#ifndef OUTPUT_EXTENDER_H_
#define OUTPUT_EXTENDER_H_

#include "4094.h"
#include "util.h"
#include "main.h"


/** Portextender Bitdefinitionen */
enum extout_bits {
	/** LCD Reset pin */
	EXTOUT_LCD_RST,
	/** LCD CS1 pin */
	EXTOUT_LCD_CS2,
	/** LCD CS2 pin */
	EXTOUT_LCD_CS1,
#if BOARDID == BOARDID_MYAVR
	/** LCD E pin */
	EXTOUT_LCD_E,
#else
	EXTOUT_UNUSED_3,
#endif
	/** LED 1 */
	EXTOUT_LED1,
	/** LED 0 */
	EXTOUT_LED0,
	/** LCD DI pin */
	EXTOUT_LCD_DI,
	/** LCD RW pin */
	EXTOUT_LCD_RW,
};

extern sr4094_t extout_state;
extern sr4094_t old_extout_state;


/** \brief	Portextender Bitstatus abfragen */
static inline bool extout_bit_is_set(uint8_t bit_number)
{
	return !!(extout_state & ((sr4094_t)1 << bit_number));
}

/** \brief	Portextender Bit setzen */
static inline void extout_set_bit(uint8_t bit_number)
{
	extout_state |= ((sr4094_t)1 << bit_number);
}

/** \brief	Portextender Bit loeschen */
static inline void extout_clear_bit(uint8_t bit_number)
{
	extout_state &= ~((sr4094_t)1 << bit_number);
}

/** \brief	Portextender Bit setzen oder loeschen. */
static inline void extout_write_bit(uint8_t bit_number, bool set)
{
	if (set)
		extout_set_bit(bit_number);
	else
		extout_clear_bit(bit_number);
}

/** \brief	Portextender Status in Hardware uebertragen. */
static inline void extout_commit(void)
{
	/* Schieberegister beschreiben. */
	sr4094_put_data(old_extout_state, extout_state);
	old_extout_state = extout_state;
}

void extout_init(void);

#endif /* OUTPUT_EXTENDER_H_ */