/* definition of the twiddler protocol */

/*
 * 2400,8,n,1  5-bytes
 *
 *  bit    7   6   5   4   3   2   1   0
 *         0  4L  3M  3L  2M  2L  1M  1L
 *         1  Mo  Al  Co  Fn  Nm  Sh  4M
 *         1  V6  V5  V4  V3  V2  V1  V0
 *         1  H4  H3  H2  H1  H0  V8  V7
 *         1   0   0   0  H8  H7  H6  H5
 * H and V are two complement: up and left is positive
 */

#define TW_L1 0x0001
#define TW_M1 0x0002
#define TW_R1 0x0003
#define TW_ANY1 0x0003
#define TW_L2 0x0004
#define TW_M2 0x0008
#define TW_R2 0x000C
#define TW_ANY2 0x000C
#define TW_L3 0x0010
#define TW_M3 0x0020
#define TW_R3 0x0030
#define TW_ANY3 0x0030
#define TW_L4 0x0040
#define TW_M4 0x0080
#define TW_R4 0x00C0
#define TW_ANY4 0x00C0

#define TW_MOD_0   0x0000
#define TW_MOD_S   0x0100
#define TW_MOD_N   0x0200
#define TW_MOD_F   0x0400
#define TW_MOD_C   0x0800
#define TW_MOD_A   0x1000
#define TW_MOD_M   0x2000

#define TW_ANY_KEY 0x3fff /* any button or modifier */
#define TW_ANY_MOD 0x3f00 /* any modifier */


#define TW_V_SHIFT 14
#define TW_H_SHIFT 23
#define TW_M_MASK 0x1FF /* mask of movement bits, after shifting */
#define TW_M_BIT  0x100

#define TW_SYSTEM_FILE SYSCONFDIR "/gpm-twiddler.conf"
#define TW_CUSTOM_FILE SYSCONFDIR "/gpm-twiddler.user"