EsploraTFTGraph

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

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1int xPos = 0;
2
3void setup(){
4
5  EsploraTFT.begin();
6
7  EsploraTFT.background(250,16,200);
8}

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1void loop(){
2
3  int sensor = Esplora.readLightSensor();
4
5  int graphHeight = map(sensor,0,1023,0,EsploraTFT.height());

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1EsploraTFT.stroke(250,180,10);
2
3  EsploraTFT.line(xPos, EsploraTFT.height() - graphHeight, xPos, EsploraTFT.height());

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1if (xPos >= 160) {
2
3    xPos = 0;
4
5    EsploraTFT.background(250,16,200);
6
7  }
8
9  else {
10
11    xPos++;
12
13  }
14
15  delay(16);
16}

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1/*
2
3 Esplora TFT Graph
4
5 This example for the Esplora with an Arduino TFT reads
6
7 the value of the light sensor, and graphs the values on
8
9 the screen.
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/EsploraTFTGraph
16
17 */
18
19#include <Esplora.h>
20#include <TFT.h>  // Arduino LCD library
21#include <SPI.h>
22
23// position of the line on screen
24int xPos = 0;
25
26void setup() {
27
28  // initialize the screen
29
30  EsploraTFT.begin();
31
32  // clear the screen with a nice color
33
34  EsploraTFT.background(250, 16, 200);
35}
36
37void loop() {
38
39  // read the sensor value
40
41  int sensor = Esplora.readLightSensor();
42
43  // map the sensor value to the height of the screen
44
45  int graphHeight = map(sensor, 0, 1023, 0, EsploraTFT.height());
46
47  // draw the line in a pretty color
48
49  EsploraTFT.stroke(250, 180, 10);
50
51  EsploraTFT.line(xPos, EsploraTFT.height() - graphHeight, xPos, EsploraTFT.height());
52
53  // if the graph reaches the edge of the screen
54
55  // erase it and start over from the other side
56
57  if (xPos >= 160) {
58
59    xPos = 0;
60
61    EsploraTFT.background(250, 16, 200);
62
63  } else {
64
65    // increment the horizontal position:
66
67    xPos++;
68
69  }
70
71  delay(16);
72}