clk_wharton.c revision 1.7
1 /* $NetBSD: clk_wharton.c,v 1.7 2024/08/18 20:47:17 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 #include "ntp_types.h" 15 16 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_WHARTON_400A) 17 /* 18 * Support for WHARTON 400A Series clock + 404.2 serial interface. 19 */ 20 21 #include "ntp_fp.h" 22 #include "parse.h" 23 24 #ifndef PARSESTREAM 25 #include "ntp_stdlib.h" 26 #include <stdio.h> 27 #else 28 #include "sys/parsestreams.h" 29 extern void printf (const char *, ...); 30 #endif 31 32 #include "ascii.h" 33 34 /* 35 * In private e-mail alastair (at) wharton.co.uk said : 36 * "If you are going to use the 400A and 404.2 system [for ntp] I recommend 37 * that you set the 400A to output the message every second. The start of 38 * transmission of the first byte of the message is synchronised to the 39 * second edge." 40 * The WHARTON 400A Series is able to send date/time serial messages 41 * in 7 output formats. We use format 1 here because it is the shortest. 42 * For use with this driver, the WHARTON 400A Series clock must be set-up 43 * as follows : 44 * Programmable Selected 45 * Option No Option 46 * BST or CET display 3 9 or 11 47 * No external controller 7 0 48 * Serial Output Format 1 9 1 49 * Baud rate 9600 bps 10 96 50 * Bit length 8 bits 11 8 51 * Parity even 12 E 52 * 53 * WHARTON 400A Series output format 1 is as follows : 54 * 55 * Timestamp STXssmmhhDDMMYYSETX 56 * Pos 0 12345678901234 57 * 0 00000000011111 58 * 59 * STX start transmission (ASCII 0x02) 60 * ETX end transmission (ASCII 0x03) 61 * ss Second expressed in reversed decimal (units then tens) 62 * mm Minute expressed in reversed decimal 63 * hh Hour expressed in reversed decimal 64 * DD Day of month expressed in reversed decimal 65 * MM Month expressed in reversed decimal (January is 1) 66 * YY Year (without century) expressed in reversed decimal 67 * S Status byte : 0x30 + 68 * bit 0 0 = MSF source 1 = DCF source 69 * bit 1 0 = Winter time 1 = Summer time 70 * bit 2 0 = not synchronised 1 = synchronised 71 * bit 3 0 = no early warning 1 = early warning 72 * 73 */ 74 75 static parse_cvt_fnc_t cvt_wharton_400a; 76 static parse_inp_fnc_t inp_wharton_400a; 77 78 /* 79 * parse_cvt_fnc_t cvt_wharton_400a 80 * 81 * convert simple type format 82 */ 83 static u_long 84 cvt_wharton_400a( 85 unsigned char *buffer, 86 int size, 87 struct format *format, 88 clocktime_t *clock_time, 89 void *local 90 ) 91 { 92 int i; 93 94 /* The given `size' includes a terminating null-character. */ 95 if (size != 15 || buffer[0] != STX || buffer[14] != ETX 96 || buffer[13] < '0' || buffer[13] > ('0' + 0xf)) 97 return CVT_NONE; 98 for (i = 1; i < 13; i += 1) 99 if (buffer[i] < '0' || buffer[i] > '9') 100 return CVT_NONE; 101 clock_time->second = (buffer[2] - '0') * 10 + buffer[1] - '0'; 102 clock_time->minute = (buffer[4] - '0') * 10 + buffer[3] - '0'; 103 clock_time->hour = (buffer[6] - '0') * 10 + buffer[5] - '0'; 104 clock_time->day = (buffer[8] - '0') * 10 + buffer[7] - '0'; 105 clock_time->month = (buffer[10] - '0') * 10 + buffer[9] - '0'; 106 clock_time->year = (buffer[12] - '0') * 10 + buffer[11] - '0'; 107 clock_time->usecond = 0; 108 if (buffer[13] & 0x1) /* We have CET time */ 109 clock_time->utcoffset = -1*60*60; 110 else /* We have BST time */ 111 clock_time->utcoffset = 0; 112 if (buffer[13] & 0x2) { 113 clock_time->flags |= PARSEB_DST; 114 clock_time->utcoffset += -1*60*60; 115 } 116 if (!(buffer[13] & 0x4)) 117 clock_time->flags |= PARSEB_NOSYNC; 118 if (buffer[13] & 0x8) 119 clock_time->flags |= PARSEB_ANNOUNCE; 120 121 return CVT_OK; 122 } 123 124 /* 125 * parse_inp_fnc_t inp_wharton_400a 126 * 127 * grab data from input stream 128 */ 129 static u_long 130 inp_wharton_400a( 131 parse_t *parseio, 132 char ch, 133 timestamp_t *tstamp 134 ) 135 { 136 unsigned int rtc; 137 138 parseprintf(DD_PARSE, ("inp_wharton_400a(0x%p, 0x%x, ...)\n", (void*)parseio, ch)); 139 140 switch (ch) 141 { 142 case STX: 143 parseprintf(DD_PARSE, ("inp_wharton_400a: STX seen\n")); 144 145 parseio->parse_index = 1; 146 parseio->parse_data[0] = ch; 147 parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */ 148 return PARSE_INP_SKIP; 149 150 case ETX: 151 parseprintf(DD_PARSE, ("inp_wharton_400a: ETX seen\n")); 152 if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP) 153 return parse_end(parseio); 154 else 155 return rtc; 156 157 default: 158 return parse_addchar(parseio, ch); 159 } 160 } 161 162 clockformat_t clock_wharton_400a = 163 { 164 inp_wharton_400a, /* input handling function */ 165 cvt_wharton_400a, /* conversion function */ 166 0, /* no PPS monitoring */ 167 0, /* conversion configuration */ 168 "WHARTON 400A Series clock Output Format 1", /* String format name */ 169 15, /* string buffer */ 170 0 /* no private data (complete packets) */ 171 }; 172 173 #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_WHARTON_400A) */ 174 NONEMPTY_TRANSLATION_UNIT 175 #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_WHARTON_400A) */ 176 177 /* 178 * clk_wharton.c,v 179 * Revision 4.1 1999/02/28 15:27:24 kardel 180 * wharton clock integration 181 * 182 */ 183
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