bendns' repos / ArduinoStuff
arduino stuffs
Diffstat (limited to 'libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino')
-rw-r--r--libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino80
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diff --git a/libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino b/libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino
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+++ b/libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino
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+/*
+
+ Esplora TFT EtchASketch
+
+ This example for the Arduino TFT and Esplora draws
+ a white line on the screen, based on the position
+ of the joystick. To clear the screen, shake the
+ Esplora, using the values from the accelerometer.
+
+ This example code is in the public domain.
+
+ Created 15 April 2013 by Scott Fitzgerald
+
+ http://www.arduino.cc/en/Tutorial/EsploraTFTEtchASketch
+
+ */
+
+#include <Esplora.h>
+#include <TFT.h> // Arduino LCD library
+#include <SPI.h>
+
+// initial position of the cursor
+int xPos = EsploraTFT.width() / 2;
+int yPos = EsploraTFT.height() / 2;
+
+void setup() {
+ // initialize the display
+ EsploraTFT.begin();
+
+ // clear the background
+ EsploraTFT.background(0, 0, 0);
+}
+
+void loop() {
+
+ int xAxis = Esplora.readJoystickX(); // read the X axis
+ int yAxis = Esplora.readJoystickY(); // read the Y axis
+
+ // update the position of the line
+ // depending on the position of the joystick
+ if (xAxis < 10 && xAxis > -10) {
+ xPos = xPos;
+ } else {
+ xPos = xPos + (map(xAxis, -512, 512, 2, -2));
+ }
+ if (yAxis < 10 && yAxis > -10) {
+ yAxis = yAxis;
+ } else {
+ yPos = yPos + (map(yAxis, -512, 512, -2, 2));
+ }
+
+ // don't let the point go past the screen edges
+ if (xPos > 159) {
+ (xPos = 159);
+ }
+
+ if (xPos < 0) {
+ (xPos = 0);
+ }
+ if (yPos > 127) {
+ (yPos = 127);
+ }
+
+ if (yPos < 0) {
+ (yPos = 0);
+ }
+
+ // draw the point
+ EsploraTFT.stroke(255, 255, 255);
+ EsploraTFT.point(xPos, yPos);
+
+ // check the accelerometer values and clear
+ // the screen if it is being shaken
+ if (abs(Esplora.readAccelerometer(X_AXIS)) > 200 || abs(Esplora.readAccelerometer(Y_AXIS)) > 200) {
+ EsploraTFT.background(0, 0, 0);
+ }
+
+ delay(33);
+}
+