Aaeon PCM-6893 - Page 64

Compact Board PCM- 6893
Appendix A Programming the Watchdog Timer A-3
outportb(IO_INDEX_PORT, UNLOCK_DATA);
}
void ExitConfigMode()
{
outportb(IO_INDEX_PORT, LOCK_DATA);
}
void SelectDevice(unsigned char device)
{
outportb(IO_INDEX_PORT, DEVICE_REGISTER);
outportb(IO_DATA_PORT, device);
}
unsigned char ReadAData(short int reg)
{
outportb(IO_INDEX_PORT, reg);
return (inportb(IO_DATA_PORT));
}
void WriteAData(unsigned char reg, unsigned char data)
{
outportb(IO_INDEX_PORT, reg);
outportb(IO_DATA_PORT, data);
}
void SetWatchDogTime(unsigned char time_val)
{
EnterConfigMode();
SelectDevice(8);