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3 axis accellerometer for pitch and roll on lcd and serial output
MMA7660.h
- Committer:
- Sissors
- Date:
- 2012-10-16
- Revision:
- 1:8997a1b348dd
- Parent:
- 0:7bc29a9ea016
- Child:
- 2:a8e20db7901e
File content as of revision 1:8997a1b348dd:
#include "mbed.h" #ifndef MMA7660_H #define MMA7660_H #define MMA7660_ADDRESS 0x98 #define MMA7660_SENSITIVITY 21.33 #define MMA7660_XOUT_R 0x00 #define MMA7660_YOUT_R 0x01 #define MMA7660_ZOUT_R 0x02 #define MMA7660_TILT_R 0x03 #define MMA7660_INT_R 0x06 #define MMA7660_MODE_R 0x07 #define MMA7660_SR_R 0x08 class MMA7660 { public: /** * The 6 different orientations and unknown * * Up & Down = X-axis * Right & Left = Y-axis * Back & Front = Z-axis * */ enum Orientation{Up, Down, Right, Left, Back, Front, Unknown}; /** * Creates a new MMA7660 object * * @param sda - I2C data pin * @param scl - I2C clock pin * @param interrupt - Interrupt pin (default = NC) */ MMA7660(PinName sda, PinName scl, PinName interrupt = NC); /** * Tests if communication is possible with the MMA7660 * * Because the MMA7660 lacks a WHO_AM_I register, this function can only check * if there is an I2C device that responds to the MMA7660 address * * @param return - true for successfull connection, false for no connection */ bool testConnection( void ); /** * Sets the active state of the MMA7660 * * Note: This is unrelated to awake/sleep mode * * @param state - true for active, false for standby */ void setActive( bool state); /** * Reads acceleration data from the sensor * * When the parameter is a pointer to an integer array it will be the raw data. * When it is a pointer to a float array it will be the acceleration in g's * * @param data - pointer to array with length 3 where the acceleration data will be stores, X-Y-Z */ void readData( int *data); void readData( float *data); /** * Get X-data * * @param return - X-acceleration in g's */ float getX( void ); /** * Get Y-data * * @param return - Y-acceleration in g's */ float getY( void ); /** * Get Z-data * * @param return - Z-acceleration in g's */ float getZ( void ); /** * Sets the active samplerate * * The entered samplerate will be rounded to nearest supported samplerate. * Supported samplerates are: 120 - 64 - 32 - 16 - 8 - 4 - 2 - 1 samples/second. * * @param samplerate - the samplerate that will be set */ void setSampleRate(int samplerate); /** * Returns which side is pointing down * * @param return - Orientation which is closest to down */ Orientation getGlobalOrientation( void ); /** * Returns if it is on its front, back, or unknown side * * This is read from MMA7760s registers, page 12 of datasheet * * @param return - Front, Back or Unknown orientation */ Orientation getSide( void ); /** * Returns if it is on it left, right, down or up side * * This is read from MMA7760s registers, page 12 of datasheet * * @param return - Left, Right, Down, Up or Unknown orientation */ Orientation getOrientation ( void ); /** * Returns if since last check there has been a tap * * @param return - bool that is true when a tap has been detected */ bool isTapped( void ); private: /** * Writes data to the device * * @param adress - register address to write to * @param data - data to write */ void write( char address, char data); /** * Read data from the device * * @param adress - register address to write to * @return - data from the register specified by RA */ char read( char adress); /** * Read multiple regigsters from the device, more efficient than using multiple normal reads. * * @param adress - register address to write to * @param length - number of bytes to read * @param data - pointer where the data needs to be written to */ void read( char adress, char *data, int length); /** * Reads single axis */ float getSingle(int number); I2C _i2c; bool active; PinName _interrupt; float samplerate; }; #endif