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display7seg.h

/*
 *
 * display7seg - Driver interface for the 7-segment display
 * present on Sun Microsystems CP1400 and CP1500
 *
 * Copyright (c) 2000 Eric Brower <ebrower@usa.net>
 *
 */

#ifndef __display7seg_h__
#define __display7seg_h__

#define D7S_IOC   'p'

#define D7SIOCRD _IOR(D7S_IOC, 0x45, int) /* Read device state    */
#define D7SIOCWR _IOW(D7S_IOC, 0x46, int) /* Write device state   */
#define D7SIOCTM _IO (D7S_IOC, 0x47)            /* Translate mode (FLIP)*/

/*
 * ioctl flag definitions
 *
 * POINT    - Toggle decimal point  (0=absent 1=present)
 * ALARM    - Toggle alarm LED            (0=green  1=red)
 * FLIP           - Toggle inverted mode  (0=normal 1=flipped)
 * bits 0-4 - Character displayed   (see definitions below)
 *
 * Display segments are defined as follows,
 * subject to D7S_FLIP register state:
 *
 *    a
 *   ---
 * f|   |b
 *   -g-
 * e|   |c
 *   ---
 *    d
 */

#define D7S_POINT (1 << 7)    /* Decimal point*/
#define D7S_ALARM (1 << 6)    /* Alarm LED      */
#define D7S_FLIP  (1 << 5)    /* Flip display */

#define D7S_0           0x00        /* Numerals 0-9 */
#define D7S_1           0x01
#define D7S_2           0x02
#define D7S_3           0x03
#define D7S_4           0x04
#define D7S_5           0x05
#define D7S_6           0x06
#define D7S_7           0x07
#define D7S_8           0x08
#define D7S_9           0x09
#define D7S_A           0x0A        /* Letters A-F, H, L, P */
#define D7S_B           0x0B
#define D7S_C           0x0C
#define D7S_D           0x0D
#define D7S_E           0x0E
#define D7S_F           0x0F
#define D7S_H           0x10
#define D7S_E2          0x11
#define D7S_L           0x12
#define D7S_P           0x13
#define D7S_SEGA  0x14        /* Individual segments */
#define D7S_SEGB  0x15
#define D7S_SEGC  0x16
#define D7S_SEGD  0x17
#define D7S_SEGE  0x18
#define D7S_SEGF  0x19
#define D7S_SEGG  0x1A
#define D7S_SEGABFG 0x1B            /* Segment groupings */
#define D7S_SEGCDEG     0x1C
#define D7S_SEGBCEF 0x1D
#define D7S_SEGADG      0x1E
#define D7S_BLANK 0x1F        /* Clear all segments */

#define D7S_MIN_VAL     0x0
#define D7S_MAX_VAL     0x1F

#endif /* ifndef __display7seg_h__ */

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