NXP / MAG3110

MAG3110 magnetometer library

Dependents:   FRDM-FXS-MULTI2-B_SensorShield_HelloWorld xtrinsic_sensors

MAG3110.cpp@0:f430a728163a, 2016-01-23 (annotated)

Committer:
AswinSivakumar
Date:
Sat Jan 23 00:04:56 2016 +0000
Revision:
0:f430a728163a
Child:
1:4194a41cfd16
First commit;

Who changed what in which revision?

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AswinSivakumar 0:f430a728163a 1 /* Copyright (c) 2015 NXP Semiconductors. MIT License
AswinSivakumar 0:f430a728163a 2 *
AswinSivakumar 0:f430a728163a 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
AswinSivakumar 0:f430a728163a 4 * and associated documentation files (the "Software"), to deal in the Software without
AswinSivakumar 0:f430a728163a 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
AswinSivakumar 0:f430a728163a 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
AswinSivakumar 0:f430a728163a 7 * Software is furnished to do so, subject to the following conditions:
AswinSivakumar 0:f430a728163a 8 *
AswinSivakumar 0:f430a728163a 9 * The above copyright notice and this permission notice shall be included in all copies or
AswinSivakumar 0:f430a728163a 10 * substantial portions of the Software.
AswinSivakumar 0:f430a728163a 11 *
AswinSivakumar 0:f430a728163a 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
AswinSivakumar 0:f430a728163a 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
AswinSivakumar 0:f430a728163a 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
AswinSivakumar 0:f430a728163a 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AswinSivakumar 0:f430a728163a 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
AswinSivakumar 0:f430a728163a 17 */
AswinSivakumar 0:f430a728163a 18
AswinSivakumar 0:f430a728163a 19 #include "MAG3110.h"
AswinSivakumar 0:f430a728163a 20 #include "mbed.h"
AswinSivakumar 0:f430a728163a 21
AswinSivakumar 0:f430a728163a 22 MAG3110::MAG3110(PinName sda, PinName scl) : MAG3110_i2c(sda,scl)
AswinSivakumar 0:f430a728163a 23 {
AswinSivakumar 0:f430a728163a 24
AswinSivakumar 0:f430a728163a 25 }
AswinSivakumar 0:f430a728163a 26
AswinSivakumar 0:f430a728163a 27
AswinSivakumar 0:f430a728163a 28 void MAG3110::MAG3110_config(void)
AswinSivakumar 0:f430a728163a 29 {
AswinSivakumar 0:f430a728163a 30 char d[2];
AswinSivakumar 0:f430a728163a 31 d[0] = MAG3110_CTRL_REG1; //Puts device in Standby mode
AswinSivakumar 0:f430a728163a 32 d[1] = 0x00;
AswinSivakumar 0:f430a728163a 33 MAG3110_i2c.write(MAG3110_I2C_ADDRESS, d,2);
AswinSivakumar 0:f430a728163a 34
AswinSivakumar 0:f430a728163a 35
AswinSivakumar 0:f430a728163a 36 d[0] = MAG3110_CTRL_REG2; //Set Automatic Magnetic Sensor Reset bit
AswinSivakumar 0:f430a728163a 37 d[1] = 0x80;
AswinSivakumar 0:f430a728163a 38 MAG3110_i2c.write(MAG3110_I2C_ADDRESS, d, 2);
AswinSivakumar 0:f430a728163a 39
AswinSivakumar 0:f430a728163a 40 d[0] = MAG3110_CTRL_REG1; //Set ODR=40Hz and OSR=32 and set device to active mode.
AswinSivakumar 0:f430a728163a 41 d[1] = 0x09;
AswinSivakumar 0:f430a728163a 42 MAG3110_i2c.write(MAG3110_I2C_ADDRESS, d, 2);
AswinSivakumar 0:f430a728163a 43
AswinSivakumar 0:f430a728163a 44
AswinSivakumar 0:f430a728163a 45 }
AswinSivakumar 0:f430a728163a 46
AswinSivakumar 0:f430a728163a 47 void MAG3110::acquire_MAG3110_data_uT(float * m_data)
AswinSivakumar 0:f430a728163a 48 {
AswinSivakumar 0:f430a728163a 49
AswinSivakumar 0:f430a728163a 50 char data_bytes[7];
AswinSivakumar 0:f430a728163a 51 char d[1];
AswinSivakumar 0:f430a728163a 52 d[0]=MAG3110_DR_STATUS;
AswinSivakumar 0:f430a728163a 53 MAG3110_i2c.write(MAG3110_I2C_ADDRESS,d,1,true);
AswinSivakumar 0:f430a728163a 54 MAG3110_i2c.read(MAG3110_I2C_ADDRESS,data_bytes,7);// Read the 6 data bytes - LSB and MSB for X, Y and Z Axes.
AswinSivakumar 0:f430a728163a 55
AswinSivakumar 0:f430a728163a 56 m_data[0] = (float)((int16_t)((data_bytes[1]*256) + (data_bytes[2]))) * 0.1;
AswinSivakumar 0:f430a728163a 57 m_data[1] = (float)((int16_t)((data_bytes[3]*256) + (data_bytes[4]))) * 0.1;
AswinSivakumar 0:f430a728163a 58 m_data[2] = (float)((int16_t)((data_bytes[5]*256) + (data_bytes[6]))) * 0.1;
AswinSivakumar 0:f430a728163a 59
AswinSivakumar 0:f430a728163a 60 }
AswinSivakumar 0:f430a728163a 61
AswinSivakumar 0:f430a728163a 62