pointer test

#include <OneWire.h>
#include <Wire.h>
#include <Adafruit_MCP23017.h>
#include <Adafruit_RGBLCDShield.h>


#define oneWireBus 2
byte address[8];
byte *addrP = address;
OneWire oneWire(oneWireBus);

Adafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield();

float temp;
unsigned long lastTime = 0, currentTime = 0;

void setup() {
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  lcd.begin(16, 2);
  lcd.print(F("oneWire temp ptr"));
  Serial.begin(19200);
  delay(1000);
  lcd.clear();
  oneWire.search(addrP);

}

void loop() {
  currentTime = micros();
  temp = getOneWireTemp(addrP);
  lastTime = micros();
  Serial.print(F("temp is: "));
  Serial.print(temp);
  Serial.print(F("C.  It took "));
  Serial.print(lastTime - currentTime);
  Serial.println(F(" ms.")); //takes 9400/474

  currentTime = micros();
  temp = getOneWireTemp2();
  lastTime = micros();
  Serial.print(F("temp2 is: "));
  Serial.print(temp);
  Serial.print(F("C.  It took "));
  Serial.print(lastTime - currentTime);
  Serial.println(F(" ms.")); //takes 9394/474.
  delay(500);
}

float getOneWireTemp(byte *str) { //get OneWire temp.
  byte data[2]; //array to store data retrieved from sensor.
  oneWire.reset();
  oneWire.select(str);
  oneWire.write(0x44, 1); //start conversion.
  oneWire.reset();
  oneWire.select(str);
  oneWire.write(0xBE); //read scratchpad.

  for (byte i = 0; i < 2; i ++) {
    data[i] = oneWire.read(); //collect data.
  } //end for.

  int16_t raw = (data[1] << 8) | data[0]; //convert raw data to C.

  return (float)raw / 16.0;
} //end getOneWireTemp().

float getOneWireTemp2() { //get OneWire temp.
  byte data[2]; //array to store data retrieved from sensor.
  oneWire.reset();
  oneWire.select(addrP);
  oneWire.write(0x44, 1); //start conversion.
  oneWire.reset();
  oneWire.select(addrP);
  oneWire.write(0xBE); //read scratchpad.

  for (byte i = 0; i < 2; i ++) {
    data[i] = oneWire.read(); //collect data.
  } //end for.

  int16_t raw = (data[1] << 8) | data[0]; //convert raw data to C.

  return (float)raw / 16.0;
} //end getOneWireTemp().