This file is included as part of the CANOPNR distribution. 
   You are free to use this project as you see fit, provided credit is given to all 
   contributors (original and subsequent).
   
   Copyright 2012  Jose Denrie Enriquez, Alex Bautista, Paloma Field, Sun-il Kim

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

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   The goal of this tool is to provide open-source software to help
   facilitate other projects that require the use of the
   information available via CAN, with special contributions
   in dealing with ABS-related information (which is not readily
   available from the manufacturers) and the optimiztion for
   accuracy in detection wheel slippage.  The projcet is based on 
   the use of the Arduino Uno unit along with a CAN-Bus unit and a GPRS shield.  
   The implementation can be modified to adapt to the needs of individual 
   projects with due credit given to the original project(s) and authors.
   
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Note: Since the original MCP2515 Library was created by Frank Kienast, it has been 
modified for use in the CANOPNR (CAN-OBD Programmable-expandable Network-enabled Reader)
for remotely collecting vehicular parameters via CAN.

The modifications include:
(1) CANOPNR_MCP2525.cpp 
  -Added 7 new methods:
     1. boolean MCP2515::setSleepMode()
     2. boolean MCP2515::isAwake()
     3. boolean MCP2515::getMSG(CANMSG *msg, unsigned long timeout, unsigned long message_addr)
     4. boolean MCP2515::SNIFF_ALL(CANMSG *msg)
     5. boolean MCP2515::CANSNIFF(CANMSG *msg, unsigned short address, unsigned long timeout)
     6. boolean MCP2515::receiveCANMessage(CANMSG *msg, unsigned long timeout)
     7. long MCP2515::queryOBD(unsigned char pid, char *buffer)
  -Modified 1 existing method:
     1. boolean MCP2515::setCANNormalMode()

(2) CANOPNR_MCP2525.h
  -Modified 1 existing class:
     1. class MCP2515