Mbed driver for the Stmicroelectronics LIS2MDL sensor
Dependents: itracker-mbed-os-example-lis2mdl
Introduction
The LIS2MDL is an ultra-low-power, high-performance 3-axis digital magnetic sensor.
The LIS2MDL has a magnetic field dynamic range of ±50 gauss.
The LIS2MDL includes an I2C serial bus interface that supports standard, fast mode, fast mode plus, and high-speed (100 kHz, 400 kHz, 1 MHz, and 3.4 MHz) and an SPI serial standard interface.
More details in datasheet here: http://www.st.com/resource/en/datasheet/lis2mdl.pdf
This driver assumes the user will deploy the sensor over I2C. SPI update will be committed soon :)
Sample Code:
LIS2mDL sample program
uint8_t MODR = MODR_100Hz; int16_t temp[3] = {0, 0, 0}; float magBias[3] = {0,0,0}, magScale[3] = {0,0,0}; // Attach interrupt to this pin if you want to use magnetometer sensor interrupt // 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) DigitalIn interruptPin(LIS2MDL_intPin); // The itracker has the LIS2MDL sensor on the 13 and 11 I2C pins I2C i2c(p13,p11); // main() method. Runs in its own thread in the OS int main() { //Create LIS2MDL object LIS2MDL sensor(i2c, LIS2MDL_ADDRESS); //Reset the sensor to ensure correct starting config register values sensor.reset(); wait(3); //Intialise the CHIP with the MODR value chosen sensor.init(MODR); //Test the Chip ID. Should return 64 (0x40) sensor.getChipID(); // Calcaulte the offset bias to be used in future reading. See self check for example usage sensor.offsetBias(magBias, magScale); // Read the internal temp sensor sensor.readTemperature(); //Get readings from the sensor; for(int i=0; i<60; i++) { int16_t temp[3] = {0, 0, 0}; sensor.readData(temp); wait(0.1); } }
Revisions of LIS2MDL.cpp
Revision | Date | Message | Actions |
---|---|---|---|
0:d7138994c637 | 2018-02-12 | LIS2MDL sensor driver for mbed | File Diff Annotate |