I’m facing the issue of time and date is not updating from the gps module only month and year is updating?
Can you provide your detailed AT log?
The output time of GNRMC format statements is normal
Then why i’m not able to get the date and time… i able to see only month and day other than that nothing is coming… everything is zero…
Yeah, I think it’s pretty weird, too
to much weird, below i attached the function to print the log…
printf (“velan:tm->tm_mday vs %d\n\r”,tm->tm_mday);
printf (“velan:tm->tm_mon vs %d\n\r”,tm->tm_mon);
in below function only not able to get the data
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//window上自己实现strptime函数，linux已经提供strptime
//strptime函数windows平台上实��?
char *strptime(const char *buf, const char *fmt, struct tm *tm)
{
char c;
const char *bp;
size_t len = 0;
int alt_format, i, split_year = 0;
bp = buf;
printf("she_struct hour %d ",tm->tm_hour);
while ((c = fmt) != ‘\0’) {
/ Clear `alternate’ modifier prior to new conversion. */
alt_format = 0;
/* Eat up white-space. */
if (ql_isspace(c)) {
while (ql_isspace(*bp))
bp++;
fmt++;
continue;
}
if ((c = *fmt++) != '%')
goto literal;
again: switch (c = fmt++) {
case ‘%’: / “%%” is converted to “%”. */
literal:
if (c != *bp++)
return (0);
break;
/*
* "Alternative" modifiers. Just set the appropriate flag
* and start over again.
*/
case 'E': /* "%E?" alternative conversion modifier. */
LEGAL_ALT(0);
alt_format |= ALT_E;
goto again;
case 'O': /* "%O?" alternative conversion modifier. */
LEGAL_ALT(0);
alt_format |= ALT_O;
goto again;
/*
* "Complex" conversion rules, implemented through recursion.
*/
case 'c': /* Date and time, using the locale's format. */
LEGAL_ALT(ALT_E);
if (!(bp = strptime(bp, "%x %X", tm)))
return (0);
break;
case 'D': /* The date as "%m/%d/%y". */
LEGAL_ALT(0);
if (!(bp = strptime(bp, "%m/%d/%y", tm)))
{
printf ("velan:time vs %s\n\r",bp);
return (0);
}
printf ("velan:time vs %s\n\r",bp);
break;
case 'R': /* The time as "%H:%M". */
LEGAL_ALT(0);
if (!(bp = strptime(bp, "%H:%M", tm)))
return (0);
break;
case 'r': /* The time in 12-hour clock representation. */
LEGAL_ALT(0);
if (!(bp = strptime(bp, "%I:%M:%S %p", tm)))
{
printf ("velan:time %s\n\r",bp);
return (0);
}
printf ("velan:time vs %s\n\r",bp);
break;
case 'T': /* The time as "%H:%M:%S". */
LEGAL_ALT(0);
if (!(bp = strptime(bp, "%H:%M:%S", tm)))
{
printf ("velan:time %s\n\r",bp);
return (0);
}
printf ("velan:time vs %s\n\r",bp);
break;
case 'X': /* The time, using the locale's format. */
LEGAL_ALT(ALT_E);
if (!(bp = strptime(bp, "%H:%M:%S", tm)))
return (0);
break;
case 'x': /* The date, using the locale's format. */
LEGAL_ALT(ALT_E);
if (!(bp = strptime(bp, "%m/%d/%y", tm)))
return (0);
break;
/*
* "Elementary" conversion rules.
*/
case 'A': /* The day of week, using the locale's form. */
case 'a':
LEGAL_ALT(0);
for (i = 0; i < 7; i++) {
/* Full name. */
len = strlen(day[i]);
if (strncmp(day[i], bp, len) == 0)
break;
/* Abbreviated name. */
len = strlen(abday[i]);
if (strncmp(abday[i], bp, len) == 0)
break;
}
/* Nothing matched. */
if (i == 7)
return (0);
tm->tm_wday = i;
bp += len;
break;
case 'B': /* The month, using the locale's form. */
case 'b':
case 'h':
LEGAL_ALT(0);
for (i = 0; i < 12; i++) {
/* Full name. */
len = strlen(mon[i]);
if (strncmp(mon[i], bp, len) == 0)
break;
/* Abbreviated name. */
len = strlen(abmon[i]);
if (strncmp(abmon[i], bp, len) == 0)
break;
}
/* Nothing matched. */
if (i == 12)
return (0);
tm->tm_mon = i;
bp += len;
break;
case 'C': /* The century number. */
LEGAL_ALT(ALT_E);
if (!(conv_num(&bp, &i, 0, 99)))
return (0);
if (split_year) {
tm->tm_year = (tm->tm_year % 100) + (i * 100);
} else {
tm->tm_year = i * 100;
split_year = 1;
}
printf ("velan:tm->tm_year %d\n\r",tm->tm_year);
break;
case 'd': /* The day of month. */
case 'e':
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_mday, 1, 31)))
{
return (0);
}
printf ("velan:tm->tm_mday vs %d\n\r",tm->tm_mday);
break;
case 'k': /* The hour (24-hour clock representation). */
LEGAL_ALT(0);
/* FALLTHROUGH */
case 'H':
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_hour, 0, 23)))
{
printf ("velan:tm->tm_hour %d\n\r",tm->tm_hour);
return (0);
}
printf ("velan:tm->tm_hour %d\n\r",tm->tm_hour);
break;
case 'l': /* The hour (12-hour clock representation). */
LEGAL_ALT(0);
/* FALLTHROUGH */
case 'I':
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_hour, 1, 12)))
{
printf ("velan:tm->tm_hour vs %d\n\r",tm->tm_hour);
return (0);
}
if (tm->tm_hour == 12)
tm->tm_hour = 0;
printf ("velan:tm->tm_hour vs %d\n\r",tm->tm_hour);
break;
case 'j': /* The day of year. */
LEGAL_ALT(0);
if (!(conv_num(&bp, &i, 1, 366)))
return (0);
tm->tm_yday = i - 1;
break;
case 'M': /* The minute. */
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_min, 0, 59)))
{
printf ("velan:tm->tm_min %d\n\r",tm->tm_min);
return (0);
}
printf ("velan:tm->tm_min vs %d\n\r",tm->tm_min);
break;
case 'm': /* The month. */
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &i, 1, 12)))
return (0);
tm->tm_mon = i - 1;
printf ("velan:tm->tm_mon vs %d\n\r",tm->tm_mon);
break;
case 'p': /* The locale's equivalent of AM/PM. */
LEGAL_ALT(0);
/* AM? */
if (strcmp(am_pm[0], bp) == 0) {
if (tm->tm_hour > 11)
return (0);
bp += strlen(am_pm[0]);
break;
}
/* PM? */
else if (strcmp(am_pm[1], bp) == 0) {
if (tm->tm_hour > 11)
return (0);
tm->tm_hour += 12;
bp += strlen(am_pm[1]);
break;
}
/* Nothing matched. */
return (0);
case 'S': /* The seconds. */
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_sec, 0, 61)))
{
printf ("velan:tm->tm_sec %d\n\r",tm->tm_sec);
return (0);
}
printf ("velan:tm->tm_sec vs %d\n\r",tm->tm_sec);
break;
case 'U': /* The week of year, beginning on sunday. */
case 'W': /* The week of year, beginning on monday. */
LEGAL_ALT(ALT_O);
/*
* XXX This is bogus, as we can not assume any valid
* information present in the tm structure at this
* point to calculate a real value, so just check the
* range for now.
*/
if (!(conv_num(&bp, &i, 0, 53)))
return (0);
break;
case 'w': /* The day of week, beginning on sunday. */
LEGAL_ALT(ALT_O);
if (!(conv_num(&bp, &tm->tm_wday, 0, 6)))
return (0);
break;
case 'Y': /* The year. */
LEGAL_ALT(ALT_E);
if (!(conv_num(&bp, &i, 0, 9999)))
return (0);
tm->tm_year = i - TM_YEAR_BASE;
printf ("velan:tm->tm_year %d\n\r",tm->tm_year );
break;
case 'y': /* The year within 100 years of the epoch. */
LEGAL_ALT(ALT_E | ALT_O);
if (!(conv_num(&bp, &tm->tm_year, 0, 99)))
return (0);
// if (split_year) {
// tm->tm_year = ((tm->tm_year / 100) * 100) + i;
// break;
// }
// split_year = 1;
// if (i <= 68)
// tm->tm_year = i + 2000 - TM_YEAR_BASE;
// else
// tm->tm_year = i + 1900 - TM_YEAR_BASE;
// break;
/*
* Miscellaneous conversions.
*/
case 'n': /* Any kind of white-space. */
case 't':
LEGAL_ALT(0);
while (ql_isspace(*bp))
bp++;
break;
default: /* Unknown/unsupported conversion. */
return (0);
}
}
/* LINTED functional specification */
return ((char *)bp);
}
Blockquote