I have an Intel Tiny Tile boardThis board is based on the Intel Curie, and can be read in Arduino as an Arduino 101.
I'm using this board's accelerometer to register the bounce of someone on a trampoline. I have it set up to write HIGH to a digital pin when its direction changes from negative to positive. That sketch is below - and works well on its own - I've tested it with the serial monitor.
I now want this pin to connect to a pin on an Arduino Mega. I wired the Tiny Tile pin 13 to a protoboard, and joined that protoboard connection with another that wires to the ATMega PIN 8. I'm reading for a HIGH state on the ATMega Pin 8. That sketch is included below as well, with a diagram of the wiring.
When I run the Mega sketch, I don't ever get anything printed to the serial monitor. I'm not sure what I'm doing wrong. Does anyone have any ideas?
Both boards are grounded, and I've tried powering the TinyTile both from the Mega's 3.3V port, and from its own power supply (seems to be getting power - green light is on).
At someone's advice, I connected a multimeter to the mega's ground, and to a pin in the breadboard between the tinytile's output wire (from pin 13), and the mega's input wire (leading to mega pin 8) - and got no voltage when shaking the accelerometer.
TinyTile Sketch:
#include "CurieIMU.h"
float lastZ = 0;
float curZ = 0;
boolean isBounced = false;
int bounceCount = 0;
unsigned long time_now = 0;
int bounceTime = 500;
const int LEDPIN = 13;
boolean doSerial = false;
void setup() {
if (doSerial) {
Serial.begin(9600); // initialize Serial communication
while (!Serial); // wait for the serial port to open
//initialize device
Serial.println("Initializing IMU device...");
}
CurieIMU.begin();
// Set the accelerometer range to 2G
CurieIMU.setAccelerometerRange(2);
pinMode(LEDPIN, OUTPUT);
digitalWrite(LEDPIN,LOW);
}
void loop() {
float ax, ay, az; //scaled accelerometer values
// read accelerometer measurements from device, scaled to the configured range
CurieIMU.readAccelerometerScaled(ax, ay, az);
// display tab-separated accelerometer x/y/z values
lastZ = curZ;
curZ = az;
if (lastZ < 0 && curZ > 0 && !isBounced) {
bounceCount++;
time_now = millis();
isBounced = true;
//if (bounceCount % 2 == 0){
if (doSerial) {
Serial.println(az);
}
digitalWrite(LEDPIN, HIGH);
//}
} else {
digitalWrite(LEDPIN, LOW);
}
if ((millis() > time_now + bounceTime) && isBounced) {
isBounced = false;
time_now = millis();
}
}
Mega Sketch:
//LED PINS
const int LEDPIN = 8;
boolean doSerial = true;
void setup() {
if (doSerial){
Serial.begin(9600);
while (!Serial); // wait for the serial port to open
Serial.println("initialized");
}
pinMode(LEDPIN, INPUT);
}
void loop() {
int ledVal = digitalRead(LEDPIN);
if (ledVal == HIGH){
if (doSerial){
Serial.println("bounce");
}
}
}
