sparkfun ZX Distance and Gesture Sensor Hook-Up Manual page 11

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/*************************************************************
***
I2C_Gesture_Interrupt.ino
XYZ Interactive ZX Sensor
Shawn Hymel @ SparkFun Electronics
May 6, 2015
https://github.com/sparkfun/SparkFun_ZX_Distance_and_Gesture_S
ensor_Arduino_Library
Tests the ZX sensor's ability to read gesture data over I2C us
ing
an interrupt pin. This program configures I2C and sets up an
interrupt to occur whenever the ZX Sensor throws its DR pin hi
gh.
The gesture is displayed along with its "speed" (how long it t
akes
to complete the gesture). Note that higher numbers of "speed"
indicate a slower speed.
Hardware Connections:
Arduino Pin ZX Sensor Board Function
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
5V VCC Power
GND GND Ground
A4 DA I2C Data
A5 CL I2C Clock
2 DR Data Ready
Resources:
Include Wire.h and ZX_Sensor.h
Development environment specifics:
Written in Arduino 1.6.3
Tested with a SparkFun RedBoard
This code is beerware; if you see me (or any other SparkFun
employee) at the local, and you've found our code helpful, ple
ase
buy us a round!
Distributed as­is; no warranty is given.
**************************************************************
**/
#include <Wire.h>
#include <ZX_Sensor.h>
// Constants
const int ZX_ADDR = 0x10; // ZX Sensor I2C address
const int INTERRUPT_NUM = 0; // Pin 2 on the UNO
// Global Variables
ZX_Sensor zx_sensor = ZX_Sensor(ZX_ADDR);
volatile GestureType gesture;
volatile bool interrupt_flag;
uint8_t gesture_speed;
void setup() {
uint8_t ver;
// Initialize gesture to no gesture
gesture = NO_GESTURE;