38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
// Touch screen library with X Y and Z (pressure) readings as well
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// as oversampling to avoid 'bouncing'
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// This demo code returns raw readings, public domain
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#include <stdint.h>
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#include "TouchScreen.h"
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// These are the pins for the shield!
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#define YP A1 // must be an analog pin, use "An" notation!
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#define XM A2 // must be an analog pin, use "An" notation!
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#define YM 7 // can be a digital pin
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#define XP 6 // can be a digital pin
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#define MINPRESSURE 10
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#define MAXPRESSURE 1000
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// For better pressure precision, we need to know the resistance
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// between X+ and X- Use any multimeter to read it
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// For the one we're using, its 300 ohms across the X plate
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TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
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void setup(void) {
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Serial.begin(9600);
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}
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void loop(void) {
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// a point object holds x y and z coordinates
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TSPoint p = ts.getPoint();
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// we have some minimum pressure we consider 'valid'
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// pressure of 0 means no pressing!
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if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
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Serial.print("X = "); Serial.print(p.x);
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Serial.print("\tY = "); Serial.print(p.y);
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Serial.print("\tPressure = "); Serial.println(p.z);
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}
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}
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