accelerometer
Dependents: embedded_answ_2 embedded_answ_2_
MMA7660.h@0:7bc29a9ea016, 2012-10-14 (annotated)
- Committer:
- Sissors
- Date:
- Sun Oct 14 08:02:53 2012 +0000
- Revision:
- 0:7bc29a9ea016
- Child:
- 1:8997a1b348dd
v0.1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Sissors | 0:7bc29a9ea016 | 1 | #include "mbed.h" |
Sissors | 0:7bc29a9ea016 | 2 | |
Sissors | 0:7bc29a9ea016 | 3 | |
Sissors | 0:7bc29a9ea016 | 4 | #ifndef MMA7660_H |
Sissors | 0:7bc29a9ea016 | 5 | #define MMA7660_H |
Sissors | 0:7bc29a9ea016 | 6 | |
Sissors | 0:7bc29a9ea016 | 7 | #define MMA7660_ADDRESS 0x98 |
Sissors | 0:7bc29a9ea016 | 8 | #define MMA7660_SENSITIVITY 21.33 |
Sissors | 0:7bc29a9ea016 | 9 | |
Sissors | 0:7bc29a9ea016 | 10 | #define MMA7660_XOUT_R 0x00 |
Sissors | 0:7bc29a9ea016 | 11 | #define MMA7660_YOUT_R 0x01 |
Sissors | 0:7bc29a9ea016 | 12 | #define MMA7660_ZOUT_R 0x02 |
Sissors | 0:7bc29a9ea016 | 13 | #define MMA7660_MODE_R 0x07 |
Sissors | 0:7bc29a9ea016 | 14 | |
Sissors | 0:7bc29a9ea016 | 15 | class MMA7660 |
Sissors | 0:7bc29a9ea016 | 16 | { |
Sissors | 0:7bc29a9ea016 | 17 | public: |
Sissors | 0:7bc29a9ea016 | 18 | /** |
Sissors | 0:7bc29a9ea016 | 19 | * Creates a new MMA7660 object |
Sissors | 0:7bc29a9ea016 | 20 | * |
Sissors | 0:7bc29a9ea016 | 21 | * @param sda - I2C data pin |
Sissors | 0:7bc29a9ea016 | 22 | * @param scl - I2C clock pin |
Sissors | 0:7bc29a9ea016 | 23 | * @param interrupt - Interrupt pin (default = NC) |
Sissors | 0:7bc29a9ea016 | 24 | */ |
Sissors | 0:7bc29a9ea016 | 25 | MMA7660(PinName sda, PinName scl, PinName interrupt = NC); |
Sissors | 0:7bc29a9ea016 | 26 | |
Sissors | 0:7bc29a9ea016 | 27 | /** |
Sissors | 0:7bc29a9ea016 | 28 | * Tests if communication is possible with the MMA7660 |
Sissors | 0:7bc29a9ea016 | 29 | * |
Sissors | 0:7bc29a9ea016 | 30 | * Because the MMA7660 lacks a WHO_AM_I register, this function can only check |
Sissors | 0:7bc29a9ea016 | 31 | * if there is an I2C device that responds to the MMA7660 address |
Sissors | 0:7bc29a9ea016 | 32 | * |
Sissors | 0:7bc29a9ea016 | 33 | * @param return - true for successfull connection, false for no connection |
Sissors | 0:7bc29a9ea016 | 34 | */ |
Sissors | 0:7bc29a9ea016 | 35 | bool testConnection( void ); |
Sissors | 0:7bc29a9ea016 | 36 | |
Sissors | 0:7bc29a9ea016 | 37 | /** |
Sissors | 0:7bc29a9ea016 | 38 | * Sets the active state of the MMA7660 |
Sissors | 0:7bc29a9ea016 | 39 | * |
Sissors | 0:7bc29a9ea016 | 40 | * Note: This is unrelated to awake/sleep mode |
Sissors | 0:7bc29a9ea016 | 41 | * |
Sissors | 0:7bc29a9ea016 | 42 | * @param state - true for active, false for standby |
Sissors | 0:7bc29a9ea016 | 43 | */ |
Sissors | 0:7bc29a9ea016 | 44 | void setActive( bool state); |
Sissors | 0:7bc29a9ea016 | 45 | |
Sissors | 0:7bc29a9ea016 | 46 | /** |
Sissors | 0:7bc29a9ea016 | 47 | * Reads acceleration data from the sensor |
Sissors | 0:7bc29a9ea016 | 48 | * |
Sissors | 0:7bc29a9ea016 | 49 | * When the parameter is a pointer to an integer array it will be the raw data. |
Sissors | 0:7bc29a9ea016 | 50 | * When it is a pointer to a float array it will be the acceleration in g's |
Sissors | 0:7bc29a9ea016 | 51 | * |
Sissors | 0:7bc29a9ea016 | 52 | * @param data - pointer to array with length 3 where the acceleration data will be stores, X-Y-Z |
Sissors | 0:7bc29a9ea016 | 53 | */ |
Sissors | 0:7bc29a9ea016 | 54 | void readData( int *data); |
Sissors | 0:7bc29a9ea016 | 55 | void readData( float *data); |
Sissors | 0:7bc29a9ea016 | 56 | |
Sissors | 0:7bc29a9ea016 | 57 | /** Get X-data |
Sissors | 0:7bc29a9ea016 | 58 | * |
Sissors | 0:7bc29a9ea016 | 59 | * @param return - X-acceleration in g's |
Sissors | 0:7bc29a9ea016 | 60 | */ |
Sissors | 0:7bc29a9ea016 | 61 | float getX( void ); |
Sissors | 0:7bc29a9ea016 | 62 | |
Sissors | 0:7bc29a9ea016 | 63 | /** Get Y-data |
Sissors | 0:7bc29a9ea016 | 64 | * |
Sissors | 0:7bc29a9ea016 | 65 | * @param return - Y-acceleration in g's |
Sissors | 0:7bc29a9ea016 | 66 | */ |
Sissors | 0:7bc29a9ea016 | 67 | float getY( void ); |
Sissors | 0:7bc29a9ea016 | 68 | |
Sissors | 0:7bc29a9ea016 | 69 | /** Get Z-data |
Sissors | 0:7bc29a9ea016 | 70 | * |
Sissors | 0:7bc29a9ea016 | 71 | * @param return - Z-acceleration in g's |
Sissors | 0:7bc29a9ea016 | 72 | */ |
Sissors | 0:7bc29a9ea016 | 73 | float getZ( void ); |
Sissors | 0:7bc29a9ea016 | 74 | |
Sissors | 0:7bc29a9ea016 | 75 | |
Sissors | 0:7bc29a9ea016 | 76 | private: |
Sissors | 0:7bc29a9ea016 | 77 | |
Sissors | 0:7bc29a9ea016 | 78 | /** |
Sissors | 0:7bc29a9ea016 | 79 | * Writes data to the device, could be private, but public is handy so you can transmit directly to the MPU. |
Sissors | 0:7bc29a9ea016 | 80 | * |
Sissors | 0:7bc29a9ea016 | 81 | * @param adress - register address to write to |
Sissors | 0:7bc29a9ea016 | 82 | * @param data - data to write |
Sissors | 0:7bc29a9ea016 | 83 | */ |
Sissors | 0:7bc29a9ea016 | 84 | void write( char address, char data); |
Sissors | 0:7bc29a9ea016 | 85 | |
Sissors | 0:7bc29a9ea016 | 86 | /** |
Sissors | 0:7bc29a9ea016 | 87 | * Read data from the device, could be private, but public is handy so you can transmit directly to the MPU. |
Sissors | 0:7bc29a9ea016 | 88 | * |
Sissors | 0:7bc29a9ea016 | 89 | * @param adress - register address to write to |
Sissors | 0:7bc29a9ea016 | 90 | * @return - data from the register specified by RA |
Sissors | 0:7bc29a9ea016 | 91 | */ |
Sissors | 0:7bc29a9ea016 | 92 | char read( char adress); |
Sissors | 0:7bc29a9ea016 | 93 | |
Sissors | 0:7bc29a9ea016 | 94 | /** |
Sissors | 0:7bc29a9ea016 | 95 | * Read multiple regigsters from the device, more efficient than using multiple normal reads. |
Sissors | 0:7bc29a9ea016 | 96 | * |
Sissors | 0:7bc29a9ea016 | 97 | * @param adress - register address to write to |
Sissors | 0:7bc29a9ea016 | 98 | * @param length - number of bytes to read |
Sissors | 0:7bc29a9ea016 | 99 | * @param data - pointer where the data needs to be written to |
Sissors | 0:7bc29a9ea016 | 100 | */ |
Sissors | 0:7bc29a9ea016 | 101 | void read( char adress, char *data, int length); |
Sissors | 0:7bc29a9ea016 | 102 | |
Sissors | 0:7bc29a9ea016 | 103 | /** |
Sissors | 0:7bc29a9ea016 | 104 | * Reads single axis |
Sissors | 0:7bc29a9ea016 | 105 | */ |
Sissors | 0:7bc29a9ea016 | 106 | float getSingle(int number); |
Sissors | 0:7bc29a9ea016 | 107 | |
Sissors | 0:7bc29a9ea016 | 108 | I2C _i2c; |
Sissors | 0:7bc29a9ea016 | 109 | bool active; |
Sissors | 0:7bc29a9ea016 | 110 | PinName _interrupt; |
Sissors | 0:7bc29a9ea016 | 111 | float samplerate; |
Sissors | 0:7bc29a9ea016 | 112 | }; |
Sissors | 0:7bc29a9ea016 | 113 | |
Sissors | 0:7bc29a9ea016 | 114 | |
Sissors | 0:7bc29a9ea016 | 115 | #endif |