一种的STM32的应用喂狗方法

喂狗结构体：

typedef struct
{
    uint32 last_update;              /**< Time of the last system monitor update */
    uint32 longest_permitted_delay;  /**< Longest permitted delay between checkins with the system monitor */
} wdg_feed_t;

函数接口：

//初始化函数

void wdgFeed_start(void)
{	
    wdg_feed.last_update = Tick_Get();
    wdg_feed.longest_permitted_delay = WDG_FEED_MS;
    WDG_Refresh();
}

//喂狗时间更新，在滴答定时中断里调用

void wdgFeed_update(uint32 permitted_delay)
{
    uint32 cur_time = Tick_Get();

    /* Update the system monitor if it hasn't already passed it's permitted delay */
    if(cur_time < (wdg_feed.last_update + MS2TICK(wdg_feed.longest_permitted_delay)))
    {
        wdg_feed.last_update             = cur_time;
        wdg_feed.longest_permitted_delay = permitted_delay;
    }
}

//定时喂狗， 在应用程序中调用

void wdgFeed(void)
{
    static uint32 refresh_time = 0;