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