//our address
#define	USI_OURADDRESS		( 0x90 >> 1 )

//waiting for start
#define	USISTATE_NULL		0x0000
//major states
#define	USISTATE_MASK		0x0f00

#define	USISTATE_ACK		0x0001
#define	USISTATE_HAS_START	0x0002
#define	USISTATE_OUTMODE	0x0004
#define	USISTATE_ACKDONE	0x0008

#define	USISTATE_CONTROL	0x0100
#define	USISTATE_COMMAND	0x0200
#define	USISTATE_INPUT		0x0400
#define	USISTATE_OUTPUT		0x0800

//super return states; lower 8 bits for read count
#define SUPER_NULL				0x00
#define SUPER_ACK				0x1000
#define SUPER_START_CMD			0x2000
#define SUPER_LPM_EXIT			0x4000
#define SUPER_CNT_MASK			0x0fff

//State of usi machine
extern uint16_t usi_state;

//The command byte received from master
extern uint16_t usi_command;

//pointer used internally by usi
//This is set by the super, requested by this code
extern uint8_t* usi_buf_ptr;

//A command byte was received by i2c slave
//super needs to deal with it, this needs to be defined elsewhere
uint16_t i2c_super_command( );

//Call this in main at initialization
// or anytime to reset usi
void initialize_i2c( void );