1syncinit(1M) System Administration Commands syncinit(1M)
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6 syncinit - set serial line interface operating parameters
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9 /usr/sbin/syncinit device
10 [ [baud_rate] | [keyword=value,]... | [single-word option]]
11
14 The syncinit utility allows the user to modify some of the hardware
15 operating modes common to synchronous serial lines. This can be useful
16 in troubleshooting a link, or necessary to the operation of a communi‐
17 cations package.
18 If run without options, syncinit reports the options as presently set
21 on the port. If options are specified, the new settings are reported
22 after they have been made.
23
25 Options to syncinit normally take the form of a keyword, followed by an
26 equal sign and a value. The exception is that a baud rate may be speci‐
27 fied as a decimal integer by itself. Keywords must begin with the value
28 shown in the options table, but may contain additional letters up to
29 the equal sign. For example, loop= and loopback= are equivalent.
30 The following options are supported:
33 Keyword Value Effect
38 loop yes Set the port to operate in internal
39 loopback mode. The receiver is elec‐
40 trically disconnected from the DCE
41 receive data input and tied to the
42 outgoing transmit data line. Transmit
43 data is available to the DCE. The Dig‐
44 ital Phase-Locked Loop (DPLL) may not
45 be used as a clock source in this
46 mode. If no other clocking options
47 have been specified, perform the
48 equivalent of txc=baud and rxc=baud.
49 no Disable internal loopback mode. If no
50 other clocking options have been spec‐
51 ified, perform the equivalent of
52 txc=txc and rxc=rxc.
53 echo yes Set the port to operate in auto-echo
54 mode. The transmit data output is
55 electrically disconnected from the
56 transmitter and tied to the receive
57 data input. Incoming receive data is
58 still visible. Use of this mode in
59 combination with local loopback mode
60 has no value, and should be rejected
61 by the device driver. The auto-echo
62 mode is useful to make a system become
63 the endpoint of a remote loopback
64 test.
65 no Disable auto-echo mode.
66 nrzi yes Set the port to operate with NRZI data
68 encoding.
69 no Set the port to operate with NRZ data
70 encoding.
71 txc txc Transmit clock source will be the TxC
72 signal (pin 15).
73 rxc Transmit clock source will be the RxC
74 signal (pin 17).
75 baud Transmit clock source will be the
76 internal baud rate generator.
77 pll Transmit clock source will be the out‐
78 put of the DPLL circuit.
79 rxc rxc Receive clock source will be the RxC
80 signal (pin 17).
81 txc Receive clock source will be the TxC
82 signal (pin 15).
83 baud Receive clock source will be the
84 internal baud rate generator.
85 pll Receive clock source will be the out‐
86 put of the DPLL circuit.
87 speed integer Set the baud rate to integer bits per
88 second.
89 There are also several single-word options that set one or more para‐
93 maters at a time:
94 Keyword Equivalent to Options:
99 external txc=txc rxc=rxc loop=no
100 sender txc=baud rxc=rxc loop=no
101 internal txc=pll rxc=pll loop=no
102 stop speed=0
103
106 Example 1 Using syncinit
107 The following command sets the first CPU port to loop internally, using
110 internal clocking and operating at 38400 baud:
111 example# syncinit zsh0 38400 loop=yes
114 device: /dev/zsh ppa: 0
115 speed=38400, loopback=yes, echo=no, nrzi=no, txc=baud, rxc=baud
116 The following command sets the same port's clocking, local loopback and
121 baud rate settings to their default values:
122 example# syncinit zsh0 stop loop=no
125 device: /dev/zsh ppa: 0
126 speed=0, loopback=no, echo=no, nrzi=no, txc=txc, rxc=rxc
127
131 See attributes(5) for descriptions of the following attributes:
132 ┌─────────────────────────────┬─────────────────────────────┐
137 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
138 ├─────────────────────────────┼─────────────────────────────┤
139 │Availability │SUNWcsu │
140 └─────────────────────────────┴─────────────────────────────┘
141
143 syncloop(1M), syncstat(1M), intro(2), ioctl(2), attributes(5), zsh(7D)
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146 device missing minor device number
147 The name device does not end in a decimal number that can be used
149 as a minor device number.
150 bad speed: arg
153 The string arg that accompanied the speed= option could not be
155 interpreted as a decimal integer.
156 Bad arg: arg
159 The string arg did not make sense as an option.
161 ioctl failure code = errno
164 An ioctl(2) system called failed. The meaning of the value of
166 errno may be found in intro(2).
167
170 Do not use syncinit on an active serial link, unless needed to resolve
171 an error condition. Do not use this command casually or without being
172 aware of the consequences.
173SunOS 5.11 9 Mar 1993 syncinit(1M)