Appendix A: Programming Watchdog Timer
81
A watchdog timer is a piece of hardware that can be used to automatically detect system anomalies and
reset the processor in case there are any problems. Generally speaking, a watchdog timer is based on a
counter that counts down from an initial value to zero. The software selects the counter’s initial value and
periodically restarts it. Should the counter reach zero before the software restarts it, the software is
presumed to be malfunctioning
and the processor’s reset signal is asserted. Thus, the processor will be restarted as if a human operator had
cycled the power.
For sample watchdog code, please go to
the Lanner Support Website at
http://www.lannerinc.com/download-center/
and browse the
download center
.
To execute the sample code: enter the number of seconds to start count down before the system can be
reset. Press start to start the counter and stop to stop the counter..
Dwd_tst --swt xxx (Set Watchdog Timer 1-255 seconds)
wd_tst[*] --start (Start Watchdog Timer)
wd_tst --stop (Stop Watchdog Timer)
Summary of Contents for FW-8894
Page 1: ...FW 8894 User Manual Version 1 3 Date of Release 2017 03 13 Network Computing...
Page 9: ...For Parallel Text based LCM 84 Warranty Policy 88 RMA Service 88 RMA Service Request Form 89...
Page 43: ......
Page 53: ...Chapter 5 BIOS Setup 53 Press Enter to access the submenu...
Page 72: ...FW 8894 User Manual 72 PCH SATA Configuration...
