diff --git a/sysmgr/sys_mgr.cpp b/sysmgr/sys_mgr.cpp
index 0ae2fdf..889c6b9 100644
--- a/sysmgr/sys_mgr.cpp
+++ b/sysmgr/sys_mgr.cpp
@@ -2,7 +2,6 @@
 
 #include <stdlib.h>
 
-
 using namespace iflytop;
 
 #define TAG "SysMgr"
@@ -42,11 +41,62 @@ static size_t get_free_heap_size() {
 /***********************************************************************************************************************
  *                                                   STM32_ERROR_IRQ                                                   *
  ***********************************************************************************************************************/
-void SysMgr_on_NMI_Handler(void) { ZLOGI(TAG, "on NMI_Handler"); }
-void SysMgr_on_HardFault_Handler(void) { ZLOGI(TAG, "on HardFault_Handler"); }
-void SysMgr_on_MemManage_Handler(void) { ZLOGI(TAG, "on MemManage_Handler"); }
-void SysMgr_on_BusFault_Handler(void) { ZLOGI(TAG, "on BusFault_Handler"); }
-void SysMgr_on_UsageFault_Handler(void) { ZLOGI(TAG, "on UsageFault_Handler"); }
+// void SysMgr_on_NMI_Handler(void) { ZLOGI(TAG, "on NMI_Handler"); }
+// void SysMgr_on_HardFault_Handler(void) { ZLOGI(TAG, "on HardFault_Handler"); }
+// void SysMgr_on_MemManage_Handler(void) { ZLOGI(TAG, "on MemManage_Handler"); }
+// void SysMgr_on_BusFault_Handler(void) { ZLOGI(TAG, "on BusFault_Handler"); }
+// void SysMgr_on_UsageFault_Handler(void) { ZLOGI(TAG, "on UsageFault_Handler"); }
+
+void NMI_Handler(void) {
+  printf("E:%s\n", __FUNCTION__);
+  NVIC_SystemReset();
+}
+void HardFault_Handler(void) {
+  printf("E:%s\n", __FUNCTION__);
+  NVIC_SystemReset();
+}
+
+void MemManage_Handler(void) {
+  printf("E:%s\n", __FUNCTION__);
+  NVIC_SystemReset();
+}
+
+void BusFault_Handler(void) {
+  printf("E:%s\n", __FUNCTION__);
+  NVIC_SystemReset();
+}
+void UsageFault_Handler(void) {
+  printf("E:%s\n", __FUNCTION__);
+  NVIC_SystemReset();
+}
+void DebugMon_Handler(void) {}
+
+static void PVD_Init(void) {
+  PWR_PVDTypeDef PvdStruct;
+
+  HAL_PWR_EnablePVD();
+
+  PvdStruct.PVDLevel = PWR_PVDLEVEL_6; /* set PVD thr to 3.1v */
+  PvdStruct.Mode     = PWR_PVD_MODE_IT_RISING;
+  HAL_PWR_ConfigPVD(&PvdStruct);
+
+  /* enable lost power irq */
+  HAL_NVIC_SetPriority(PVD_IRQn, 0, 0); /*  */
+  HAL_NVIC_EnableIRQ(PVD_IRQn);         /*  */
+}
+
+void PVD_IRQHandler(void) {
+  if (__HAL_PWR_GET_FLAG(PWR_FLAG_PVDO)) /* 1为VDD小于PVD阈值,掉电情况 */
+  {
+    /* 掉电前的紧急处理 */
+    printf("low power detect......\n");
+    for (size_t i = 0; i < 1000; i++) {
+      // wait for lost power
+      printf("low power detect......\n");
+    }
+    NVIC_SystemReset();
+  }
+}
 
 /***********************************************************************************************************************
  *                                                   FREERTOS_ERROR                                                    *
@@ -85,6 +135,8 @@ void SysMgr::initedFinished() {  //
     m_task[i].Id = pxTaskStatusArray[i].xHandle;
   }
   ZASSERT_INFO(m_ntask < SDK_MAX_TASK, "task num is too large, please increase SDK_MAX_TASK");
+
+  PVD_Init();
 }
 
 size_t SysMgr::osGetMinimumEverFreeHeapSize() { return ::xPortGetMinimumEverFreeHeapSize(); }
@@ -95,8 +147,6 @@ size_t SysMgr::osGetFreeSysHeapSize() { return get_free_heap_size(); }
 int32_t SysMgr::getTaskNum() { return m_ntask; }
 
 void SysMgr::dumpSysInfo() {
-
-
   zlog("---------------Heap Info--------------\n");
   zlog("MinimumEverFreeHeapSize     : %d\n", osGetMinimumEverFreeHeapSize());
   zlog("RTOS FreeHeapSize           : %d\n", osGetFreeHeapSize());