TFTEtchASketch

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1#include <SPI.h>
2#include <TFT.h>

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1#define cs   10
2#define dc   9
3#define rst  8
4
5TFT TFTscreen = TFT(cs, dc, rst);

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1int xPos = LCDscreen.width()/2;
2int yPos = LCDscreen.height()/2;
3
4int erasePin = 2;

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1void setup() {
2
3  pinMode(erasePin, INPUT);
4
5  TFTscreen.begin();
6
7  TFTscreen.background(0,0,0);
8}

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1void loop()
2{
3
4  int xValue = analogRead(A0);
5
6  int yValue = analogRead(A1);
7
8  xPos = xPos + (map(xValue, 0, 1023, 2, -2));
9
10  yPos = yPos + (map(yValue, 0, 1023, -2, 2));

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1if(xPos > 159){
2
3    (xPos = 159);
4
5  }
6
7  if(xPos < 0){
8
9    (xPos = 0);
10
11  }
12
13  if(yPos > 127){
14
15    (yPos = 127);
16
17  }
18
19  if(yPos < 0){
20
21    (yPos = 0);
22
23  }
24
25  TFTscreen.stroke(255,255,255);
26
27  TFTscreen.point(xPos,yPos);

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1if(digitalRead(erasePin) == HIGH){
2
3    TFTscreen.background(0,0,0);
4
5  }
6
7  delay(33);
8}

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1/*
2
3 TFT EtchASketch
4
5 This example for the Arduino screen draws a white point
6
7 on the GLCD based on the values of 2 potentiometers.
8
9 To clear the screen, press a button attached to pin 2.
10
11 This example code is in the public domain.
12
13 Created 15 April 2013 by Scott Fitzgerald
14
15 http://www.arduino.cc/en/Tutorial/TFTEtchASketch
16
17 */
18
19#include <TFT.h>  // Arduino LCD library
20#include <SPI.h>
21
22// pin definition for the Uno
23#define cs   10
24#define dc   9
25#define rst  8
26
27// pin definition for the Leonardo
28// #define cs   7
29// #define dc   0
30// #define rst  1
31
32TFT TFTscreen = TFT(cs, dc, rst);
33
34// initial position of the cursor
35int xPos = TFTscreen.width() / 2;
36int yPos = TFTscreen.height() / 2;
37
38// pin the erase switch is connected to
39int erasePin = 2;
40
41void setup() {
42
43  // declare inputs
44
45  pinMode(erasePin, INPUT);
46
47  // initialize the screen
48
49  TFTscreen.begin();
50
51  // make the background black
52
53  TFTscreen.background(0, 0, 0);
54}
55
56void loop() {
57
58  // read the potentiometers on A0 and A1
59
60  int xValue = analogRead(A0);
61
62  int yValue = analogRead(A1);
63
64  // map the values and update the position
65
66  xPos = xPos + (map(xValue, 0, 1023, 2, -2));
67
68  yPos = yPos + (map(yValue, 0, 1023, -2, 2));
69
70  // don't let the point go past the screen edges
71
72  if (xPos > 159) {
73
74    (xPos = 159);
75
76  }
77
78  if (xPos < 0) {
79
80    (xPos = 0);
81
82  }
83
84  if (yPos > 127) {
85
86    (yPos = 127);
87
88  }
89
90  if (yPos < 0) {
91
92    (yPos = 0);
93
94  }
95
96  // draw the point
97
98  TFTscreen.stroke(255, 255, 255);
99
100  TFTscreen.point(xPos, yPos);
101
102  // read the value of the pin, and erase the screen if pressed
103
104  if (digitalRead(erasePin) == HIGH) {
105
106    TFTscreen.background(0, 0, 0);
107
108  }
109
110  delay(33);
111}