/*
 * c't-Sim - Robotersimulator fuer den c't-Bot
 * 
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your
 * option) any later version. 
 * This program is distributed in the hope that it will be 
 * useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
 * PURPOSE. See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public 
 * License along with this program; if not, write to the Free 
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307, USA.
 * 
 */

/*! @file 	mouse.h 
 * @brief 	Routinen fuer die Ansteuerung eines optischen Maussensors
 * @author 	Benjamin Benz (bbe@heise.de)
 * @date 	26.12.05
*/

#ifndef mouse_H_
#define mouse_H_

#define ADNS2610					/*!< Welcher Sensortyp? ADNS2610 oder 2620 */
#ifdef ADNS2610	
	/* ADNS2610 */
	#define MOUSE_CONFIG_REG			0x00 /*!< Reset, Power Down, Forced Awake, etc */
	#define MOUSE_STATUS_REG			0x01 /*!< Product ID, Mouse state of Asleep or Awake */
	#define MOUSE_DELTA_Y_REG			0x02 /*!< Y Movement */
	#define MOUSE_DELTA_X_REG			0x03 /*!< X Movement */
	#define MOUSE_SQUAL_REG		 		0x04 /*!< Measure of the number of features visible by the sensor */
	#define MOUSE_MAX_PIXEL_REG			0x05 /*!< Maximum Pixel value in current frame.*/
	#define MOUSE_MIN_PIXEL_REG			0x06 /*!< Minimum Pixel value in current frame.*/
	#define MOUSE_PIXEL_SUM_REG			0x07 /*!< This register is used to find the average pixel value.*/
	#define MOUSE_PIXEL_DATA_REG		0x08 /*!< Actual picture of surface */
	#define MOUSE_SHUTTER_UPPER_REG		0x09 /*!< The sensor adjusts the shutter to keep the average and maximum pixel values within normal operating ranges.*/
	#define MOUSE_SHUTTER_LOWER_REG		0x0A /*!< The sensor adjusts the shutter to keep the average and maximum pixel values within normal operating ranges.*/
	#define MOUSE_INVERSE_PRODUCT_ID_REG	0x11 /*!< Inverse Product ID */
	
	#define MOUSE_CFG_RESET				0x80 /*!< Reset Circuit */
	#define MOUSE_CFG_POWERDOWN			0x40 /*!< Power Down analog Circuit */
	#define MOUSE_CFG_FORCEAWAKE		0x01 /*!< Keep Sensor awake */
	
#else			
	/* ADNS2620 */
	#define MOUSE_CONFIG_REG			0x40 /*!< Reset, Power Down, Forced Awake, etc */
	#define MOUSE_STATUS_REG			0x41 /*!< Product ID, Mouse state of Asleep or Awake */
	#define MOUSE_DELTA_Y_REG			0x42 /*!< Y Movement */
	#define MOUSE_DELTA_X_REG			0x43 /*!< X Movement */
	#define MOUSE_SQUAL_REG		 		0x44 /*!< Measure of the number of features visible by the sensor */
	#define MOUSE_MAX_PIXEL_REG			0x45 /*!< Maximum Pixel value in current frame.*/
	#define MOUSE_MIN_PIXEL_REG			0x46 /*!< Minimum Pixel value in current frame.*/
	#define MOUSE_PIXEL_SUM_REG			0x47 /*!< This register is used to find the average pixel value.*/
	#define MOUSE_PIXEL_DATA_REG		0x48 /*!< Actual picture of surface */
	#define MOUSE_SHUTTER_UPPER_REG		0x49 /*!< The sensor adjusts the shutter to keep the average and maximum pixel values within normal operating ranges.*/
	#define MOUSE_SHUTTER_LOWER_REG		0x4A /*!< The sensor adjusts the shutter to keep the average and maximum pixel values within normal operating ranges.*/
	#define MOUSE_FRAME_PERIOD_REG		0x4B /*!< The frame period counter counts up until it overflows. */
#endif

/*! 
 * Initialisiere Maussensor
 */ 
void maus_sens_init(void);

/*!
 * Schickt ein Lesekommando an den Sensor
 * und liest ein Byte zurueck
 * @param adr die Adresse
 * @return das Datum
 */
uint8 maus_sens_read(uint8 adr);

/*! Stellt sicher, dass der Maussensor nicht mehr die serielle Datenleitung treibt */
#define maus_sens_highZ() 		maus_sens_write(0x77,0x00)

/*!
 * Uebertraegt ein write-Kommando an den Sensor
 * @param adr Adresse
 * @param data Datum
 */
void maus_sens_write(int8 adr, uint8 data);

/*!
 * Liefert bei jedem Aufruf das naechste Pixel des Bildes
 * Insgesamt gibt es 324 Pixel
 * <pre>
 * 18 36 ... 324
 * .. .. ... ..
 *  2 20 ... ..
 *  1 19 ... 307
 * </pre>
 * Bevor diese Funktion aufgerufen wird, muss maus_image_prepare() aufgerufen werden!
 * @return Die Pixeldaten (Bit 0 bis Bit5), Pruefbit, ob Daten gueltig (Bit6), Markierung fuer den Anfang eines Frames (Bit7)
 */
int8 maus_image_read(void);

/*!
 * Bereitet das auslesen eines ganzen Bildes vor
 */
void maus_image_prepare(void);

/*!
 * Gibt den SQUAL-Wert zurueck. Dieser gibt an, wieviele Merkmale der Sensor 
 * im aktuell aufgenommenen Bild des Untergrunds wahrnimmt
 */
uint8 maus_get_squal(void);

#endif