nRF51-DK + GME605 Orientation Demo

Requirements

• nRF51-DK
• nRF51 SDK: tested with Version 10.0.0
• GCC ARM embedded compiler: tested with gcc-arm-none-eabi-4_9-2015q1-20150306
• GME605 or (GMA303 + GMC303)

I2C Connections

• Use I2C0
  • SCL: P0.07
  • SDA: P0.30
• Accelerometer (GMA303) I2C 7-bit slave address: 0x18
• Magnetometer (GMC303) I2C 7-bit slave address: 0x0C

Makefile

• Modify the location of the SDK to your actual directory

#
# The base directory for nRF51 SDK
#
nRF51_SDK_ROOT := /C/Data/nRF51_SDK/V10_0_0

• Modify the location of the GNU tools to your actual directory

GNU_INSTALL_ROOT := C:/Program Files (x86)/GNU Tools ARM Embedded/4.9 2015q1

• Execute make all to build and flash the program

• Exectute make help for available targets

Sensor Layout Pattern

Sensor layout pattern is defined by the following macro in the "main.c"

#define MAG_LAYOUT_PATTERN          PAT1                 //magnetometer layout pattern
#define ACC_LAYOUT_PATTERN          PAT6                 //accelerometer layout pattern

Please refer to the "Sensor_Layout_Pattern_Definition.pdf" document for the definition and modify accordingly to fit your actual layout.

Usage of AutoNil

• The program will do an offset AutoNil when executed. Hold the g-sensor steady and maintain in level, then press 'y' after the program prompt for input.
• You may change the DATA_AVE_NUM macro in the gSensor_autoNil.h for the moving averae order for the offset estimation. Defautl is 32.

Debug print

To enable debug output, uncomment the following macro in "akmdfs/AKFS_Log.h" and rebuild the project.

//#define ENABLE_AKMDEBUG	1

AKMDFS Library

The AKMDFS demo library is adapted from Compass Control Program for Android Open Source Project.