ShuriZma
/
melonDS
mirror of https://github.com/melonDS-emu/melonDS.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

make the date/time registers writable

This commit is contained in:
Arisotura 2023-10-26 19:56:38 +02:00
parent a1a6d0ddb8
commit cb09bd414b
1 changed files with 121 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

144
src/RTC.cpp
View File

@ -85,6 +85,7 @@ void Reset()
CurCmd = 0;
MinuteCount = 0;
ResetRegisters();
ClockCount = 0;
@ -137,7 +138,6 @@ void ResetRegisters()
ClockAdjust = 0;
FreeReg = 0;
MinuteCount = 0;
FOUT1 = 0;
FOUT2 = 0;
memset(AlarmDate1, 0, sizeof(AlarmDate1));
@ -145,6 +145,11 @@ void ResetRegisters()
}
u8 BCD(u8 val)
{
return (val % 10) | ((val / 10) << 4);
}
u8 BCDIncrement(u8 val)
{
val++;
@ -155,6 +160,18 @@ u8 BCDIncrement(u8 val)
return val;
}
u8 BCDSanitize(u8 val, u8 vmin, u8 vmax)
{
if (val < vmin || val > vmax)
val = vmin;
else if ((val & 0x0F) >= 0x0A)
val = vmin;
else if ((val & 0xF0) >= 0xA0)
val = vmin;
return val;
}
u8 DaysInMonth()
{
u8 numdays;
@ -213,6 +230,15 @@ void CountMonth()
}
}
void CheckEndOfMonth()
{
if (DateTime[2] > DaysInMonth())
{
DateTime[2] = 1;
CountMonth();
}
}
void CountDay()
{
// day-of-week counter
@ -221,11 +247,7 @@ void CountDay()
// day counter
DateTime[2] = BCDIncrement(DateTime[2]);
if (DateTime[2] > DaysInMonth())
{
DateTime[2] = 1;
CountMonth();
}
CheckEndOfMonth();
}
void CountHour()
@ -309,11 +331,59 @@ void ClockTimer(u32 param)
}
u8 BCD(u8 val)
void WriteDateTime(int num, u8 val)
{
return (val % 10) | ((val / 10) << 4);
}
switch (num)
{
case 1: // year
DateTime[0] = BCDSanitize(val, 0x00, 0x99);
break;
case 2: // month
DateTime[1] = BCDSanitize(val & 0x1F, 0x01, 0x12);
break;
case 3: // day
DateTime[2] = BCDSanitize(val & 0x3F, 0x01, 0x31);
CheckEndOfMonth();
break;
case 4: // day of week
DateTime[3] = BCDSanitize(val & 0x07, 0x00, 0x06);
break;
case 5: // hour
{
u8 hour = val & 0x3F;
u8 pm = val & 0x40;
if (StatusReg1 & (1<<1))
{
// 24-hour mode
hour = BCDSanitize(hour, 0x00, 0x23);
pm = (hour >= 0x12) ? 0x40 : 0;
}
else
{
// 12-hour mode
hour = BCDSanitize(hour, 0x00, 0x11);
}
DateTime[4] = hour | pm;
}
break;
case 6: // minute
DateTime[5] = BCDSanitize(val & 0x7F, 0x00, 0x59);
break;
case 7: // second
DateTime[6] = BCDSanitize(val & 0x7F, 0x00, 0x59);
break;
}
}
void CmdRead()
{
@ -412,43 +482,67 @@ void CmdWrite(u8 val)
switch (CurCmd & 0x70)
{
case 0x00:
if (InputPos == 1) StatusReg1 = val & 0x0E;
if (InputPos == 1)
{
u8 oldval = StatusReg1;
if (val & (1<<0)) // reset
ResetRegisters();
StatusReg1 = (StatusReg1 & 0xF0) | (val & 0x0E);
if ((StatusReg1 ^ oldval) & (1<<1)) // AM/PM changed
WriteDateTime(5, DateTime[4]);
}
break;
case 0x40:
if (InputPos == 1) StatusReg2 = val;
if (StatusReg2 & 0x4F) Log(LogLevel::Debug, "RTC INTERRUPT ON: %02X\n", StatusReg2);
if (InputPos == 1)
{
StatusReg2 = val;
if (StatusReg2 & 0x4F) Log(LogLevel::Debug, "RTC INTERRUPT ON: %02X\n", StatusReg2);
}
break;
case 0x20:
// TODO: set time somehow??
if (InputPos <= 7)
WriteDateTime(InputPos, val);
break;
case 0x60:
// same shit
if (InputPos <= 3)
WriteDateTime(InputPos+4, val);
break;
case 0x10:
if (StatusReg2 & 0x04)
{
if (InputPos <= 3) Alarm1[InputPos-1] = val;
if (InputPos <= 3)
Alarm1[InputPos-1] = val;
}
else
{
if (InputPos == 1) Alarm1[2] = val;
if (InputPos == 1)
Alarm1[2] = val;
}
break;
case 0x50:
if (InputPos <= 3) Alarm2[InputPos-1] = val;
if (InputPos <= 3)
Alarm2[InputPos-1] = val;
break;
case 0x30:
if (InputPos == 1) ClockAdjust = val;
if (InputPos == 1)
{
ClockAdjust = val;
Log(LogLevel::Debug, "RTC: CLOCK ADJUST = %02X\n", val);
}
break;
case 0x70:
if (InputPos == 1) FreeReg = val;
if (InputPos == 1)
FreeReg = val;
break;
}
@ -469,19 +563,23 @@ void CmdWrite(u8 val)
break;
case 0x40:
if (InputPos == 1) FOUT1 = val;
if (InputPos == 1)
FOUT1 = val;
break;
case 0x20:
if (InputPos == 1) FOUT2 = val;
if (InputPos == 1)
FOUT2 = val;
break;
case 0x10:
if (InputPos <= 3) AlarmDate1[InputPos-1] = val;
if (InputPos <= 3)
AlarmDate1[InputPos-1] = val;
break;
case 0x50:
if (InputPos <= 3) AlarmDate2[InputPos-1] = val;
if (InputPos <= 3)
AlarmDate2[InputPos-1] = val;
break;
default: