#ifndef	_ARDUINO_H
#define	_ARDUINO_H

#include	<avr/io.h>

/*
	utility functions
*/

#ifndef		MASK
#define		MASK(PIN)				(1 << PIN)
#endif

/*
	magic I/O routines

	now you can simply SET_OUTPUT(STEP); WRITE(STEP, 1); WRITE(STEP, 0);
*/

#define		_READ(IO)					(IO ## _RPORT & MASK(IO ## _PIN))
#define		_WRITE(IO, v)			do { if (v) { IO ## _WPORT |= MASK(IO ## _PIN); } else { IO ## _WPORT &= ~MASK(IO ## _PIN); }; } while (0)
#define		_TOGGLE(IO)				(IO ## _RPORT = MASK(IO ## _PIN))

#define		_SET_INPUT(IO)		(IO ## _DDR &= ~MASK(IO ## _PIN))
#define		_SET_OUTPUT(IO)		(IO ## _DDR |=  MASK(IO ## _PIN))

#define		_GET_INPUT(IO)		((IO ## _DDR & MASK(IO ## _PIN)) == 0)
#define		_GET_OUTPUT(IO)		((IO ## _DDR & MASK(IO ## _PIN)) != 0)

// why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html

#define		READ(IO)					_READ(IO)
#define		WRITE(IO, v)			_WRITE(IO, v)
#define		TOGGLE(IO)				_TOGGLE(IO)
#define		SET_INPUT(IO)			_SET_INPUT(IO)
#define		SET_OUTPUT(IO)		_SET_OUTPUT(IO)
#define		GET_INPUT(IO)			_GET_INPUT(IO)
#define		GET_OUTPUT(IO)		_GET_OUTPUT(IO)

/*
	ports and functions

	added as necessary or if I feel like it- not a comprehensive list!

	probably needs some #ifdefs for various chip types
*/

#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega328__) || defined (__AVR_ATmega328P__)
	// UART
	#define	RXD					DIO0
	#define	TXD					DIO1

	// SPI
	#define	SCK					DIO13
	#define	MISO				DIO12
	#define	MOSI				DIO11
	#define	SS					DIO10

	// TWI (I2C)
	#define	SCL					AIO5
	#define	SDA					AIO4

	// timers and PWM
	#define	OC0A				DIO6
	#define	OC0B				DIO5
	#define	OC1A				DIO9
	#define	OC1B				DIO10
	#define	OC2A				DIO11
	#define	OC2B				DIO3

	#define	ICP1				DIO8

	/*
		pins
	*/

	#define DIO0_PIN		PIND0
	#define DIO0_RPORT	PIND
	#define DIO0_WPORT	PORTD
	#define DIO0_DDR		DDRD

	#define DIO1_PIN		PIND1
	#define DIO1_RPORT	PIND
	#define DIO1_WPORT	PORTD
	#define DIO1_DDR		DDRD

	#define DIO2_PIN		PIND2
	#define DIO2_RPORT	PIND
	#define DIO2_WPORT	PORTD
	#define DIO2_DDR		DDRD

	#define DIO3_PIN		PIND3
	#define DIO3_RPORT	PIND
	#define DIO3_WPORT	PORTD
	#define DIO3_DDR		DDRD

	#define DIO4_PIN		PIND4
	#define DIO4_RPORT	PIND
	#define DIO4_WPORT	PORTD
	#define DIO4_DDR		DDRD

	#define DIO5_PIN		PIND5
	#define DIO5_RPORT	PIND
	#define DIO5_WPORT	PORTD
	#define DIO5_DDR		DDRD

	#define DIO6_PIN		PIND6
	#define DIO6_RPORT	PIND
	#define DIO6_WPORT	PORTD
	#define DIO6_DDR		DDRD

	#define DIO7_PIN		PIND7
	#define DIO7_RPORT	PIND
	#define DIO7_WPORT	PORTD
	#define DIO7_DDR		DDRD

	#define DIO8_PIN		PINB0
	#define DIO8_RPORT	PINB
	#define DIO8_WPORT	PORTB
	#define DIO8_DDR		DDRB

	#define DIO9_PIN		PINB1
	#define DIO9_RPORT	PINB
	#define DIO9_WPORT	PORTB
	#define DIO9_DDR		DDRB

	#define DIO10_PIN		PINB2
	#define DIO10_RPORT	PINB
	#define DIO10_WPORT	PORTB
	#define DIO10_DDR		DDRB

	#define DIO11_PIN		PINB3
	#define DIO11_RPORT	PINB
	#define DIO11_WPORT	PORTB
	#define DIO11_DDR		DDRB

	#define DIO12_PIN		PINB4
	#define DIO12_RPORT	PINB
	#define DIO12_WPORT	PORTB
	#define DIO12_DDR		DDRB

	#define DIO13_PIN		PINB5
	#define DIO13_RPORT	PINB
	#define DIO13_WPORT	PORTB
	#define DIO13_DDR		DDRB

	#define AIO0_PIN		PINC0
	#define AIO0_RPORT	PINC
	#define AIO0_WPORT	PORTC
	#define AIO0_DDR		DDRC

	#define AIO1_PIN		PINC1
	#define AIO1_RPORT	PINC
	#define AIO1_WPORT	PORTC
	#define AIO1_DDR		DDRC

	#define AIO2_PIN		PINC2
	#define AIO2_RPORT	PINC
	#define AIO2_WPORT	PORTC
	#define AIO2_DDR		DDRC

	#define AIO3_PIN		PINC3
	#define AIO3_RPORT	PINC
	#define AIO3_WPORT	PORTC
	#define AIO3_DDR		DDRC

	#define AIO4_PIN		PINC4
	#define AIO4_RPORT	PINC
	#define AIO4_WPORT	PORTC
	#define AIO4_DDR		DDRC

	#define AIO5_PIN		PINC5
	#define AIO5_RPORT	PINC
	#define AIO5_WPORT	PORTC
	#define AIO5_DDR		DDRC
#endif	/*	_AVR_ATmega{168,328,328P}__) */

#if defined (__AVR_ATmega644__) || defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644PA__)
	// UART
	#define	RXD					DIO0
	#define	TXD					DIO1

	// SPI
	#define	SCK					DIO13
	#define	MISO				DIO12
	#define	MOSI				DIO11
	#define	SS					DIO10

	// TWI (I2C)
	#define	SCL					AIO5
	#define	SDA					AIO4

	// timers and PWM
	#define	OC0A				DIO6
	#define	OC0B				DIO5
	#define	OC1A				DIO9
	#define	OC1B				DIO10
	#define	OC2A				DIO11
	#define	OC2B				DIO3

	#define	ICP1				DIO8

	/*
	pins
	*/

	#define DIO0_PIN		PINB0
	#define DIO0_RPORT	PINB
	#define DIO0_WPORT	PORTB
	#define DIO0_DDR		DDRB

	#define DIO1_PIN		PINB1
	#define DIO1_RPORT	PINB
	#define DIO1_WPORT	PORTB
	#define DIO1_DDR		DDRB

	#define DIO2_PIN		PINB2
	#define DIO2_RPORT	PINB
	#define DIO2_WPORT	PORTB
	#define DIO2_DDR		DDRB

	#define DIO3_PIN		PINB3
	#define DIO3_RPORT	PINB
	#define DIO3_WPORT	PORTB
	#define DIO3_DDR		DDRB

	#define DIO4_PIN		PINB4
	#define DIO4_RPORT	PINB
	#define DIO4_WPORT	PORTB
	#define DIO4_DDR		DDRB

	#define DIO5_PIN		PINB5
	#define DIO5_RPORT	PINB
	#define DIO5_WPORT	PORTB
	#define DIO5_DDR		DDRB

	#define DIO6_PIN		PINB6
	#define DIO6_RPORT	PINB
	#define DIO6_WPORT	PORTB
	#define DIO6_DDR		DDRB

	#define DIO7_PIN		PINB7
	#define DIO7_RPORT	PINB
	#define DIO7_WPORT	PORTB
	#define DIO7_DDR		DDRB

	#define DIO8_PIN		PIND0
	#define DIO8_RPORT	PIND
	#define DIO8_WPORT	PORTD
	#define DIO8_DDR		DDRD

	#define DIO9_PIN		PIND1
	#define DIO9_RPORT	PIND
	#define DIO9_WPORT	PORTD
	#define DIO9_DDR		DDRD

	#define DIO10_PIN		PIND2
	#define DIO10_RPORT	PIND
	#define DIO10_WPORT	PORTD
	#define DIO10_DDR		DDRD

	#define DIO11_PIN		PIND3
	#define DIO11_RPORT	PIND
	#define DIO11_WPORT	PORTD
	#define DIO11_DDR		DDRD

	#define DIO12_PIN		PIND4
	#define DIO12_RPORT	PIND
	#define DIO12_WPORT	PORTD
	#define DIO12_DDR		DDRD

	#define DIO13_PIN		PIND5
	#define DIO13_RPORT	PIND
	#define DIO13_WPORT	PORTD
	#define DIO13_DDR		DDRD

	#define DIO14_PIN		PIND6
	#define DIO14_RPORT	PIND
	#define DIO14_WPORT	PORTD
	#define DIO14_DDR		DDRD

	#define DIO15_PIN		PIND7
	#define DIO15_RPORT	PIND
	#define DIO15_WPORT	PORTD
	#define DIO15_DDR		DDRD

	#define DIO16_PIN		PINC0
	#define DIO16_RPORT	PINC
	#define DIO16_WPORT	PORTC
	#define DIO16_DDR		DDRC

	#define DIO17_PIN		PINC1
	#define DIO17_RPORT	PINC
	#define DIO17_WPORT	PORTC
	#define DIO17_DDR		DDRC

	#define DIO18_PIN		PINC2
	#define DIO18_RPORT	PINC
	#define DIO18_WPORT	PORTC
	#define DIO18_DDR		DDRC

	#define DIO19_PIN		PINC3
	#define DIO19_RPORT	PINC
	#define DIO19_WPORT	PORTC
	#define DIO19_DDR		DDRC

	#define DIO20_PIN		PINC4
	#define DIO20_RPORT	PINC
	#define DIO20_WPORT	PORTC
	#define DIO20_DDR		DDRC

	#define DIO21_PIN		PINC5
	#define DIO21_RPORT	PINC
	#define DIO21_WPORT	PORTC
	#define DIO21_DDR		DDRC

	#define DIO22_PIN		PINC6
	#define DIO22_RPORT	PINC
	#define DIO22_WPORT	PORTC
	#define DIO22_DDR		DDRC

	#define DIO23_PIN		PINC7
	#define DIO23_RPORT	PINC
	#define DIO23_WPORT	PORTC
	#define DIO23_DDR		DDRC

	#define DIO24_PIN		PINA7
	#define DIO24_RPORT	PINA
	#define DIO24_WPORT	PORTA
	#define DIO24_DDR		DDRA

	#define DIO25_PIN		PINA6
	#define DIO25_RPORT	PINA
	#define DIO25_WPORT	PORTA
	#define DIO25_DDR		DDRA

	#define DIO26_PIN		PINA5
	#define DIO26_RPORT	PINA
	#define DIO26_WPORT	PORTA
	#define DIO26_DDR		DDRA

	#define DIO27_PIN		PINA4
	#define DIO27_RPORT	PINA
	#define DIO27_WPORT	PORTA
	#define DIO27_DDR		DDRA

	#define DIO28_PIN		PINA3
	#define DIO28_RPORT	PINA
	#define DIO28_WPORT	PORTA
	#define DIO28_DDR		DDRA

	#define DIO29_PIN		PINA2
	#define DIO29_RPORT	PINA
	#define DIO29_WPORT	PORTA
	#define DIO29_DDR		DDRA

	#define DIO30_PIN		PINA1
	#define DIO30_RPORT	PINA
	#define DIO30_WPORT	PORTA
	#define DIO30_DDR		DDRA

	#define DIO31_PIN		PINA0
	#define DIO31_RPORT	PINA
	#define DIO31_WPORT	PORTA
	#define DIO31_DDR		DDRA

	#define AIO0_PIN		PINA0
	#define AIO0_RPORT	PINA
	#define AIO0_WPORT	PORTA
	#define AIO0_DDR		DDRA

	#define AIO1_PIN		PINA1
	#define AIO1_RPORT	PINA
	#define AIO1_WPORT	PORTA
	#define AIO1_DDR		DDRA

	#define AIO2_PIN		PINA2
	#define AIO2_RPORT	PINA
	#define AIO2_WPORT	PORTA
	#define AIO2_DDR		DDRA

	#define AIO3_PIN		PINA3
	#define AIO3_RPORT	PINA
	#define AIO3_WPORT	PORTA
	#define AIO3_DDR		DDRA

	#define AIO4_PIN		PINA4
	#define AIO4_RPORT	PINA
	#define AIO4_WPORT	PORTA
	#define AIO4_DDR		DDRA

	#define AIO5_PIN		PINA5
	#define AIO5_RPORT	PINA
	#define AIO5_WPORT	PORTA
	#define AIO5_DDR		DDRA

	#define AIO6_PIN		PINA5
	#define AIO5_RPORT	PINA
	#define AIO5_WPORT	PORTA
	#define AIO5_DDR		DDRA

	#define AIO7_PIN		PINA5
	#define AIO5_RPORT	PINA
	#define AIO5_WPORT	PORTA
	#define AIO5_DDR		DDRA
#endif

#if defined (__AVR_ATmega1280__)
#endif	/* __AVR_ATmega1280__) */

#ifndef	DIO0_PIN
#error pins for this chip not defined in arduino.h! If you write an appropriate pin definition and have this firmware work on your chip, please tell us via the forum thread
#endif

#endif /* _ARDUINO_H */