81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* display7seg - Driver interface for the 7-segment display
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* present on Sun Microsystems CP1400 and CP1500
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*
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* Copyright (c) 2000 Eric Brower <ebrower@usa.net>
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*
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*/
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#ifndef __display7seg_h__
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#define __display7seg_h__
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#define D7S_IOC 'p'
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#define D7SIOCRD _IOR(D7S_IOC, 0x45, int) /* Read device state */
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#define D7SIOCWR _IOW(D7S_IOC, 0x46, int) /* Write device state */
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#define D7SIOCTM _IO (D7S_IOC, 0x47) /* Translate mode (FLIP)*/
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/*
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* ioctl flag definitions
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*
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* POINT - Toggle decimal point (0=absent 1=present)
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* ALARM - Toggle alarm LED (0=green 1=red)
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* FLIP - Toggle inverted mode (0=normal 1=flipped)
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* bits 0-4 - Character displayed (see definitions below)
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*
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* Display segments are defined as follows,
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* subject to D7S_FLIP register state:
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*
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* a
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* ---
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* f| |b
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* -g-
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* e| |c
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* ---
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* d
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*/
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#define D7S_POINT (1 << 7) /* Decimal point*/
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#define D7S_ALARM (1 << 6) /* Alarm LED */
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#define D7S_FLIP (1 << 5) /* Flip display */
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#define D7S_0 0x00 /* Numerals 0-9 */
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#define D7S_1 0x01
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#define D7S_2 0x02
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#define D7S_3 0x03
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#define D7S_4 0x04
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#define D7S_5 0x05
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#define D7S_6 0x06
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#define D7S_7 0x07
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#define D7S_8 0x08
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#define D7S_9 0x09
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#define D7S_A 0x0A /* Letters A-F, H, L, P */
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#define D7S_B 0x0B
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#define D7S_C 0x0C
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#define D7S_D 0x0D
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#define D7S_E 0x0E
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#define D7S_F 0x0F
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#define D7S_H 0x10
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#define D7S_E2 0x11
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#define D7S_L 0x12
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#define D7S_P 0x13
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#define D7S_SEGA 0x14 /* Individual segments */
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#define D7S_SEGB 0x15
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#define D7S_SEGC 0x16
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#define D7S_SEGD 0x17
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#define D7S_SEGE 0x18
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#define D7S_SEGF 0x19
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#define D7S_SEGG 0x1A
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#define D7S_SEGABFG 0x1B /* Segment groupings */
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#define D7S_SEGCDEG 0x1C
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#define D7S_SEGBCEF 0x1D
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#define D7S_SEGADG 0x1E
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#define D7S_BLANK 0x1F /* Clear all segments */
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#define D7S_MIN_VAL 0x0
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#define D7S_MAX_VAL 0x1F
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#endif /* ifndef __display7seg_h__ */
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