#ifndef SEG7_H
#define SEG7_H

#include "device.h"

#include <stdint.h>
#include <stdbool.h>

#ifdef WITH_GUI
#include <SDL.h>
#endif

// VIA connected on PORTA to 3 wires leading to the 3 coupled 74HC595
// shift register which enable the ROM address lines to read the LED
// segment data (cells 0-15 contain the encoded 7 segments of 16 hexdigits)
//
// PORTA connected as follows:
// xxxxx111
//        +--- SER
//       +---- RCLK
//      +----- SRCLK
enum {
	SER   = 0x01,
	RCLK  = 0x02,
	SRCLK = 0x04
};

typedef struct seg7_t
{
	device_t base;

	uint16_t shift;
	uint16_t latch;

	bool debug;
} seg7_t;

void seg7_init( seg7_t *seg, bool initialize );

uint8_t seg7_read( void *obj, uint16_t addr );
void seg7_write( void *obj, uint16_t addr, uint8_t data );
#ifdef WITH_GUI
void seg7_draw( void *obj, SDL_Renderer *renderer );
#endif
void seg7_deinit( void *obj );

#endif