A: w, Ppendix, Atchdog – NEXCOM OPPC 1520T User Manual
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OPPC 1520T/1720T User Manual
Appendix A: Watchdog Timer
A
ppendix
A: W
Atchdog
t
imer
Start
See “SetupWDT” procedure
#Setup Watchdog Timer Environment
Step 1
Step 2
See “TimeBaseWDT” procedure
#Initial Watchdog Timer
Users can select second or minute
Step 3
See “TimeCountWDT” procedure
#Set Watchdog Timer Time-out Value
Users can set time-out value
Step 4
See ExitSetup procedure
#Exit Setup Environment
End
WDT Programming Guide
OPPC Series Watchdog Function Configuration Sequence Description:
Watch Dog Sample Code
#define SUPERIO_PORT 0x2E
#define WDT_SET
0x72
#define WDT_VALUE 0x73
void main(void)
{
#Enter SuperIO Configuration
outportb(SUPERIO_PORT, 0x87);
outportb(SUPERIO_PORT, 0x01);
outportb(SUPERIO_PORT, 0x55);
outportb(SUPERIO_PORT, 0x55);
# Set LDN
outportb(SUPERIO_PORT,0x07);
outportb(SUPERIO_PORT+1 ,0x07);
# Set WDT setting
outportb(WDT_SET,0xC0);
# Use the second to come down
# If choose the Minute, change
value to 0x40
# Set WDT sec/min
outportb(WDT_VALUE,0x05);
#Set 5 seconds
}