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62 lines
1.5 KiB
Plaintext
62 lines
1.5 KiB
Plaintext
/*
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Memsic2125
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Read the Memsic 2125 two-axis accelerometer. Converts the
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pulses output by the 2125 into milli-g's (1/1000 of earth's
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gravity) and prints them over the serial connection to the
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computer.
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The circuit:
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* X output of accelerometer to digital pin 2
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* Y output of accelerometer to digital pin 3
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* +V of accelerometer to +5V
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* GND of accelerometer to ground
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http://www.arduino.cc/en/Tutorial/Memsic2125
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created 6 Nov 2008
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by David A. Mellis
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modified 30 Jun 2009
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by Tom Igoe
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*/
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// these constants won't change:
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const int xPin = 2; // X output of the accelerometer
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const int yPin = 3; // Y output of the accelerometer
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void setup() {
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// initialize serial communications:
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Serial.begin(9600);
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// initialize the pins connected to the accelerometer
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// as inputs:
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pinMode(xPin, INPUT);
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pinMode(yPin, INPUT);
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}
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void loop() {
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// variables to read the pulse widths:
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int pulseX, pulseY;
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// variables to contain the resulting accelerations
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int accelerationX, accelerationY;
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// read pulse from x- and y-axes:
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pulseX = pulseIn(xPin,HIGH);
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pulseY = pulseIn(yPin,HIGH);
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// convert the pulse width into acceleration
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// accelerationX and accelerationY are in milli-g's:
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// earth's gravity is 1000 milli-g's, or 1g.
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accelerationX = ((pulseX / 10) - 500) * 8;
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accelerationY = ((pulseY / 10) - 500) * 8;
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// print the acceleration
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Serial.print(accelerationX);
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// print a tab character:
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Serial.print("\t");
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Serial.print(accelerationY);
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Serial.println();
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delay(100);
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}
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