A library with drivers for different peripherals on the LPC4088 QuickStart Board or related add-on boards.

Dependencies:   FATFileSystem

Dependents:   LPC4088test LPC4088test_ledonly LPC4088test_deleteall LPC4088_RAMtest ... more



File content as of revision 4:b32cf4ef45c5:

#ifndef MMA7455_H
#define MMA7455_H

 * Freescale Accelerometer MMA7455.
class MMA7455 {

    enum Mode {
        ModeStandby = 0,
        ModeMeasurement = 1,

    /** Acceleration range */
    enum Range {
        Range_8g = 0,
        Range_2g = 1,
        Range_4g = 2

     * Create an interface to the MMA7455 accelerometer
     * @param sda I2C data line pin
     * @param scl I2C clock line pin
    MMA7455(PinName sda, PinName scl);

    bool setMode(Mode mode);
    bool setRange(Range range);

    bool read(int32_t& x, int32_t& y, int32_t& z);

     * Calibrate for 0g, that is, calculate offset to achieve
     * 0g values when accelerometer is placed on flat surface.
     * Please make sure the accelerometer is placed on a flat surface before
     * calling this function.
     * @return true if request was successful; otherwise false
    bool calibrate();

     * Get calculated offset values. Offsets will be calculated by the
     * calibrate() method.
     * Use these values and put them in persistent storage to avoid
     * having to calibrate the accelerometer after a reset/power cycle.
     * @param xOff x offset is written to this argument
     * @param yOff y offset is written to this argument
     * @param zOff z offset is written to this argument
     * @return true if request was successful; otherwise false
    bool getCalibrationOffsets(int32_t& xOff, int32_t& yOff, int32_t& zOff);

     * Set calibration offset values. These values should normally
     * at one point in time have been retrieved by calling the
     * getCalibrationOffsets method.
     * @param xOff x offset
     * @param yOff y offset
     * @param zOff z offset
     * @return true if request was successful; otherwise false
    bool setCalibrationOffsets(int32_t xOff, int32_t yOff, int32_t zOff);


    I2C _i2c;
    Mode _mode;
    Range _range;
    int32_t _xOff;
    int32_t _yOff;
    int32_t _zOff;

    int getStatus();
    int getModeControl();
    int setModeControl(uint8_t mctl);