First Commit

libraries/Adafruit_TouchScreen/examples/touchscreendemo/touchscreendemo.ino

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+// Touch screen library with X Y and Z (pressure) readings as well
+// as oversampling to avoid 'bouncing'
+// This demo code returns raw readings, public domain
+
+#include <stdint.h>
+#include "TouchScreen.h"
+
+#define YP A2  // must be an analog pin, use "An" notation!
+#define XM A3  // must be an analog pin, use "An" notation!
+#define YM 8   // can be a digital pin
+#define XP 9   // can be a digital pin
+
+// For better pressure precision, we need to know the resistance
+// between X+ and X- Use any multimeter to read it
+// For the one we're using, its 300 ohms across the X plate
+TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
+
+void setup(void) {
+  Serial.begin(9600);
+}
+
+void loop(void) {
+  // a point object holds x y and z coordinates
+  TSPoint p = ts.getPoint();
+  
+  // we have some minimum pressure we consider 'valid'
+  // pressure of 0 means no pressing!
+  if (p.z > ts.pressureThreshhold) {
+     Serial.print("X = "); Serial.print(p.x);
+     Serial.print("\tY = "); Serial.print(p.y);
+     Serial.print("\tPressure = "); Serial.println(p.z);
+  }
+
+  delay(100);
+}