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[SC64][SW] Fixed RTC raw time offset calculation

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This commit is contained in:
Mateusz Faderewski 2024-06-15 00:33:43 +02:00
parent a571fe16f5
commit acc3e588d8
1 changed files with 57 additions and 38 deletions
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95
sw/controller/src/rtc.c
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@ -117,12 +117,20 @@ static void rtc_sanitize_raw_time (rtc_raw_time_t *raw) {
raw->century.value &= 0b00000111;
}
static int8_t rtc_calculate_raw_day_offset (uint8_t century, uint8_t year, uint8_t month, uint8_t day, bool adjust_forward) {
int8_t raw_day_offset = ((century + 2) / 4);
if (((century % 4) == 1) && ((year > 0x00) || (month > 0x02) || ((month == 0x02) && (day >= (0x29 - raw_day_offset))))) {
raw_day_offset += 1;
static int8_t rtc_calculate_backwards_day_offset (uint8_t century, uint8_t year, uint8_t month, uint8_t day) {
int8_t day_offset = ((century + 2) / 4);
if (((century % 4) == 1) && ((year > 0x00) || (month > 0x02))) {
day_offset += 1;
}
return adjust_forward ? raw_day_offset : (-raw_day_offset);
return (-day_offset);
}
static int8_t rtc_calculate_forwards_day_offset (uint8_t century, uint8_t year, uint8_t month, uint8_t day) {
int8_t day_offset = ((century + 2) / 4);
if (((century % 4) == 1) && ((year > 0x00) || (month > 0x02) || ((month == 0x02) && (RTC_FROM_BCD(day) >= (29 - day_offset))))) {
day_offset += 1;
}
return day_offset;
}
static uint8_t rtc_get_days_in_month (uint8_t century, uint8_t year, uint8_t month) {
@ -130,7 +138,9 @@ static uint8_t rtc_get_days_in_month (uint8_t century, uint8_t year, uint8_t mon
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
if (month < 1 || month > 12) {
if (month == 0) {
month = 12;
} else if (month > 12) {
month = (((month - 1) % 12) + 1);
}
@ -159,48 +169,57 @@ static void rtc_adjust_date (uint8_t *century, uint8_t *year, uint8_t *month, ui
int8_t year_offset = 0;
int8_t month_offset = 0;
uint8_t current_month_days = rtc_get_days_in_month(dec_century, dec_year, dec_month);
dec_day += day_offset;
if (dec_day < 1) {
month_offset = -1;
} else if (dec_day > current_month_days) {
dec_day %= current_month_days;
month_offset = 1;
} else {
uint8_t current_month_days = rtc_get_days_in_month(dec_century, dec_year, dec_month);
if (dec_day > current_month_days) {
dec_day %= current_month_days;
month_offset = 1;
}
}
dec_month += month_offset;
if (dec_month < 1) {
dec_month = 12;
year_offset = -1;
} else if (dec_month > 12) {
dec_month = 1;
year_offset = 1;
if (month_offset != 0) {
dec_month += month_offset;
if (dec_month < 1) {
dec_month = 12;
year_offset = -1;
} else if (dec_month > 12) {
dec_month = 1;
year_offset = 1;
}
*month = RTC_TO_BCD(dec_month);
}
*month = RTC_TO_BCD(dec_month);
dec_year += year_offset;
if (dec_year < 0) {
dec_year = 99;
century_offset = -1;
} else if (dec_year > 99) {
dec_year = 0;
century_offset = 1;
if (year_offset != 0) {
dec_year += year_offset;
if (dec_year < 0) {
dec_year = 99;
century_offset = -1;
} else if (dec_year > 99) {
dec_year = 0;
century_offset = 1;
}
*year = RTC_TO_BCD(dec_year);
}
*year = RTC_TO_BCD(dec_year);
dec_century += century_offset;
if (dec_century < 0) {
dec_century = 7;
} else if (dec_century > 7) {
dec_century = 0;
if (century_offset != 0) {
dec_century += century_offset;
if (dec_century < 0) {
dec_century = 7;
} else if (dec_century > 7) {
dec_century = 0;
}
*century = RTC_TO_BCD(dec_century);
}
*century = RTC_TO_BCD(dec_century);
if (dec_day <= 0) {
dec_day = rtc_get_days_in_month(dec_century, dec_year, dec_month) + dec_day;
if (day_offset != 0) {
if (dec_day <= 0) {
dec_day = (rtc_get_days_in_month(dec_century, dec_year, dec_month) + dec_day);
}
*day = RTC_TO_BCD(dec_day);
}
*day = RTC_TO_BCD(dec_day);
}
static void rtc_raw_to_real (rtc_raw_time_t *raw, rtc_real_time_t *real) {
@ -213,7 +232,7 @@ static void rtc_raw_to_real (rtc_raw_time_t *raw, rtc_real_time_t *real) {
real->minute = raw->time.minute;
real->second = raw->time.second;
int8_t day_offset = rtc_calculate_raw_day_offset(real->century, real->year, real->month, real->day, false);
int8_t day_offset = rtc_calculate_backwards_day_offset(real->century, real->year, real->month, real->day);
rtc_adjust_date(&real->century, &real->year, &real->month, &real->day, day_offset);
}
@ -228,7 +247,7 @@ static void rtc_real_to_raw (rtc_raw_time_t *raw, rtc_real_time_t *real) {
raw->time.minute = real->minute;
raw->time.second = real->second;
int8_t day_offset = rtc_calculate_raw_day_offset(raw->century.value, raw->time.year, raw->time.month, raw->time.day, true);
int8_t day_offset = rtc_calculate_forwards_day_offset(raw->century.value, raw->time.year, raw->time.month, raw->time.day);
rtc_adjust_date(&raw->century.value, &raw->time.year, &raw->time.month, &raw->time.day, day_offset);
}