 
 #include <SPI.h>
 #include <SD.h>
+#include <WSWire.h>
 
 #define ENGINE_PULSES_PER_REVOLUTION 3
 #define WHEEL_PULSES_PER_REVOLUTION 5
 
+#define GEAR_RATIO_OFFSET 0.1
+
 #define TIME_LAPSE 100
+
+#define I2C_ADDRESS 4
 
 volatile byte engine_pulses;
 volatile byte wheel_pulses;
 
 unsigned int engine_rpm;
 unsigned int wheel_rpm;
-float ratio;
+unsigned int ratio;
+unsigned int gear_ratio_table[6]; // ratio values for each gear
 
 unsigned long lastmillis;
 
 File file;
+
+
+uint8_t i2c_values[6];
+
 
 void setup() {
   Serial.begin(9600);


    engine_rpm = (60/ENGINE_PULSES_PER_REVOLUTION)*1000/(current_time_lapse) * engine_pulses;
    wheel_rpm = (60/WHEEL_PULSES_PER_REVOLUTION)*1000/(current_time_lapse) * wheel_pulses;
    ratio = engine_rpm/wheel_rpm;
    engine_pulses = 0;
    wheel_pulses = 0;


* Could be used alone or with Arduino DataLogger
* Some information about interrupts:
* - http://arduino.cc/en/Reference/attachInterrupt
* About I2C:
$ - WSWireLib: https://github.com/steamfire/WSWireLib
* About SD Cards:
* - https://learn.adafruit.com/adafruit-micro-sd-breakout-board-card-tutorial/format
* Some useful information about Aprilia RSV/SL bikes work: (See: http://www.aprilia-v60.com/index.php?topic=262315)
