Advantech RSB-4210 Evaluation Kit User Manual download pdf (Page 97)

89 RSB-4210 User Manual

Chapter 3 Software Functionality

WDIOF_POWERUNDER Power bad/power fault

The machine is showing an undervoltage status

WDIOF_CARDRESET Card previously reset the CPU

The last reboot was caused by the watchdog card

WDIOF_POWEROVER Power over voltage

The machine is showing an overvoltage status. Note that if one level is under and

one over both bits will be set - this may seem odd but makes sense.

WDIOF_KEEPALIVEPING Keep alive ping reply

The watchdog saw a keepalive ping since it was last queried.

WDIOF_SETTIMEOUT Can set/get the timeout

The watchdog can do pretimeouts.

WDIOF_PRETIMEOUT Pretimeout (in seconds), get/set

For those drivers that return any bits set in the option field, the GETSTATUS and

GETBOOTSTATUS ioctls can be used to ask for the current status, and the status at

the last reboot, respectively.

int flags;

ioctl(fd, WDIOC_GETSTATUS, &flags);

ioctl(fd, WDIOC_GETBOOTSTATUS, &flags);

Note that not all devices support these two calls, and some only support the GET-

BOOTSTATUS call.

Some drivers can measure the temperature using the GETTEMP ioctl. The returned

value is the temperature in degrees fahrenheit.

int temperature;

ioctl(fd, WDIOC_GETTEMP, &temperature);

Finally the SETOPTIONS ioctl can be used to control some aspects of the cards

operation.

int options = 0;

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Advantech RSB-4210 Evaluation Kit User Manual Page 97