Aaeon PFM-HDS Manual do Utilizador descarregar pdf (Página 86)

PC/104 Module PFM-HDS

Appendix A Programming the Watchdog Timer A-5

WDTSetBit(TimerReg, ModeBit, ModeVal);

// WDT output mode set to active low

WDTSetBit(

TimerReg, PolarityBit, PolarityVal);

// WDT output pulse width is 25ms

WDTSetBit(

TimerReg, PSWidthBit, PSWidthVal);

// Watchdog WDTRST# Enable

WDTSetBit(

DevReg, WDTRstBit, WDTRstVal);

}

VOID

WDTClearTimeoutStatus(){

WDTSetBit(

TimerReg, StatusBit, 1);

}

**************************************************************************

*****

**************************************************************************

*****

VOID

WDTWriteByte(byte Register, byte Value){

IOWriteByte(WDTAddr+Register, Value);

}

byte

WDTReadByte(byte Register){

return IOReadByte(WDTAddr+Register);

}

VOID

WDTSetBit(byte Register, byte Bit, byte Val){

byte TmpValue;

TmpValue = WDTReadByte(Register);

TmpValue &= ~(1 << Bit);

TmpValue |= Val << Bit;

WDTWriteByte(Register, TmpValue);

}

**************************************************************************

*****

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Aaeon PFM-HDS Manual do Utilizador Página 86