379 lines
7.6 KiB
C
379 lines
7.6 KiB
C
/*
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*
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* refclock_hopfser.c
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* - clock driver for hopf serial boards (GPS or DCF77)
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*
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* Date: 30.03.2000 Revision: 01.10
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*
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* latest source and further information can be found at:
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* http://www.ATLSoft.de/ntp
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#if defined(SYS_WINNT)
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#undef close
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#define close closesocket
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#endif
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#if defined(REFCLOCK) && (defined(CLOCK_HOPF_SERIAL))
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#include "ntpd.h"
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#include "ntp_io.h"
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#include "ntp_control.h"
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#include "ntp_refclock.h"
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#include "ntp_unixtime.h"
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#include "ntp_stdlib.h"
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#if defined HAVE_SYS_MODEM_H
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# include <sys/modem.h>
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# define TIOCMSET MCSETA
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# define TIOCMGET MCGETA
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# define TIOCM_RTS MRTS
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#endif
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#ifdef HAVE_TERMIOS_H
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# ifdef TERMIOS_NEEDS__SVID3
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# define _SVID3
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# endif
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# include <termios.h>
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# ifdef TERMIOS_NEEDS__SVID3
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# undef _SVID3
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# endif
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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/*
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* clock definitions
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*/
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#define DESCRIPTION "hopf Elektronik serial clock" /* Long name */
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#define PRECISION (-10) /* precision assumed (about 1 ms) */
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#define REFID "hopf\0" /* reference ID */
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/*
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* I/O definitions
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*/
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#define DEVICE "/dev/hopfclock%d" /* device name and unit */
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#define SPEED232 B9600 /* uart speed (9600 baud) */
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#define STX 0x02
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#define ETX 0x03
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#define CR 0x0c
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#define LF 0x0a
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/* parse states */
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#define REC_QUEUE_EMPTY 0
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#define REC_QUEUE_FULL 1
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#define HOPF_OPMODE 0x0C /* operation mode mask */
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#define HOPF_INVALID 0x00 /* no time code available */
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#define HOPF_INTERNAL 0x04 /* internal clock */
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#define HOPF_RADIO 0x08 /* radio clock */
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#define HOPF_RADIOHP 0x0C /* high precision radio clock */
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/*
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* hopfclock unit control structure.
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*/
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struct hopfclock_unit {
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l_fp laststamp; /* last receive timestamp */
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short unit; /* NTP refclock unit number */
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u_long polled; /* flag to detect noreplies */
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char leap_status; /* leap second flag */
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int rpt_next;
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};
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/*
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* Function prototypes
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*/
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static int hopfserial_start P((int, struct peer *));
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static void hopfserial_shutdown P((int, struct peer *));
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static void hopfserial_receive P((struct recvbuf *));
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static void hopfserial_poll P((int, struct peer *));
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/* static void hopfserial_io P((struct recvbuf *)); */
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/*
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* Transfer vector
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*/
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struct refclock refclock_hopfser = {
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hopfserial_start, /* start up driver */
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hopfserial_shutdown, /* shut down driver */
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hopfserial_poll, /* transmit poll message */
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noentry, /* not used */
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noentry, /* initialize driver (not used) */
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noentry, /* not used */
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NOFLAGS /* not used */
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};
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/*
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* hopfserial_start - open the devices and initialize data for processing
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*/
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static int
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hopfserial_start (
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int unit,
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struct peer *peer
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)
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{
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register struct hopfclock_unit *up;
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struct refclockproc *pp;
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int fd;
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char gpsdev[20];
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#ifdef SYS_WINNT
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(void) sprintf(gpsdev, "COM%d:", unit);
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#else
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(void) sprintf(gpsdev, DEVICE, unit);
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#endif
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/* LDISC_STD, LDISC_RAW
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* Open serial port. Use CLK line discipline, if available.
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*/
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fd = refclock_open(gpsdev, SPEED232, LDISC_CLK);
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if (fd <= 0) {
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#ifdef DEBUG
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printf("hopfSerialClock(%d) start: open %s failed\n", unit, gpsdev);
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#endif
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return 0;
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}
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msyslog(LOG_NOTICE, "hopfSerialClock(%d) fd: %d dev: %s", unit, fd,
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gpsdev);
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/*
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* Allocate and initialize unit structure
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*/
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up = (struct hopfclock_unit *) emalloc(sizeof(struct hopfclock_unit));
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if (!(up)) {
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msyslog(LOG_ERR, "hopfSerialClock(%d) emalloc: %m",unit);
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#ifdef DEBUG
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printf("hopfSerialClock(%d) emalloc\n",unit);
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#endif
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(void) close(fd);
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return (0);
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}
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memset((char *)up, 0, sizeof(struct hopfclock_unit));
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pp = peer->procptr;
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pp->unitptr = (caddr_t)up;
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pp->io.clock_recv = hopfserial_receive;
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pp->io.srcclock = (caddr_t)peer;
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pp->io.datalen = 0;
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pp->io.fd = fd;
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if (!io_addclock(&pp->io)) {
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#ifdef DEBUG
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printf("hopfSerialClock(%d) io_addclock\n",unit);
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#endif
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(void) close(fd);
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free(up);
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return (0);
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}
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/*
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* Initialize miscellaneous variables
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*/
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pp->clockdesc = DESCRIPTION;
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peer->precision = PRECISION;
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peer->burst = NSTAGE;
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memcpy((char *)&pp->refid, REFID, 4);
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up->leap_status = 0;
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up->unit = (short) unit;
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return (1);
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}
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/*
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* hopfserial_shutdown - shut down the clock
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*/
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static void
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hopfserial_shutdown (
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int unit,
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struct peer *peer
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)
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{
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register struct hopfclock_unit *up;
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struct refclockproc *pp;
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pp = peer->procptr;
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up = (struct hopfclock_unit *)pp->unitptr;
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io_closeclock(&pp->io);
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free(up);
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}
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/*
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* hopfserial_receive - receive data from the serial interface
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*/
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static void
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hopfserial_receive (
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struct recvbuf *rbufp
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)
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{
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struct hopfclock_unit *up;
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struct refclockproc *pp;
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struct peer *peer;
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int synch; /* synchhronization indicator */
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int DoW; /* Dow */
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int day, month; /* ddd conversion */
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/*
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* Initialize pointers and read the timecode and timestamp.
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*/
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peer = (struct peer *)rbufp->recv_srcclock;
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pp = peer->procptr;
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up = (struct hopfclock_unit *)pp->unitptr;
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if (up->rpt_next == 0 )
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return;
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up->rpt_next = 0; /* wait until next poll interval occur */
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pp->lencode = (u_short)refclock_gtlin(rbufp, pp->a_lastcode, BMAX, &pp->lastrec);
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if (pp->lencode == 0)
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return;
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sscanf(pp->a_lastcode,
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#if 1
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"%1x%1x%2d%2d%2d%2d%2d%2d", /* ...cr,lf */
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#else
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"%*c%1x%1x%2d%2d%2d%2d%2d%2d", /* stx...cr,lf,etx */
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#endif
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&synch,
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&DoW,
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&pp->hour,
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&pp->minute,
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&pp->second,
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&day,
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&month,
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&pp->year);
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/*
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Validate received values at least enough to prevent internal
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array-bounds problems, etc.
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*/
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if((pp->hour < 0) || (pp->hour > 23) ||
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(pp->minute < 0) || (pp->minute > 59) ||
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(pp->second < 0) || (pp->second > 60) /*Allow for leap seconds.*/ ||
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(day < 1) || (day > 31) ||
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(month < 1) || (month > 12) ||
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(pp->year < 0) || (pp->year > 99)) {
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/* Data out of range. */
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refclock_report(peer, CEVNT_BADREPLY);
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return;
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}
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/*
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some preparations
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*/
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pp->day = ymd2yd(pp->year,month,day);
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pp->leap=0;
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/* Year-2000 check! */
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/* wrap 2-digit date into 4-digit */
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if(pp->year < YEAR_PIVOT) { pp->year += 100; } /* < 98 */
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pp->year += 1900;
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/* preparation for timecode ntpq rl command ! */
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#if 0
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wsprintf(pp->a_lastcode,
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"STATUS: %1X%1X, DATE: %02d.%02d.%04d TIME: %02d:%02d:%02d",
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synch,
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DoW,
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day,
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month,
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pp->year,
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pp->hour,
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pp->minute,
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pp->second);
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pp->lencode = strlen(pp->a_lastcode);
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if ((synch && 0xc) == 0 ){ /* time ok? */
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refclock_report(peer, CEVNT_BADTIME);
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pp->leap = LEAP_NOTINSYNC;
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return;
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}
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#endif
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/*
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* If clock has no valid status then report error and exit
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*/
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if ((synch & HOPF_OPMODE) == HOPF_INVALID ){ /* time ok? */
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refclock_report(peer, CEVNT_BADTIME);
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pp->leap = LEAP_NOTINSYNC;
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return;
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}
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/*
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* Test if time is running on internal quarz
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* if CLK_FLAG1 is set, sychronize even if no radio operation
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*/
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if ((synch & HOPF_OPMODE) == HOPF_INTERNAL){
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if ((pp->sloppyclockflag & CLK_FLAG1) == 0) {
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refclock_report(peer, CEVNT_BADTIME);
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pp->leap = LEAP_NOTINSYNC;
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return;
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}
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}
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if (!refclock_process(pp)) {
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refclock_report(peer, CEVNT_BADTIME);
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return;
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}
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pp->lastref = pp->lastrec;
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refclock_receive(peer);
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#if 0
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msyslog(LOG_ERR, " D:%x D:%d D:%d",synch,pp->minute,pp->second);
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#endif
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record_clock_stats(&peer->srcadr, pp->a_lastcode);
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return;
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}
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/*
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* hopfserial_poll - called by the transmit procedure
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*
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*/
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static void
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hopfserial_poll (
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int unit,
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struct peer *peer
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)
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{
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register struct hopfclock_unit *up;
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struct refclockproc *pp;
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pp = peer->procptr;
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up = (struct hopfclock_unit *)pp->unitptr;
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pp->polls++;
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up->rpt_next = 1;
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#if 0
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record_clock_stats(&peer->srcadr, pp->a_lastcode);
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#endif
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return;
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}
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#else
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int refclock_hopfser_bs;
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#endif /* REFCLOCK */
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