hopf GPS/DCF77 6021/komp for Serial Line
Last update: March 30, 2023 19:10 UTC (33276df3b)
Table of Contents
Synopsis
Address: 127.127.38.X
Reference ID: hopf (default), GPS, DCF
Driver ID: HOPF_S
Serial Port: /dev/hopfclockX
Serial I/O: 9600 baud, 8-bits, 1-stop, no parity
Description
The refclock_hopf_serial driver supports hopf electronic receivers with serial Interface kompatibel 6021.
Additional software and information about the software driver is available from: http://www.atlsoft.de/ntp-tcp-netzwerkzeit/.
Latest NTP driver source, executables and documentation is maintained at: http://www.atlsoft.de/ntp-tcp-netzwerkzeit/.
Operating System Compatibility
The hopf clock driver has been tested on the following software and hardware platforms:
| Platform |
Operating System |
| i386 (PC) |
Linux |
| i386 (PC) |
Windows NT |
| i386 (PC) |
Windows 2000 |
O/S Serial Port Configuration
The driver attempts to open the device /dev/hopfclockX where X is the NTP refclock unit number as defined by the LSB of the refclock address. Valid refclock unit numbers are 0 - 3.
The user is expected to provide a symbolic link to an available serial port device. This is typically performed by a command such as:
ln -s /dev/ttyS0 /dev/hopfclock0
Windows NT does not support symbolic links to device files. COMx is used by the driver, based on the refclock unit number, where unit 1 corresponds to COM1 and unit 3 corresponds to COM3.
Fudge Factors
time1 time-
Specifies the time offset calibration factor, in seconds and fraction, with default 0.0. Should be set to 20 milliseconds to correct serial line and operating system delays incurred in capturing time stamps from the synchronous packets.
refid string-
Specifies the driver reference identifier, GPS or DCF.
flag1 0 | 1-
When set to 1, driver syncs even if only crystal driven.
As specified in clock manual in section “Data String for NTP (Network Time Protocol)”.
Bernd Altmeier
Ing.-Büro für Software www.ATLSoft.de