clk_wharton.c revision 1.5
1 /* $NetBSD: clk_wharton.c,v 1.5 2016/01/08 21:35:39 christos Exp $ */ 2 3 /* 4 * /src/NTP/ntp4-dev/libparse/clk_wharton.c,v 4.2 2004/11/14 15:29:41 kardel RELEASE_20050508_A 5 * 6 * clk_wharton.c,v 4.2 2004/11/14 15:29:41 kardel RELEASE_20050508_A 7 * 8 * From Philippe De Muyter <phdm (at) macqel.be>, 1999 9 */ 10 #ifdef HAVE_CONFIG_H 11 #include <config.h> 12 #endif 13 14 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_WHARTON_400A) 15 /* 16 * Support for WHARTON 400A Series clock + 404.2 serial interface. 17 * 18 * Copyright (C) 1999, 2000 by Philippe De Muyter <phdm (at) macqel.be> 19 * 20 * This program is distributed in the hope that it will be useful, but WITHOUT 21 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 22 * FITNESS FOR A PARTICULAR PURPOSE. 23 * 24 */ 25 26 #include "ntp_fp.h" 27 #include "ascii.h" 28 #include "parse.h" 29 30 #ifndef PARSESTREAM 31 #include "ntp_stdlib.h" 32 #include <stdio.h> 33 #else 34 #include "sys/parsestreams.h" 35 extern void printf (const char *, ...); 36 #endif 37 38 /* 39 * In private e-mail alastair (at) wharton.co.uk said : 40 * "If you are going to use the 400A and 404.2 system [for ntp] I recommend 41 * that you set the 400A to output the message every second. The start of 42 * transmission of the first byte of the message is synchronised to the 43 * second edge." 44 * The WHARTON 400A Series is able to send date/time serial messages 45 * in 7 output formats. We use format 1 here because it is the shortest. 46 * For use with this driver, the WHARTON 400A Series clock must be set-up 47 * as follows : 48 * Programmable Selected 49 * Option No Option 50 * BST or CET display 3 9 or 11 51 * No external controller 7 0 52 * Serial Output Format 1 9 1 53 * Baud rate 9600 bps 10 96 54 * Bit length 8 bits 11 8 55 * Parity even 12 E 56 * 57 * WHARTON 400A Series output format 1 is as follows : 58 * 59 * Timestamp STXssmmhhDDMMYYSETX 60 * Pos 0 12345678901234 61 * 0 00000000011111 62 * 63 * STX start transmission (ASCII 0x02) 64 * ETX end transmission (ASCII 0x03) 65 * ss Second expressed in reversed decimal (units then tens) 66 * mm Minute expressed in reversed decimal 67 * hh Hour expressed in reversed decimal 68 * DD Day of month expressed in reversed decimal 69 * MM Month expressed in reversed decimal (January is 1) 70 * YY Year (without century) expressed in reversed decimal 71 * S Status byte : 0x30 + 72 * bit 0 0 = MSF source 1 = DCF source 73 * bit 1 0 = Winter time 1 = Summer time 74 * bit 2 0 = not synchronised 1 = synchronised 75 * bit 3 0 = no early warning 1 = early warning 76 * 77 */ 78 79 static parse_cvt_fnc_t cvt_wharton_400a; 80 static parse_inp_fnc_t inp_wharton_400a; 81 82 /* 83 * parse_cvt_fnc_t cvt_wharton_400a 84 * 85 * convert simple type format 86 */ 87 static u_long 88 cvt_wharton_400a( 89 unsigned char *buffer, 90 int size, 91 struct format *format, 92 clocktime_t *clock_time, 93 void *local 94 ) 95 { 96 int i; 97 98 /* The given `size' includes a terminating null-character. */ 99 if (size != 15 || buffer[0] != STX || buffer[14] != ETX 100 || buffer[13] < '0' || buffer[13] > ('0' + 0xf)) 101 return CVT_NONE; 102 for (i = 1; i < 13; i += 1) 103 if (buffer[i] < '0' || buffer[i] > '9') 104 return CVT_NONE; 105 clock_time->second = (buffer[2] - '0') * 10 + buffer[1] - '0'; 106 clock_time->minute = (buffer[4] - '0') * 10 + buffer[3] - '0'; 107 clock_time->hour = (buffer[6] - '0') * 10 + buffer[5] - '0'; 108 clock_time->day = (buffer[8] - '0') * 10 + buffer[7] - '0'; 109 clock_time->month = (buffer[10] - '0') * 10 + buffer[9] - '0'; 110 clock_time->year = (buffer[12] - '0') * 10 + buffer[11] - '0'; 111 clock_time->usecond = 0; 112 if (buffer[13] & 0x1) /* We have CET time */ 113 clock_time->utcoffset = -1*60*60; 114 else /* We have BST time */ 115 clock_time->utcoffset = 0; 116 if (buffer[13] & 0x2) { 117 clock_time->flags |= PARSEB_DST; 118 clock_time->utcoffset += -1*60*60; 119 } 120 if (!(buffer[13] & 0x4)) 121 clock_time->flags |= PARSEB_NOSYNC; 122 if (buffer[13] & 0x8) 123 clock_time->flags |= PARSEB_ANNOUNCE; 124 125 return CVT_OK; 126 } 127 128 /* 129 * parse_inp_fnc_t inp_wharton_400a 130 * 131 * grab data from input stream 132 */ 133 static u_long 134 inp_wharton_400a( 135 parse_t *parseio, 136 char ch, 137 timestamp_t *tstamp 138 ) 139 { 140 unsigned int rtc; 141 142 parseprintf(DD_PARSE, ("inp_wharton_400a(0x%p, 0x%x, ...)\n", (void*)parseio, ch)); 143 144 switch (ch) 145 { 146 case STX: 147 parseprintf(DD_PARSE, ("inp_wharton_400a: STX seen\n")); 148 149 parseio->parse_index = 1; 150 parseio->parse_data[0] = ch; 151 parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */ 152 return PARSE_INP_SKIP; 153 154 case ETX: 155 parseprintf(DD_PARSE, ("inp_wharton_400a: ETX seen\n")); 156 if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP) 157 return parse_end(parseio); 158 else 159 return rtc; 160 161 default: 162 return parse_addchar(parseio, ch); 163 } 164 } 165 166 clockformat_t clock_wharton_400a = 167 { 168 inp_wharton_400a, /* input handling function */ 169 cvt_wharton_400a, /* conversion function */ 170 0, /* no PPS monitoring */ 171 0, /* conversion configuration */ 172 "WHARTON 400A Series clock Output Format 1", /* String format name */ 173 15, /* string buffer */ 174 0 /* no private data (complete packets) */ 175 }; 176 177 #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_WHARTON_400A) */ 178 int clk_wharton_400a_bs; 179 #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_WHARTON_400A) */ 180 181 /* 182 * clk_wharton.c,v 183 * Revision 4.1 1999/02/28 15:27:24 kardel 184 * wharton clock integration 185 * 186 */ 187
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