/*
 * max7456Registers.h
 *
 *  Created on: 13 oct. 2012
 *      Author: Benoit
 */

#ifndef MAX7456REGISTERS_H_
#define MAX7456REGISTERS_H_


#include <Arduino.h>


/**
 * @typedef charact
 * @brief Represents a character as stored in max7456 character memory.
 */
typedef byte charact[54];

#define VM0_ADDRESS_WRITE 0x00
#define VM0_ADDRESS_READ 0x80

/**
 * @union REG_VM0
 * @brief Represents a Video Mode 0 Register value
 */
union REG_VM0
{
	/**@brief The whole value*/
	unsigned char whole ;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Video BUffer Enable
		 * @li 0 = Enable
		 * @li 1 = Disable(VOUT is high impedance)
		 */
		unsigned char videoBuffer :1;

		/**@brief Software Reset Bit
		 * @li When bit set all register are set to default.
		 */
		unsigned char softwareResetBit : 1;

		/**@brief Vertical Synchronization of On-Screen Data
		 * @li 0 = Enable osd immediately
		 * @li 1 = Enable osd at the next ~VSYNC
		 */
		unsigned char verticalSynch : 1;

		/**@brief Enable Display of OSD Image
		 * @li 0 = Off
		 * @li 1 = On
		 */
		unsigned char enableOSD : 1;

		/**@brief Synch Select Mode
		 * @li 0x (0 ou 1) = Autosynch select
		 * @li 10 (2) = external
		 * @li 11 (3) = internal
		 */
		unsigned char synchSelect : 2;

		/**@brief Video Standard Select
		 * @li 0 = NTSC
		 * @li 1 = PAL
		 */
		unsigned char videoSelect :1;

		/**@brief don't care*/
		unsigned char unused : 1;

	} bits;
};


#define VM1_ADDRESS_WRITE 0x01
#define VM1_ADDRESS_READ 0x81

/**@union REG_VM1
 * @brief Represents a Video Mode 1 Register value.
 */
union REG_VM1
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{

		/**@brief Blinking Duty Cycle (On:Off)
		 * @li b00 (0) = BT:BT
		 * @li b01 (1) = BT:(2*BT)
		 * @li b10 (2) = BT:(3*BT)
		 * @li b11 (3) = (3*BT):BT
		 */
		unsigned char blinkingDutyCycle : 2;


		/**@brief Blinking Time (BT)
		 * @li b00 (0) = 2 fields (NTSC = 33ms ; PAL = 40ms)
		 * @li b01 (1) = 4 fields (NTSC = 67ms ; PAL = 80ms)
		 * @li b10 (2) = 6 fields (NTSC = 100ms ; PAL = 120ms)
		 * @li b11 (3) = 8 fields (NTSC = 133ms ; PAL = 160ms)
		 */
		unsigned char blinkingTime : 2;


		/**@brief Background Mode Brightness
		 * @li b000 (0) = 0%
		 * @li b001 (1) = 7%
		 * @li b010 (2) = 14%
		 * @li b011 (3) = 21%
		 * @li b100 (4) = 28%
		 * @li b101 (5) = 35%
		 * @li b110 (6) = 43%
		 * @li b111 (7) = 49%
		 */
		unsigned char backgroundModeBrightness : 3;

		/**@brief Background Mode
		 * @li 0 = DMM[5] & DMM[7] sets the state of each character background
		 * @li 1 = Sets all displayed background pixel to gray
		 */
		unsigned char backgroundMode : 1;
	} bits;
};

#define HOS_ADDRESS_WRITE 0x02
#define HOS_ADDRESS_READ 0x82

/**@union REG_HOS
 * @brief Represents a Horizontal Offset Register value.
 */
union REG_HOS
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Vertical Position Offset
		 * @li b00 0000 (0) = Farthest left (-32 pixels)
		 * @li .
		 * @li .
		 * @li b10 0000 (32) = No horizontal offset
		 * @li .
		 * @li .
		 * @li b11 1111 (31) = Farthest right (+31pixels)
		 */
		unsigned char horizontalPositionOffset : 6;

		/**@brief Don't care*/
		unsigned char unsused : 2;

	} bits;
};


#define VOS_ADDRESS_WRITE 0x03
#define VOS_ADDRESS_READ 0x83

/**@union REG_VOS
 * @brief Represents a Vertical Offset Register value.
 */
union REG_VOS
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Vertical Position Offset
		 * @li b0 0000 (0) = Farthest up (+16 pixels)
		 * @li .
		 * @li .
		 * @li b1 0000 (16) = No vertical offset
		 * @li .
		 * @li .
		 * @li b1 1111 (31) = Farthest down (-15 pixels)
		 */
		unsigned char verticalPositionOffset : 5;
		/**@brief Don't care*/
		unsigned char unsused : 3;

	} bits;
};

#define DMM_ADDRESS_WRITE 0x04
#define DMM_ADDRESS_READ 0x84
/**@union REG_DMM
 * @brief Represents a Display Memory Mode value.
 */
union REG_DMM
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Auto-Increment Mode
		 * @li 0 = Disabled
		 * @li 1 = Enabled
		 * @note When this bit is enabled for the first time, data in the Display Memory Address (DMAH[0] and
		DMAL[7:0]) registers are used as the starting location to which the data is written. When performing
		the auto-increment write for the display memory, the 8-bit address is internally generated, and
		therefore only 8-bit data is required by the SPI-compatible interface (Figure 21). The content is to
		be interpreted as a Character Address byte if DMAH[1] = 0 or a Character Attribute byte if
		DMAH[1] = 1. This mode is disabled by writing the escape character 1111 1111.
		If the Clear Display Memory bit is set, this bit is reset internally.
		 */
		unsigned char autoIncrementMode : 1;
		/**@brief Vertical Sync Clear (Valid only when clear display memory = 1, (DMM[2] = 1) )
		 * @li 0 = Immediately applies the clear display-memory command, DMM[2] = 1
		 * @li 1 = Applies the clear display-memory command, DMM[2] = 1, at the next VSYNC time
		 */
		unsigned char verticalSynchClear : 1;
		/**@brief Clear Display Memory
		 * @li 0 = Inactive
		 * @li 1 = Clear (fill all display memories with zeros)
		 * @note This bit is automatically cleared after the operation is completed (the operation requires
		 * 20us). The user does not need to write a 0 afterwards. The status of the bit can be checked by
		 * reading this register.
		 * This operation is automatically performed:
		 * a) On power-up
		 * b) Immediately following the rising edge of RESET
		 * c) Immediately following the rising edge of CS after VM0[1] has been set to 1
		 */
		unsigned char clearDisplayMemory : 1;
		/**@brief Invert Bit (applies to characters written in 16-bit operating mode)
		 * @li 0 = Normal (white pixels display white, black pixels display black)
		 * @li 1 = Invert (white pixels display black, black pixels display white)
		 */
		unsigned char INV : 1;
		/**@brief Blink Bit (applies to characters written in 16-bit operating mode)
		 * @li 0 = Blinking off
		 * @li 1 = Blinking on
		 * @note Blinking rate and blinking duty cycle data in the Video Mode 1 (VM1) register are used for blinking control
		 */
		unsigned char BLK : 1;
		/**@brief Local Background Control Bit (applies to characters written in 16-bit operating mode)
		 * @li 0 = sets the background pixels of the character to the video input (VIN) when in external sync mode.
		 * @li 1 = sets the background pixels of the character to the background mode brightness level defined by VM1[6:4] in external or internal sync mode.
		 * @note In internal sync mode, the local background control bit behaves as if it is set to 1
		 */
		unsigned char LBC : 1;
		/**@brief Operation Mode Selection
		 * @li 0 = 16-bit operation mode
		 * @li 1 = 8-bit operation mode
		 */
		unsigned char operationModeSelection : 1;

		/**@brief Don't care*/
		unsigned char unsused : 1;



	} bits;
};


#define DMAH_ADDRESS_WRITE 0x05
#define DMAH_ADDRESS_READ 0x85
/**@union REG_DMAH
 * @brief Represents a Display Memory Address High Register value
 */
union REG_DMAH
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief 8th bit for Display Memory Address.
		 */
		unsigned char DisplayMemoryAdressBit8 : 1;
		unsigned char byteSelectionBit : 1;
		/**@brief Don't care*/
		unsigned char unsused : 6;
	} bits;
};


#define DMAL_ADDRESS_WRITE 0x06
#define DMAL_ADDRESS_READ 0x86
typedef unsigned char REG_DMAL;


#define DMDI_ADDRESS_WRITE 0x07
#define DMDI_ADDRESS_READ 0x87
typedef unsigned char REG_DMDI;

#define CMM_ADDRESS_WRITE 0x08
#define CMM_ADDRESS_READ 0x88
typedef unsigned char REG_CMM;

#define CMAH_ADDRESS_WRITE 0x09
#define CMAH_ADDRESS_READ 0x89

/**@typedef REG_CMAH
 * @brief Represents a Character Memory Address HIGH value
 */
typedef unsigned char REG_CMAH;

#define CMAL_ADDRESS_WRITE 0x0A
#define CMAL_ADDRESS_READ 0x8A
/**@typedef REG_CMAL
 * @brief Represents a Character Memory Address Low value
 */
typedef unsigned char REG_CMAL;

#define CMDI_ADDRESS_WRITE 0x0B
#define CMDI_ADDRESS_READ 0x8B

/**@union REG_CMDI
 * @brief Represents a Character Memory Data In Register value
 */
union REG_CMDI
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{

		/**@brief value of the right most pixel*/
		unsigned char rightMostPixel : 2;

		/**@brief value of the right center pixel*/
		unsigned char rightCenterPixel : 2;

		/**@brief value of the left center pixel*/
		unsigned char leftCenterPixel : 2;

		/**@brief value of the left most pixel*/
		unsigned char leftMostPixel : 2;

	} bits;
};


#define OSDM_ADDRESS_WRITE 0x0C
#define OSDM_ADDRESS_READ 0x8C

/**@union REG_OSDM
 * @brief Represents an OSD Insersion Mux Register value
 */
union REG_OSDM
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits
	 * */
	struct
	{
		/**@brief OSD Insersion Mux Switching Time
		 * @li b000 (0) : 30ns (maximum sharpness/maximum crosscolor artifacts )
		 * @li b001 (1) : 35ns
		 * @li b010 (2) : 50ns
		 * @li b011 (3) : 75ns
		 * @li b100 (4) : 100ns
		 * @li b101 (5) : 120ns (minimum sharpness/minimum crosscolor artifacts)
		 */
		unsigned char osdInsertionMuxSwitchingTime : 3;


		/**@brief OSD Rise And Fall Time
		 * @li b000 (0) : 20ns (maximum sharpness/maximum crosscolor artifacts )
		 * @li b001 (1) : 30ns
		 * @li b010 (2): 35ns
		 * @li b011 (3) : 60ns
		 * @li b100 (4) : 80ns
		 * @li b101 (5) : 110ns (minimum sharpness/minimum crosscolor artifacts)
		 */
		unsigned char osdRiseAndFallTime : 3;


		/**@brief don't care*/
		unsigned char unused : 2;

	} bits;
};


#define RB0_ADDRESS_WRITE 0x10
#define RB0_ADDRESS_READ 0x90

#define RB1_ADDRESS_WRITE 0x11
#define RB1_ADDRESS_READ 0x91

#define RB2_ADDRESS_WRITE 0x12
#define RB2_ADDRESS_READ 0x92

#define RB3_ADDRESS_WRITE 0x13
#define RB3_ADDRESS_READ 0x93

#define RB4_ADDRESS_WRITE 0x14
#define RB4_ADDRESS_READ 0x94

#define RB5_ADDRESS_WRITE 0x15
#define RB5_ADDRESS_READ 0x95

#define RB6_ADDRESS_WRITE 0x16
#define RB6_ADDRESS_READ 0x96

#define RB7_ADDRESS_WRITE 0x17
#define RB7_ADDRESS_READ 0x97

#define RB8_ADDRESS_WRITE 0x18
#define RB8_ADDRESS_READ 0x98

#define RB9_ADDRESS_WRITE 0x19
#define RB9_ADDRESS_READ 0x99

#define RBA_ADDRESS_WRITE 0x1A
#define RBA_ADDRESS_READ 0x9A

#define RBB_ADDRESS_WRITE 0x1B
#define RBB_ADDRESS_READ 0x9B

#define RBC_ADDRESS_WRITE 0x1C
#define RBC_ADDRESS_READ 0x9C

#define RBD_ADDRESS_WRITE 0x1D
#define RBD_ADDRESS_READ 0x9D

#define RBE_ADDRESS_WRITE 0x1E
#define RBE_ADDRESS_READ 0x9E

#define RBF_ADDRESS_WRITE 0x1F
#define RBF_ADDRESS_READ 0x9F

/**@union REG_RBN
 * @brief Represents a Row Brithness Register value (15 of them)
 */
union REG_RBN
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Character white level
		 * @li b00 (0) = 120%
		 * @li b01 (1) = 100%
		 * @li b10 (2) = 90%
		 * @li b11 (3) = 80%
		 */
		unsigned char characterWhiteLevel : 2;

		/**@brief Character black level
		 * @li b00 (0) = 0%
		 * @li b01 (1) = 10%
		 * @li b10 (2) = 20%
		 * @li b11 (3) = 20%
		 */
		unsigned char characterBlackLevel : 2;

		/**@brief don't care*/
		unsigned char unused : 4;
	} bits;
};

#define OSDBL_ADDRESS_WRITE 0x6C
#define OSDBL_ADDRESS_READ 0xEC

/**@union REG_OSDBL
 * @brief Represents an OSD Black Level Register value
 */
union REG_OSDBL
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief do not change those bits : factory preset*/
		unsigned char doNotChange : 4;
		/**@brief OSD Image Black Level Control.
		 * @li 0 = automatic.
		 * @li 1 = manual.
		 */
		unsigned char osdImageBlackLevelControl : 1;

		/**@brief don't care*/
		unsigned char unused : 3;
	} bits;
};

#define STAT_ADDRESS_READ 0xA0 //Read only

/**@union REG_STAT
 * @brief Represents a Status Register value
 */
union REG_STAT
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief Detected PAL.
		 * @li 0 = PAL signal is not detected ad VIN.
		 * @li 1 = PAL signal is detected at VIN.
		 */
		unsigned char PALDetected : 1;
		/**@brief Detected NTSC.
		 * @li 0 = NTSC signal is not detected ad VIN.
		 * @li 1 = NTSC signal is detected at VIN.
		 */
		unsigned char NTSCDetected : 1;
		/**@brief Loos-Of-Sync.
		 * @li 0 = Sunc Active. Asserted after 32 consecutive input video lines.
		 * @li 1 = No Sync. Asserted after 32 consecutive missing input video lines.
		 */
		unsigned char LOS : 1;
		/**@brief ~HSYNC Ouput Level.
		 * @li 0 = Active during horizontal synch time.
		 * @li 1 = inactive otherwise.
		 */
		unsigned char NOTHsynchOutputLevel : 1;
		/**@brief ~VSYNC Ouput Level.
		 * @li 0 = Active during vertical synch time.
		 * @li 1 = inactive otherwise.
		 */
		unsigned char NOTVsynchOutputLevel : 1;
		/**@brief Character Memory Status.
		 * @li 0 = Available access.
		 * @li 1 = Unavailable access.
		 */
		unsigned char characterMemoryStatus : 1;
		/**@brief Reset Mode.
		 * @li 0 = Clear when power up reset mode is complete.
		 * @li 1 = Set when in power-up reset mode.
		 */
		unsigned char resetMode : 1;
		/**@brief don't care.*/
		unsigned char unused : 1;
	} bits;
};


#define DMDO_ADDRESS_READ 0xB0

/**@typedef DMDO
 * @brief represents a Display Memory Data Out Register value.
 */
typedef unsigned char DMDO;

#define CMDO_ADDRESS_READ 0xC0

/**@union REG_CMDO
 * @brief Represents a Character Memory Data Out value.
 */
union REG_CMDO
{
	/**@brief The whole register value*/
	unsigned char whole;
	/**
	 * @var bits
	 * @brief access to individual bits*/
	struct
	{
		/**@brief right most pixel*/
		unsigned char rightMostPowel : 2;
		/**@brief right center pixel*/
		unsigned char rightCenterPixel : 2;
		/**@brief left center pixel*/
		unsigned char leftCenterPixel : 2;
		/**@brief left most pixel*/
		unsigned char leftMostPixel : 2;
	} bits;
};




/**\def COLOR_BLACK
 * \brief Black value for a pixel (2bits)
 */
#define COLOR_BLACK       0


/**\def COLOR_WHITE
 * \brief White value for a pixel (2bits)
 */
#define COLOR_WHITE       2


/**\def COLOR_TRANSPARENT
 * \brief Transparent value for a pixel (2bits)
 */
#define COLOR_TRANSPARENT 1


/**\def COLOR_GREY
 * \brief Grey value for a pixel (2bits)
 */
#define COLOR_GREY COLOR_TRANSPARENT


/**@struct PIXEL
 * @brief represent a 4-pixels value
 */
struct PIXEL
{
	/**@brief 4th pixel*/
	byte pix3 : 2;
	/**@brief 3rd pixel*/
	byte pix2 : 2;
	/**@brief 2nd pixel*/
	byte pix1 : 2;


	/**@brief 1st pixel*/
	byte pix0 : 2;

};

/**@union LINE
 * @brief Represents a line in a max7456 character ie. 12 pixels
 */
union LINE
{
	/**@brief the whole line*/
	byte whole[3];
	/**@brief individual 4-pixels access*/
	struct PIXEL pixels[3];
};


/**
 * @union CARACT
 * @brief Represents a character with lines and pixels.
 * 	example : myCarac.line[3].pixels[2].pix2 = COLOR_TRANSPARENT ;
 */
union CARACT
{
	/**@brief the whole CARACT as in max7456 Character Memory*/
	charact whole;
	/**@brief acces with lines*/
	union LINE line[18];
};


enum{
_BT_BT=0,
_BT_2BT,
_BT_3BT,
_3BT_BT
};

enum{
_2fields=0,
_4fields,
_6fields,
_8fields
};


#endif /* MAX7456REGISTERS_H_ */