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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <libwr/wrs-msg.h>
#include "wr_irig.h"
static int irig_get_time(struct irig_slave *irig, struct irig_time *t)
{
uint32_t tod = irig->TOD;
uint32_t sec_raw = (tod & IRIG_SLAVE_TOD_SECONDS_MASK) >> IRIG_SLAVE_TOD_SECONDS_SHIFT;
uint32_t min_raw = (tod & IRIG_SLAVE_TOD_MINUTES_MASK) >> IRIG_SLAVE_TOD_MINUTES_SHIFT;
uint32_t hr_raw = (tod & IRIG_SLAVE_TOD_HOURS_MASK) >> IRIG_SLAVE_TOD_HOURS_SHIFT;
uint32_t valid = (tod & IRIG_SLAVE_TOD_VALID);
uint32_t secs = (sec_raw & 0x0f);
uint32_t mins = (min_raw & 0x0f);
uint32_t hrs = (hr_raw & 0x0f);
int i;
for (i = 0; i < 3; i++){
if ((sec_raw >> 5) & (1 << i)) {
secs += 10*(1<<i);
}
if (((min_raw & 0xe0) >> 5) & (1 << i)) {
mins += 10*(1<<i);
}
if(((hr_raw & 0x60) >> 5) & 1<<i) {
hrs += 10*(1<<i);
}
}
if (valid) {
t->sec = secs;
t->min = mins;
t->hour = hrs;
return 0;
}
return -1;
}
static int irig_get_date(struct irig_slave *irig, struct irig_time *t){
uint32_t date = irig->DATE;
uint32_t day_raw = (date & IRIG_SLAVE_DATE_DAYS_MASK) >> IRIG_SLAVE_DATE_DAYS_SHIFT;
uint32_t yr_raw = (date & IRIG_SLAVE_DATE_YEARS_MASK) >> IRIG_SLAVE_DATE_YEARS_SHIFT;
uint32_t valid = (date & IRIG_SLAVE_DATE_VALID);
uint32_t days = (day_raw & 0x0f);
uint32_t yrs = (yr_raw & 0x0f);
uint32_t mon = 0;
const int m_to_d[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304,
334};
int i = 0;
for (i = 0; i < 6; i++) {
if ((day_raw >> 5) & 1 << i) {
if (i >= 4) {
days += 100 * (1 << (i - 4));
} else {
days += 10 * (1 << i);
}
}
}
//fixme
days -= 1;
for (i = 0; i < 4; i++) {
if ((yr_raw >> 5) & (1 << i)){
yrs += 10 * (1 << i);
}
}
yrs += 2000;
for (i = 0; i < 11; i++){
if (days >= m_to_d[i] && days < m_to_d[i + 1]) {
mon = i+1;
days -= m_to_d[i];
}
}
if (valid){
t->day = days;
t->mon = mon;
t->year = yrs;
return 0;
}
return -1;
}
static int irig_get_sbs(struct irig_slave *irig, struct irig_time *t)
{
uint32_t sbs = irig->SBS;
uint32_t valid = (sbs & IRIG_SLAVE_SBS_VALID);
uint32_t hrs;
uint32_t mins;
uint32_t secs;
sbs = (sbs & IRIG_SLAVE_SBS_SBS_MASK) >> IRIG_SLAVE_SBS_SBS_SHIFT;
hrs = sbs / 3600;
mins = (sbs / 60) % 60;
secs = sbs % 60;
if (valid) {
t->sec = secs;
t->min = mins;
t->hour = hrs;
return 0;
}
return -1;
}
static int64_t irig_time_to_seconds(struct irig_time *t)
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{
short month, year;
int64_t result;
const int m_to_d[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304,
334 };
month = t->mon;
year = t->year + month / 12 + 1900;
month %= 12;
if (month < 0) {
year -= 1;
month += 12;
}
result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month];
result = (year - 1970) * 365 + m_to_d[month];
if (month <= 1)
year -= 1;
result += (year - 1968) / 4;
result -= (year - 1900) / 100;
result += (year - 1600) / 400;
result += t->day;
result -= 1;
result *= 24;
result += t->hour;
result *= 60;
result += t->min;
result *= 60;
result += t->sec;
return result;
}
int irig_read_utc(struct wr_irig *wr_irig, int64_t *t_out)
{
struct irig_time t0;
struct irig_time t1;
if (irig_get_time(wr_irig->irig, &(wr_irig->t)) < 0){
return -1;
}
if (irig_get_date(wr_irig->irig, &(wr_irig->t)) < 0){
return -1;
}
if (irig_get_sbs(wr_irig->irig, &t1) < 0){
return -1;
}
//sanity check, time vs sbs
if ((wr_irig->t.sec != t1.sec)
|| (wr_irig->t.min != t1.min)
|| (wr_irig->t.hour != t1.hour)
) {
return -1;
}
printf("IRIG time: %d/%d/%d %02d:%02d:%02d\n",
wr_irig->t.year, wr_irig->t.mon, wr_irig->t.day,
wr_irig->t.hour, wr_irig->t.min, wr_irig->t.sec);
t0 = wr_irig->t;
t0.year -= 1900;
t0.mon -= 1;
*t_out = irig_time_to_seconds(&t0);
return 0;
}
int irig_enable(struct wr_irig *wr_irig, int en) {
wr_irig->irig->CR = (en ? IRIG_SLAVE_CR_ENABLE : 0);
return 0;
}
int irig_enable_status(struct wr_irig *wr_irig)
{
return !!(wr_irig->irig->CR & IRIG_SLAVE_CR_ENABLE);
}