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{$ifndef ARM7}
{$error The clock is only available on the ARM7}
{$endif ARM7}
{$ifdef NDS_INTERFACE}
const
// RTC registers
WRITE_STATUS_REG1 = $60;
READ_STATUS_REG1 = $61;
STATUS_POC = (1 shl 7); // read-only, cleared by reading (1 if just powered on)
STATUS_BLD = (1 shl 6); // read-only, cleared by reading (1 if power dropped below the safety threshold)
STATUS_INT2 = (1 shl 5); // read-only, INT2 has occurred
STATUS_INT1 = (1 shl 4); // read-only, INT1 has occurred
STATUS_SC1 = (1 shl 3); // R/W scratch bit
STATUS_SC0 = (1 shl 2); // R/W scratch bit
STATUS_24HRS = (1 shl 1); // 24 hour mode when 1, 12 hour mode when 0
STATUS_RESET = (1 shl 0); // write-only, reset when 1 written
WRITE_STATUS_REG2 = $62;
READ_STATUS_REG2 = $63;
STATUS_TEST = (1 shl 7); //
STATUS_INT2AE = (1 shl 6); //
STATUS_SC3 = (1 shl 5); // R/W scratch bit
STATUS_SC2 = (1 shl 4); // R/W scratch bit
STATUS_32kE = (1 shl 3); // Interrupt mode bits
STATUS_INT1AE = (1 shl 2); //
STATUS_INT1ME = (1 shl 1); //
STATUS_INT1FE = (1 shl 0); //
// full 7 bytes for time and date
WRITE_TIME_AND_DATE = $64;
READ_TIME_AND_DATE = $65;
// last 3 bytes of current time
WRITE_TIME = $66;
READ_TIME = $67;
WRITE_INT_REG1 = $68;
READ_INT_REG1 = $69;
READ_INT_REG2 = $6A;
WRITE_INT_REG2 = $6B;
READ_CLOCK_ADJUST_REG = $6C;
WRITE_CLOCK_ADJUST_REG = $6D;
// clock-adjustment register
READ_FREE_REG = $6E;
WRITE_FREE_REG = $6F;
procedure rtcReset(); cdecl; external;
procedure rtcTransaction(command: pcuint8; commandLength: cuint32; result: pcuint8; resultLength: cuint32); cdecl; external;
procedure rtcGetTime(time: pcuint8); cdecl; external;
procedure rtcSetTime(time: pcuint8); cdecl; external;
procedure rtcGetTimeAndDate(time: pcuint8); cdecl; external;
procedure rtcSetTimeAndDate(time: pcuint8); cdecl; external;
procedure rtcGetData(var data: cuint8; size: cuint32); cdecl; external;
procedure BCDToInteger(var data: cuint8; length: cuint32); cdecl; external;
procedure integerToBCD(var data: cuint8; length: cuint32); cdecl; external;
procedure initClockIRQ(); cdecl; external;
procedure resyncClock(); cdecl; external;
{$endif NDS_INTERFACE}
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