/**	NESController.h
  * Brian Pescatore, bhp & Tom Gowing, teg25
  * Contains the many #defines used inside of NESController.c
  *	The system is 100% configurable from this file alone.
  */

/************ Debug print selection *************/
// #define DEBUG 1

#if	DEBUG
// #define DBG_NES1_ONLY
// #define DBG_NES2_ONLY
// #define DBG_SWITCHING
#endif

/******** IO port definitions **************/
// Controller 1
#define NES1_LATCH_DDR	DDRA
#define NES1_LATCH_PORT	PORTA
#define NES1_LATCH_BIT	(1<<2)

#define NES1_CLOCK_DDR	DDRA
#define NES1_CLOCK_PORT	PORTA
#define NES1_CLOCK_BIT	(1<<0)

#define NES1_DATA_PORT	PORTA
#define NES1_DATA_DDR	DDRA
#define NES1_DATA_PIN	PINA
#define NES1_DATA_BIT	(1<<4)

// Controller 2
#define NES2_LATCH_DDR	DDRA
#define NES2_LATCH_PORT	PORTA
#define NES2_LATCH_BIT	(1<<3)

#define NES2_CLOCK_DDR	DDRA
#define NES2_CLOCK_PORT	PORTA
#define NES2_CLOCK_BIT	(1<<1)

#define NES2_DATA_PORT	PORTA
#define NES2_DATA_DDR	DDRA
#define NES2_DATA_PIN	PINA
#define NES2_DATA_BIT	(1<<5)


/********* IO port manipulation macros **********/
// Controller 1
#define NES1_LATCH_LOW()		do { NES1_LATCH_PORT &= ~(NES1_LATCH_BIT); } while(0)
#define NES1_LATCH_HIGH()		do { NES1_LATCH_PORT |= NES1_LATCH_BIT; } while(0)
#define NES1_CLOCK_LOW()		do { NES1_CLOCK_PORT &= ~(NES1_CLOCK_BIT); } while(0)
#define NES1_CLOCK_HIGH()		do { NES1_CLOCK_PORT |= NES1_CLOCK_BIT; } while(0)

#define NES1_GET_DATA()			(NES1_DATA_PIN & NES1_DATA_BIT)

// Controller 2
#define NES2_LATCH_LOW()		do { NES2_LATCH_PORT &= ~(NES2_LATCH_BIT); } while(0)
#define NES2_LATCH_HIGH()		do { NES2_LATCH_PORT |= NES2_LATCH_BIT; } while(0)
#define NES2_CLOCK_LOW()		do { NES2_CLOCK_PORT &= ~(NES2_CLOCK_BIT); } while(0)
#define NES2_CLOCK_HIGH()		do { NES2_CLOCK_PORT |= NES2_CLOCK_BIT; } while(0)

#define NES2_GET_DATA()			(NES2_DATA_PIN & NES2_DATA_BIT)

/************ Timing Variable Setup *************/

#define UPDATE_TIME		2
volatile char update_timer = UPDATE_TIME;	
#define RESET_UPDATE_TIMER		do { update_timer = UPDATE_TIME; } while(0)

#define SWITCH_TIME		30
volatile char switch_timer = SWITCH_TIME;	
#define RESET_SWITCH_TIMER		do { switch_timer = SWITCH_TIME; } while(0)