Simple library for MAG3110 magenetometer as built into Avnet Wi-Go module
Dependents: Wi-Go-MagnetometerTest EE202A_HW1_MH serialtoxively mbed_nanosec_timer ... more
MAG3110.h
- Committer:
- JimCarver
- Date:
- 2014-05-16
- Revision:
- 9:1da3fe7b3510
- Parent:
- 5:f3abe901c33a
File content as of revision 9:1da3fe7b3510:
/* * MAG3110 Sensor Library for mbed * TODO: Add proper header */ #ifndef MAG3110_H #define MAG3110_H #include "mbed.h" #include "MotionSensor.h" #define PI 3.14159265359 #define MAG_ADDR 0x1D // define registers #define MAG_DR_STATUS 0x00 #define MAG_OUT_X_MSB 0x01 #define MAG_OUT_X_LSB 0x02 #define MAG_OUT_Y_MSB 0x03 #define MAG_OUT_Y_LSB 0x04 #define MAG_OUT_Z_MSB 0x05 #define MAG_OUT_Z_LSB 0x06 #define MAG_WHOAMI 0x07 #define MAG_SYSMOD 0x08 #define MAG_OFF_X_MSB 0x09 #define MAG_OFF_X_LSB 0x0A #define MAG_OFF_Y_MSB 0x0B #define MAG_OFF_Y_LSB 0x0C #define MAG_OFF_Z_MSB 0x0D #define MAG_OFF_Z_LSB 0x0E #define MAG_DIE_TEMP 0x0F #define MAG_CTRL_REG1 0x10 #define MAG_CTRL_REG2 0x11 // what should WHO_AM_I return? #define MAG_3110_WHO_AM_I_VALUE 0xC4 // Fields in registers // CTRL_REG1: dr2,dr1,dr0 os1,os0 fr tm ac // Sampling rate from 80Hz down to 0.625Hz #define MAG_3110_SAMPLE80 0 #define MAG_3110_SAMPLE40 0x20 #define MAG_3110_SAMPLE20 0x40 #define MAG_3110_SAMPLE10 0x60 #define MAG_3110_SAMPLE5 0x80 #define MAG_3110_SAMPLE2_5 0xA0 #define MAG_3110_SAMPLE1_25 0xC0 #define MAG_3110_SAMPLE0_625 0xE0 // How many samples to average (lowers data rate) #define MAG_3110_OVERSAMPLE1 0 #define MAG_3110_OVERSAMPLE2 0x08 #define MAG_3110_OVERSAMPLE3 0x10 #define MAG_3110_OVERSAMPLE4 0x18 // read only 1 byte per axis #define MAG_3110_FASTREAD 0x04 // do one measurement (even if in standby mode) #define MAG_3110_TRIGGER 0x02 // put in active mode #define MAG_3110_ACTIVE 0x01 // CTRL_REG2: AUTO_MRST_EN _ RAW MAG_RST _ _ _ _ _ // reset sensor after each reading #define MAG_3110_AUTO_MRST_EN 0x80 // don't subtract user offsets #define MAG_3110_RAW 0x20 // reset magnetic sensor after too-large field #define MAG_3110_MAG_RST 0x10 // DR_STATUS Register ZYXOW ZOW YOW XOW ZYXDR ZDR YDR XDR #define MAG_3110_ZYXDR 0x08 /** * MAG3110 Class to read X/Y/Z data from the magentometer * */ class MAG3110 : public MotionSensor { public: /** * Main constructor * @param sda SDA pin * @param sdl SCL pin * @param addr addr of the I2C peripheral */ MAG3110(PinName sda, PinName scl); void enable(void); void disable(void); uint32_t sampleRate(uint32_t fequency); uint32_t whoAmI(void); uint32_t dataReady(void); void getX(int16_t * x); void getY(int16_t * y); void getZ(int16_t * z); void getX(float * x); void getY(float * y); void getZ(float * z); void getAxis(MotionSensorDataCounts &data); void getAxis(MotionSensorDataUnits &data); void readRegs(int addr, uint8_t * data, int len); private: I2C m_i2c; char m_addr; int16_t getMagAxis(uint8_t addr); void writeRegs(uint8_t * data, int len); }; #endif