dtu_simple/app/HW/source/wwdgt.c

#include "wwdgt.h"

void watchdog_init(void)
{
		rcu_osci_on(RCU_IRC40K);                            /* 使能IRC40K时钟 */
    while(SUCCESS != rcu_osci_stab_wait(RCU_IRC40K));   /* wait till IRC40K is ready */
    fwdgt_write_enable();
    fwdgt_config(2500, FWDGT_PSC_DIV16);                /* 40K / 16 = 2.5 KHz t = 1/2.5 *2500 = 1s; 1S超时 */
    fwdgt_write_disable();
//    fwdgt_enable();
}

// 独立看门狗喂狗
void feed_fwdg()
{
    fwdgt_write_enable();
    fwdgt_counter_reload();
    fwdgt_write_disable();    
}