tumbledemerald-legacy/src/rtc.c
2022-05-19 17:14:13 +00:00

347 lines
7.4 KiB
C

#include "global.h"
#include "rtc.h"
#include "string_util.h"
#include "text.h"
// iwram bss
static u16 sErrorStatus;
static struct SiiRtcInfo sRtc;
static u8 sProbeResult;
static u16 sSavedIme;
// iwram common
struct Time gLocalTime;
// const rom
static const struct SiiRtcInfo sRtcDummy = {0, MONTH_JAN, 1}; // 2000 Jan 1
static const s32 sNumDaysInMonths[12] =
{
31,
28,
31,
30,
31,
30,
31,
31,
30,
31,
30,
31,
};
void RtcDisableInterrupts(void)
{
sSavedIme = REG_IME;
REG_IME = 0;
}
void RtcRestoreInterrupts(void)
{
REG_IME = sSavedIme;
}
u32 ConvertBcdToBinary(u8 bcd)
{
if (bcd > 0x9F)
return 0xFF;
if ((bcd & 0xF) <= 9)
return (10 * ((bcd >> 4) & 0xF)) + (bcd & 0xF);
else
return 0xFF;
}
bool8 IsLeapYear(u32 year)
{
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
return TRUE;
return FALSE;
}
u16 ConvertDateToDayCount(u8 year, u8 month, u8 day)
{
s32 i;
u16 dayCount = 0;
for (i = year - 1; i >= 0; i--)
{
dayCount += 365;
if (IsLeapYear(i) == TRUE)
dayCount++;
}
for (i = 0; i < month - 1; i++)
dayCount += sNumDaysInMonths[i];
if (month > MONTH_FEB && IsLeapYear(year) == TRUE)
dayCount++;
dayCount += day;
return dayCount;
}
u16 RtcGetDayCount(struct SiiRtcInfo *rtc)
{
u8 year = ConvertBcdToBinary(rtc->year);
u8 month = ConvertBcdToBinary(rtc->month);
u8 day = ConvertBcdToBinary(rtc->day);
return ConvertDateToDayCount(year, month, day);
}
void RtcInit(void)
{
sErrorStatus = 0;
RtcDisableInterrupts();
SiiRtcUnprotect();
sProbeResult = SiiRtcProbe();
RtcRestoreInterrupts();
if ((sProbeResult & 0xF) != 1)
{
sErrorStatus = RTC_INIT_ERROR;
return;
}
if (sProbeResult & 0xF0)
sErrorStatus = RTC_INIT_WARNING;
else
sErrorStatus = 0;
RtcGetRawInfo(&sRtc);
sErrorStatus = RtcCheckInfo(&sRtc);
}
u16 RtcGetErrorStatus(void)
{
return sErrorStatus;
}
void RtcGetInfo(struct SiiRtcInfo *rtc)
{
if (sErrorStatus & RTC_ERR_FLAG_MASK)
*rtc = sRtcDummy;
else
RtcGetRawInfo(rtc);
}
void RtcGetDateTime(struct SiiRtcInfo *rtc)
{
RtcDisableInterrupts();
SiiRtcGetDateTime(rtc);
RtcRestoreInterrupts();
}
void RtcGetStatus(struct SiiRtcInfo *rtc)
{
RtcDisableInterrupts();
SiiRtcGetStatus(rtc);
RtcRestoreInterrupts();
}
void RtcGetRawInfo(struct SiiRtcInfo *rtc)
{
RtcGetStatus(rtc);
RtcGetDateTime(rtc);
}
u16 RtcCheckInfo(struct SiiRtcInfo *rtc)
{
u16 errorFlags = 0;
s32 year;
s32 month;
s32 value;
if (rtc->status & SIIRTCINFO_POWER)
errorFlags |= RTC_ERR_POWER_FAILURE;
if (!(rtc->status & SIIRTCINFO_24HOUR))
errorFlags |= RTC_ERR_12HOUR_CLOCK;
year = ConvertBcdToBinary(rtc->year);
if (year == 0xFF)
errorFlags |= RTC_ERR_INVALID_YEAR;
month = ConvertBcdToBinary(rtc->month);
if (month == 0xFF || month == 0 || month > 12)
errorFlags |= RTC_ERR_INVALID_MONTH;
value = ConvertBcdToBinary(rtc->day);
if (value == 0xFF)
errorFlags |= RTC_ERR_INVALID_DAY;
if (month == MONTH_FEB)
{
if (value > IsLeapYear(year) + sNumDaysInMonths[month - 1])
errorFlags |= RTC_ERR_INVALID_DAY;
}
else
{
if (value > sNumDaysInMonths[month - 1])
errorFlags |= RTC_ERR_INVALID_DAY;
}
value = ConvertBcdToBinary(rtc->hour);
if (value > 24)
errorFlags |= RTC_ERR_INVALID_HOUR;
value = ConvertBcdToBinary(rtc->minute);
if (value > 60)
errorFlags |= RTC_ERR_INVALID_MINUTE;
value = ConvertBcdToBinary(rtc->second);
if (value > 60)
errorFlags |= RTC_ERR_INVALID_SECOND;
return errorFlags;
}
void RtcReset(void)
{
RtcDisableInterrupts();
SiiRtcReset();
RtcRestoreInterrupts();
}
void FormatDecimalTime(u8 *dest, s32 hour, s32 minute, s32 second)
{
dest = ConvertIntToDecimalStringN(dest, hour, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_COLON;
dest = ConvertIntToDecimalStringN(dest, minute, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_COLON;
dest = ConvertIntToDecimalStringN(dest, second, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest = EOS;
}
void FormatHexTime(u8 *dest, s32 hour, s32 minute, s32 second)
{
dest = ConvertIntToHexStringN(dest, hour, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_COLON;
dest = ConvertIntToHexStringN(dest, minute, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_COLON;
dest = ConvertIntToHexStringN(dest, second, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest = EOS;
}
void FormatHexRtcTime(u8 *dest)
{
FormatHexTime(dest, sRtc.hour, sRtc.minute, sRtc.second);
}
void FormatDecimalDate(u8 *dest, s32 year, s32 month, s32 day)
{
dest = ConvertIntToDecimalStringN(dest, year, STR_CONV_MODE_LEADING_ZEROS, 4);
*dest++ = CHAR_HYPHEN;
dest = ConvertIntToDecimalStringN(dest, month, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_HYPHEN;
dest = ConvertIntToDecimalStringN(dest, day, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest = EOS;
}
void FormatHexDate(u8 *dest, s32 year, s32 month, s32 day)
{
dest = ConvertIntToHexStringN(dest, year, STR_CONV_MODE_LEADING_ZEROS, 4);
*dest++ = CHAR_HYPHEN;
dest = ConvertIntToHexStringN(dest, month, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest++ = CHAR_HYPHEN;
dest = ConvertIntToHexStringN(dest, day, STR_CONV_MODE_LEADING_ZEROS, 2);
*dest = EOS;
}
void RtcCalcTimeDifference(struct SiiRtcInfo *rtc, struct Time *result, struct Time *t)
{
u16 days = RtcGetDayCount(rtc);
result->seconds = ConvertBcdToBinary(rtc->second) - t->seconds;
result->minutes = ConvertBcdToBinary(rtc->minute) - t->minutes;
result->hours = ConvertBcdToBinary(rtc->hour) - t->hours;
result->days = days - t->days;
if (result->seconds < 0)
{
result->seconds += 60;
--result->minutes;
}
if (result->minutes < 0)
{
result->minutes += 60;
--result->hours;
}
if (result->hours < 0)
{
result->hours += 24;
--result->days;
}
}
void RtcCalcLocalTime(void)
{
RtcGetInfo(&sRtc);
RtcCalcTimeDifference(&sRtc, &gLocalTime, &gSaveBlock2Ptr->localTimeOffset);
}
void RtcInitLocalTimeOffset(s32 hour, s32 minute)
{
RtcCalcLocalTimeOffset(0, hour, minute, 0);
}
void RtcCalcLocalTimeOffset(s32 days, s32 hours, s32 minutes, s32 seconds)
{
gLocalTime.days = days;
gLocalTime.hours = hours;
gLocalTime.minutes = minutes;
gLocalTime.seconds = seconds;
RtcGetInfo(&sRtc);
RtcCalcTimeDifference(&sRtc, &gSaveBlock2Ptr->localTimeOffset, &gLocalTime);
}
void CalcTimeDifference(struct Time *result, struct Time *t1, struct Time *t2)
{
result->seconds = t2->seconds - t1->seconds;
result->minutes = t2->minutes - t1->minutes;
result->hours = t2->hours - t1->hours;
result->days = t2->days - t1->days;
if (result->seconds < 0)
{
result->seconds += 60;
--result->minutes;
}
if (result->minutes < 0)
{
result->minutes += 60;
--result->hours;
}
if (result->hours < 0)
{
result->hours += 24;
--result->days;
}
}
u32 RtcGetMinuteCount(void)
{
RtcGetInfo(&sRtc);
return (24 * 60) * RtcGetDayCount(&sRtc) + 60 * sRtc.hour + sRtc.minute;
}
u32 RtcGetLocalDayCount(void)
{
return RtcGetDayCount(&sRtc);
}