Accelerometer library following SparkFun experiment guide.
MMA8452Q.h@0:b3305e3c9e73, 2017-10-19 (annotated)
- Committer:
- slicht
- Date:
- Thu Oct 19 12:53:02 2017 +0000
- Revision:
- 0:b3305e3c9e73
Initial commit for OCE360_4
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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slicht | 0:b3305e3c9e73 | 1 | // Library for our MMA8452Q 3-axis accelerometer |
slicht | 0:b3305e3c9e73 | 2 | // Based on the MMA8452Q Arduino Library by Jim Lindblom (SparkFun Electronics) |
slicht | 0:b3305e3c9e73 | 3 | |
slicht | 0:b3305e3c9e73 | 4 | #ifndef MMA8452Q_H |
slicht | 0:b3305e3c9e73 | 5 | #define MMA8452Q_H |
slicht | 0:b3305e3c9e73 | 6 | |
slicht | 0:b3305e3c9e73 | 7 | #include "mbed.h" |
slicht | 0:b3305e3c9e73 | 8 | |
slicht | 0:b3305e3c9e73 | 9 | // Register definitions |
slicht | 0:b3305e3c9e73 | 10 | #define REG_STATUS 0x00 |
slicht | 0:b3305e3c9e73 | 11 | #define OUT_X_MSB 0x01 |
slicht | 0:b3305e3c9e73 | 12 | #define OUT_X_LSB 0x02 |
slicht | 0:b3305e3c9e73 | 13 | #define OUT_Y_MSB 0x03 |
slicht | 0:b3305e3c9e73 | 14 | #define OUT_Y_LSB 0x04 |
slicht | 0:b3305e3c9e73 | 15 | #define OUT_Z_MSB 0x05 |
slicht | 0:b3305e3c9e73 | 16 | #define OUT_Z_LSB 0x06 |
slicht | 0:b3305e3c9e73 | 17 | #define REG_WHO_AM_I 0x0D |
slicht | 0:b3305e3c9e73 | 18 | #define REG_XYZ_DATA_CFG 0x0E |
slicht | 0:b3305e3c9e73 | 19 | #define REG_CTRL_REG1 0x2A |
slicht | 0:b3305e3c9e73 | 20 | |
slicht | 0:b3305e3c9e73 | 21 | // WHO_AM_I check |
slicht | 0:b3305e3c9e73 | 22 | #define FACTORY_ID 0x2A |
slicht | 0:b3305e3c9e73 | 23 | |
slicht | 0:b3305e3c9e73 | 24 | // Scale definitions |
slicht | 0:b3305e3c9e73 | 25 | #define SCALE_2G 2 |
slicht | 0:b3305e3c9e73 | 26 | #define SCALE_4G 4 |
slicht | 0:b3305e3c9e73 | 27 | #define SCALE_8G 8 |
slicht | 0:b3305e3c9e73 | 28 | |
slicht | 0:b3305e3c9e73 | 29 | // Data rates |
slicht | 0:b3305e3c9e73 | 30 | #define ODR_800HZ 0 |
slicht | 0:b3305e3c9e73 | 31 | #define ODR_400HZ 1 |
slicht | 0:b3305e3c9e73 | 32 | #define ODR_200HZ 2 |
slicht | 0:b3305e3c9e73 | 33 | #define ODR_100HZ 3 |
slicht | 0:b3305e3c9e73 | 34 | #define ODR_50HZ 4 |
slicht | 0:b3305e3c9e73 | 35 | #define ODR_12_5HZ 5 |
slicht | 0:b3305e3c9e73 | 36 | #define ODR_6_25HZ 6 |
slicht | 0:b3305e3c9e73 | 37 | #define ODR_1_56HZ 7 |
slicht | 0:b3305e3c9e73 | 38 | |
slicht | 0:b3305e3c9e73 | 39 | // Init values |
slicht | 0:b3305e3c9e73 | 40 | #define DEFAULT_FSR SCALE_2G |
slicht | 0:b3305e3c9e73 | 41 | #define DEFAULT_ODR ODR_800HZ |
slicht | 0:b3305e3c9e73 | 42 | |
slicht | 0:b3305e3c9e73 | 43 | |
slicht | 0:b3305e3c9e73 | 44 | // Class declaration |
slicht | 0:b3305e3c9e73 | 45 | class MMA8452Q |
slicht | 0:b3305e3c9e73 | 46 | { |
slicht | 0:b3305e3c9e73 | 47 | public: |
slicht | 0:b3305e3c9e73 | 48 | MMA8452Q(PinName sda, PinName scl, int addr); |
slicht | 0:b3305e3c9e73 | 49 | ~MMA8452Q(); |
slicht | 0:b3305e3c9e73 | 50 | bool init(); |
slicht | 0:b3305e3c9e73 | 51 | uint8_t available(); |
slicht | 0:b3305e3c9e73 | 52 | void setScale(uint8_t fsr); |
slicht | 0:b3305e3c9e73 | 53 | void setODR(uint8_t odr); |
slicht | 0:b3305e3c9e73 | 54 | void standby(); |
slicht | 0:b3305e3c9e73 | 55 | void active(); |
slicht | 0:b3305e3c9e73 | 56 | float readX(); |
slicht | 0:b3305e3c9e73 | 57 | float readY(); |
slicht | 0:b3305e3c9e73 | 58 | float readZ(); |
slicht | 0:b3305e3c9e73 | 59 | uint8_t readRegister(uint8_t reg); |
slicht | 0:b3305e3c9e73 | 60 | void writeRegister(uint8_t reg, uint8_t data); |
slicht | 0:b3305e3c9e73 | 61 | |
slicht | 0:b3305e3c9e73 | 62 | private: |
slicht | 0:b3305e3c9e73 | 63 | I2C m_i2c; |
slicht | 0:b3305e3c9e73 | 64 | int m_addr; |
slicht | 0:b3305e3c9e73 | 65 | int scale; |
slicht | 0:b3305e3c9e73 | 66 | }; |
slicht | 0:b3305e3c9e73 | 67 | |
slicht | 0:b3305e3c9e73 | 68 | #endif |