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-rw-r--r--src/engine/siirtc.c432
1 files changed, 0 insertions, 432 deletions
diff --git a/src/engine/siirtc.c b/src/engine/siirtc.c
deleted file mode 100644
index 965a068f1..000000000
--- a/src/engine/siirtc.c
+++ /dev/null
@@ -1,432 +0,0 @@
-// Ruby/Sapphire/Emerald cartridges contain a Seiko Instruments Inc. (SII)
-// S-3511A real-time clock (RTC). This library ("SIIRTC_V001") is for
-// communicating with the RTC.
-
-#include "gba/gba.h"
-#include "siirtc.h"
-
-#define STATUS_INTFE 0x02 // frequency interrupt enable
-#define STATUS_INTME 0x08 // per-minute interrupt enable
-#define STATUS_INTAE 0x20 // alarm interrupt enable
-#define STATUS_24HOUR 0x40 // 0: 12-hour mode, 1: 24-hour mode
-#define STATUS_POWER 0x80 // power on or power failure occurred
-
-#define TEST_MODE 0x80 // flag in the "second" byte
-
-#define ALARM_AM 0x00
-#define ALARM_PM 0x80
-
-#define OFFSET_YEAR offsetof(struct SiiRtcInfo, year)
-#define OFFSET_MONTH offsetof(struct SiiRtcInfo, month)
-#define OFFSET_DAY offsetof(struct SiiRtcInfo, day)
-#define OFFSET_DAY_OF_WEEK offsetof(struct SiiRtcInfo, dayOfWeek)
-#define OFFSET_HOUR offsetof(struct SiiRtcInfo, hour)
-#define OFFSET_MINUTE offsetof(struct SiiRtcInfo, minute)
-#define OFFSET_SECOND offsetof(struct SiiRtcInfo, second)
-#define OFFSET_STATUS offsetof(struct SiiRtcInfo, status)
-#define OFFSET_ALARM_HOUR offsetof(struct SiiRtcInfo, alarmHour)
-#define OFFSET_ALARM_MINUTE offsetof(struct SiiRtcInfo, alarmMinute)
-
-#define INFO_BUF(info, index) (*((u8 *)(info) + (index)))
-
-#define DATETIME_BUF(info, index) INFO_BUF(info, OFFSET_YEAR + index)
-#define DATETIME_BUF_LEN (OFFSET_SECOND - OFFSET_YEAR + 1)
-
-#define TIME_BUF(info, index) INFO_BUF(info, OFFSET_HOUR + index)
-#define TIME_BUF_LEN (OFFSET_SECOND - OFFSET_HOUR + 1)
-
-#define WR 0 // command for writing data
-#define RD 1 // command for reading data
-
-#define CMD(n) (0x60 | (n << 1))
-
-#define CMD_RESET CMD(0)
-#define CMD_STATUS CMD(1)
-#define CMD_DATETIME CMD(2)
-#define CMD_TIME CMD(3)
-#define CMD_ALARM CMD(4)
-
-#define GPIO_PORT_DATA (*(vu16 *)0x80000C4)
-#define GPIO_PORT_DIRECTION (*(vu16 *)0x80000C6)
-#define GPIO_PORT_READ_ENABLE (*(vu16 *)0x80000C8)
-
-extern vu16 GPIOPortDirection;
-
-static u16 sDummy; // unused variable
-static bool8 sLocked;
-
-static int WriteCommand(u8 value);
-static int WriteData(u8 value);
-static u8 ReadData();
-static void EnableGpioPortRead();
-static void DisableGpioPortRead();
-
-static const char AgbLibRtcVersion[] = "SIIRTC_V001";
-
-void SiiRtcUnprotect()
-{
- EnableGpioPortRead();
- sLocked = FALSE;
-}
-
-void SiiRtcProtect()
-{
- DisableGpioPortRead();
- sLocked = TRUE;
-}
-
-u8 SiiRtcProbe()
-{
- u8 errorCode;
- struct SiiRtcInfo rtc;
-
- if (!SiiRtcGetStatus(&rtc))
- return 0;
-
- errorCode = 0;
-
- if ((rtc.status & (SIIRTCINFO_POWER | SIIRTCINFO_24HOUR)) == SIIRTCINFO_POWER
- || (rtc.status & (SIIRTCINFO_POWER | SIIRTCINFO_24HOUR)) == 0)
- {
- // The RTC is in 12-hour mode. Reset it and switch to 24-hour mode.
-
- // Note that the conditions are redundant and equivalent to simply
- // "(rtc.status & SIIRTCINFO_24HOUR) == 0". It's possible that this
- // was also intended to handle resetting the clock after power failure
- // but a mistake was made.
-
- if (!SiiRtcReset())
- return 0;
-
- errorCode++;
- }
-
- SiiRtcGetTime(&rtc);
-
- if (rtc.second & TEST_MODE)
- {
- // The RTC is in test mode. Reset it to leave test mode.
-
- if (!SiiRtcReset())
- return (errorCode << 4) & 0xF0;
-
- errorCode++;
- }
-
- return (errorCode << 4) | 1;
-}
-
-bool8 SiiRtcReset()
-{
- u8 result;
- struct SiiRtcInfo rtc;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_RESET | WR);
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- rtc.status = SIIRTCINFO_24HOUR;
-
- result = SiiRtcSetStatus(&rtc);
-
- return result;
-}
-
-bool8 SiiRtcGetStatus(struct SiiRtcInfo *rtc)
-{
- u8 statusData;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_STATUS | RD);
-
- GPIO_PORT_DIRECTION = 5;
-
- statusData = ReadData();
-
- rtc->status = (statusData & (STATUS_POWER | STATUS_24HOUR))
- | ((statusData & STATUS_INTAE) >> 3)
- | ((statusData & STATUS_INTME) >> 2)
- | ((statusData & STATUS_INTFE) >> 1);
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcSetStatus(struct SiiRtcInfo *rtc)
-{
- u8 statusData;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- statusData = STATUS_24HOUR
- | ((rtc->status & SIIRTCINFO_INTAE) << 3)
- | ((rtc->status & SIIRTCINFO_INTME) << 2)
- | ((rtc->status & SIIRTCINFO_INTFE) << 1);
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_STATUS | WR);
-
- WriteData(statusData);
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcGetDateTime(struct SiiRtcInfo *rtc)
-{
- u8 i;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_DATETIME | RD);
-
- GPIO_PORT_DIRECTION = 5;
-
- for (i = 0; i < DATETIME_BUF_LEN; i++)
- DATETIME_BUF(rtc, i) = ReadData();
-
- INFO_BUF(rtc, OFFSET_HOUR) &= 0x7F;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcSetDateTime(struct SiiRtcInfo *rtc)
-{
- u8 i;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_DATETIME | WR);
-
- for (i = 0; i < DATETIME_BUF_LEN; i++)
- WriteData(DATETIME_BUF(rtc, i));
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcGetTime(struct SiiRtcInfo *rtc)
-{
- u8 i;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_TIME | RD);
-
- GPIO_PORT_DIRECTION = 5;
-
- for (i = 0; i < TIME_BUF_LEN; i++)
- TIME_BUF(rtc, i) = ReadData();
-
- INFO_BUF(rtc, OFFSET_HOUR) &= 0x7F;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcSetTime(struct SiiRtcInfo *rtc)
-{
- u8 i;
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIO_PORT_DIRECTION = 7;
-
- WriteCommand(CMD_TIME | WR);
-
- for (i = 0; i < TIME_BUF_LEN; i++)
- WriteData(TIME_BUF(rtc, i));
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-bool8 SiiRtcSetAlarm(struct SiiRtcInfo *rtc)
-{
- u8 i;
- u8 alarmData[2];
-
- if (sLocked == TRUE)
- return FALSE;
-
- sLocked = TRUE;
-
- // Decode BCD.
- alarmData[0] = (rtc->alarmHour & 0xF) + 10 * ((rtc->alarmHour >> 4) & 0xF);
-
- // The AM/PM flag must be set correctly even in 24-hour mode.
-
- if (alarmData[0] < 12)
- alarmData[0] = rtc->alarmHour | ALARM_AM;
- else
- alarmData[0] = rtc->alarmHour | ALARM_PM;
-
- alarmData[1] = rtc->alarmMinute;
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 5;
-
- GPIOPortDirection = 7; // Why is this the only instance that uses a symbol?
-
- WriteCommand(CMD_ALARM | WR);
-
- for (i = 0; i < 2; i++)
- WriteData(alarmData[i]);
-
- GPIO_PORT_DATA = 1;
- GPIO_PORT_DATA = 1;
-
- sLocked = FALSE;
-
- return TRUE;
-}
-
-static int WriteCommand(u8 value)
-{
- u8 i;
- u8 temp;
-
- for (i = 0; i < 8; i++)
- {
- temp = ((value >> (7 - i)) & 1);
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 5;
- }
-
- // control reaches end of non-void function
-}
-
-static int WriteData(u8 value)
-{
- u8 i;
- u8 temp;
-
- for (i = 0; i < 8; i++)
- {
- temp = ((value >> i) & 1);
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 4;
- GPIO_PORT_DATA = (temp << 1) | 5;
- }
-
- // control reaches end of non-void function
-}
-
-static u8 ReadData()
-{
- u8 i;
- u8 temp;
- u8 value;
-
- for (i = 0; i < 8; i++)
- {
- GPIO_PORT_DATA = 4;
- GPIO_PORT_DATA = 4;
- GPIO_PORT_DATA = 4;
- GPIO_PORT_DATA = 4;
- GPIO_PORT_DATA = 4;
- GPIO_PORT_DATA = 5;
-
- temp = ((GPIO_PORT_DATA & 2) >> 1);
- value = (value >> 1) | (temp << 7); // UB: accessing uninitialized var
- }
-
- return value;
-}
-
-static void EnableGpioPortRead()
-{
- GPIO_PORT_READ_ENABLE = 1;
-}
-
-static void DisableGpioPortRead()
-{
- GPIO_PORT_READ_ENABLE = 0;
-}
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