diff options
Diffstat (limited to 'libparse/clk_schmid.c')
| -rw-r--r-- | libparse/clk_schmid.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/libparse/clk_schmid.c b/libparse/clk_schmid.c new file mode 100644 index 0000000..52c0ef4 --- /dev/null +++ b/libparse/clk_schmid.c @@ -0,0 +1,231 @@ +/* + * /src/NTP/ntp-4/libparse/clk_schmid.c,v 4.5 1999/11/28 09:13:51 kardel RELEASE_19991128_A + * + * clk_schmid.c,v 4.5 1999/11/28 09:13:51 kardel RELEASE_19991128_A + * + * Schmid clock support + * + * Copyright (C) 1992-1998 by Frank Kardel + * Friedrich-Alexander Universität Erlangen-Nürnberg, Germany + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_SCHMID) + +#include "ntp_fp.h" +#include "ntp_unixtime.h" +#include "ntp_calendar.h" + +#include "parse.h" + +#ifndef PARSESTREAM +#include "ntp_stdlib.h" +#include <stdio.h> +#else +#include "sys/parsestreams.h" +extern void printf P((const char *, ...)); +#endif + +/* + * Description courtesy of Adam W. Feigin et. al (Swisstime iis.ethz.ch) + * + * The command to Schmid's DCF77 clock is a single byte; each bit + * allows the user to select some part of the time string, as follows (the + * output for the lsb is sent first). + * + * Bit 0: time in MEZ, 4 bytes *binary, not BCD*; hh.mm.ss.tenths + * Bit 1: date 3 bytes *binary, not BCD: dd.mm.yy + * Bit 2: week day, 1 byte (unused here) + * Bit 3: time zone, 1 byte, 0=MET, 1=MEST. (unused here) + * Bit 4: clock status, 1 byte, 0=time invalid, + * 1=time from crystal backup, + * 3=time from DCF77 + * Bit 5: transmitter status, 1 byte, + * bit 0: backup antenna + * bit 1: time zone change within 1h + * bit 3,2: TZ 01=MEST, 10=MET + * bit 4: leap second will be + * added within one hour + * bits 5-7: Zero + * Bit 6: time in backup mode, units of 5 minutes (unused here) + * + */ +#define WS_TIME 0x01 +#define WS_SIGNAL 0x02 + +#define WS_ALTERNATE 0x01 +#define WS_ANNOUNCE 0x02 +#define WS_TZ 0x0c +#define WS_MET 0x08 +#define WS_MEST 0x04 +#define WS_LEAP 0x10 + +static u_long cvt_schmid P((unsigned char *, int, struct format *, clocktime_t *, void *)); +static unsigned long inp_schmid P((parse_t *, unsigned int, timestamp_t *)); + +clockformat_t clock_schmid = +{ + inp_schmid, /* no input handling */ + cvt_schmid, /* Schmid conversion */ + 0, /* not direct PPS monitoring */ + 0, /* conversion configuration */ + "Schmid", /* Schmid receiver */ + 12, /* binary data buffer */ + 0, /* no private data (complete messages) */ +}; + + +static u_long +cvt_schmid( + unsigned char *buffer, + int size, + struct format *format, + clocktime_t *clock_time, + void *local + ) +{ + if ((size != 11) || (buffer[10] != (unsigned char)'\375')) + { + return CVT_NONE; + } + else + { + if (buffer[0] > 23 || buffer[1] > 59 || buffer[2] > 59 || buffer[3] > 9) /* Time */ + { + return CVT_FAIL|CVT_BADTIME; + } + else + if (buffer[4] < 1 || buffer[4] > 31 || buffer[5] < 1 || buffer[5] > 12 + || buffer[6] > 99) + { + return CVT_FAIL|CVT_BADDATE; + } + else + { + clock_time->hour = buffer[0]; + clock_time->minute = buffer[1]; + clock_time->second = buffer[2]; + clock_time->usecond = buffer[3] * 100000; + clock_time->day = buffer[4]; + clock_time->month = buffer[5]; + clock_time->year = buffer[6]; + + clock_time->flags = 0; + + switch (buffer[8] & WS_TZ) + { + case WS_MET: + clock_time->utcoffset = -1*60*60; + break; + + case WS_MEST: + clock_time->utcoffset = -2*60*60; + clock_time->flags |= PARSEB_DST; + break; + + default: + return CVT_FAIL|CVT_BADFMT; + } + + if (!(buffer[7] & WS_TIME)) + { + clock_time->flags |= PARSEB_POWERUP; + } + + if (!(buffer[7] & WS_SIGNAL)) + { + clock_time->flags |= PARSEB_NOSYNC; + } + + if (buffer[7] & WS_SIGNAL) + { + if (buffer[8] & WS_ALTERNATE) + { + clock_time->flags |= PARSEB_ALTERNATE; + } + + if (buffer[8] & WS_ANNOUNCE) + { + clock_time->flags |= PARSEB_ANNOUNCE; + } + + if (buffer[8] & WS_LEAP) + { + clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */ + } + } + + clock_time->flags |= PARSEB_S_LEAP|PARSEB_S_ANTENNA; + + return CVT_OK; + } + } +} + +/* + * inp_schmid + * + * grep data from input stream + */ +static u_long +inp_schmid( + parse_t *parseio, + unsigned int ch, + timestamp_t *tstamp + ) +{ + unsigned int rtc; + + parseprintf(DD_PARSE, ("inp_schmid(0x%lx, 0x%x, ...)\n", (long)parseio, ch)); + + switch (ch) + { + case 0xFD: /* */ + parseprintf(DD_PARSE, ("mbg_input: ETX seen\n")); + if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP) + return parse_end(parseio); + else + return rtc; + + default: + return parse_addchar(parseio, ch); + } +} + +#else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */ +int clk_schmid_bs; +#endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */ + +/* + * History: + * + * clk_schmid.c,v + * Revision 4.5 1999/11/28 09:13:51 kardel + * RECON_4_0_98F + * + * Revision 4.4 1998/06/13 12:06:03 kardel + * fix SYSV clock name clash + * + * Revision 4.3 1998/06/12 15:22:29 kardel + * fix prototypes + * + * Revision 4.2 1998/06/12 09:13:26 kardel + * conditional compile macros fixed + * printf prototype + * + * Revision 4.1 1998/05/24 09:39:53 kardel + * implementation of the new IO handling model + * + * Revision 4.0 1998/04/10 19:45:31 kardel + * Start 4.0 release version numbering + * + * from V3 3.22 log info deleted 1998/04/11 kardel + */ |
