial 106 00:09:45,080 --> 00:09:48,470 wire and we can verify that from her. 107 00:09:48,500 --> 00:09:53,510 I just want to reset and run so I don't need to press the reset button to see the changes take effect 108 00:09:53,540 --> 00:10:01,430 so I'll take this over here and click okay and click okay and I reviewed my project and then I download 109 00:10:01,430 --> 00:10:08,630 onto my board and it's finished downloading it's running now and I can see as I press the button the 110 00:10:08,650 --> 00:10:10,180 light turns on. 111 00:10:10,180 --> 00:10:16,870 So this is very simple in fact if you've never program an SDM 32 board before just by using the Cuban 112 00:10:16,870 --> 00:10:22,030 mix you can get this to work in less than two minutes basically. 113 00:10:22,120 --> 00:10:27,660 So let's move on and see the other application I'll see in the next lesson.