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