MMA8452Q_FreqTest.ino

#include <Wire.h> // Must include Wire library for I2C

#include <SparkFun_MMA8452Q.h>
MMA8452Q accel(0x1D); // Initialize the MMA8452Q with an I2C address of 0x1C (SA0=0)

void setup()
{
  Serial.begin(115200);
  Serial.println("MMA8452Q Test Code!");

  accel.init(SCALE_8G, ODR_800);

  //Wire.setClock(400000); //Fast I2C
}

long lastPrint = millis();

void loop()
{
  if (accel.available())
  {
    accel.read();
    printCalculatedAccels();

    Serial.print(" Hz: ");
    Serial.print(1000 / (millis() - lastPrint));

    Serial.println(); // Print new line every time.

    lastPrint = millis();
  }
}

void printCalculatedAccels()
{
  Serial.print(accel.cx, 3);
  Serial.print("\t");
  Serial.print(accel.cy, 3);
  Serial.print("\t");
  Serial.print(accel.cz, 3);
  Serial.print("\t");
}