Appendix A: Watchdog Programming Guide - Nexcom NDIS M537 User Manual

Appendix A: Watchdog Programming Guide

a a: W
PPendIx
NDiS M537 features a watchdog timer that resets the CPU or generates an
interrupt if the processor stops operating for any reason. This feature ensures
system reliability in industrial standalone or unmanned environments.
#define SUPERIO_PORT 0x2E
#define WDT_SET 0xF0
#define WDT_VALUE 0xF1
void main(void)
{
#Enter SuperIO Configuration
outportb(SUPERIO_PORT, 0x87);
outportb(SUPERIO_PORT, 0x87);
# Set LDN
outportb(SUPERIO_PORT, 0x07);
outportb(SUPERIO_PORT+1 ,0x08);
# Set WDT setting
outportb(SUPERIO_PORT, WDT_SET);
outportb(SUPERIO_PORT+1, 0x00)
# Set WDT sec/min
outportb(SUPERIO_PORT, WDT_VALUE);
outportb(SUPERIO_PORT+1, 0x05);
}
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P
atChdog rogrammIng
# Use the second
# Use the minute, change value to 0x08
#Set 5 seconds
g
uIde
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NDiS M537 User Manual