[136] | 1 | /*
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| 2 |
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| 3 | Esplora TFT Graph
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| 4 |
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| 5 | This example for the Esplora with an Arduino TFT reads
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| 6 | the value of the light sensor, and graphs the values on
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| 7 | the screen.
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| 8 |
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| 9 | This example code is in the public domain.
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| 10 |
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| 11 | Created 15 April 2013 by Scott Fitzgerald
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| 12 |
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| 13 | http://arduino.cc/en/Tutorial/EsploraTFTGraph
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| 14 |
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| 15 | */
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| 16 |
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| 17 | #include <Esplora.h>
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| 18 | #include <TFT.h> // Arduino LCD library
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| 19 | #include <SPI.h>
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| 20 |
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| 21 | // position of the line on screen
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| 22 | int xPos = 0;
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| 23 |
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| 24 | void setup() {
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| 25 |
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| 26 | // initialize the screen
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| 27 | EsploraTFT.begin();
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| 28 |
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| 29 | // clear the screen with a nice color
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| 30 | EsploraTFT.background(250, 16, 200);
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| 31 | }
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| 32 |
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| 33 | void loop() {
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| 34 |
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| 35 | // read the sensor value
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| 36 | int sensor = Esplora.readLightSensor();
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| 37 | // map the sensor value to the height of the screen
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| 38 | int graphHeight = map(sensor, 0, 1023, 0, EsploraTFT.height());
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| 39 |
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| 40 | // draw the line in a pretty color
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| 41 | EsploraTFT.stroke(250, 180, 10);
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| 42 | EsploraTFT.line(xPos, EsploraTFT.height() - graphHeight, xPos, EsploraTFT.height());
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| 43 |
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| 44 | // if the graph reaches the edge of the screen
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| 45 | // erase it and start over from the other side
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| 46 | if (xPos >= 160) {
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| 47 | xPos = 0;
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| 48 | EsploraTFT.background(250, 16, 200);
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| 49 | }
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| 50 | else {
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| 51 | // increment the horizontal position:
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| 52 | xPos++;
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| 53 | }
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| 54 |
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| 55 | delay(16);
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| 56 | }
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