AccelDig Accelerometer Info and Examples

Board Overview:

• LIS3LV02DQ sensor datasheet [PDF]

Sensor Operation:

• NOTE: These steps are meant as a quick quide to getting the sensor running with any controller device.
  If you are using an AVR processor, see the examples below and the LIS3L02 code library provided with AVRlib
• Initialization
1. Check for device ID
   WHO_AM_I: Read this register to verify device is present on the bus. Should read as 0x3A.
2. Enable the device
   CTRL_REG1: set bits PD0, Xen, Yen, Zen
3. Set the sampling decimation rate
   CTRL_REG1: set DF1, DF0 as appropriate for 40, 160, 640, or 2560 Hz sampling
4. Set desired accelerometer scale
   CTRL_REG2: clear/set FS bit for +/-2g or +/-6g range respectively
5. Set data output options
   CTRL_REG2: set BDU and DAS as needed for the application
• Basic Operation
  1. Read acceleration output registers any time
     OUTX_L/H, OUTY_L/H, and OUTZ_L/H
• Nyquist-accurate Operation
  1. Monitor data-ready bits to see if new sample is ready
     STATUS_REG: read and wait for ZYXDA to become '1'
  2. Read acceleration output registers
     OUTX_L/H, OUTY_L/H, and OUTZ_L/H
  3. Goto step 1

Code Examples: **

• Digital Level Example - Basic digital level application using the XL-Dig board (prints raw acceleration values and X,Y angular tilt)

** Note: Examples require a current version of AVRlib available [here].