/**
* add one to the seconds
*/
void inline add_second(s_time *time, uint8_t overflow) {
time->second++;
if (time->second >= 60) {
time->second = 0;
if (overflow) {
add_minute(time, 1);
}
}
}
/**
* State machine for menu and display
*/
void run_states(uint8_t state, s_time* time) {
// State machine zum Ändern der Uhrzeit
switch (0xf0 & state) {
case STATE_MENU_SECOND:
set_all_leds(1);
if (b_pressed()) {
add_second(time, 0);
}
display_seconds(*time);
break;
case STATE_MENU_MINUTE:
set_all_leds(1);
if (b_pressed()) {
add_minute(time, 0);
}
display_minutes(*time);
break;
case STATE_MENU_HOUR:
set_all_leds(1);
if (b_pressed()) {
add_hour(time);
}
display_hours(*time);
break;
case STATE_NONE:
set_all_leds(0);
#ifdef WITH_ENLIGHT
if (enlight > 0) {
#endif
display_seconds(*time);
display_minutes(*time);
display_hours(*time);
#ifdef WITH_ENLIGHT
enlight--;
}
#endif
add_second(time, 1);
break;
}
}
int
main(void)
{
the_time first_time,second_time;
int a,b;
a=12;
b=36;
set(&first_time,a,a);
print_time(first_time);
set(&second_time,a,b);
print_time(second_time);
add_minute(&second_time,183);
print_time(second_time);
printf("absoluate different of the times is : %d mins \n",abs_dif_time(&first_time,&second_time));
return 0;
}
uint32_t
decode_time(uint8_t init_min, uint8_t minlen, uint32_t acc_minlen,
const uint8_t * const buffer, struct tm * const time)
{
struct tm newtime;
uint32_t rval = 0;
int16_t increase, i;
uint8_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, utchour;
int8_t centofs;
bool generr, p1, p2, p3, ok;
static uint32_t acc_minlen_partial, old_acc_minlen;
static bool olderr, prev_toolong;
memset(&newtime, 0, sizeof(newtime));
/* Initially, set time offset to unknown */
if (init_min == 2)
time->tm_isdst = -1;
newtime.tm_isdst = time->tm_isdst; /* save DST value */
if (minlen < 59)
rval |= DT_SHORT;
if (minlen > 60)
rval |= DT_LONG;
if (buffer[0] == 1)
rval |= DT_B0;
if (buffer[20] == 0)
rval |= DT_B20;
if (buffer[17] == buffer[18])
rval |= DT_DSTERR;
generr = (rval != 0); /* do not decode if set */
if (buffer[15] == 1)
rval |= DT_XMIT;
/* See if there are any partial / split minutes to be combined: */
if (acc_minlen <= 59000) {
acc_minlen_partial += acc_minlen;
if (acc_minlen_partial >= 60000) {
acc_minlen = acc_minlen_partial;
acc_minlen_partial %= 60000;
}
}
/* Calculate number of minutes to increase time with: */
if (prev_toolong)
increase = (int16_t)((acc_minlen - old_acc_minlen) / 60000);
else
increase = (int16_t)(acc_minlen / 60000);
if (acc_minlen >= 60000)
acc_minlen_partial %= 60000;
/* Account for complete minutes with a short acc_minlen: */
if (acc_minlen % 60000 > 59000) {
increase++;
acc_minlen_partial %= 60000;
}
prev_toolong = (minlen == 0xff);
old_acc_minlen = acc_minlen - (acc_minlen % 60000);
/* There is no previous time on the very first (partial) minute: */
if (init_min < 2) {
for (i = increase; increase > 0 && i > 0; i--)
add_minute(time, true);
for (i = increase; increase < 0 && i < 0; i++)
substract_minute(time, false);
}
p1 = getpar(buffer, 21, 28);
tmp0 = getbcd(buffer, 21, 24);
tmp1 = getbcd(buffer, 25, 27);
if (!p1 || tmp0 > 9 || tmp1 > 5) {
rval |= DT_MIN;
p1 = false;
}
if ((init_min == 2 || increase != 0) && p1 && !generr) {
newtime.tm_min = (int)(tmp0 + 10 * tmp1);
if (init_min == 0 && time->tm_min != newtime.tm_min)
rval |= DT_MINJUMP;
}
p2 = getpar(buffer, 29, 35);
tmp0 = getbcd(buffer, 29, 32);
tmp1 = getbcd(buffer, 33, 34);
if (!p2 || tmp0 > 9 || tmp1 > 2 || tmp0 + 10 * tmp1 > 23) {
rval |= DT_HOUR;
p2 = false;
}
if ((init_min == 2 || increase != 0) && p2 && !generr) {
newtime.tm_hour = (int)(tmp0 + 10 * tmp1);
if (init_min == 0 && time->tm_hour != newtime.tm_hour)
rval |= DT_HOURJUMP;
}
p3 = getpar(buffer, 36, 58);
tmp0 = getbcd(buffer, 36, 39);
tmp1 = getbcd(buffer, 40, 41);
tmp2 = getbcd(buffer, 42, 44);
tmp3 = getbcd(buffer, 45, 48);
tmp4 = getbcd(buffer, 50, 53);
tmp5 = getbcd(buffer, 54, 57);
if (!p3 || tmp0 > 9 || tmp0 + 10 * tmp1 == 0 ||
tmp0 + 10 * tmp1 > 31 || tmp2 == 0 || tmp3 > 9 ||
tmp3 + 10 * buffer[49] == 0 || tmp3 + 10 * buffer[49] > 12 ||
tmp4 > 9 || tmp5 > 9) {
rval |= DT_DATE;
p3 = false;
}
if ((init_min == 2 || increase != 0) && p3 && !generr) {
newtime.tm_mday = (int)(tmp0 + 10 * tmp1);
newtime.tm_mon = (int)(tmp3 + 10 * buffer[49]);
newtime.tm_year = (int)(tmp4 + 10 * tmp5);
newtime.tm_wday = (int)tmp2;
if (init_min == 0 && time->tm_mday != newtime.tm_mday)
rval |= DT_MDAYJUMP;
if (init_min == 0 && time->tm_wday != newtime.tm_wday)
rval |= DT_WDAYJUMP;
if (init_min == 0 && time->tm_mon != newtime.tm_mon)
rval |= DT_MONTHJUMP;
centofs = century_offset(newtime);
if (centofs == -1) {
rval |= DT_DATE;
p3 = false;
} else {
if (init_min == 0 && time->tm_year !=
(int)(BASEYEAR + 100 * centofs + newtime.tm_year))
rval |= DT_YEARJUMP;
newtime.tm_year += BASEYEAR + 100 * centofs;
if (newtime.tm_mday > (int)lastday(newtime)) {
rval |= DT_DATE;
p3 = false;
}
}
}
ok = !generr && p1 && p2 && p3; /* shorthand */
utchour = get_utchour(*time);
/*
* h==23, last day of month (UTC) or h==0, first day of next month (UTC)
* according to IERS Bulletin C
* flag still set at 00:00 UTC, prevent DT_LEAPERR
*/
if (buffer[19] == 1 && ok) {
if (time->tm_mday == 1 && is_leapsecmonth(*time) &&
((time->tm_min > 0 && utchour == 23) ||
(time->tm_min == 0 && utchour == 0)))
announce |= ANN_LEAP;
else {
announce &= ~ANN_LEAP;
rval |= DT_LEAPERR;
}
}
/* process possible leap second, always reset announcement at hh:00 */
if (((announce & ANN_LEAP) == ANN_LEAP) && time->tm_min == 0) {
announce &= ~ANN_LEAP;
rval |= DT_LEAP;
if (minlen == 59) {
/* leap second processed, but missing */
rval |= DT_SHORT;
ok = false;
generr = true;
} else if (minlen == 60 && buffer[59] == 1)
rval |= DT_LEAPONE;
}
if ((minlen == 60) && ((rval & DT_LEAP) == 0)) {
/* leap second not processed, so bad minute */
rval |= DT_LONG;
ok = false;
generr = true;
}
/* h==0 (UTC) because sz->wz -> h==2 and wz->sz -> h==1,
* last Sunday of month (reference?) */
if (buffer[16] == 1 && ok) {
if ((time->tm_wday == 7 && time->tm_mday > (int)(lastday(*time) - 7) &&
(time->tm_mon == (int)summermonth ||
time->tm_mon == (int)wintermonth)) && ((time->tm_min > 0 &&
utchour == 0) || (time->tm_min == 0 &&
utchour == 1 + buffer[17] - buffer[18])))
announce |= ANN_CHDST; /* time zone just changed */
else {
announce &= ~ANN_CHDST;
rval |= DT_CHDSTERR;
}
}
if ((int)buffer[17] != time->tm_isdst || (int)buffer[18] == time->tm_isdst) {
/* Time offset change is OK if:
* announced and time is Sunday, lastday, 01:00 UTC
* there was an error but not any more (needed if decoding at
* startup is problematic)
* initial state (otherwise DST would never be valid)
*/
if ((((announce & ANN_CHDST) == ANN_CHDST) && time->tm_min == 0) ||
(olderr && ok) ||
((rval & DT_DSTERR) == 0 && time->tm_isdst == -1))
newtime.tm_isdst = (int)buffer[17]; /* expected change */
else {
if ((rval & DT_DSTERR) == 0)
rval |= DT_DSTJUMP; /* sudden change, ignore */
ok = false;
}
}
/* check if DST is within expected date range */
if ((time->tm_mon > (int)summermonth && time->tm_mon < (int)wintermonth) ||
(time->tm_mon == (int)summermonth && time->tm_wday < 7 &&
(int)(lastday(*time)) - time->tm_mday < 7) ||
(time->tm_mon == (int)summermonth && time->tm_wday == 7 &&
(int)(lastday(*time)) - time->tm_mday < 7 && utchour > 0) ||
(time->tm_mon == (int)wintermonth && time->tm_wday < 7 &&
(int)(lastday(*time)) - time->tm_mday >= 7) ||
(time->tm_mon == (int)wintermonth && time->tm_wday == 7 &&
(int)(lastday(*time)) - time->tm_mday < 7 &&
(utchour >= 22 /* previous day */ || utchour == 0))) {
/* expect DST */
if (newtime.tm_isdst == 0 && (announce & ANN_CHDST) == 0 &&
utchour < 24) {
rval |= DT_DSTJUMP; /* sudden change */
ok = false;
}
} else {
/* expect non-DST */
if (newtime.tm_isdst == 1 && (announce & ANN_CHDST) == 0 &&
utchour < 24) {
rval |= DT_DSTJUMP; /* sudden change */
ok = false;
}
}
/* done with DST */
if (((announce & ANN_CHDST) == ANN_CHDST) && time->tm_min == 0) {
announce &= ~ANN_CHDST;
rval |= DT_CHDST;
}
newtime.tm_gmtoff = 3600 * (newtime.tm_isdst + 1);
if (olderr && ok)
olderr = false;
if (!generr) {
if (p1)
time->tm_min = newtime.tm_min;
if (p2)
time->tm_hour = newtime.tm_hour;
if (p3) {
time->tm_mday = newtime.tm_mday;
time->tm_mon = newtime.tm_mon;
time->tm_year = newtime.tm_year;
time->tm_wday = newtime.tm_wday;
}
if ((rval & DT_DSTJUMP) == 0) {
time->tm_isdst = newtime.tm_isdst;
time->tm_gmtoff = newtime.tm_gmtoff;
}
}
if (!ok)
olderr = true;
return rval | announce;
}
