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Hello.

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Welcome back.

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So in this lesson we agreed to write the function to initialize the touch sensor and then we're gonna

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test it out.

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So come over here to write a new function.

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There's going to be a void.

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I call this touch sensor or in it.

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And this is simply going to call the on the touch sense or in its function in a while.

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Both support package.

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So simply say if I access the function in our PSP I'll see if PSP PSP.

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Yeah.

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On the score T S for such say so or touch screen

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and then I'm going to initialize to 40 by 320 which is the size of the LCD screen of course.

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Yes.

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Area.

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I'm gonna see if we are able to initialize it.

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So by executing this line we initialize as well as check for error.

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Right.

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If that's the case we're simply going to print an error message see over here print f

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touch sense of failure.

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I'll go there.

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Like this and we can delay for a bit how delay put 50 over here and I'm going to take this function

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prototype to the top.

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Copy and paste over here put a semicolon here.

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So now we can call this in our main function or come to a main right off to initialize in our control

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panel.

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I'm going to initialize these types say so over here.

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Write Okay so one thing with regards to this.

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This function over here our control panel.

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I changed a color from dark yellow to black.

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This OCD color over here it sets text color used to be dark yellow and when I was taking the video and

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a photo of my microcontroller board that color wasn't clear enough for the camera so I changed it to

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black.

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So in the previous lesson if you saw a dark yellow here and it's black now.

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Yeah that's why it is black.

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Course I changed it.

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Okay so with initialized our touch saying yes or no let's call it you know what.

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Infinite Loop we can call it.

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I'll come over here.

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We have a white infinite loop here I'm going to clean our global variable that we used earlier.

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We use this for testing purposes.

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I'll come over here and then I'm gonna make use of the function in our board support package.

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I'll see BSP touch screen or touch since I'll get state

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and I'm going to I'm going to create I'm going to create an instance of the t s state typedef and pass

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it over here.

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So I'll come over here and say t s on this call state typedef you know simply call this you a state

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I'm gonna pass the address of this to our call down here put an ambush on here to grab the address put

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a semicolon here right.

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So we going to get state and then we can simply grow a circle or we can simply draw us we detect.

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So what I'm going to do is I'm going to still come in here or should I write a new function for this.

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Okay.

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We can keep it here.

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I'm gonna say if you I state you I state got touched detected.

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If touch is detected.

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I'm simply going to draw a circle or border.

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I'll say BSP PSP underscore LCD underscore

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full circle.

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And then I'm going to draw the circle at the position so I'll see you I states dot X and then you isolate

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the Y and then I'm gonna pass size 5 over here like this.

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Okay let's build and see what we have.

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Click over here to build

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it's built successfully or connect my port and download a quick run and then debug over here.

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Okay.

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It's setting up

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okay download complete.

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I'm simply going to turn it off.

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I'll terminate and then press reset on my microcontroller board the block button

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and then I'm gonna test the touchscreen

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I'm simply going to attempt to write something here.

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Um yeah.

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It's work in but it s a bit like in it s not flowing smoothly so we may have to debug somethin.

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You see I'm trying to write to 6 but it s not perfect.

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So the c word the error lies.

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Okay um I suspect the cause of the sluggishness is from this function over here.

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We can comment this out for now we're going to deal with it later and I'm going to add a bit of delay

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down here.

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Once we you know grow the um the picture.

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Where you going to just delete

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delay 1 over here okay.

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No no C from the top or we have to have this the addresses of the LCD.

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Oh this one here is missing a zero as well.

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Okay let's build it see what we have now.

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Click over here to build

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and then click here debug to download onto the port

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it's downloaded

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it's still downloading

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the download should be complete.

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No.

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Okay I'm gonna click here to run

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she can see the LCD screen.

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This is it.

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I'm gonna attempt to draw something.

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No it's smooth.

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I just drew a 6 when I reset to my port right.

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1 reset to my board and then 2.

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In fact I'm gonna use a pointer to do this 6 3

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2 Okay.

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So now it s smooth and working perfectly.

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Um yeah.

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So the button doesn't work.

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Now.

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That's what we're going to do next.

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We're going to isolate the bottom half of the screen from the top where we write so that we can we can

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sort of press the reset button and have the screen you know erased.

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So that's what we'll do next.

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I'm going to exit that burger from over here

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right.

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So like I said we are going to separate the Boston area of the of this crane from the part where we

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draw.

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I'm gonna use a simple if statement over here I'm going to see if and I'll see you.

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I do it okay.

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It's called.

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You state you I state that if you I state DOT x is greater than

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the draw.

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I m g we have we have a symbolic name that we call draw.

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I m g X1 to draw.

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I m g X1 if it s greater than this.

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And you I state that X is less than X to just complete this

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if it is less than x 2.

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And we've got a check for y as well.

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And

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and I'll simply say you I Stage 1 Stage Two y

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s greater than y one

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and less than y.

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Why you like this.

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Why not put brackets here.

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Yes you are.

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We have you I state X if you have state X is greater than X one and less than X 2 and it's greater than

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any other state.

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Y is in the way I see it.

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Why is greater than why one does sprockets should come up here

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and your state.

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Why is greater than why one and I state why is less than Why two.

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If that's the case then we uh.

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In the um we're in the growing area.

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So in the groin area we simply perform our groin which we have over here feel.

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Circle

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ls we've got up put on else for the Portland area so I'll come over here and see who else

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if you I state got x

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is greater than you raise button cos we have a symbolic name known as erase button X as well say erase

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button on the score x 1

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and you y.

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State X

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is less than a race button x 2

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Just fudge this

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and then we do the same for y and you y state Y

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is created than erase button y 1

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and you I state that y s s done erase button y 2

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if that's the case then we kinda erase zone see why do we have

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a problem.

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I'm simply going to open and close over here so let's check it you I state X is created on x 1 and US

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states X is less than X 2 Over here it should be.

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And then you y states Y is created and Y 1 and you y states Y is less than y 2.

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If this is the case we are going to reset the game or cloud a UI and now we cleared a UI by taking it

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to its default state which is control panel set over here.

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Already have this we've created this function already

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so I'll just paste this over here.

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Now let's build and see what we have.

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Click over here to build

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okay and then I'm going to click over here to run by clicking on debug it s finished the book and I'm

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going to click here to run and um.

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Let's see.

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Ron my board is frozen.

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So I've got a text my board and put it back into the computer.

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Sometimes I get this for the touch screen.

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So here we go.

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I've reset my port as you can see it looks the same.

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Now I'm gonna write six and then I'm gonna press erase it s clean.

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I'm gonna use a pointer to write a right to then I'll click you one raise three.

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You rage just like that.

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So the race button works.

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Okay then right.

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So in the next lesson what are we going to do is we going to take whatever we write over here in a large

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area and shrink it to a twenty eight by twenty eight size.