1 00:00:00,720 --> 00:00:05,940 Hi and welcome to a new section in this course, this section is dedicated to this place. 2 00:00:05,970 --> 00:00:14,130 I'm going to show you how to use a series of displays such as this to buy 16 LCD display. 3 00:00:14,370 --> 00:00:15,150 Very common. 4 00:00:15,490 --> 00:00:17,850 I've got a graphics display like these, actually. 5 00:00:17,860 --> 00:00:26,670 I've got a variety of graphics displays to show you, plus displays such as this eight by eight Matrix 6 00:00:26,670 --> 00:00:27,300 and so on. 7 00:00:27,780 --> 00:00:34,020 So in this first lecture and the one that follows, I'm going to show you how to use the very common 8 00:00:34,320 --> 00:00:44,580 two by 16 LCD display, which contains a backpack like this one, which allows us to use it in cereal 9 00:00:44,580 --> 00:00:50,940 ICQ, which see mode instead of its native parallel mode via those pins here. 10 00:00:51,600 --> 00:00:59,010 So in my case, I have sold the backpack onto the display itself, and that makes it easier to use in 11 00:00:59,010 --> 00:01:02,160 one piece as if there is one single module. 12 00:01:02,700 --> 00:01:11,100 Now this module here just said contains the F eight five seven four integrated circuit, which makes 13 00:01:11,100 --> 00:01:20,010 it possible to convert the displays native parallel interface into in a square C interface. 14 00:01:20,520 --> 00:01:29,000 So I've got the wiring here set up and in this lecture I'm going to show you how to use the USB 32 hardware 15 00:01:29,010 --> 00:01:36,060 I see in the face and in the next lecture will do the same thing, but will use a software interface 16 00:01:36,060 --> 00:01:46,170 which allows us to use squishier with any compatible chips on the 32 instead of being confined to the 17 00:01:46,170 --> 00:01:46,870 hardware. 18 00:01:47,040 --> 00:01:48,030 I could see. 19 00:01:50,370 --> 00:01:56,670 So the wiring in this first example is very simple for ground. 20 00:01:58,160 --> 00:02:05,330 And this is see, I'm using the ground pens on the ground rail on my breadboard, and I'm using the 21 00:02:05,330 --> 00:02:15,020 five volt pin on the speaker to say I'm just using this long red wire to take five votes into the FCC 22 00:02:15,050 --> 00:02:22,210 on the backpack for state and SEAL because I'm using the E.S.P 32 hardware. 23 00:02:22,250 --> 00:02:25,910 I could see this, too, had I switched to interfaces. 24 00:02:25,910 --> 00:02:28,360 I'm using the one with ID zero. 25 00:02:28,370 --> 00:02:30,800 I'm going to talk a little bit more about this in a moment. 26 00:02:31,160 --> 00:02:39,530 I'm using pins 19 for a.D.A and 18 for a ACL. 27 00:02:41,860 --> 00:02:52,270 All right, now let's have a look at the software side, so the software side depends on two libraries 28 00:02:52,270 --> 00:02:53,110 that you need to download. 29 00:02:53,110 --> 00:03:02,500 The first one is this one here, LCD on this call API P y, which contains some of the basics of the 30 00:03:02,500 --> 00:03:04,620 functionality for the LCD display. 31 00:03:05,230 --> 00:03:14,200 And then on top of that, we use the SBA to six six call I squared see on this LCD, which basically 32 00:03:14,200 --> 00:03:20,980 builds top of the OCD and this score API with functionality that is specifically compatible with the 33 00:03:20,980 --> 00:03:22,600 SBA eight to six six. 34 00:03:22,600 --> 00:03:26,040 And it's an extension with our E.S.P 32. 35 00:03:26,770 --> 00:03:29,920 So you need to get those libraries. 36 00:03:29,920 --> 00:03:35,360 And I have the locations from where you can download them from here. 37 00:03:36,250 --> 00:03:42,040 So these are the required modules that you need to download and install. 38 00:03:43,620 --> 00:03:48,290 Apart from that, I'm using a few other bits and pieces here, for example, you need to import the 39 00:03:48,330 --> 00:03:57,090 pins module and sleep, put a bit of delay their motor using the string formatter or the string formatting 40 00:03:57,090 --> 00:04:02,820 operator, the percentage string, as you can see, percentage the string here to allow me to display 41 00:04:03,300 --> 00:04:04,110 this number. 42 00:04:04,120 --> 00:04:06,150 And it's increasing every second. 43 00:04:06,510 --> 00:04:10,010 So I use the string formatter for that. 44 00:04:10,020 --> 00:04:16,080 If you're not familiar with how to use it and have a look at this reference documentation. 45 00:04:17,130 --> 00:04:22,200 Let's talk a little bit about Isaac we see on the especially to using micro python. 46 00:04:22,560 --> 00:04:28,770 We've got a link for that here, specifically for the hardware interface that we are using. 47 00:04:29,400 --> 00:04:32,490 This example, it would take you to this page here. 48 00:04:32,790 --> 00:04:39,240 We are now looking at a quick reference for the E.S.P 32 in the macro Python website, and that is the 49 00:04:39,240 --> 00:04:41,100 hardware squid seabass. 50 00:04:41,700 --> 00:04:47,460 And you can see that the is 32 gives us two lots of atheel. 51 00:04:47,510 --> 00:04:51,240 Is the HP use that implement the hardware I could see. 52 00:04:51,600 --> 00:05:00,740 And in this example we are using I d zero, which means that the seal is on Jhpiego 18 and is the Orangeville 53 00:05:00,750 --> 00:05:01,440 98. 54 00:05:01,920 --> 00:05:09,870 And to create an ice quazi object on the hardware, I would say interface or you've got to do is to 55 00:05:09,870 --> 00:05:14,180 tell Macra Python which ID it is that you want to use. 56 00:05:14,180 --> 00:05:15,240 So that's all there is to it. 57 00:05:15,750 --> 00:05:23,970 There's a single no single Idei as a parameter to the ice quartzite constructor will give us the ice 58 00:05:23,970 --> 00:05:26,850 quazi object and that's what we do. 59 00:05:29,160 --> 00:05:29,810 Right here. 60 00:05:31,560 --> 00:05:37,860 After that, we take that Asgard, it's to see object becomes the first parameter in the constructor 61 00:05:37,860 --> 00:05:41,720 for the LCD object in case it LCD. 62 00:05:42,690 --> 00:05:49,290 The name that I've given to the module, you can see I'm importing the ISP a 266. 63 00:05:49,290 --> 00:05:57,000 And this call I to see an LCD and I'm renaming it to this, which is a little shorter and easier to 64 00:05:57,000 --> 00:05:58,470 use on words. 65 00:05:58,470 --> 00:06:01,530 I'm using that as the name of the module. 66 00:06:01,890 --> 00:06:09,690 I'm calling the constructor for the LCD, passing the object for the ice quazi that we created in line 67 00:06:09,690 --> 00:06:13,410 for the two and also grabbing the default. 68 00:06:13,560 --> 00:06:15,180 I could see a address. 69 00:06:15,540 --> 00:06:22,500 I could have created a local variable with her address and just use this in here. 70 00:06:23,900 --> 00:06:26,660 But I was taking a look at the. 71 00:06:28,760 --> 00:06:35,150 Librarian, you can see that that address is already included in the in the library module. 72 00:06:35,600 --> 00:06:43,370 So I was just able to get this constant and edit into my constructor like that. 73 00:06:44,750 --> 00:06:48,470 And that meant that I didn't really need to have an additional line of code here. 74 00:06:49,760 --> 00:06:51,120 I'll keep it here just for reference. 75 00:06:51,130 --> 00:06:56,900 So after that, we've got the number of rose in the third parameter. 76 00:06:56,900 --> 00:06:59,960 In the fourth parameter is the number of columns. 77 00:07:00,290 --> 00:07:08,990 So if you have a different sized LCD display, then you can just change those numbers to match the size 78 00:07:08,990 --> 00:07:10,210 of your particular box. 79 00:07:10,220 --> 00:07:13,100 Could see this could have, for example, three rows. 80 00:07:14,450 --> 00:07:19,780 Once we're done with that, we've got the object to go and clear everything in the display. 81 00:07:19,790 --> 00:07:27,180 So prepare the display to write something on it, clearing the and creating the counter variable here 82 00:07:27,180 --> 00:07:31,060 and giving it an initial value zero and will go into an infinite loop. 83 00:07:31,880 --> 00:07:35,790 I can set the cursor on the Ill-suited to a particular location. 84 00:07:35,810 --> 00:07:40,220 So this is a move to function, which you can see here. 85 00:07:43,340 --> 00:07:48,440 OK, so starting this won't you, to API look through it in here. 86 00:07:49,610 --> 00:07:50,110 All right. 87 00:07:50,110 --> 00:07:51,170 So here it is. 88 00:07:51,770 --> 00:07:58,430 So you can see that first goes the X coordinate and then the Y coordinate in the move to function. 89 00:07:59,720 --> 00:08:01,720 So you've got X Y zero zero. 90 00:08:01,730 --> 00:08:05,240 So it will go up to the very first block. 91 00:08:05,480 --> 00:08:07,070 Can barely see it, but there's a block. 92 00:08:07,070 --> 00:08:07,310 Right. 93 00:08:07,340 --> 00:08:17,590 And then number two and will use they've put is the function to print out this text, this string of 94 00:08:17,600 --> 00:08:20,660 text then will move to the next line down. 95 00:08:20,660 --> 00:08:31,430 So X is zero and then Y one shot will go down here and print out this string of counter followed by 96 00:08:31,850 --> 00:08:40,310 Percentage De, which is the string modifier for a digit, they say percentage sign here. 97 00:08:40,310 --> 00:08:46,760 And then in parentheses I'm printing out the variable value counter, which I have just updated by one 98 00:08:46,760 --> 00:08:53,390 each time we're going through the loop and we'll wait for one second if you sleep one, which I then 99 00:08:53,390 --> 00:08:55,760 put it up here, it takes Sinisa. 100 00:08:55,760 --> 00:09:00,080 Now, given the number of seconds that I want, you wait here and it goes back and repeats the loop 101 00:09:01,370 --> 00:09:02,780 and that's about it that you can see. 102 00:09:02,780 --> 00:09:11,540 It's fairly easy to use your LCD display using the square to see hardware interface to print changing 103 00:09:11,540 --> 00:09:13,130 text or static text. 104 00:09:13,790 --> 00:09:21,080 Let's jump into the next lecture where I'll show you how to use the software I took with C capability 105 00:09:21,080 --> 00:09:27,520 that comes with macro python, which is useful if you just don't have access to the hardware which could 106 00:09:27,530 --> 00:09:28,710 see interface for some.