Rabbit RabbitCore RCM3305 User Manual page 152

int rn_enable_wdt(int handle, int wdttype);
Enables the hardware and/or software watchdog timers on a peripheral card. The software on the periph-
eral card will keep the hardware watchdog timer updated, but will hard reset if the time expires. The
hardware watchdog cannot be disabled except by a hard reset on the peripheral card. The software watch-
dog timer must be updated by software on the master. The peripheral card will soft reset if the timeout set
by rn_sw_wdt() expires.
card is connected to a master.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to establish the
handle.
wdttype
0 enables both hardware and software watchdog timers
1 enables hardware watchdog timer
2 enables software watchdog timer
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the peripheral
card is not connected to the master.
SEE ALSO
rn_hitwd, rn_sw_wdt
int rn_hitwd(int handle, char *count);
Hits software watchdog. Set the timeout period and enable the software watchdog prior to using this
function.
This function will
a master.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to establish the
handle.
count is a pointer to return the present count of the software watchdog timer. The equivalent time left in
seconds can be determined from count × 0.025 seconds.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the peripheral
card is not connected to the master.
SEE ALSO
rn_enable_wdt, rn_sw_wdt
146
check device information to determine that the peripheral
This function will
check device information to determine that the peripheral card is connected to
RabbitCore RCM3305/RCM3315