Naresh Krish / Mbed OS itracker-mbed-os-example-lis2mdl

Sample program on how to use the LIS2MDL sensor on the RAKWirelss iTracker module

Dependencies:   LIS2MDL

main.cpp@0:10c0e81df4ba, 2018-02-12 (annotated)

Committer:
knaresh89
Date:
Mon Feb 12 04:58:22 2018 +0000
Revision:
0:10c0e81df4ba
Sample app for the LIS2MDL sensor on the RAKWireless iTracker module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
knaresh89 0:10c0e81df4ba 1 #include "mbed.h"
knaresh89 0:10c0e81df4ba 2 #include "LIS2MDL.h"
knaresh89 0:10c0e81df4ba 3
knaresh89 0:10c0e81df4ba 4 #define LIS2MDL_intPin p16 // interrupt for magnetometer data ready
knaresh89 0:10c0e81df4ba 5
knaresh89 0:10c0e81df4ba 6 uint8_t MODR = MODR_100Hz;
knaresh89 0:10c0e81df4ba 7 int16_t temp[3] = {0, 0, 0};
knaresh89 0:10c0e81df4ba 8 float magBias[3] = {0,0,0}, magScale[3] = {0,0,0};
knaresh89 0:10c0e81df4ba 9
knaresh89 0:10c0e81df4ba 10 //Attach interrupt to this pin if you want to use magnetometer sensor interrupt
knaresh89 0:10c0e81df4ba 11 // Before that make sure to set the correct interrupt value in the INT_CTRL_REG, INT_THS_L_REG and the INT_THS_H_REG (threshold value)
knaresh89 0:10c0e81df4ba 12 DigitalIn interruptPin(LIS2MDL_intPin);
knaresh89 0:10c0e81df4ba 13
knaresh89 0:10c0e81df4ba 14 // The itracker has the LIS2MDL sensor on the 13 and 11 I2C pins
knaresh89 0:10c0e81df4ba 15 I2C i2c(p13,p11);
knaresh89 0:10c0e81df4ba 16
knaresh89 0:10c0e81df4ba 17 // main() method. Runs in its own thread in the OS
knaresh89 0:10c0e81df4ba 18 int main()
knaresh89 0:10c0e81df4ba 19 {
knaresh89 0:10c0e81df4ba 20 //Create LIS2MDL object
knaresh89 0:10c0e81df4ba 21 LIS2MDL sensor(i2c, LIS2MDL_ADDRESS);
knaresh89 0:10c0e81df4ba 22
knaresh89 0:10c0e81df4ba 23 //Reset the sensor to ensure correct starting config register values
knaresh89 0:10c0e81df4ba 24 sensor.reset();
knaresh89 0:10c0e81df4ba 25 wait(3);
knaresh89 0:10c0e81df4ba 26
knaresh89 0:10c0e81df4ba 27 //Intialise the CHIP with the MODR value chosen
knaresh89 0:10c0e81df4ba 28 sensor.init(MODR);
knaresh89 0:10c0e81df4ba 29
knaresh89 0:10c0e81df4ba 30 //Test the Chip ID. Should return 64 (0x40)
knaresh89 0:10c0e81df4ba 31 sensor.getChipID();
knaresh89 0:10c0e81df4ba 32
knaresh89 0:10c0e81df4ba 33 // Calcaulte the offset bias to be used in future reading. See self check for example usage
knaresh89 0:10c0e81df4ba 34 sensor.offsetBias(magBias, magScale);
knaresh89 0:10c0e81df4ba 35
knaresh89 0:10c0e81df4ba 36 // Read the internal temp sensor
knaresh89 0:10c0e81df4ba 37 sensor.readTemperature();
knaresh89 0:10c0e81df4ba 38
knaresh89 0:10c0e81df4ba 39 //Get readings from the sensor;
knaresh89 0:10c0e81df4ba 40 for(int i=0; i<60; i++) {
knaresh89 0:10c0e81df4ba 41 int16_t temp[3] = {0, 0, 0};
knaresh89 0:10c0e81df4ba 42 sensor.readData(temp);
knaresh89 0:10c0e81df4ba 43 wait(0.1);
knaresh89 0:10c0e81df4ba 44 }
knaresh89 0:10c0e81df4ba 45 }
knaresh89 0:10c0e81df4ba 46