V2.2

EVT/EXAM/PWR/PVD_Wakeup/User/ch32v20x_it.c

@@ -38,6 +38,7 @@ void NMI_Handler(void)
  */
 void HardFault_Handler(void)
 {
+  NVIC_SystemReset();
   while (1)
   {
   }

EVT/EXAM/PWR/PVD_Wakeup/User/main.c

@@ -60,7 +60,7 @@ void PVD_Init(void)
     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
     NVIC_Init(&NVIC_InitStructure);
 
-    PWR_PVDLevelConfig(PWR_PVDLevel_2V2);
+    PWR_PVDLevelConfig(PWR_PVDLevel_MODE0);
 
     PWR_PVDCmd(ENABLE);
 }

EVT/EXAM/PWR/PVD_Wakeup/User/system_ch32v20x.c

@@ -159,8 +159,8 @@ void SystemCoreClockUpdate (void)
       }
       else
       {
-#if defined (CH32V20x_D8W)
-        if((RCC->CFGR0 & (3<<22)) == (3<<22))
+#if defined (CH32V20x_D8W) || defined (CH32V20x_D8)
+        if(((RCC->CFGR0 & (3<<22)) == (3<<22)) && (RCC_USB5PRE_JUDGE()== SET))
         {
           SystemCoreClock = ((HSE_VALUE>>1)) * pllmull;
         }