56 lines
1.2 KiB
Arduino
56 lines
1.2 KiB
Arduino
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/*
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Esplora TFT Graph
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This example for the Esplora with an Arduino TFT reads
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the value of the light sensor, and graphs the values on
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the screen.
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This example code is in the public domain.
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Created 15 April 2013 by Scott Fitzgerald
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http://www.arduino.cc/en/Tutorial/EsploraTFTGraph
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*/
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#include <Esplora.h>
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#include <TFT.h> // Arduino LCD library
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#include <SPI.h>
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// position of the line on screen
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int xPos = 0;
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void setup() {
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// initialize the screen
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EsploraTFT.begin();
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// clear the screen with a nice color
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EsploraTFT.background(250, 16, 200);
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}
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void loop() {
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// read the sensor value
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int sensor = Esplora.readLightSensor();
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// map the sensor value to the height of the screen
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int graphHeight = map(sensor, 0, 1023, 0, EsploraTFT.height());
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// draw the line in a pretty color
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EsploraTFT.stroke(250, 180, 10);
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EsploraTFT.line(xPos, EsploraTFT.height() - graphHeight, xPos, EsploraTFT.height());
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// if the graph reaches the edge of the screen
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// erase it and start over from the other side
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if (xPos >= 160) {
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xPos = 0;
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EsploraTFT.background(250, 16, 200);
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} else {
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// increment the horizontal position:
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xPos++;
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}
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delay(16);
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}
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