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5 <title>hopf clock drivers by ATLSoft</title>
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10 <font face="Arial"><i><blink><font size="5">hopf</font></blink></i><font size="+2">
11 </font><font size="3">Serial Line Receivers (6021 and kompatible)</font></font></h1>
15 <font size=+1>Synopsis</font></h2>
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24 <div align=right><tt>Address: </tt></div>
27 <td><b>127.127.38.<i>X</i></b></td>
32 <div align=right><tt>Reference ID: </tt></div>
35 <td height="1"><a NAME="REFID"></a><b>.hopf. </b>(default)<b>, GPS, DCF</b></td>
40 <div align=right><tt>Driver ID: </tt></div>
43 <td height="21"><b>HOPF_S</b></td>
48 <div align=right><tt>Serial Port: </tt></div>
51 <td height="16"><b>/dev/hopfclock<i>X</i></b></td>
56 <div align=right><tt><font size=+1>Serial I/O</font>: </tt></div>
59 <td height="23"><b>9600 baud, 8-bits, 1-stop, no parity</b></td>
64 <td align="center"><img border="0" src="pic/fg6021.gif" width="238" height="207"></td>
71 <font size=+1>Description</font></h2>
72 The <b>refclock_hopf_serial</b> driver supports <a href="http://www.hopf.com">hopf
73 electronic receivers</a> with serial Interface kompatibel 6021.
74 <br>Additional software and information about the software drivers is available
75 from: <a href="http://www.ATLSoft.de/ntp">http://www.ATLSoft.de/ntp</a>.
76 <br>Latest NTP driver source, executables and documentation is maintained
77 at: <a href="http://www.ATLSoft.de/ntp">http://www.ATLSoft.de/ntp</a>
80 <font size=+1>Operating System Compatibility</font></h2>
82 The hopf clock driver has been tested on the following software and hardware
84 <br> <table bgcolor="#C0C0C0">
86 <td VALIGN=CENTER WIDTH="23%" nowrap>
87 <p align="left"><b>Platform</b></p>
90 <td VALIGN=CENTER nowrap>
91 <p align="left"><b>Operating System</b></p>
97 <td VALIGN=CENTER WIDTH="23%" nowrap>
98 <p align="left">i386 (PC) </p>
101 <td VALIGN=CENTER nowrap>
102 <p align="left">Linux</p>
109 <p align="left">i386 (PC) </p>
113 <p align="left">Windows NT</p>
120 <p align="left">i386 (PC) </p>
125 <td nowrap>Windows 2000</td>
134 <font size=+1>O/S Serial Port Configuration</font></h2>
135 The driver attempts to open the device <b><tt><a href="#REFID">/dev/hopfclock<i>X</i></a></tt></b>
136 where <i><b>X</b></i> is the NTP refclock unit number as defined by the
137 LSB of the refclock address. Valid refclock unit numbers are 0 -
139 <p>The user is expected to provide a symbolic link to an available serial
140 port device. This is typically performed by a command such as:
141 <blockquote><tt>ln -s /dev/ttyS0 /dev/hopfclock0</tt></blockquote>
142 Windows NT does not support symbolic links to device files. <br>
144 is used by the driver, based on the refclock unit number, where <b> unit 1</b>
145 corresponds to <b> COM1</b>: and <b> unit 3</b> corresponds to <b>COM3</b>:
150 <font size=+1>Fudge Factors</font></h2>
155 <a NAME="time1"></a><tt><font size=+1><a href="#Configuration">time1 <i>time</i></a></font></tt></b></dt>
158 Specifies the time offset calibration factor, in seconds and fraction,
159 with default 0.0. Should be set to
160 20 milliseconds to correct serial line and operating system delays incurred
161 in capturing time stamps from the synchronous packets.</dd>
164 <tt><font size=+1><a href="#REFID"><b>refid <i>string</i></b></a></font></tt></dt>
167 Specifies the driver reference identifier, <b>GPS </b><i>or</i> <b> DCF</b>.</dd>
170 <tt><font size=+1><b>flag1 0
171 | 1</b></font></tt></dt>
174 When set to 1, driver sync's even if only crystal driven.</dd>
180 <a NAME="DataFormat"></a><font size=+1>Data Format</font></h2>
181 <p>as specified in clock manual under pt. <u>[ <span lang="EN-GB" style="font-size:10.0pt;font-family:
182 Arial;mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman";
183 mso-ansi-language:EN-GB;mso-fareast-language:DE;mso-bidi-language:AR-SA"><b>Data
184 String for NTP</b> ( <b><i>Network Time Protocol </i></b>) </span>]</u></p>
186 <h3>Questions or Comments:</h3>
187 <p><a href="mailto:altmeier@atlsoft.de">Bernd Altmeier</a><a href="http://www.ATLSoft.de"><br>
188 Ing.-B
\92ro f
\92r Software www.ATLSoft.de</a><p>(last updated 02/28/2001)