ADLINK PCI-8258 - Manual (Page 212)

198 Motion Control Theory
3. Reset timer continuously
After the watchdog protection mechanism is enabled, the
watchdog mechanism should be reset within timeout period
to rest the timer and retiming from beginning. In case of
timer timeout relevant events are triggered per setting given
by step 1.
Use APS_wdt_reset_counter () to reset watchdog.
• Example:
void watchdog_example()
{
// This example shows how interrupt functions work.
I32 board_id = 0;
I32 timer_no = 0; // Only timer 0 to be used
I32 time_out = 10; // Time out is 10*100 ms = 1 sec
I32 EventByBit = 0x01; // Action event is defined by bit.
// Bit0: Motor servo off
// Bit1: Digital output off
// Bit2: PWM off
I32 ret = 0; // return code
//Step 1: 姕⭂妰㗪☐妠䘤⼴䘬ḳẞ
ret = APS_wdt_set_action_event( board_id, timer_no, EventByBit );
//Step 2: ┇≽䚳攨䉿ᾅ嬟㨇⇞
ret = APS_wdt_start( board_id, timer_no, time_out );
// ἧ䓐侭䘬timer炻while loop炻ㆾ侭㗗⎗⚆ㅱ溆
timer(500ms) // 㭷500ms⍣慵伖ᶨ㫉妰㗪☐
{
//Step 3: ᶵ攻㕟䘬慵伖妰㗪☐
ret = APS_wdt_reset_counter( board_id, timer_no );
…Do Something
}
}