// Refer to SparkFun ADXL345 Hook Up Guide:
https://learn.sparkfun.com/tutorials/adxl345-hookup-guide
#include <ADXL345.h>
/*********** COMMUNICATION SELECTION ***********/
/* Comment Out The One You Are Not Using */
//ADXL345 adxl = ADXL345(10); // Use when you want to use Hardware SPI, ADXL345(CS_PIN);
ADXL345 adxl = ADXL345(); // Use when you need I2C
/****************** VARIABLES ******************/
/* */
int AccelMinX = 0;
int AccelMaxX = 0;
int AccelMinY = 0;
int AccelMaxY = 0;
int AccelMinZ = 0;
int AccelMaxZ = 0;
int accX = 0;
int accY = 0;
int accZ = 0;
int pitch = 0;
int roll = 0;
/************** DEFINED VARIABLES **************/
/* */
#define offsetX 0 // OFFSET values
#define offsetY 0
#define offsetZ 0
#define gainX 1 // GAIN factors
#define gainY 1
#define gainZ 1
/******************** SETUP ********************/
/* Configure ADXL345 Settings */
void setup()
{
Wire.begin();
Serial.begin(9600); // Start the serial terminal
Serial.println("SparkFun ADXL345 Accelerometer Breakout Calibration");
Serial.println();
adxl.initialize(); // Power on the ADXL345
//adxl.setRangeSetting(2); // Give the range settings
// Accepted values are 2g, 4g, 8g or 16g
// Higher Values = Wider Measurement Range
// Lower Values = Greater Sensitivity
//adxl.setSpiBit(0); // Configure the device to be in 4 wire SPI mode when set to '0' or 3 wire SPI mode when set to 1
// It is set to 1 by Default.
// SPI pins on the ATMega328 as reference in SPI Library are 11, 12, and 13
}
/****************** MAIN CODE ******************/
/* Accelerometer Readings and Min/Max Values */
void loop()
{
Serial.println("Send any character to display values.");
while (!Serial.available()){} // Waiting for character to be sent to Serial
Serial.println();
// Get the Accelerometer Readings
int x,y,z; // init variables hold results
adxl.getAcceleration(&x, &y, &z); // Read the accelerometer values and store them in variables declared above x,y,z
if(x < AccelMinX) AccelMinX = x;
if(x > AccelMaxX) AccelMaxX = x;
if(y < AccelMinY) AccelMinY = y;
if(y > AccelMaxY) AccelMaxY = y;
if(z < AccelMinZ) AccelMinZ = z;
if(z > AccelMaxZ) AccelMaxZ = z;
Serial.print("Accel Minimums: "); Serial.print(AccelMinX); Serial.print(" ");Serial.print(AccelMinY); Serial.print(" "); Serial.print(AccelMinZ); Serial.println();
Serial.print("Accel Maximums: "); Serial.print(AccelMaxX); Serial.print(" ");Serial.print(AccelMaxY); Serial.print(" "); Serial.print(AccelMaxZ); Serial.println();
Serial.println();
/* Note: Must perform offset and gain calculations prior to seeing updated results
/ Refer to SparkFun ADXL345 Hook Up Guide:
https://learn.sparkfun.com/tutorials/adxl345-hookup-guide
/ offsetAxis = 0.5 * (Acel+1g + Accel-1g) // (+1g = 255, -1g = -255 at 2g range setting)!
/ gainAxis = 0.5 * ((Acel+1g - Accel-1g)/1g) */
// UNCOMMENT SECTION TO VIEW NEW VALUES
//accX = (x - offsetX)/gainX; // Calculating New Values for X, Y and Z
//accY = (y - offsetY)/gainY;
//accZ = (z - offsetZ)/gainZ;
//Serial.print("New Calibrated Values: "); Serial.print(accX); Serial.print(" "); Serial.print(accY); Serial.print(" "); Serial.print(accZ);
//Serial.println();
while (Serial.available())
{
Serial.read(); // Clear buffer
}
}
