{"id":118030,"date":"2026-10-26T04:49:14","date_gmt":"2026-10-25T20:49:14","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/118030.html"},"modified":"2026-10-26T04:49:14","modified_gmt":"2026-10-25T20:49:14","slug":"%e3%80%90stm32%e3%80%91-%e5%86%85%e9%83%a8%e7%9c%8b%e9%97%a8%e7%8b%97%e4%b8%8e%e5%a4%96%e9%83%a8%e7%a1%ac%e4%bb%b6%e7%9c%8b%e9%97%a8%e7%8b%97%e6%a1%88%e4%be%8b%e9%aa%8c%e8%af%81%e5%ae%9e%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/118030.html","title":{"rendered":"\u3010STM32\u3011 \u5185\u90e8\u770b\u95e8\u72d7\u4e0e\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u6848\u4f8b\u9a8c\u8bc1\u5b9e\u5f55"},"content":{"rendered":"

\"\"<\/p>\n

\n

\u00a0\u00a0<\/span><\/span>STM32 \u5185\u90e8\u770b\u95e8\u72d7\u4e0e\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u6848\u4f8b\u9a8c\u8bc1\u5b9e\u5f55\u00a0 \u00a0<\/span><\/span><\/h2>\n

\u4e00\u3001\u4e3a\u4ec0\u4e48\u8981\u804a\u770b\u95e8\u72d7<\/span><\/h3>\n

\u8bbe\u5907\u4ea4\u4ed8\u5230\u73b0\u573a\u540e，\u6700\u6015\u7684\u4e0d\u662f\u529f\u80fd\u4e0d\u5bf9，\u800c\u662f\u201c\u4e0d\u56de\u4e86\u201d：<\/span><\/p>\n

    \n
  • \u5ba2\u6237\u6253\u7535\u8bdd\u6765\u8bf4\u8bbe\u5907\u6ca1\u53cd\u5e94，\u53ea\u80fd\u8ba9\u7528\u6237\u65ad\u7535\u91cd\u542f；<\/span><\/li>\n
  • \u8bbe\u5907\u88c5\u5728\u94c1\u5854\u3001\u4e95\u76d6\u3001\u504f\u8fdc\u7684\u6cf5\u7ad9\u91cc，\u6839\u672c\u6ca1\u6cd5\u6d3e\u4eba\u53bb\u6309\u590d\u4f4d\u952e；<\/span><\/li>\n
  • OTA \u4e4b\u540e\u5076\u53d1\u6b7b\u673a，\u5b9e\u9a8c\u5ba4\u91cc\u5374\u600e\u4e48\u4e5f\u590d\u73b0\u4e0d\u51fa\u6765\u3002<\/span><\/li>\n<\/ul>\n

    \u770b\u95e8\u72d7（Watchdog）\u5c31\u662f\u89e3\u51b3\u8fd9\u7c7b\u95ee\u9898\u7684\u6700\u540e\u4e00\u9053\u9632\u7ebf：<\/span><\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f53\u7a0b\u5e8f\u5931\u53bb\u54cd\u5e94\u65f6，\u5f3a\u5236\u590d\u4f4d\u82af\u7247\u3002<\/span><\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f46\u5f88\u591a\u5de5\u7a0b\u5e08\u53ea\u505c\u7559\u5728\u201c\u5f00\u4e86\u4e2a IWDG\u201d\u7684\u5c42\u9762，\u8bef\u4ee5\u4e3a\u8fd9\u6837\u5c31\u9ad8\u6795\u65e0\u5fe7\u4e86\u3002<\/span><\/p>\n

    \u4e8c\u3001\u5148\u5206\u6e05\u4e09\u4e2a\u201c\u770b\u95e8\u72d7\u201d<\/span><\/h3>\n\n\u7279\u6027<\/span><\/p>\n

    IWDG<\/span><\/p>\n

    （\u72ec\u7acb\u770b\u95e8\u72d7）<\/span><\/p>\n

    WWDG<\/span><\/p>\n

    （\u7a97\u53e3\u770b\u95e8\u72d7）<\/span><\/p>\n

    \u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7<\/span><\/p>\n

    （\u5982 TPS3823）<\/span><\/p>\n<\/tr>\n

    \n\n\n\n\n\n\n\n\n
    \u65f6\u949f\u6e90<\/span><\/td>\n\u72ec\u7acb LSI（\u7ea6 32\/40kHz）<\/span><\/td>\nPCLK1<\/span><\/td>\n\u82af\u7247\u81ea\u5e26 RC \u632f\u8361\u5668<\/span><\/td>\n<\/tr>\n
    \u5582\u72d7\u65b9\u5f0f<\/span><\/td>\n\u5411 KR \u5199 0xAAAA<\/span><\/td>\n\u5728\u65f6\u95f4\u7a97\u53e3\u5185\u5199 CR<\/span><\/td>\n\u5728\u8d85\u65f6\u524d\u7ed9 WDI \u5f15\u811a\u4e00\u4e2a\u7535\u5e73\u7ffb\u8f6c<\/span><\/td>\n<\/tr>\n
    \u5582\u592a\u5feb<\/span><\/td>\n\u5141\u8bb8<\/span><\/td>\n\u590d\u4f4d（\u7a97\u53e3\u671f\u5582\u72d7）<\/span><\/td>\n\u901a\u5e38\u5141\u8bb8（\u8fb9\u6cbf\u68c0\u6d4b）<\/span><\/td>\n<\/tr>\n
    \u5582\u592a\u6162<\/span><\/td>\n\u590d\u4f4d<\/span><\/td>\n\u590d\u4f4d<\/span><\/td>\n\u590d\u4f4d<\/span><\/td>\n<\/tr>\n
    \u7a0b\u5e8f\u8dd1\u98de\u540e\u80fd\u5426\u88ab\u6539\u914d\u7f6e<\/span><\/td>\n\u80fd（\u540c\u4e00\u9897\u82af\u7247，\u5bc4\u5b58\u5668\u53ef\u88ab\u8bef\u5199）<\/span><\/td>\n\u80fd<\/span><\/td>\n\u4e0d\u80fd（\u7269\u7406\u9694\u79bb）<\/span><\/td>\n<\/tr>\n
    \u8c03\u8bd5\u5668 Halt \u65f6<\/span><\/td>\n\u53ef\u9009\u51bb\u7ed3<\/span><\/td>\n\u9ed8\u8ba4\u6682\u505c（\u53ef\u914d）<\/span><\/td>\n\u7167\u5e38\u8ba1\u65f6，\u7167\u6837\u54ac\u4eba<\/span><\/td>\n<\/tr>\n
    MCU \u65f6\u949f\/\u7535\u6e90\u5f02\u5e38<\/span><\/td>\n\u65f6\u949f\u574f\u2192\u5931\u6548<\/span><\/td>\n\u65f6\u949f\u574f\u2192\u5931\u6548<\/span><\/td>\n\u7535\u538b\u76d1\u63a7 + \u590d\u4f4d\u8f93\u51fa\u4ecd\u6709\u6548<\/span><\/td>\n<\/tr>\n
    \u6210\u672c<\/span><\/td>\n0<\/span><\/td>\n0<\/span><\/td>\n\u4e00\u9897\u82af\u7247 + \u4e00\u4e2a\u7535\u963b<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\u4f60\u60f3\u76d1\u63a7\u4ec0\u4e48<\/span>\u9009\u8c01<\/span><\/tr>\n\n\n\n\n\n\n\n\n
    \u4e3b\u7a0b\u5e8f\u6b7b\u5faa\u73af\u3001\u8dd1\u98de\u3001\u5361\u6b7b<\/span><\/td>\nIWDG \u6216\u5916\u90e8\u72d7<\/span><\/td>\n<\/tr>\n
    \u4e3b\u7a0b\u5e8f\u65f6\u5e8f\u5f02\u5e38（\u4efb\u52a1\u5468\u671f\u4e0d\u7a33\u5b9a）<\/span><\/td>\nWWDG<\/span><\/td>\n<\/tr>\n
    \u8dd1\u98de\u540e\u6070\u597d\u8df3\u5230\u5582\u72d7\u4ee3\u7801<\/span><\/td>\nWWDG（\u7a97\u53e3\u673a\u5236\u9632\u8fd9\u4e2a）<\/span><\/td>\n<\/tr>\n
    \u9700\u8981\u590d\u4f4d\u524d\u505a\u7d27\u6025\u5904\u7406<\/span><\/td>\nWWDG（EWI \u4e2d\u65ad）<\/span><\/td>\n<\/tr>\n
    MCU \u6574\u7247\u6b7b\u673a\u3001\u7535\u6e90\u5f02\u5e38<\/span><\/td>\n\u5916\u90e8\u72d7\u82af\u7247<\/span><\/td>\n<\/tr>\n
    \u4e3b\u65f6\u949f\u505c\u632f<\/span><\/td>\n\u5916\u90e8\u72d7\u82af\u7247（WWDG \u968f\u4e3b\u65f6\u949f\u6b7b）<\/span><\/td>\n<\/tr>\n
    \u9ad8\u53ef\u9760\u5de5\u4e1a \/ \u6c7d\u8f66<\/span><\/td>\n\u5916\u90e8\u72d7\u82af\u7247（WWDG \u4e0d\u591f\u72ec\u7acb）<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\u5bf9\u6bd4\u9879<\/span>WWDG \u7a97\u53e3\u770b\u95e8\u72d7<\/span>\u5916\u90e8\u786c\u4ef6\u72d7\u82af\u7247<\/span><\/tr>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    \u4f4d\u7f6e<\/span><\/td>\nSTM32 \u7247\u5185<\/span><\/td>\n\u72ec\u7acb\u82af\u7247（MAX6369\/SP706\/CAT823）<\/span><\/td>\n<\/tr>\n
    \u65f6\u949f\u6e90<\/span><\/td>\nAPB1 \u4e3b\u65f6\u949f（PCLK1，\u6700\u9ad8 45MHz）<\/span><\/td>\n\u5916\u90e8\u72ec\u7acb RC \u632f\u8361\u5668<\/span><\/td>\n<\/tr>\n
    \u8ba1\u6570\u5668<\/span><\/td>\n7 \u4f4d\u9012\u51cf（T [6:0]）<\/span><\/td>\n\u5916\u90e8 RC + \u56fa\u5b9a\u8ba1\u6570\u5668<\/span><\/td>\n<\/tr>\n
    \u8d85\u65f6\u8303\u56f4<\/span><\/td>\n\u6781\u77ed：~0.1ms ~ 58ms<\/span><\/td>\n\u901a\u5e38 100ms ~ \u51e0 \u79d2（\u9760\u7535\u5bb9\u8c03）<\/span><\/td>\n<\/tr>\n
    \u5582\u72d7\u65f6\u673a<\/span><\/td>\n\u5fc5\u987b\u5728\u7a97\u53e3\u5185\u5582，\u592a\u65e9 \/ \u592a\u665a\u90fd\u590d\u4f4d<\/span><\/td>\n\u4efb\u4f55\u65f6\u5019\u5582\u90fd\u884c，\u8d85\u65f6\u624d\u590d\u4f4d<\/span><\/td>\n<\/tr>\n
    \u590d\u4f4d\u6761\u4ef6<\/span><\/td>\n\u8ba1\u6570\u5668 < \u7a97\u53e3\u4e0b\u9650 \u6216 > \u4e0a\u9650<\/span><\/td>\n\u8ba1\u6570\u5668\u51cf\u5230 0<\/span><\/td>\n<\/tr>\n
    \u65e9\u671f\u4e2d\u65ad<\/span><\/td>\n\u6709 EWI \u63d0\u524d\u5524\u9192\u4e2d\u65ad<\/span><\/td>\n\u65e0（\u7eaf\u786c\u4ef6\u590d\u4f4d）<\/span><\/td>\n<\/tr>\n
    \u4f4e\u529f\u8017<\/span><\/td>\n\u968f\u4e3b\u65f6\u949f\u505c<\/span><\/td>\n\u72ec\u7acb\u4f9b\u7535\u7ee7\u7eed\u8dd1<\/span><\/td>\n<\/tr>\n
    \u5582\u72d7\u65b9\u5f0f<\/span><\/td>\n\u5199 CR \u5bc4\u5b58\u5668<\/span><\/td>\nGPIO \u7ffb\u8f6c WDI \u5f15\u811a<\/span><\/td>\n<\/tr>\n
    \u590d\u4f4d\u8f93\u51fa<\/span><\/td>\n\u5185\u90e8\u590d\u4f4d\u7ebf<\/span><\/td>\n\u76f4\u63a5\u62c9 NRST \u5f15\u811a<\/span><\/td>\n<\/tr>\n
    \u72ec\u7acb\u6027<\/span><\/td>\n\u4f9d\u8d56\u4e3b\u65f6\u949f，\u4e3b\u65f6\u949f\u6302\u5b83\u4e5f\u6302<\/span><\/td>\n\u5b8c\u5168\u72ec\u7acb\u4e8e MCU<\/span><\/td>\n<\/tr>\n
    \u76d1\u63a7\u7c92\u5ea6<\/span><\/td>\n\u65f6\u5e8f\u7cbe\u76d1\u63a7（\u5582\u65e9\u4e86\u4e5f\u590d\u4f4d）<\/span><\/td>\n\u8d85\u65f6\u7c97\u76d1\u63a7（\u53ea\u770b\u6700\u540e）<\/span><\/td>\n<\/tr>\n
    \u5178\u578b\u7528\u9014<\/span><\/td>\n\u68c0\u6d4b\u7a0b\u5e8f\u65f6\u5e8f\u5f02\u5e38\u3001\u9632\u6b62\u8dd1\u98de\u540e\u8fc7\u65e9\u5582\u72d7<\/span><\/td>\n\u9632 MCU \u6574\u7247\u6b7b\u673a<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e00\u53e5\u8bdd\u603b\u7ed3：<\/span><\/p>\n

      \n
    • IWDG：\u9632\u201c\u7a0b\u5e8f\u5361\u6b7b\u201d，\u6700\u5e38\u7528，\u4f46\u7cbe\u5ea6\u5dee\u3001\u914d\u7f6e\u53ef\u88ab\u8dd1\u98de\u7684\u7a0b\u5e8f\u7834\u574f；<\/span><\/li>\n
    • WWDG：\u9632\u201c\u5582\u72d7\u8282\u594f\u5f02\u5e38\u201d，\u80fd\u68c0\u6d4b\u201c\u7a0b\u5e8f\u8fd8\u6d3b\u7740\u4f46\u8282\u594f\u4e71\u4e86\u201d\u7684\u8f6f\u6545\u969c；<\/span><\/li>\n
    • \u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7：\u7269\u7406\u9694\u79bb\u3001\u4e0d\u53ef\u88ab\u8f6f\u4ef6\u6b3a\u9a97，\u662f\u7cfb\u7edf\u7ea7\u515c\u5e95\u3002<\/span><\/li>\n<\/ul>\n

      \u4e09\u3001\u6848\u4f8b\u9a8c\u8bc1<\/span><\/h3>\n

      \u6848\u4f8b 1：IWDG \u57fa\u7840\u9a8c\u8bc1 \u2014\u2014 \u4e3b\u5faa\u73af\u5361\u6b7b\u80fd\u5426\u590d\u4f4d<\/span><\/h4>\n

      \u76ee\u7684：\u9a8c\u8bc1 IWDG \u6700\u57fa\u672c\u7684\u529f\u80fd\u95ed\u73af\u3002<\/span><\/p>\n

      \u914d\u7f6e\u8981\u70b9（HAL \u5e93）：<\/span><\/p>\n

      IWDG_HandleTypeDef hiwdg;<\/p>\n

      void MX_IWDG_Init(void)
      \n{
      \n hiwdg.Instance = IWDG;
      \n \/* LSI \u2248 32kHz：\u9884\u5206\u9891 32 \u2192 1kHz \u8ba1\u6570，\u91cd\u88c5\u503c 1000 \u2192 \u7ea6 1s \u8d85\u65f6 *\/
      \n hiwdg.Init.Prescaler = IWDG_PRESCALER_32;
      \n hiwdg.Init.Reload = 1000;
      \n HAL_IWDG_Init(&hiwdg);
      \n}<\/p>\n

      int main(void)
      \n{
      \n \/* \u7565\u53bb\u65f6\u949f\/\u5916\u8bbe\u521d\u59cb\u5316 *\/
      \n MX_IWDG_Init();
      \n while (1)
      \n {
      \n do_work();
      \n HAL_IWDG_Refresh(&hiwdg); \/* \u6b63\u5e38\u5582\u72d7 *\/
      \n HAL_Delay(100);
      \n }
      \n}<\/p>\n

      \u590d\u73b0\u6b65\u9aa4：\u5728\u00a0do_work()\u00a0\u91cc\u6ce8\u5165\u00a0while(1);\u00a0\u6a21\u62df\u6b7b\u5faa\u73af，\u70e7\u5f55\u8fd0\u884c\u3002<\/span><\/p>\n

      \u9884\u671f\u73b0\u8c61：<\/span><\/p>\n

        \n
      • \u7ea6 1 \u79d2\u540e\u82af\u7247\u590d\u4f4d，\u4e32\u53e3\u91cd\u65b0\u6253\u5370\u542f\u52a8\u65e5\u5fd7 \u2192 IWDG \u751f\u6548；<\/span><\/li>\n
      • \u6293\u590d\u4f4d\u539f\u56e0\u5bc4\u5b58\u5668（RCC->CSR \u7684 IWDGRSTF \u4f4d）\u786e\u8ba4\u662f IWDG \u590d\u4f4d，\u800c\u975e\u4e0a\u7535\u590d\u4f4d：<\/span><\/li>\n<\/ul>\n

        if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST))
        \n{
        \n printf("[RESET] IWDG reset!\\\\r\\\\n");
        \n __HAL_RCC_CLEAR_RESET_FLAGS();
        \n}<\/p>\n

        \u7ed3\u8bba：<\/span><\/p>\n

        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IWDG \u80fd\u9632\u201c\u6700\u7b80\u5355\u7684\u4e3b\u5faa\u73af\u5361\u6b7b\u201d\u3002<\/span><\/p>\n

        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u662f\u5e95\u7ebf\u80fd\u529b，\u4e5f\u662f\u6240\u6709\u540e\u7eed\u9a8c\u8bc1\u7684\u5bf9\u7167\u7ec4\u3002<\/span><\/p>\n

        \u6ce8\u610f\u4e8b\u9879：<\/span><\/p>\n

        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LSI \u662f\u4f4e\u901f RC \u632f\u8361\u5668，\u8bef\u5dee\u53ef\u8fbe \u00b110%~\u00b130%，\u8d85\u65f6\u6309\u6700\u574f\u60c5\u51b5\u7559\u4f59\u91cf，\u6807\u79f0 1s \u53ef\u80fd\u5b9e\u9645\u662f 0.7~1.3s\u3002<\/span><\/p>\n

        \n

        \u6848\u4f8b 2：\u5582\u72d7\u4f4d\u7f6e\u9519\u8bef \u2014\u2014 \u4e2d\u65ad\u91cc\u5582\u72d7\u5bfc\u81f4\u7684\u201c\u5047\u6d3b\u201d<\/span><\/h4>\n

        \"\"<\/p>\n

        \u76ee\u7684：\u9a8c\u8bc1\u4e00\u4e2a\u7ecf\u5178\u53cd\u6a21\u5f0f\u2014\u2014\u628a\u5582\u72d7\u653e\u8fdb\u5b9a\u65f6\u5668\u4e2d\u65ad\u3002\u4e3b\u5faa\u73af\u5df2\u7ecf\u6b7b\u4e86，\u4f46\u4e2d\u65ad\u8fd8\u5728\u8dd1，\u770b\u95e8\u72d7\u6c38\u8fdc\u4e0d\u54ac\u4eba\u3002<\/span><\/p>\n

        \u590d\u73b0\u6b65\u9aa4：<\/span><\/p>\n

        \/* \u9519\u8bef\u793a\u8303 *\/
        \nvoid HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
        \n{
        \n HAL_IWDG_Refresh(&hiwdg); \/* \u4e3b\u5faa\u73af\u6b7b\u4e86\u8fd9\u91cc\u7167\u6837\u5582 *\/
        \n}<\/p>\n

        int main(void)
        \n{
        \n while (1)
        \n {
        \n do_work();
        \n while (1); \/* \u6ce8\u5165：\u4e3b\u5faa\u73af\u6b7b\u9501，\u4f46\u4e2d\u65ad\u4ecd\u5b58\u6d3b *\/
        \n }
        \n}<\/p>\n

        \u9884\u671f\u73b0\u8c61：<\/span><\/p>\n

          \n
        • \u8bbe\u5907\u4e0d\u518d\u590d\u4f4d，\u4e32\u53e3\u65e0\u8f93\u51fa，\u4f46\u793a\u6ce2\u5668\u6d4b\u5b9a\u65f6\u5668\u4e2d\u65ad\u5f15\u811a\u4ecd\u5728\u5468\u671f\u6027\u7ffb\u8f6c；<\/span><\/li>\n
        • \u73b0\u8c61\u4e0a\u5c31\u662f\u201c\u8bbe\u5907\u6b7b\u4e86\u4f46\u770b\u95e8\u72d7\u6ca1\u6551\u5b83\u201d\u2014\u2014\u8fd9\u6b63\u662f\u5f88\u591a\u73b0\u573a\u4e8b\u6545\u7684\u771f\u5b9e\u539f\u56e0\u3002<\/span><\/li>\n<\/ul>\n

          \u6b63\u786e\u505a\u6cd5：<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5582\u72d7\u52a8\u4f5c\u53ea\u653e\u5728\u4e3b\u5faa\u73af\u672b\u5c3e\u6216\u6700\u4f4e\u4f18\u5148\u7ea7\u7684\u4efb\u52a1\u91cc；<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u591a\u4efb\u52a1\u7cfb\u7edf\u7528\u201c\u4efb\u52a1\u5065\u5eb7\u5ea6\u6c47\u805a\u201d\u6a21\u5f0f\u2014\u2014\u6bcf\u4e2a\u5173\u952e\u4efb\u52a1\u5404\u81ea\u7f6e\u4f4d\u81ea\u5df1\u7684\u6807\u5fd7\u4f4d，\u4e3b\u5faa\u73af\u68c0\u67e5\u6240\u6709\u6807\u5fd7\u4f4d\u9f50\u5168\u540e\u624d\u5582\u72d7：<\/span><\/p>\n

          volatile uint32_t task_alive_mask = 0;<\/p>\n

          #define TASK_COMM_ALIVE (1u << 0)
          \n#define TASK_SAMPLE_ALIVE (1u << 1)<\/p>\n

          void comm_task(void) { task_alive_mask |= TASK_COMM_ALIVE; }
          \nvoid sample_task(void) { task_alive_mask |= TASK_SAMPLE_ALIVE; }<\/p>\n

          \/* \u4e3b\u5faa\u73af：\u5168\u90e8\u4efb\u52a1\u90fd\u62a5\u6d3b\u624d\u5582\u72d7 *\/
          \nif (task_alive_mask == (TASK_COMM_ALIVE | TASK_SAMPLE_ALIVE))
          \n{
          \n HAL_IWDG_Refresh(&hiwdg);
          \n task_alive_mask = 0;
          \n}
          \n\/* \u4efb\u4f55\u4e00\u4e2a\u4efb\u52a1\u5361\u6b7b \u2192 mask \u4e0d\u9f50 \u2192 \u505c\u6b62\u5582\u72d7 \u2192 IWDG \u590d\u4f4d *\/<\/p>\n

          \u7ed3\u8bba：\u770b\u95e8\u72d7\u9632\u7684\u662f\u201c\u7a0b\u5e8f\u5931\u53bb\u54cd\u5e94\u201d，\u5582\u72d7\u4f4d\u7f6e\u672c\u8eab\u5c31\u662f\u67b6\u6784\u95ee\u9898\u3002\u5582\u72d7\u4ee3\u7801\u8d8a\u9760\u8fd1\u201c\u771f\u6b63\u5728\u5e72\u6d3b\u7684\u4ee3\u7801\u201d，\u770b\u95e8\u72d7\u8d8a\u53ef\u4fe1\u3002<\/span><\/p>\n

          \n

          \u6848\u4f8b 3：WWDG \u7a97\u53e3\u9a8c\u8bc1 \u2014\u2014 \u5582\u5f97\u592a\u5feb\u4e5f\u8981\u590d\u4f4d<\/span><\/h4>\n

          \"\"<\/p>\n

          \u76ee\u7684：\u9a8c\u8bc1 WWDG \u7684\u201c\u7a97\u53e3\u201d\u7279\u6027，\u8bf4\u660e\u5b83\u548c IWDG \u7684\u4e92\u8865\u6027\u3002<\/span><\/p>\n

          \u914d\u7f6e\u8981\u70b9：<\/span><\/p>\n

          WWDG_HandleTypeDef hwwdg;
          \n\/* PCLK1 = 36MHz，\u9884\u5206\u9891 8 \u2192 \u8ba1\u6570\u5468\u671f\u7ea6 4.44us（F103 \u53c2\u8003） *\/
          \nhwwdg.Init.Prescaler = WWDG_PRESCALER_8;
          \nhwwdg.Init.Window = 0x50; \/* \u7a97\u53e3\u503c *\/
          \nhwwdg.Init.Counter = 0x7F; \/* \u4ece 0x7F \u9012\u51cf，\u5230 0x40 \u89e6\u53d1\u590d\u4f4d *\/
          \nhwwdg.Init.EWIMode = ENABLE; \/* \u63d0\u524d\u5524\u9192\u4e2d\u65ad（\u53ef\u9009） *\/
          \nHAL_WWDG_Init(&hwwdg);<\/p>\n

          \u590d\u73b0\u6b65\u9aa4（\u4e09\u4e2a\u5b50\u5b9e\u9a8c）：<\/span><\/p>\n<\/p>\n\n\u5b50\u5b9e\u9a8c<\/span>\u5582\u72d7\u95f4\u9694<\/span>\u9884\u671f\u7ed3\u679c<\/span><\/tr>\n\n\n\n\n
          3a<\/span><\/td>\n\u8fdc\u5c0f\u4e8e\u7a97\u53e3\u65f6\u95f4（\u5982 100us \u5c31\u5582）<\/span><\/td>\n\u590d\u4f4d\u2014\u2014\u5582\u5f97\u592a\u65e9<\/span><\/td>\n<\/tr>\n
          3b<\/span><\/td>\n\u9012\u51cf\u5230\u7a97\u53e3\u533a\u95f4\u5185\u5582（\u8ba1\u6570 < 0x50 \u4e14 > 0x40）<\/span><\/td>\n\u6b63\u5e38<\/span><\/td>\n<\/tr>\n
          3c<\/span><\/td>\n\u4e00\u76f4\u4e0d\u5582，\u9012\u51cf\u5230 0x3F<\/span><\/td>\n\u590d\u4f4d\u2014\u2014\u5582\u5f97\u592a\u665a<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u73b0\u8c61\u89e3\u8bfb：<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0WWDG \u5f3a\u5236\u8981\u6c42\u7a0b\u5e8f\u201c\u6309\u8282\u594f\u201d\u5582\u72d7\u3002<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u67d0\u4e2a\u51fd\u6570\u6267\u884c\u65f6\u95f4\u7a81\u7136\u53d8\u957f（\u4f8b\u5982 Flash \u64cd\u4f5c\u88ab\u4e2d\u65ad\u3001\u4efb\u52a1\u8c03\u5ea6\u6296\u52a8），\u5582\u72d7\u70b9\u4f1a\u6f02\u79fb\u51fa\u7a97\u53e3，\u4ece\u800c\u88ab\u53d1\u73b0\u3002<\/span><\/p>\n

          \u8fd9\u80fd\u6293\u4f4f IWDG \u6293\u4e0d\u4f4f\u7684\u4e00\u7c7b\u6545\u969c：<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7a0b\u5e8f\u8fd8\u6d3b\u7740，\u4f46\u6267\u884c\u65f6\u5e8f\u5df2\u7ecf\u5f02\u5e38\u3002<\/span><\/p>\n

          \u5b9e\u8df5\u5efa\u8bae：<\/span><\/p>\n

          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0WWDG \u5e38\u914d\u5408\u63d0\u524d\u5524\u9192\u4e2d\u65ad（EWI）\u4f7f\u7528\u2014\u2014\u5728\u4e2d\u65ad\u91cc\u4fdd\u5b58\u73b0\u573a\u4fe1\u606f（\u5173\u952e\u53d8\u91cf\u3001\u4efb\u52a1\u6808\u6c34\u4f4d）\u5230 Backup SRAM \u6216 Flash，\u518d\u590d\u4f4d，\u65b9\u4fbf\u4e8b\u540e\u5b9a\u4f4d\u3002<\/span><\/p>\n

          \n

          \u6848\u4f8b 4：IWDG \u7684\u5931\u6548\u573a\u666f \u2014\u2014 \u4e3a\u4ec0\u4e48\u5185\u90e8\u770b\u95e8\u72d7\u4e0d\u591f<\/span><\/h4>\n

          \u76ee\u7684：\u7528\u5b9e\u9a8c\u8bc1\u660e IWDG \u5728\u51e0\u79cd\u771f\u5b9e\u5de5\u51b5\u4e0b\u4f1a\u5931\u6548，\u8fd9\u5c31\u662f\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u5b58\u5728\u7684\u7406\u7531\u3002<\/span><\/p>\n

          \u5b50\u5b9e\u9a8c 4a：\u8c03\u8bd5\u5668 Halt \u5bfc\u81f4\u770b\u95e8\u72d7\u201c\u51bb\u7ed3\u201d<\/span><\/p>\n

            \n
          • \u590d\u73b0：\u5f00\u542f IWDG，\u5728 Keil\/IAR \u4e2d\u70b9\u6682\u505c\u3002<\/span><\/li>\n
          • \u73b0\u8c61：CPU Halt \u540e IWDG \u505c\u6b62\u8ba1\u6570（DBGMCU \u914d\u7f6e\u4e86\u51bb\u7ed3\u4f4d\u65f6）\u3002\u4ea7\u54c1\u51fa\u5382\u540e\u867d\u7136\u4e0d\u5e26\u8c03\u8bd5\u5668，\u4f46\u4efb\u4f55\u80fd\u6302\u4e0a SWD \u7684\u5f02\u5e38\u73af\u5883\u90fd\u53ef\u80fd\u8ba9\u770b\u95e8\u72d7\u5f62\u540c\u865a\u8bbe；\u66f4\u5e38\u89c1\u7684\u7c7b\u6bd4\u662f\u4f4e\u529f\u8017 Stop \u6a21\u5f0f\u4e0b IWDG \u884c\u4e3a\u4e0e\u9884\u671f\u4e0d\u7b26\u7684\u8bbe\u8ba1\u7f3a\u9677\u3002<\/span><\/li>\n<\/ul>\n

            \u5b50\u5b9e\u9a8c 4b：\u7a0b\u5e8f\u8dd1\u98de\u540e\u6539\u5199 IWDG \u5bc4\u5b58\u5668<\/span><\/p>\n

              \n
            • \u590d\u73b0：\u901a\u8fc7\u6545\u610f\u8d8a\u754c\u7684\u51fd\u6570\u6307\u9488\u8df3\u8f6c\u5230\u4e00\u6bb5\u201c\u91ce\u4ee3\u7801\u201d，\u6216\u76f4\u63a5\u5728\u8c03\u8bd5\u5668\u91cc\u628a IWDG->PR \/ IWDG->RLR \u6539\u5230\u6700\u957f\u8d85\u65f6\u3002<\/span><\/li>\n
            • \u73b0\u8c61：IWDG \u8d85\u65f6\u88ab\u65e0\u9650\u5ef6\u957f，\u590d\u4f4d\u4e0d\u518d\u53d1\u751f\u3002<\/span><\/li>\n
            • \u672c\u8d28：IWDG \u4e0e\u88ab\u76d1\u63a7\u7684\u7a0b\u5e8f\u5728\u540c\u4e00\u9897\u82af\u7247\u4e0a，\u914d\u7f6e\u5bc4\u5b58\u5668\u5bf9\u8f6f\u4ef6\u662f\u53ef\u5199\u7684\u2014\u2014\u8dd1\u98de\u7684\u7a0b\u5e8f\u7406\u8bba\u4e0a\u53ef\u4ee5\u201c\u5173\u6389\u81ea\u5df1\u7684\u770b\u5b88\u201d\u3002<\/span><\/li>\n<\/ul>\n

              \u5b50\u5b9e\u9a8c 4c：\u4e3b\u65f6\u949f\u5f02\u5e38<\/span><\/p>\n

                \n
              • \u590d\u73b0：\u8fd0\u884c\u4e2d\u5e72\u6270\u6676\u632f（\u5de5\u7a0b\u4e0a\u53ef\u7528\u62d4\u6676\u632f\/\u964d\u6fc0\u52b1\u6a21\u62df）\u3002<\/span><\/li>\n
              • \u73b0\u8c61：\u82e5\u65f6\u949f\u6811\u8fdb\u5165\u5f02\u5e38\u72b6\u6001，\u590d\u4f4d\u53ef\u80fd\u5ef6\u8fdf\u751a\u81f3\u5931\u6548；\u590d\u4f4d\u540e\u82e5\u65f6\u949f\u4ecd\u5f02\u5e38，\u9700\u8981 CSS（\u65f6\u949f\u5b89\u5168\u7cfb\u7edf）\u4e0e\u770b\u95e8\u72d7\u914d\u5408\u8bbe\u8ba1\u3002<\/span><\/li>\n<\/ul>\n

                \u7ed3\u8bba：<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5185\u90e8\u770b\u95e8\u72d7\u7684\u4e09\u4e2a\u8f6f\u808b\u2014\u2014\u53ef\u88ab\u8f6f\u4ef6\u6b3a\u9a97\u3001\u53ef\u88ab\u8c03\u8bd5\/\u4f4e\u529f\u8017\u72b6\u6001\u5f71\u54cd\u3001\u4f9d\u8d56\u7247\u4e0a\u65f6\u949f\u3002\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8981\u7a81\u7834\u8fd9\u4e09\u70b9，\u53ea\u80fd\u9760\u82af\u7247\u5916\u7684\u786c\u4ef6\u3002<\/span><\/p>\n

                \n

                \u6848\u4f8b 5：\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u9a8c\u8bc1 \u2014\u2014 TPS3823 \u515c\u5e95<\/span><\/h4>\n

                \"\"<\/p>\n

                \u76ee\u7684：\u9a8c\u8bc1\u5916\u90e8\u770b\u95e8\u72d7\u82af\u7247\u5728\u201cMCU \u5185\u90e8\u770b\u95e8\u72d7\u5168\u90e8\u5931\u6548\u201d\u7684\u573a\u666f\u4e0b\u4ecd\u80fd\u590d\u4f4d\u7cfb\u7edf\u3002<\/span><\/p>\n

                \u786c\u4ef6\u8fde\u63a5：<\/span><\/p>\n

                STM32 GPIO（\u5982 PA8） \u2500\u2500\u2192 TPS3823 WDI（\u5582\u72d7\u8f93\u5165，\u9700\u5468\u671f\u6027\u7535\u5e73\u7ffb\u8f6c）
                \nTPS3823 \/RESET（\u5f00\u6f0f） \u2500\u2500\u2192 STM32 NRST（\u5efa\u8bae\u63a5 10k \u4e0a\u62c9）
                \nTPS3823 \u540c\u65f6\u76d1\u63a7 VDD 3.3V（\u7535\u538b\u4f4e\u4e8e\u9608\u503c\u81ea\u52a8\u590d\u4f4d）<\/p>\n

                \u5582\u72d7\u4ee3\u7801（\u7ffb\u8f6c\u7535\u5e73\u800c\u975e\u5199\u5bc4\u5b58\u5668）：<\/span><\/p>\n

                #define EXT_WDG_TOGGLE() HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_8)<\/p>\n

                \/* \u4e3b\u5faa\u73af\u4e2d，\u5468\u671f < TPS3823 \u8d85\u65f6（\u5178\u578b 1.6s），\u4e14 > \u6700\u77ed\u8109\u5bbd\u8981\u6c42 *\/
                \nwhile (1)
                \n{
                \n do_work();
                \n EXT_WDG_TOGGLE();
                \n HAL_Delay(200);
                \n}<\/p>\n

                \u590d\u73b0\u6b65\u9aa4\u4e0e\u9884\u671f\u73b0\u8c61：<\/span><\/p>\n\n\u6ce8\u5165\u7684\u6545\u969c<\/span>IWDG \u7ed3\u679c<\/span>TPS3823 \u7ed3\u679c<\/span><\/tr>\n\n\n\n\n\n\n\n
                \u4e3b\u5faa\u73af while(1)（\u4e0d\u5582\u4efb\u4f55\u72d7）<\/span><\/td>\n\u590d\u4f4d \u2713<\/span><\/td>\n\u7ea6 1.6s \u540e\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n
                \u8dd1\u98de\u540e\u6539\u5199 IWDG \u914d\u7f6e<\/span><\/td>\n\u4e0d\u590d\u4f4d \u2717<\/span><\/td>\n\u7167\u5e38\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n
                IWDG \u5582\u72d7\u653e\u4e2d\u65ad\u91cc（\u5047\u6d3b）<\/span><\/td>\n\u4e0d\u590d\u4f4d \u2717<\/span><\/td>\n\u7167\u5e38\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n
                \u76f4\u63a5\u65ad\u4f9b\u5582\u72d7 GPIO \u521d\u59cb\u5316<\/span><\/td>\n\u770b\u914d\u7f6e<\/span><\/td>\n\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n
                \u62d4\u6389\u5582\u72d7\u7ebf（\u6a21\u62df GPIO \u635f\u574f）<\/span><\/td>\n\u2014<\/span><\/td>\n\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n
                VDD \u8dcc\u843d\u5230 2.9V<\/span><\/td>\n\u2014<\/span><\/td>\n\u7535\u538b\u76d1\u63a7\u5f3a\u5236\u590d\u4f4d \u2713<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                \u5173\u952e\u6d4b\u91cf\u70b9（\u793a\u6ce2\u5668\u53cc\u901a\u9053）：<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u901a\u9053 1 \u63a5 PA8 \u786e\u8ba4\u5582\u72d7\u6ce2\u5f62\u505c\u6b62\u7684\u65f6\u95f4\u70b9；<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u901a\u9053 2 \u63a5 NRST，\u6d4b\u91cf\u201c\u6700\u540e\u4e00\u6b21\u5582\u72d7\u201d\u5230\u201c\u590d\u4f4d\u62c9\u4f4e\u201d\u7684\u5b9e\u9645\u95f4\u9694，\u4e0e\u6570\u636e\u624b\u518c\u6807\u79f0\u503c\u5bf9\u6bd4（TPS3823 \u5178\u578b 1.6s，\u5b9e\u9645\u7ea6 1.4~2.2s \u5206\u5e03）\u3002<\/span><\/p>\n

                \u7ed3\u8bba：<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5916\u90e8\u770b\u95e8\u72d7\u4e0e MCU \u662f\u7269\u7406\u9694\u79bb\u7684\u2014\u2014\u5b83\u4e0d\u4f9d\u8d56\u4efb\u4f55 MCU \u5185\u90e8\u8d44\u6e90，\u53ea\u8ba4 WDI \u5f15\u811a\u6709\u6ca1\u6709\u6309\u65f6\u7ffb\u8f6c\u3002<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8f6f\u4ef6\u518d\u600e\u4e48\u8dd1\u98de，\u90fd\u9a97\u4e0d\u4e86\u5b83\u3002<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9644\u5e26\u6536\u76ca\u662f\u7535\u6e90\u76d1\u63a7（Brown-out \u68c0\u6d4b），\u89e3\u51b3\u4e86\u201c\u7535\u538b\u5f02\u5e38\u5bfc\u81f4 MCU \u903b\u8f91\u6df7\u4e71\u201d\u8fd9\u4e00\u770b\u95e8\u72d7\u7ba1\u4e0d\u5230\u7684\u95ee\u9898\u3002<\/span><\/p>\n

                \n

                \u6848\u4f8b 6：\u53cc\u91cd\u770b\u95e8\u72d7\u67b6\u6784 \u2014\u2014 \u5b9e\u9645\u4ea7\u54c1\u7684\u63a8\u8350\u505a\u6cd5<\/span><\/h4>\n

                \"\"<\/p>\n

                \u76ee\u7684：\u9a8c\u8bc1\u201c\u5185\u90e8 WWDG（\u5feb\u5468\u671f\u3001\u7cbe\u7ec6\u76d1\u63a7）+ \u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7（\u6162\u5468\u671f\u3001\u7cfb\u7edf\u515c\u5e95）\u201d\u7684\u5206\u5c42\u67b6\u6784\u3002<\/span><\/p>\n

                \u67b6\u6784\u8bbe\u8ba1：<\/span><\/p>\n

                \u4efb\u52a1\u5c42：\u5404\u4efb\u52a1\u62a5\u6d3b \u2192 \u6c47\u805a\u68c0\u67e5
                \n \u2193 \u5168\u90e8\u62a5\u6d3b
                \nWWDG \u5582\u72d7（\u7a97\u53e3\u5185，\u68c0\u6d4b\u65f6\u5e8f\u6296\u52a8）
                \n \u2193 \u4e3b\u5faa\u73af\u6b63\u5e38
                \nIWDG \u5582\u72d7（\u9632 WWDG \u914d\u7f6e\u88ab\u7834\u574f\u540e\u7684\u515c\u5e95）
                \n \u2193 \u4e3b\u5faa\u73af\u6b63\u5e38
                \nGPIO \u7ffb\u8f6c \u2192 \u5916\u90e8 TPS3823（\u6700\u7ec8\u515c\u5e95）<\/p>\n

                \u5206\u5c42\u903b\u8f91：<\/span><\/p>\n

              • WWDG（\u7ea6\u51e0\u5341 ms \u7a97\u53e3）\u200b：\u76d1\u63a7\u4e3b\u5faa\u73af\u8282\u594f，\u53d1\u73b0\u201c\u6d3b\u7740\u4f46\u4e71\u4e86\u201d\u7684\u8f6f\u6545\u969c；<\/span><\/li>\n
              • IWDG（\u51e0\u767e ms）\u200b：WWDG \u5931\u6548\u65f6\u7684\u7b2c\u4e8c\u9053\u5185\u90e8\u9632\u7ebf；<\/span><\/li>\n
              • \u5916\u90e8\u770b\u95e8\u72d7（\u7ea6 1.6s）\u200b：\u4e0d\u4fe1\u4efb MCU \u5185\u90e8\u4efb\u4f55\u4e1c\u897f\u7684\u6700\u540e\u9632\u7ebf\u3002<\/span><\/li>\n

                \u9a8c\u8bc1\u65b9\u6cd5：<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bf9\u6bcf\u4e00\u5c42\u5206\u522b\u6ce8\u5165\u6545\u969c（\u590d\u7528\u6848\u4f8b 2\/4 \u7684\u624b\u6bb5），\u786e\u8ba4\u201c\u4e0b\u5c42\u5931\u6548\u65f6\u4e0a\u5c42\u80fd\u63a5\u4f4f\u201d\u3002<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f8b\u5982\u540c\u65f6\u9a97\u8fc7 WWDG \u548c IWDG（\u6848\u4f8b 4b \u624b\u6bb5），\u5916\u90e8\u770b\u95e8\u72d7\u4ecd\u7136\u5728\u7ea6 1.6s \u5185\u5b8c\u6210\u590d\u4f4d\u3002<\/span><\/p>\n

                \u590d\u4f4d\u540e\u7684\u81ea\u68c0\u5efa\u8bae：<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ece RCC->CSR \/ Backup \u5bc4\u5b58\u5668\u8bfb\u53d6\u590d\u4f4d\u539f\u56e0\u5e76\u4e0a\u62a5\u4e91\u7aef（\u82e5\u5e26\u901a\u4fe1\u80fd\u529b）；<\/span><\/p>\n

                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7edf\u8ba1\u770b\u95e8\u72d7\u590d\u4f4d\u9891\u7387\u2014\u2014\u9891\u7e41\u89e6\u53d1\u672c\u8eab\u5c31\u662f\u4ea7\u54c1\u7f3a\u9677\u7684\u4fe1\u53f7，\u4e0d\u8981\u8ba9\u590d\u4f4d\u63a9\u76d6 bug\u3002<\/span><\/p>\n

                \n

                \u56db\u3001\u5bf9\u6bd4\u603b\u7ed3\u4e0e\u5b9e\u8df5 Checklist<\/span><\/h3>\n

                \u9009\u578b\u51b3\u7b56：<\/span><\/p>\n

                \u5c0f\u5bb6\u7535\/\u73a9\u5177\u7c7b，\u6b7b\u673a\u65e0\u6240\u8c13？ \u2192 IWDG \u5c31\u591f\u4e86
                \n\u4e00\u822c\u5de5\u4e1a\/\u6d88\u8d39\u4ea7\u54c1？ \u2192 IWDG + \u6b63\u786e\u7684\u5582\u72d7\u67b6\u6784（\u6848\u4f8b 2）
                \n\u957f\u5468\u671f\u65e0\u4eba\u503c\u5b88（\u8868\u8ba1\u3001\u4e95\u76d6\u7ec8\u7aef）？ \u2192 IWDG + \u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7（\u6848\u4f8b 5）
                \n\u9ad8\u53ef\u9760\/\u5b89\u5168\u76f8\u5173（\u533b\u7597\u3001\u5de5\u63a7）？ \u2192 WWDG + IWDG + \u5916\u90e8\u770b\u95e8\u72d7 \u4e09\u5c42（\u6848\u4f8b 6）<\/p>\n

                \u4e0a\u7ebf\u524d Checklist：<\/span><\/p>\n

                  \n
                • \u00a0\u5582\u72d7\u4ee3\u7801\u4e0d\u5728\u4efb\u4f55\u4e2d\u65ad\u91cc（\u6848\u4f8b 2）<\/span><\/li>\n
                • \u00a0\u591a\u4efb\u52a1\u7cfb\u7edf\u4f7f\u7528\u62a5\u6d3b\u6c47\u805a，\u800c\u4e0d\u662f\u5355\u4e00\u4f4d\u7f6e\u5582\u72d7<\/span><\/li>\n
                • \u00a0IWDG \u8d85\u65f6\u6309 LSI \u6700\u574f\u8bef\u5dee\u7559\u4f59\u91cf（\u00b130%）<\/span><\/li>\n
                • \u00a0\u590d\u4f4d\u539f\u56e0\u5bc4\u5b58\u5668\u88ab\u8bfb\u53d6\u5e76\u4e0a\u62a5\/\u8bb0\u5f55<\/span><\/li>\n
                • \u00a0\u9a8c\u8bc1\u8fc7\u4f4e\u529f\u8017\u6a21\u5f0f\u8fdb\/\u51fa\u540e\u770b\u95e8\u72d7\u884c\u4e3a\u7b26\u5408\u9884\u671f<\/span><\/li>\n
                • \u00a0\u8c03\u8bd5\u5668\u6302\u8f7d\u5de5\u51b5\u4e0b\u7684\u770b\u95e8\u72d7\u884c\u4e3a\u5df2\u786e\u8ba4\u5e76\u9501\u5b9a\u53d1\u5e03\u914d\u7f6e<\/span><\/li>\n
                • \u00a0\u5916\u90e8\u770b\u95e8\u72d7：\u5582\u72d7\u4fe1\u53f7\u5468\u671f\u5b9e\u6d4b\u5728\u7a97\u53e3\u5185，NRST \u8fde\u63a5\u4e0e\u4e0a\u62c9\u6b63\u786e<\/span><\/li>\n
                • \u00a0\u91cf\u4ea7\u56fa\u4ef6\u5173\u95ed\u8c03\u8bd5\u53e3（RDP）\u6216\u81f3\u5c11\u786e\u8ba4\u770b\u95e8\u72d7\u4e0d\u53ef\u901a\u8fc7 SWD \u51bb\u7ed3<\/span><\/li>\n
                • \u00a0\u770b\u95e8\u72d7\u590d\u4f4d\u8ba1\u6570\u6709\u9065\u6d4b，\u5f02\u5e38\u589e\u591a\u4f1a\u89e6\u53d1\u544a\u8b66<\/span><\/li>\n<\/ul>\n

                  \u4e94\u3001\u53c2\u8003\u8d44\u6599<\/span><\/h3>\n
                    \n
                  • ST：RM0008（STM32F10x \u53c2\u8003\u624b\u518c）Independent watchdog \/ Window watchdog \u7ae0\u8282<\/span><\/li>\n
                  • ST：AN4228\u300aGetting started with STM32 IWDG\u300b\/ AN3522<\/span><\/li>\n
                  • TI：TPS3823 \u6570\u636e\u624b\u518c（Supervisory circuits with watchdog timer）<\/span><\/li>\n
                  • Maxim\/ADI：MAX6369 \u7cfb\u5217\u6570\u636e\u624b\u518c（\u53ef\u8c03\u8d85\u65f6\u7684\u5916\u90e8\u770b\u95e8\u72d7）<\/span><\/li>\n<\/ul>\n
                    \n

                    \u9762\u8bd5\u9898<\/span><\/h2>\n

                    \u4e00\u3001\u539f\u7406\u4e0e\u6982\u5ff5<\/span><\/h3>\n

                    Q1. \u770b\u95e8\u72d7\u7684\u6838\u5fc3\u4f5c\u7528\u662f\u4ec0\u4e48？\u5b83\u80fd\u9632\u6b62\u4ec0\u4e48？\u4e0d\u80fd\u9632\u6b62\u4ec0\u4e48？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f5c\u7528\u662f\u7a0b\u5e8f\u5931\u63a7\u540e\u81ea\u52a8\u590d\u4f4d MCU，\u5b9e\u73b0\u65e0\u4eba\u503c\u5b88\u81ea\u6062\u590d\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u80fd\u9632：\u8dd1\u98de\u3001\u6b7b\u5faa\u73af\u3001HardFault \u5361\u6b7b\u3001\u6808\u6ea2\u51fa\u5bfc\u81f4 PC \u8dd1\u98de\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e0d\u80fd\u9632：\u7535\u6e90\u5931\u6548\u3001\u65f6\u949f\u6e90\u672c\u8eab\u635f\u574f\u3001SRAM \u6570\u636e\u5168\u90e8\u7ffb\u8f6c\u3001\u5916\u90e8\u786c\u4ef6\u6545\u969c\u3002<\/span><\/p>\n

                    \n

                    Q2. \u4e3a\u4ec0\u4e48\u8bf4\u770b\u95e8\u72d7\u662f"\u6700\u540e\u4e00\u9053\u9632\u7ebf"？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6240\u6709\u8f6f\u4ef6\u6062\u590d\u673a\u5236（assert\u3001\u5f02\u5e38\u5904\u7406\u3001HardFault handler）\u90fd\u4f9d\u8d56 CPU \u80fd\u6b63\u786e\u53d6\u6307\u6267\u884c\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e00\u65e6\u8dd1\u98de，\u8fd9\u4e9b\u4ee3\u7801\u6839\u672c\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u770b\u95e8\u72d7\u72ec\u7acb\u4e8e\u4e3b\u7a0b\u5e8f，CPU \u5931\u63a7\u540e\u5b83\u8fd8\u5728\u8d70，\u6240\u4ee5\u662f\u6700\u540e\u4e00\u9053\u3002<\/span><\/p>\n

                    \n

                    Q3. IWDG \u7684"\u72ec\u7acb"\u4f53\u73b0\u5728\u54ea\u51e0\u4e2a\u65b9\u9762？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2460 \u65f6\u949f\u72ec\u7acb（LSI \u4e0d\u4f9d\u8d56 HSE\/HSI）；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2461 \u8ba1\u6570\u5668\u72ec\u7acb（\u786c\u4ef6\u81ea\u4e3b\u9012\u51cf，\u4e0d\u4f9d\u8d56 CPU \u6307\u4ee4）；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2462 \u590d\u4f4d\u72ec\u7acb（\u51cf\u5230 0 \u5f3a\u5236\u590d\u4f4d，\u8f6f\u4ef6\u65e0\u6cd5\u5c4f\u853d）\u3002<\/span><\/p>\n

                    \n

                    Q4. LSI \u548c HSI \u7684\u533a\u522b？\u4e3a\u4ec0\u4e48\u770b\u95e8\u72d7\u7528 LSI \u4e0d\u7528 HSI？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LSI \u662f\u4f4e\u901f\u5185\u90e8 RC（32kHz），HSI \u662f\u9ad8\u901f\u5185\u90e8 RC（16MHz）\u3002<\/span><\/p>\n

                    \u770b\u95e8\u72d7\u7528 LSI \u56e0\u4e3a：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2460 \u4f4e\u901f\u3001\u529f\u8017\u4f4e；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2461 \u5373\u4f7f\u4e3b\u7cfb\u7edf\u65f6\u949f\u914d\u7f6e\u51fa\u9519，LSI \u4ecd\u72ec\u7acb\u8fd0\u884c；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2462 \u4e0d\u9700\u8981\u7cbe\u786e\u65f6\u949f，\u7c97\u7c92\u5ea6\u8d85\u65f6\u8db3\u591f\u3002<\/span><\/p>\n

                    \n

                    Q5. IWDG \u8ba1\u6570\u5668\u662f\u591a\u5c11\u4f4d\u7684？\u6700\u5927\u503c\u591a\u5c11？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a012 \u4f4d\u9012\u51cf\u8ba1\u6570\u5668，\u8303\u56f4 0~4095（2^12-1）\u3002<\/span><\/p>\n

                    Q6. IWDG \u7684\u8d85\u65f6\u65f6\u95f4\u7531\u54ea\u51e0\u4e2a\u53c2\u6570\u51b3\u5b9a？<\/span><\/p>\n

                    A：\u4e09\u4e2a：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2460 LSI \u9891\u7387；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2461 \u9884\u5206\u9891\u7cfb\u6570 PR（4\/8\/16\/…\/256）；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2462 \u91cd\u88c5\u8f7d\u503c RLR（0~4095）\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u516c\u5f0f T = 4\u00d72^PR\u00d7RLR \/ f_LSI\u3002<\/span><\/p>\n

                    \n

                    Q7. IWDG \u6700\u5c0f\u8d85\u65f6\u548c\u6700\u5927\u8d85\u65f6\u5206\u522b\u662f\u591a\u5c11？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6700\u5c0f：PR=0\u3001RLR=1 \u2192 4\u00d71\u00d71\/32000 \u2248 125\u00b5s；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6700\u5927：PR=6\u3001RLR=4095 \u2192 4\u00d764\u00d74095\/32000 \u2248 32.8 \u79d2\u3002<\/span><\/p>\n

                    \n

                    \u4e8c\u3001\u5bc4\u5b58\u5668\u7ec6\u8282<\/span><\/h3>\n

                    Q8. IWDG_KR \u5bc4\u5b58\u5668\u4e3a\u4ec0\u4e48\u662f"\u53ea\u5199"\u7684？\u5199\u4e0d\u540c\u503c\u5206\u522b\u505a\u4ec0\u4e48？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0KR \u662f\u547d\u4ee4\u5bc4\u5b58\u5668，\u8bfb\u65e0\u610f\u4e49\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00xCCCC \u542f\u52a8\u72d7；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00xAAAA \u5582\u72d7（\u91cd\u8f7d\u8ba1\u6570\u5668）；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00x5555 \u89e3\u9501 PR\/RLR \u5199\u4fdd\u62a4\u3002<\/span><\/p>\n

                    \n

                    Q9. \u5199 PR \u6216 RLR \u4e4b\u524d\u4e3a\u4ec0\u4e48\u5fc5\u987b\u5148\u5199 0x5555？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PR \u548c RLR \u9ed8\u8ba4\u5199\u4fdd\u62a4，\u9632\u6b62\u7a0b\u5e8f\u8dd1\u98de\u540e\u968f\u673a\u4fee\u6539\u770b\u95e8\u72d7\u53c2\u6570\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5199 0x5555 \u89e3\u9501\u4e00\u6b21，\u5199\u5b8c\u81ea\u52a8\u91cd\u9501\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u662f\u4e24\u6b65\u9a8c\u8bc1\u673a\u5236\u3002<\/span><\/p>\n

                    \n

                    Q10. IWDG_SR \u7684 PVU \u548c RVU \u4f4d\u662f\u4ec0\u4e48\u610f\u601d？\u4e3a\u4ec0\u4e48\u8981\u7b49\u5b83\u4eec\u6e05\u96f6？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PVU=\u9884\u5206\u9891\u66f4\u65b0\u4e2d，RVU=\u91cd\u88c5\u8f7d\u66f4\u65b0\u4e2d\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5199 PR\/RLR \u540e，\u786c\u4ef6\u9700\u8981\u51e0\u4e2a LSI \u5468\u671f\u628a\u65b0\u503c\u540c\u6b65\u5230\u5f02\u6b65\u57df，\u8fd9\u671f\u95f4\u5bf9\u5e94\u4f4d=1\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e0d\u7b49\u6e05\u96f6\u5c31\u5199\u4f1a\u5bfc\u81f4\u914d\u7f6e\u4e22\u5931\u6216\u9519\u4e71\u3002<\/span><\/p>\n

                    \n

                    Q11. IWDG_DR \u5bc4\u5b58\u5668\u662f\u5e72\u4ec0\u4e48\u7684？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ea\u8bfb，\u8fd4\u56de\u5f53\u524d\u9012\u51cf\u8ba1\u6570\u5668\u7684\u503c\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u5b9e\u65f6\u89c2\u6d4b\u8fd8\u5269\u591a\u5c11\u8ba1\u6570，\u5224\u65ad\u5582\u72d7\u662f\u5426\u53ca\u65f6\u3002<\/span><\/p>\n

                    \n

                    Q12. RCC_CSR \u91cc\u6709\u54ea\u4e9b\u590d\u4f4d\u6807\u5fd7？IWDGRSTF \u4ec0\u4e48\u65f6\u5019\u7f6e\u4f4d？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IWDGRSTF（\u72ec\u7acb\u72d7）\u3001WWDGRSTF（\u7a97\u53e3\u72d7）\u3001SFTRSTF（\u8f6f\u4ef6\u590d\u4f4d）\u3001\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PORRSTF（\u4e0a\u7535）\u3001PINRSTF（NRST \u5f15\u811a）\u3001BORRSTF（\u4f4e\u538b\u68c0\u6d4b）\u3001\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LPWRRSTF（\u4f4e\u529f\u8017\u590d\u4f4d）\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IWDG \u8ba1\u6570\u5668\u51cf\u5230 0 \u4ea7\u751f\u590d\u4f4d\u65f6\u7f6e\u4f4d\u3002<\/span><\/p>\n

                    \n

                    Q13. \u600e\u4e48\u6e05\u9664\u590d\u4f4d\u6807\u5fd7\u4f4d？<\/span><\/p>\n

                    A：\u5199 RCC_CSR \u7684 RMVF \u4f4d（Remove Flag），\u4e00\u6b21\u6e05\u9664\u6240\u6709\u590d\u4f4d\u6807\u5fd7\u3002<\/span><\/p>\n

                    \n

                    \u4e09\u3001\u5199\u4fdd\u62a4\u4e0e\u5b89\u5168\u6027<\/span><\/h3>\n

                    Q14. \u5199\u4fdd\u62a4\u7684\u8bbe\u8ba1\u76ee\u7684\u662f\u4ec0\u4e48？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9632\u6b62\u7a0b\u5e8f\u8dd1\u98de\u540e PC \u968f\u673a\u5199\u5bc4\u5b58\u5668，\u610f\u5916\u628a RLR \u6539\u5927\u6216 PR \u6539\u5927，\u5bfc\u81f4\u770b\u95e8\u72d7\u8d85\u65f6\u88ab\u62c9\u957f\u751a\u81f3\u5931\u6548\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e24\u6b65\u89e3\u9501（0x5555 + \u5199\u914d\u7f6e）\u8ba9\u8bef\u64cd\u4f5c\u6982\u7387\u6781\u4f4e\u3002<\/span><\/p>\n

                    \n

                    Q15. \u4e3a\u4ec0\u4e48 KR \u7528 0xAAAA\u30010x5555 \u8fd9\u79cd\u9b54\u6cd5\u6570\u5b57，\u800c\u4e0d\u662f\u7f6e\u67d0\u4e2a bit？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u8bbe\u8ba1\u6210"\u5199 KR.bit0=1 \u5c31\u662f\u5582\u72d7"，\u8dd1\u98de\u540e\u968f\u673a\u5199\u5bc4\u5b58\u5668\u5f88\u5bb9\u6613\u6070\u597d\u547d\u4e2d\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528 16 \u4f4d\u7279\u5b9a\u503c，\u8dd1\u98de\u540e\u968f\u673a\u5199\u5bf9\u7684\u6982\u7387\u662f 1\/65536，\u5927\u5e45\u964d\u4f4e\u8bef\u5582\u72d7\u6982\u7387\u3002<\/span><\/p>\n

                    \n

                    Q16. IWDG \u542f\u52a8\u540e\u8f6f\u4ef6\u80fd\u5173\u95ed\u5417？\u4e3a\u4ec0\u4e48？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e0d\u80fd\u3002\u5199 KR=0xCCCC \u540e\u53ea\u80fd\u9760\u7cfb\u7edf\u590d\u4f4d\u505c\u6b62\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u662f\u6545\u610f\u8bbe\u8ba1\u2014\u2014\u9632\u6b62\u8dd1\u98de\u540e\u8f6f\u4ef6"\u81ea\u6551"\u628a\u72d7\u5173\u4e86，\u8ba9\u770b\u95e8\u72d7\u5931\u53bb\u610f\u4e49\u3002<\/span><\/p>\n

                    \n

                    Q17. option byte \u91cc\u914d\u7f6e\u7684"\u786c\u4ef6\u770b\u95e8\u72d7"\u662f\u4ec0\u4e48\u610f\u601d？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0option byte \u53ef\u4ee5\u914d\u7f6e IWDG \u4e3a\u786c\u4ef6\u542f\u52a8\u6a21\u5f0f\u2014\u2014\u4e0a\u7535\u540e\u770b\u95e8\u72d7\u81ea\u52a8\u542f\u52a8，\u4e0d\u9700\u8981\u8f6f\u4ef6\u5199 0xCCCC\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u6837\u5373\u4f7f main \u51fd\u6570\u8dd1\u98de，\u72d7\u4e5f\u5df2\u7ecf\u5728\u8dd1\u4e86，\u53ef\u9760\u6027\u66f4\u9ad8\u3002<\/span><\/p>\n

                    \u56db\u3001\u5de5\u7a0b\u5b9e\u6218<\/span><\/h3>\n

                    Q18. \u5582\u72d7\u5e94\u8be5\u653e\u5728\u54ea\u91cc？\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u653e\u4e2d\u65ad\u91cc？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u653e\u5728\u4e3b\u5faa\u73af\u672b\u5c3e，\u6240\u6709\u5173\u952e\u4efb\u52a1\u6b63\u5e38\u8dd1\u5b8c\u624d\u5582\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u653e\u4e2d\u65ad\u91cc\u7684\u8bdd，\u4e3b\u7a0b\u5e8f\u6b7b\u5faa\u73af\u4f46\u4e2d\u65ad\u8fd8\u6d3b\u7740，\u72d7\u6c38\u8fdc\u88ab\u5582，\u7b49\u4e8e\u767d\u88c5\u3002<\/span><\/p>\n

                    \n

                    Q19. \u5582\u72d7\u95f4\u9694\u548c\u8d85\u65f6\u65f6\u95f4\u600e\u4e48\u914d\u6bd4？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8d85\u65f6\u65f6\u95f4\u8bbe\u4e3a\u6700\u957f\u4efb\u52a1\u6267\u884c\u65f6\u95f4\u7684 23 \u500d；\u5582\u72d7\u95f4\u9694\u8bbe\u4e3a\u8d85\u65f6\u65f6\u95f4\u7684 1\/31\/2\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f8b\u5982\u8d85\u65f6 2 \u79d2，\u5582\u72d7 500ms \u4e00\u6b21，\u7559\u8db3\u4f59\u91cf\u3002<\/span><\/p>\n

                    \n

                    Q20. LSI \u6709 \u00b110% \u8bef\u5dee，\u914d\u7f6e\u65f6\u8981\u6ce8\u610f\u4ec0\u4e48？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LSI \u504f\u5feb \u2192 \u8ba1\u6570\u5668\u51cf\u5f97\u5feb \u2192 \u5b9e\u9645\u8d85\u65f6\u6bd4\u6807\u79f0\u77ed\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6309"\u6700\u5feb LSI"（f\u00d71.1）\u53cd\u63a8 RLR，\u4e0d\u8981\u6309\u6807\u79f0\u503c\u7559\u4f59\u91cf\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8981\u6c42\u7cbe\u786e\u65f6\u7528 TIM5 \u8f93\u5165\u6355\u83b7\u5b9e\u6d4b LSI \u9891\u7387\u3002<\/span><\/p>\n

                    \n

                    Q21. \u8c03\u8bd5\u65f6\u4e3a\u4ec0\u4e48\u4f1a\u88ab IWDG \u590d\u4f4d？\u600e\u4e48\u89e3\u51b3？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CPU halt \u65f6 IWDG \u8fd8\u5728\u8ba1\u6570，\u6ca1\u4eba\u5582\u72d7\u5c31\u590d\u4f4d\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u89e3\u51b3：\u914d\u7f6e DBGMCU_APB1FZ \u7684 DBG_IWDG_STOP \u4f4d，\u8c03\u8bd5\u65f6\u51bb\u7ed3 IWDG\u3002<\/span><\/p>\n

                    \n

                    Q22. \u4f4e\u529f\u8017\u6a21\u5f0f（\u505c\u6b62\/\u5f85\u673a）\u4e0b IWDG \u8fd8\u8dd1\u5417？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8dd1\u3002LSI \u5728\u505c\u6b62\/\u5f85\u673a\u6a21\u5f0f\u4e0b\u7ee7\u7eed\u632f\u8361\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fdb\u5165\u4f4e\u529f\u8017\u524d\u8981\u7b97\u597d\u8d85\u65f6，\u5426\u5219\u5524\u9192\u65f6\u5df2\u7ecf\u88ab\u590d\u4f4d\u3002<\/span><\/p>\n

                    \n

                    Q23. \u7a0b\u5e8f\u542f\u52a8\u540e\u600e\u4e48\u77e5\u9053\u4e0a\u6b21\u662f\u88ab\u770b\u95e8\u72d7\u590d\u4f4d\u7684？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8bfb RCC_CSR \u7684 IWDGRSTF \u4f4d\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e3a 1 \u8bf4\u660e\u672c\u6b21\u590d\u4f4d\u7531 IWDG \u5f15\u8d77，\u53ef\u4ee5\u8bb0\u5f55\u65e5\u5fd7\u3001\u8fdb\u5b89\u5168\u6a21\u5f0f，\u7136\u540e\u7528 RMVF \u6e05\u9664\u3002<\/span><\/p>\n

                    \n

                    Q24. \u5582\u72d7\u592a\u9891\u7e41\u6709\u95ee\u9898\u5417？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IWDG \u6ca1\u6709\u7a97\u53e3\u9650\u5236，\u4efb\u4f55\u65f6\u5019\u5582\u90fd\u884c，\u9891\u7e41\u5582\u4e0d\u5f71\u54cd\u529f\u80fd\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f46\u6ce8\u610f\u4e0d\u8981\u56e0\u4e3a\u9891\u7e41\u5582\u72d7\u800c\u63a9\u76d6\u4e86"\u4efb\u52a1\u5076\u5c14\u8d85\u65f6"\u7684\u95ee\u9898\u2014\u2014\u5582\u72d7\u95f4\u9694\u8981\u548c\u4efb\u52a1\u5468\u671f\u5339\u914d\u3002<\/span><\/p>\n

                    \n

                    \u4e94\u3001\u5bf9\u6bd4\u4e0e\u7efc\u5408<\/span><\/h3>\n

                    Q25. IWDG \u548c WWDG \u7684\u6838\u5fc3\u533a\u522b？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2460 \u65f6\u949f：IWDG \u7528 LSI \u72ec\u7acb，WWDG \u7528 APB1 \u4e3b\u65f6\u949f；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2461 \u5582\u72d7\u65f6\u673a：IWDG \u4efb\u610f\u65f6\u523b，WWDG \u5fc5\u987b\u5728\u7a97\u53e3\u5185（\u592a\u65e9\u4e5f\u590d\u4f4d）；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2462 \u4e2d\u65ad：WWDG \u6709 EWI \u65e9\u671f\u5524\u9192\u4e2d\u65ad，IWDG \u6ca1\u6709；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2463 \u7528\u9014：IWDG \u9632\u8dd1\u98de\u7c97\u76d1\u63a7，WWDG \u76d1\u63a7\u65f6\u5e8f\u7cbe\u76d1\u63a7\u3002<\/span><\/p>\n

                    \n

                    Q26. IWDG \u548c\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u82af\u7247\u7684\u533a\u522b？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5185\u90e8 IWDG \u548c MCU \u540c\u751f\u6b7b，MCU \u6574\u7247\u6302\u4e86\u5b83\u4e5f\u6302；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5916\u90e8\u72d7\u82af\u7247\u72ec\u7acb\u4f9b\u7535\u72ec\u7acb\u65f6\u949f，MCU \u5b8c\u5168\u6b7b\u673a\u8fd8\u80fd\u62c9 NRST\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9ad8\u53ef\u9760\u573a\u5408\u4e24\u4e2a\u4e00\u8d77\u4e0a\u3002<\/span><\/p>\n

                    \n

                    Q27. \u4e3a\u4ec0\u4e48 WWDG \u8981"\u592a\u65e9\u5582\u72d7\u4e5f\u590d\u4f4d"？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9632\u6b62\u8dd1\u98de\u540e PC \u968f\u673a\u8df3\u5230\u5582\u72d7\u4ee3\u7801，\u610f\u5916\u628a\u72d7\u5582\u4e86\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6b63\u5e38\u4e3b\u5faa\u73af\u5582\u72d7\u65f6\u673a\u7a33\u5b9a\u843d\u5728\u7a97\u53e3\u5185；<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8dd1\u98de\u540e\u968f\u673a\u5582\u72d7\u5927\u6982\u7387\u843d\u5728\u7a97\u53e3\u5916（\u592a\u65e9），\u76f4\u63a5\u590d\u4f4d\u3002<\/span><\/p>\n

                    \n

                    Q28. WWDG \u7684 EWI \u4e2d\u65ad\u6709\u4ec0\u4e48\u7528？<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8ba1\u6570\u5668\u51cf\u5230\u7a97\u53e3\u4e0a\u9650\u65f6\u89e6\u53d1，\u5728\u771f\u6b63\u590d\u4f4d\u524d\u7ed9 CPU \u62a2\u6551\u7a97\u53e3\u2014\u2014\u4fdd\u5b58\u73b0\u573a\u3001\u8bb0\u5f55\u65e5\u5fd7\u3001\u7d27\u6025\u5582\u72d7\u3001\u4f18\u96c5\u505c\u673a\u3002<\/span><\/p>\n

                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IWDG \u5230 0 \u76f4\u63a5\u590d\u4f4d，\u6ca1\u6709\u8fd9\u4e2a\u673a\u4f1a\u3002<\/span><\/p>\n

                    \u516d\u3001\u624b\u6495\u4ee3\u7801<\/span><\/h3>\n

                    Q29. \u624b\u6495：\u5bc4\u5b58\u5668\u7248\u521d\u59cb\u5316 IWDG，\u8d85\u65f6 2 \u79d2（LSI=32kHz）\u3002<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    IWDG->KR = 0x5555;
                    \nwhile(IWDG->SR & IWDG_SR_PVU);
                    \nIWDG->PR = 5; \/\/ 128 \u5206\u9891 \u2192 CK_CNT=250Hz \u2192 4ms
                    \nwhile(IWDG->SR & IWDG_SR_PVU);
                    \nIWDG->RLR = 500; \/\/ 500\u00d74ms = 2s
                    \nwhile(IWDG->SR & IWDG_SR_RVU);
                    \nIWDG->KR = 0xAAAA;
                    \nIWDG->KR = 0xCCCC;<\/p>\n

                    Q30. \u624b\u6495：\u5582\u72d7\u51fd\u6570 + \u590d\u4f4d\u539f\u56e0\u68c0\u6d4b\u3002<\/span><\/p>\n

                    A：<\/span><\/p>\n

                    void IWDG_Feed(void) {
                    \n IWDG->KR = 0xAAAA;
                    \n}<\/p>\n

                    uint8_t Check_WD_Reset(void) {
                    \n if(RCC->CSR & RCC_CSR_IWDGRSTF) {
                    \n RCC->CSR |= RCC_CSR_RMVF;
                    \n return 1; \/\/ \u4e0a\u6b21\u88ab\u72d7\u590d\u4f4d
                    \n }
                    \n return 0;
                    \n}<\/p>\n

                    \n

                    \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

                    STM32 \u5185\u90e8\u770b\u95e8\u72d7\u4e0e\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u6848\u4f8b\u9a8c\u8bc1\u5b9e\u5f55\u00a0 \u00a0\u4e00\u3001\u4e3a\u4ec0\u4e48\u8981\u804a\u770b\u95e8\u72d7\u8bbe\u5907\u4ea4\u4ed8\u5230\u73b0\u573a\u540e，\u6700\u6015\u7684\u4e0d\u662f\u529f\u80fd\u4e0d\u5bf9，\u800c\u662f\u201c\u4e0d\u56de\u4e86\u201d：\u5ba2\u6237\u6253\u7535\u8bdd\u6765\u8bf4\u8bbe\u5907\u6ca1\u53cd\u5e94，\u53ea\u80fd\u8ba9\u7528\u6237\u65ad\u7535\u91cd\u542f；\u8bbe\u5907\u88c5\u5728\u94c1\u5854\u3001\u4e95\u76d6\u3001\u504f\u8fdc\u7684\u6cf5\u7ad9\u91cc，\u6839\u672c\u6ca1\u6cd5\u6d3e\u4eba\u53bb\u6309\u590d\u4f4d\u952e；OTA \u4e4b\u540e\u5076\u53d1\u6b7b\u673a，\u5b9e\u9a8c\u5ba4\u91cc\u5374\u600e\u4e48\u4e5f\u590d\u73b0\u4e0d\u51fa\u6765\u3002\u770b\u95e8\u72d7（Watchdog）\u5c31\u662f\u89e3\u51b3\u8fd9\u7c7b\u95ee\u9898\u7684\u6700\u540e\u4e00\u9053\u9632\u7ebf<\/p>\n","protected":false},"author":2,"featured_media":118024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[13178,868,217,270,946,269],"topic":[],"class_list":["post-118030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-1024---","tag-868","tag-stm32","tag-270","tag-946","tag-269"],"yoast_head":"\n\u3010STM32\u3011 \u5185\u90e8\u770b\u95e8\u72d7\u4e0e\u5916\u90e8\u786c\u4ef6\u770b\u95e8\u72d7\u6848\u4f8b\u9a8c\u8bc1\u5b9e\u5f55 - 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