Measure acceleration, tilt, and rotation with the Memsic MX2125 Dual-axis Accelerometer. More...

#include "simpletools.h"

Macros
#define	PI 3.141592653589793
	Approximation of PI for converting g to angular values like rotation and tilt.

Functions
int	mx_accel (int axisPin)
	Measure acceleration in terms of g (acceleration due to earth's gravity). A measurement of +/-1250 corresponds to approximately +/- 1 g. More...

int	mx_rotate (int xPin, int yPin)
	Measure clockwise rotation assuming accelerometer is held vertical. Zero degree rotation is when the triangle on the MX2125 chip is pointing up. More...

int	mx_tilt (int axisPin)
	Measure the level of tilt in terms of +/- 90 degrees. 0 degrees is when the top surface of the accelerometer chip is parallel to the ground. More...

Detailed Description

Measure acceleration, tilt, and rotation with the Memsic MX2125 Dual-axis Accelerometer.

Function Documentation

int mx_accel ( int axisPin)

Measure acceleration in terms of g (acceleration due to earth's gravity). A measurement of +/-1250 corresponds to approximately +/- 1 g.

Parameters

axisPin Number of I/O pin connected to either MX2125's X- or Y- axis pins.

Returns: Value that represents 1250ths of a g acting on the axis. 1250ths is a nominal value, the accelerometer is not that precise.

Measure clockwise rotation assuming accelerometer is held vertical. Zero degree rotation is when the triangle on the MX2125 chip is pointing up.

Parameters

xPin	Number of I/O pin connected to MX2125's x-axis pin.
yPin	Number of I/O pin connected to MX2125's y-axis pin.

Returns: Integer degree value (0 to 359) that represents the clockwise angle of rotation.

int mx_tilt ( int axisPin)

Measure the level of tilt in terms of +/- 90 degrees. 0 degrees is when the top surface of the accelerometer chip is parallel to the ground.

Parameters

axisPin Number of I/O pin connected to either of MX2125's X- or Y- axis pins.