1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
require "linux/ioctl"
# Copyright (c) 2001, 2003 by Mathieu Bouchard
# this is published under the Ruby license
=begin
if using a DB-25 female connector as found on a PC,
then the pin numbering is like:
13 _____ 1
25 \___/ 14
1 = STROBE = the clock line is a square wave, often at 9600 Hz,
which determines the data rate in usual circumstances.
2..9 = D0..D7 = the eight ordinary data bits
10 = -ACK (status bit 6 ?)
11 = BUSY (status bit 7)
12 = PAPER_END (status bit 5)
13 = SELECT (status bit 4 ?)
14 = -AUTOFD
15 = -ERROR (status bit 3 ?)
16 = -INIT
17 = -SELECT_IN
18..25 = GROUND
=end
module Linux; module ParallelPort
extend IoctlClass
@port_flags = %w[
LP_EXIST
LP_SELEC
LP_BUSY
LP_OFFL
LP_NOPA
LP_ERR
LP_ABORT
LP_CAREFUL
LP_ABORTOPEN
LP_TRUST_IRQ
]
@port_status = %w[
nil,
nil,
nil,
LP_PERRORP # unchanged input, active low
LP_PSELECD # unchanged input, active high
LP_POUTPA # unchanged input, active high
LP_PACK # unchanged input, active low
LP_PBUSY # inverted input, active high
]
LPCHAR = 0x0601
LPTIME = 0x0602
LPABORT = 0x0604
LPSETIRQ = 0x0605
LPGETIRQ = 0x0606
LPWAIT = 0x0608
LPCAREFUL = 0x0609 # obsoleted??? wtf?
LPABORTOPEN = 0x060a
LPGETSTATUS = 0x060b # return LP_S(minor)
LPRESET = 0x060c # reset printer
LPGETSTATS = 0x060d # struct lp_stats (most likely turned off)
LPGETFLAGS = 0x060e # get status flags
LPTRUSTIRQ = 0x060f # set/unset the LP_TRUST_IRQ flag
ioctl_reader :port_flags , :LPGETFLAGS
ioctl_reader :port_status, :LPGETSTATUS
ioctl_writer :port_careful,:LPCAREFUL
ioctl_writer :port_char, :LPCHAR
end end
|
