Hey everyone.
I've been playing around with the Sparkfun Gesture Sensor, but I seem to run into an issue. There are certain cases where after the sensor reads a gesture (INT Pin falling from ~3V to 0V), the INT pin stays at 0V, which prevents it from reading anymore gestures. I've tried unattaching and reattaching the pin after each interrupt, but this does seem to work either. Anyone one have an idea of why the INT pin stays stuck at low?
/****************************************************************
GestureTest.ino
APDS-9960 RGB and Gesture Sensor
Shawn Hymel @ SparkFun Electronics
May 30, 2014
https://github.com/sparkfun/APDS-9960_RGB_and_Gesture_Sensor
Tests the gesture sensing abilities of the APDS-9960. Configures
APDS-9960 over I2C and waits for gesture events. Calculates the
direction of the swipe (up, down, left, right) and displays it
on a serial console.
To perform a NEAR gesture, hold your hand
far above the sensor and move it close to the sensor (within 2
inches). Hold your hand there for at least 1 second and move it
away.
To perform a FAR gesture, hold your hand within 2 inches of the
sensor for at least 1 second and then move it above (out of
range) of the sensor.
Hardware Connections:
IMPORTANT: The APDS-9960 can only accept 3.3V!
Arduino Pin APDS-9960 Board Function
3.3V VCC Power
GND GND Ground
A4 SDA I2C Data
A5 SCL I2C Clock
2 INT Interrupt
Resources:
Include Wire.h and SparkFun_APDS-9960.h
Development environment specifics:
Written in Arduino 1.0.5
Tested with SparkFun Arduino Pro Mini 3.3V
This code is beerware; if you see me (or any other SparkFun
employee) at the local, and you've found our code helpful, please
buy us a round!
Distributed as-is; no warranty is given.
****************************************************************/
#include <Wire.h>
#include <SparkFun_APDS9960.h>
// Pins
#define APDS9960_INT 2 // Needs to be an interrupt pin
// Constants
// Global Variables
SparkFun_APDS9960 apds = SparkFun_APDS9960();
int isr_flag = 0;
char state;
int i = 0;
void setup() {
// Set interrupt pin as input
pinMode(APDS9960_INT, INPUT);
pinMode(9, OUTPUT);
// Initialize Serial port
Serial.begin(9600);
Serial.println();
Serial.println(F("--------------------------------"));
Serial.println(F("SparkFun APDS-9960 - GestureTest"));
Serial.println(F("--------------------------------"));
// Initialize interrupt service routine
attachInterrupt(0, interruptRoutine, FALLING);
// Initialize APDS-9960 (configure I2C and initial values)
if ( apds.init() ) {
Serial.println(F("APDS-9960 initialization complete"));
} else {
Serial.println(F("Something went wrong during APDS-9960 init!"));
}
// Start running the APDS-9960 gesture sensor engine
if ( apds.enableGestureSensor(true) ) {
Serial.println(F("Gesture sensor is now running"));
} else {
Serial.println(F("Something went wrong during gesture sensor init!"));
}
state = 'R';
}
void loop() {
/*
//Test 1 Case Statement
switch (state){
case 'R':
if( isr_flag == 1 ) {
detachInterrupt(0);
handleGesture();
digitalWrite(9, HIGH);
delay(5000);
isr_flag = 0;
Serial.println("STATE R");
state= 'X';
attachInterrupt(0, interruptRoutine, FALLING);
break;
}
//Serial.println("delay");
digitalWrite(9, LOW);
case 'X':
if (isr_flag == 1) {
detachInterrupt(0);
handleGesture();
digitalWrite(9, HIGH);
delay(5000);
Serial.println("STATE X");
isr_flag=0;
state = 'R';
attachInterrupt(0, interruptRoutine, FALLING);
break;
}
attachInterrupt(0, interruptRoutine, FALLING);
digitalWrite(9, LOW);
}
*/
//TEST 2
Serial.println("Loop Again");
Serial.println(i);
//delay(1000);
if (isr_flag == 1){
detachInterrupt(0);
delay(1000);
attachInterrupt(0, interruptRoutine, FALLING);
digitalWrite(9,HIGH);
i -= 1;
digitalWrite(9,LOW);
isr_flag=0;
}
i += 1;
}
void interruptRoutine() {
isr_flag = 1;
}
void handleGesture() {
if ( apds.isGestureAvailable() ) {
switch ( apds.readGesture() ) {
case DIR_UP:
Serial.println("UP");
break;
case DIR_DOWN:
Serial.println("DOWN");
break;
case DIR_LEFT:
Serial.println("LEFT");
break;
case DIR_RIGHT:
Serial.println("RIGHT");
break;
case DIR_NEAR:
Serial.println("NEAR");
break;
case DIR_FAR:
Serial.println("FAR");
break;
default:
Serial.println("NONE");
}
}
}