gcn64_protocol.h

#ifndef _gcn64_protocol_h__
#define _gcn64_protocol_h__

#define CONTROLLER_IS_ABSENT	0
#define CONTROLLER_IS_N64		1
#define CONTROLLER_IS_GC		2
#define CONTROLLER_IS_UNKNOWN	3


/* Return many unknown bits, but two are about the expansion port. */
#define N64_GET_CAPABILITIES		0x00
#define N64_CAPS_REPLY_LENGTH		24

#define OFFSET_EXT_REMOVED			22
#define OFFSET_EXT_PRESENT			23

/* Returns button states and axis values */
#define N64_GET_STATUS				0x01
#define N64_GET_STATUS_REPLY_LENGTH	32

/* Read from the expansion bus. */
#define N64_EXPANSION_READ			0x02

/* Write to the expansion bus. */
#define N64_EXPANSION_WRITE			0x03

/* Return information about controller. */
#define GC_GETID					0x00
#define GC_GETID_REPLY_LENGTH		24

/* Return 80 bits, the first 64 have the same meaning as
 * the status command answer (see below), but with axis
 * at their origin. (buttons still work) */
#define GC_GET_ORIGINS				0x41
#define GC_GET_ORIGINS_LENGTH		80

/* 3-byte get status command. Returns axis and buttons. Also 
 * controls motor. */
#define GC_GETSTATUS1				0x40
#define GC_GETSTATUS2				0x03
#define GC_GETSTATUS3(rumbling)		((rumbling) ? 0x01 : 0x00)
#define GC_GETSTATUS_REPLY_LENGTH	64

#define GC_BTN_L	9
#define GC_BTN_R	10
#define GC_BTN_Z	11

void gcn64protocol_hwinit(void);
int gcn64_detectController(void);
int gcn64_transaction(unsigned char *data_out, int data_out_len);

extern volatile unsigned char gcn64_workbuf[];

#endif // _gcn64_protocol_h__