/**************************************************************************************************
---------------------------------------------------------------------------------------------------
	Copyright (c) 2004, Jonathan Bagg
	All rights reserved.

	 Redistribution and use in source and binary forms, with or without modification, are permitted 
	 provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of 
	  conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of 
	  conditions and the following disclaimer in the documentation and/or other materials provided 
	  with the distribution.
    * Neither the name of Jonathan Bagg nor the names of its contributors may be used to 
	  endorse or promote products derived from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR 
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------------------------------
   Project name : Infidigm AVR Drivers
   Processor	: ATMega64, ATMega128
   File name    : adc.h
---------------------------------------------------------------------------------------------------
   Modifications: 

   Revision 1.0  2004/06/11 	Bagg
   - Cleaned up for release
   
   Revision 1.1  2004/12/15 	Bagg
   - Filter Size Definition made more understandable
---------------------------------------------------------------------------------------------------
   Created      : 20 January 2004                Author(s) : Jonathan Bagg
---------------------------------------------------------------------------------------------------
   Analog-to-Digital Peripheral Interrupt Based Driver
---------------------------------------------------------------------------------------------------
**************************************************************************************************/

/**************************************************************************************************
*   ADC Channel Definitions
**************************************************************************************************/
#define	CH0			0		
#define	CH1			1	   	
#define	CH2			2		
#define	CH3			3		
#define	CH4			4		
#define	CH5			5		
#define	CH6			6		
#define	CH7			7		
#define NUM_OF_CHS	8

/**************************************************************************************************
*   ADC Channel Rolling Average Filter Size Definition 
**************************************************************************************************/
#define FLTRSIZE	4		//can be 1,2,4,8,16,32

/**************************************************************************************************
*
*   Signal	          : SIG_ADC
*
*   Description       : ADC Interrupt Service Routine.  Samples each ADC Channel sequentially per 
*						Interrupt.  Fills array 'ad[]' sequentially with the data until full and 
*						then begins to write over the data.
*
*   Parameters        : None
*
*   Functions Called  : None
*
*   Returns           : None
*
**************************************************************************************************/

/**************************************************************************************************
*
*   Function          : startADC
*
*   Description       : Sets the ADC Refference voltage, Enables the ADC, and Enables the ADC 
*						Interrupt
*
*   Parameters        : None
*
*   Functions Called  : None
*
*   Returns           : None
*
**************************************************************************************************/
void startADC(void);

/**************************************************************************************************
*
*   Function          : readadc
*
*   Description       : Performs a rolling average on the data sampled for a specific ADC channel
*
*   Parameters        : ADC channel / Anolog Object
*
*   Functions Called  : None
*
*   Returns           : ADC channel rolling average
*
**************************************************************************************************/
signed int readadc(unsigned char ch);