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#ifndef CAMINTERFACE_H
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#define CAMINTERFACE_H
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/*
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    Copyright (C) 2004    John Orlando
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   AVRcam: a small real-time image processing engine.
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    This program is free software; you can redistribute it and/or
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    modify it under the terms of the GNU General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    General Public License for more details.
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    You should have received a copy of the GNU General Public
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    License along with this program; if not, write to the Free Software
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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   For more information on the AVRcam, please contact:
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   john@jrobot.net
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   or go to www.jrobot.net for more details regarding the system.
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*/
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/***********************************************************
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	Module Name: CamInterface.h
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	Module Date: 04/14/2004
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	Module Auth: John Orlando
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	Description: This file is responsible for providing the
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	external interface to the CamInterface module.
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    Revision History:
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    Date        Rel Ver.    Notes
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    4/10/2004      0.1     Module created
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    6/30/2004      1.0     Initial release for Circuit Cellar
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                           contest.
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***********************************************************/
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#define NUM_PIXELS_IN_A_TRACKED_LINE 	88
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#define NUM_PIXELS_IN_A_DUMP_LINE    	176
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#define ACTUAL_NUM_PIXELS_IN_A_LINE		176
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#define ACTUAL_NUM_LINES_IN_A_FRAME		144
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#define LENGTH_OF_RUN_LENGTH_BLOCK 2
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#define LENGTH_OF_LINE_BUFFER NUM_PIXELS_IN_A_DUMP_LINE
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#define WAIT_FOR_VSYNC_LOW() 	while( (PIND & 0x04) != 0)
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#define WAIT_FOR_VSYNC_HIGH()	while( (PIND & 0x04) == 0)
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#define WAIT_FOR_HREF_LOW()		while( (PIND & 0x10) != 0)
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#define WAIT_FOR_HREF_HIGH()	while( (PIND & 0x10) == 0)
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#define WAIT_FOR_PCLK_LOW()		while( (PIND & 0x20) != 0)
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#define WAIT_FOR_PCLK_HIGH()	while( (PIND & 0x20) == 0)
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#define NUM_COLOR_STEPS     16
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#define NUM_COLOR_CHANNELS	3
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#define NUM_ELEMENTS_IN_COLOR_MAP (NUM_COLOR_STEPS * NUM_COLOR_CHANNELS)
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#define RED_OFFSET		0
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#define GREEN_OFFSET	16
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#define BLUE_OFFSET		32
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extern unsigned char currentLineBuffer[];
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extern unsigned char previousLineBuffer[];
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extern unsigned char colorMap[];
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extern unsigned char frameCount;
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/* Extern functions */
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extern void CamInt_init(void);
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extern void CamInt_resetCam(void);
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extern void CamInt_waitForNewDumpFrame(void);
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extern void CamInt_waitForNewTrackingFrame(void);
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extern void CamInt_acquireTrackingLine(void);
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extern void CamInt_acquireDumpLine(void);
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#endif	
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