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