Dfi HM920-HM86 Uživatelský manuál stáhnout pdf (Strana 95)

www.dﬁ .comAppendix B Watchdog Sample Code

Appendix B

Appendix B - Watchdog Sample Code

#include <stdio.h>

//--------------------------------------------------------------

#deﬁ ne EC_EnablePort 0x66

#deﬁ ne EC_DataPort 0x62

//--------------------------------------------------------------

void WriteEC(char,int);

void SetWDTime(int,int);

int GetWDTime(void);

//--------------------------------------------------------------

main()

{

unsigned int countdown;

unsigned int input,count_h,count_l;

printf("Input WD Time: ");

scanf("%d",&input);

printf("\n");

count_h=input>>8;

count_l=input&0x00FF;

SetWDTime(count_h,count_l);

while(1)

{

countdown = GetWDTime();

delay(100);

printf("\rTime Remaining: %d ",countdown);

}

//--------------------------------------------------------------

void SetWDTime(int count_H,int count_L)

{

//Set Count

WriteEC(0xB5,count_H); //High Byte

WriteEC(0xB6,count_L); //Low Byte

//Enable Watch Dog Timer

WriteEC(0xB4,0x01);

}

//--------------------------------------------------------------

int GetWDTime(void)

{

int sum,data_h,data_l;

//Select EC Read Type

outportb(EC_EnablePort,0x80);

delay(5);

//Get Remaining Count High Byte

outportb(EC_DataPort,0xF4);

delay(5);

data_h=inportb(EC_DataPort);

delay(5);

//Select EC Read Type

outportb(EC_EnablePort,0x80);

delay(5);

//Get Remaining Count Low Byte

outportb(EC_DataPort,0xF5);

delay(5);

data_l=inportb(EC_DataPort);

delay(5);

data_h<<=8;

data_h&=0xFF00;

sum=data_h|data_l;

return sum;

}

//--------------------------------------------------------------

void WriteEC(char EC_Addr, int data)

{

//Select EC Write Type

outportb(EC_EnablePort,0x81);

delay(5);

outportb(EC_DataPort,EC_Addr);

delay(5);

outportb(EC_DataPort,data);

delay(5);

}

//--------------------------------------------------------------

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