added arduino, modified build

arduino/libraries/TFT/examples/Esplora/EsploraTFTEtchASketch/EsploraTFTEtchASketch.ino

@@ -0,0 +1,80 @@
+/*
+
+ 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);
+}
+