display7seg.h

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/*
 *
 * display7seg - Driver interface for the 7-segment display
 * present on Sun Microsystems CP1400 and CP1500
 *
 * Copyright (c) 2000 Eric Brower <[email protected]>
 *
 */

#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__ */