1 00:00:00,880 --> 00:00:03,590 Before we go on we need to complete this. 2 00:00:03,610 --> 00:00:06,160 We left this because we hadn't written this function. 3 00:00:06,160 --> 00:00:07,630 I'm going to bring this function here 4 00:00:13,490 --> 00:00:17,960 and I wouldn't put the function prototype here. 5 00:00:18,460 --> 00:00:26,070 We are going to have another function called SD 7 7 3 5 in it and this would combine this function it 6 00:00:26,260 --> 00:00:33,170 would combine the SS I in its function which says in things such as set in the background color when 7 00:00:33,170 --> 00:00:36,770 the LCD starts for the first time and other things. 8 00:00:36,830 --> 00:00:48,860 So I'm going to come down here and I'm going to see void SD 7 7 3 5 and a score in it. 9 00:00:50,840 --> 00:00:55,160 And then this function I'm going to call SSI in this here 10 00:01:06,150 --> 00:01:13,980 and I'm going to set the cursor to 0 0 0 so the LCD cursor to the start position if not written this 11 00:01:13,980 --> 00:01:16,500 function yet but will write it next. 12 00:01:16,890 --> 00:01:23,370 So you need not worry about that and I'm going to set the text color to yellow when the LCD starts for 13 00:01:23,370 --> 00:01:28,390 the first time and then I'm going to set the background color to black. 14 00:01:28,620 --> 00:01:32,510 Well we would have a function for full screen as well right. 15 00:01:32,550 --> 00:01:36,090 So this is going to be how we initialize the LCD. 16 00:01:36,090 --> 00:01:39,260 This function here takes care of the hardware initialization. 17 00:01:39,280 --> 00:01:47,100 This is just to setup the screen parameters such as the cursor position and Texaco lined background 18 00:01:47,100 --> 00:01:47,650 color. 19 00:01:47,760 --> 00:01:48,370 Right. 20 00:01:48,400 --> 00:01:53,800 So I'm going to bring the function for four sets in the cursor. 21 00:01:54,330 --> 00:01:56,170 So it's a simple function. 22 00:01:56,520 --> 00:02:06,620 It takes the x position and the y position a simple cluster right. 23 00:02:08,140 --> 00:02:13,090 Actually let's go to the DOT each file and include the prototype of all the functions we're going to 24 00:02:13,180 --> 00:02:22,370 add to this function here is going to be required outside the s t 7 7 3 5 dot c file. 25 00:02:22,380 --> 00:02:27,840 Because of that we've got to put its prototype in a dot each file so that we can access it from the 26 00:02:28,140 --> 00:02:35,900 main dot c file and I'm going to bring the prototypes of all the functions we require here 27 00:02:40,920 --> 00:02:42,320 to all of these functions. 28 00:02:42,390 --> 00:02:48,250 We are going to include in our dot c file and we'll be able to access them in our main file. 29 00:02:48,390 --> 00:02:49,560 You see set cursor. 30 00:02:49,650 --> 00:02:50,650 The one we just wrote. 31 00:02:50,650 --> 00:02:52,130 It's already here. 32 00:02:52,320 --> 00:02:53,260 Right. 33 00:02:53,310 --> 00:02:54,880 So the error disappeared. 34 00:02:54,960 --> 00:02:56,770 It takes two argument. 35 00:02:56,910 --> 00:03:03,410 The first one is the new exposition the second one is the new y position. 36 00:03:03,410 --> 00:03:10,080 Once that is done we're going to have a function for Phil rect to fill a rectangle with a color. 37 00:03:10,660 --> 00:03:11,600 Right. 38 00:03:11,600 --> 00:03:16,490 And we're going to have another function for set an address set address window 39 00:03:20,160 --> 00:03:25,460 but we're going to have one to fulfill the screen feel of the screen 40 00:03:32,140 --> 00:03:35,500 then there's the function for sets sets an address window 41 00:03:40,590 --> 00:03:41,580 once that's done. 42 00:03:41,580 --> 00:03:43,680 We're going to have another function for push color 43 00:03:49,390 --> 00:03:51,790 function for draw pixel 44 00:03:57,640 --> 00:04:02,740 function for drawing a third line call this one crawl vertical line first 45 00:04:05,710 --> 00:04:08,110 function for growing horizontal lines 46 00:04:12,390 --> 00:04:13,860 function to draw a bitmap 47 00:04:19,520 --> 00:04:25,480 and you need not follow I'm going to upload the project to the video so you can download it and just 48 00:04:26,110 --> 00:04:34,600 yeah just use it after draw bitmap green chose the function for drawing character string 49 00:04:52,670 --> 00:04:54,610 a function for drawing characters 50 00:05:08,460 --> 00:05:09,780 function to search color 51 00:05:16,670 --> 00:05:20,890 a function for Claire in the plot when we plot something we would want to clear it 52 00:05:29,400 --> 00:05:31,470 a function for having a simple plot 53 00:05:37,380 --> 00:05:43,880 function for plotting a point so let's say you read a value from the ATC you want to plot that points 54 00:05:44,830 --> 00:05:47,220 and then a function for going to the next position. 55 00:05:47,240 --> 00:05:53,030 After you've plotted a point in order to have a complete graph you've got a move to the next position 56 00:05:53,030 --> 00:05:55,930 plot and then move to the next position plot. 57 00:05:56,210 --> 00:06:00,410 And because of that we're going to have a function for plot increment 58 00:06:10,750 --> 00:06:12,170 this function. 59 00:06:12,620 --> 00:06:20,390 Make sure when we reach the end of the day the time when we reach the end of the x axis we return back 60 00:06:20,390 --> 00:06:21,670 to zero. 61 00:06:22,220 --> 00:06:28,290 Right it's basically rich and the end of this screen and starting from the beginning. 62 00:06:29,230 --> 00:06:31,110 Went over function for plot in line 63 00:06:39,010 --> 00:06:40,480 function for plot bar 64 00:06:45,310 --> 00:06:47,010 function to plot the next point. 65 00:06:47,020 --> 00:06:51,430 That's the one I was talking about that when you plots the first point you've got to move and plot the 66 00:06:51,430 --> 00:06:58,040 next point and then we're going to put a number of the functions we've written together. 67 00:06:58,040 --> 00:07:05,450 We're going to put a number of the functions we've written together to plot axes so the plot the axes 68 00:07:05,480 --> 00:07:11,750 will need to use the draw horizontal line and then to draw vertical line as well as fill a rectangle 69 00:07:11,750 --> 00:07:17,660 for the background color and other things we're going to put all of this together into one function 70 00:07:17,690 --> 00:07:19,790 so that we can simply call this function. 71 00:07:19,790 --> 00:07:25,010 Draw axes and half the axes drawn this function. 72 00:07:25,010 --> 00:07:25,680 Right. 73 00:07:25,700 --> 00:07:28,820 So you can spend some time trying to understand these functions. 74 00:07:28,820 --> 00:07:35,140 They're very simple C code they've got nothing to do with you know bare metal or microcontroller design. 75 00:07:35,150 --> 00:07:39,530 These are simple zip codes for displaying graphics. 76 00:07:39,530 --> 00:07:43,190 So if you have any questions regarding them you can send me a message as well. 77 00:07:43,470 --> 00:07:46,730 So here are the functions we have one error somewhere 78 00:07:51,160 --> 00:07:52,990 is the set address window. 79 00:07:52,990 --> 00:07:59,430 This is because the code is not reachable and we've got to put its prototype here 80 00:08:07,140 --> 00:08:11,630 right okay we're looking good so far. 81 00:08:12,020 --> 00:08:19,310 So the next thing that we're going to do is this initialize an ADC so to make this a bit more interest 82 00:08:19,310 --> 00:08:25,190 and we're going to initialize one of the ADT pairs connect to a potential meter to the microcontroller 83 00:08:25,550 --> 00:08:33,020 and plot the data as we move the potential meter to see that it works and to give you an idea of how 84 00:08:33,080 --> 00:08:36,140 this could work in the real world in the same way. 85 00:08:36,410 --> 00:08:42,800 You can make it more interesting by plotting the data from the temperature sensor in that microcontroller 86 00:08:42,830 --> 00:08:43,610 on the graph. 87 00:08:43,610 --> 00:08:48,520 After I've shown you how to plot the ATC data so that's what we're going to do now.