Adxl345 Class Reference

API for the ADXL345 3-Axis Digital Accelerometer. More...

Detailed Description

• ID: adxl345
• Name: 3-axis, +/- 2/4/8/16 g Digital Accelerometer
• Other Names: Grove 3-Axis Digital Accelerometer (16g)
• Category: accelerometer
• Manufacturer: seeed
• Connection: i2c
• Link: http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf

ADXL345 is a 3-axis digital accelerometer. (http://www.seeedstudio.com/wiki/images/2/2c/ADXL345_datasheet.pdf) The sensor has configurable resolutions to measure +/- 2g, +/- 4g, +/- 8g, or +/- 16g. Note: The Grove* version of the sensor is incompatible with and not detected on the I2C bus by the Intel(R) Edison using an Arduino* breakout board at 5V (3V works fine).

    int16_t* raw;
    float* acc;

    // Note: Sensor only works at 3.3V on the Intel Edison with Arduino breakout
    upm::Adxl345 accel(0);

    while (true) {
        accel.update();                // Update the data
        raw = accel.getRawValues();    // Read raw sensor data
        acc = accel.getAcceleration(); // Read acceleration (g)
        fprintf(stdout, "Current scale: 0x%2xg\n", accel.getScale());
        fprintf(stdout, "Raw: %6d %6d %6d\n", raw[0], raw[1], raw[2]);
        fprintf(stdout, "AccX: %5.2f g\n", acc[0]);
        fprintf(stdout, "AccY: %5.2f g\n", acc[1]);
        fprintf(stdout, "AccZ: %5.2f g\n", acc[2]);
        upm_delay(1);
    }

Public Member Functions
	Adxl345 (int bus)
float *	getAcceleration ()
int16_t *	getRawValues ()
uint8_t	getScale ()
mraa::Result	update ()

Constructor & Destructor Documentation

Adxl345

(

int

bus

)

Creates an ADXL345 object

Parameters

bus	Number of the used I2C bus

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Member Function Documentation

float * getAcceleration

(

)

there is no need for a ADXL345 object destructor ~Adxl345(); Returns a pointer to a float[3] that contains acceleration (g) forces

Returns

float* to a float[3]

int16_t * getRawValues

(

)

Returns a pointer to an int[3] that contains the raw register values for X, Y, and Z

Returns

int* to an int[3]

uint8_t getScale

(

)

Returns the scale the accelerometer is currently set up to: 2, 4, 8, or 16

Returns

uint with the current scale value

mraa::Result update

(

void

)

Updates the acceleration values from the I2C bus

Returns

0 if successful

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The documentation for this class was generated from the following files:

• src/adxl345/adxl345.hpp
• src/adxl345/adxl345.cxx