Lanner LEC-2010 Manuel d'utilisateur télécharger pdf (Page 59)

LEC-2010 Fanless Embedded System User’s Manual

help();

return -1;

}

if( strcmp(argv[1], "-wr") == 0 )

{

if( argc != 3 )

{

help();

return -1;

}

write_w83627_reg(0x8, 0xf6, 0); //LDN=8, CRF6, stop timer first

//clear status bit

write_w83627_reg(0x8, 0xf7, read_w83627_reg(0x8, 0xf7) & 0xef);

time = atoi(argv[2]);

printf("Setting Watchdog timer for System Reset...\n");

set_watchdog(time);

return 0;

}

else

{

help();

return -1;

}

return 0;

}

int set_watchdog(int time)

{

int temp;

outportb(INDEX_PORT, 0x87);

delay(1);

outportb(INDEX_PORT, 0x87); //Entering

W83627HF Configuration

temp = read_w83627_reg(0, 0x2b); //LDN=0, CR2B

temp &= 0xf3;

temp |= 0x04;

write_w83627_reg(0, 0x2b, temp); //set watchdog pin

write_w83627_reg(0x8, 0xf6, 0); //LDN=8, CRF6, stop timer first

write_w83627_reg(0x8, 0xf5, read_w83627_reg(0x8, 0xf5) & 0xf7); //;set

second

write_w83627_reg(0x8, 0xf7, read_w83627_reg(0x8, 0xf7) & 0xef); //;clear

status

write_w83627_reg(0x8, 0x30, read_w83627_reg(0x8, 0x30) | 0x01); //;enable

LDN8

temp = time;

write_w83627_reg(0x8, 0xf6, temp); //LDN=8, CRF6, set

watchdog timer time-out value

outportb(INDEX_PORT, 0xaa); //Exit W83627HF

Configuration

return 0;

}

int read_w83627_reg(int LDN, int reg)

{

outportb(INDEX_PORT, 0x07); //LDN register

delay(1);

outportb(DATA_PORT, LDN);

delay(1);

outportb(INDEX_PORT, reg);

delay(1);

return inportb(DATA_PORT);

}

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Lanner LEC-2010 Manuel d'utilisateur Page 59

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