Adxl345 Class Reference

C++ API for Adxl345 (3-axis digital accelerometer) More...

Detailed Description

• ID: adxl345
• Name: Adxl345 3-Axis Digital Accelerometer
• Category: accelerometer
• Manufacturer: seeed
• Connection: i2c

The Adxl345 is a 3-axis digital accelerometer. (http://www.seeedstudio.com/wiki/images/2/2c/ADXL345_datasheet.pdf) The sensor has configurable resolutions for measuring ±2g, ±4g, ±8g or ±16g. Note that the sensor it is incompatible and will not be detected on the I2C bus by the Intel Edison using the Arduino breakout board at 5V (3V3 will work fine).

    int16_t *raw;
    float *acc;

    // Note: Sensor only works at 3.3V on the Intel Edison with Arduino breakout
    upm::Adxl345* accel = new upm::Adxl345(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]);
        sleep(1);
    }

Public Member Functions
	Adxl345 (int bus)
	~Adxl345 ()
float *	getAcceleration ()
int16_t *	getRawValues ()
uint8_t	getScale ()
mraa_result_t	update ()

Constructor & Destructor Documentation

Adxl345

(

int

bus

)

Creates an Adxl345 object

Parameters

bus	number of used i2c bus

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~Adxl345

(

)

Adxl345 object destructor

Member Function Documentation

float * getAcceleration

(

)

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 current scale value

mraa_result_t update

(

void

)

Updates the acceleration values from i2c bus

Returns

0 for success

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

• /var/lib/jenkins/workspace/upm-doc-stable/src/adxl345/adxl345.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/adxl345/adxl345.cxx