Lanner LVC-5770 - Manual (Page 40)

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Accessing the Digital Accelerometer
Appendix C
Embedded and Industrial Computing
Appendix C:
Accessing the Digital
Accelerometer Data from
the LVC-5770
The system employs Analog Devices’s ADXL345 Digital
Accelerometer which is a small, thin, ultralow power, 3-axis
accelerometer with high resolution (13-bit) measurement
at up to ±16 g. It interfaces with the LVC-5770 through a
SPI interface.
Driver Installation
To access the G-Sensor data, use the following
instructions:
Make sure you already installed the Lanner GPIO driver on
your LVC-5770 as instructed in Appendix B.
To access the Gsensor data, locate the adxl345_v001 folder
and execute the executable file adxl345 and it will show G
value of 3 axes.
A sample program in C:++
// main.cpp
// The adxl345.exe utility shows the 3 axis G value.
//
// History:
//
07/15/2011: Initial version
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#include “ich7.h”
#include “adxl345.h”
void adxl345_init()
{
ich7_SM_WriteByte (0x1D, POWER_CTL, ACT_INACT_
SERIAL | MEASURE) ; // Power CTL:
Measure mode, Activity and Inactivity Serial
ich7_SM_WriteByte (0x1d, BW_RATE, RATE_100);
/ /
Output Data Rate: 100Hz
ich7_SM_WriteByte (0x1d, DATA_FORMAT, FULL_
RESOLUTION | DATA_JUST_LEFT | RANGE_16G);
/ /
Data Format: 16g range, right justified, 256->1g
}
int main(int argc, char* argv[])
{
adxl345_init () ;