V2.0

EVT/EXAM/USB/USBD/CH372/User/Main.c

@@ -62,7 +62,7 @@ void Var_Init(void)
 int main(void)
 {   
     uint8_t ret;
-    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
+    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
     SystemCoreClockUpdate();
     Delay_Init();
     USART_Printf_Init(115200);

EVT/EXAM/USB/USBD/CH372/User/USBLIB/CONFIG/hw_config.c

@@ -37,7 +37,7 @@ void USBWakeUp_IRQHandler(void)
 /*******************************************************************************
  * @fn           USBWakeUp_IRQHandler
  *
- * @brief  T     his function handles USB exception.
+ * @brief  This function handles USB exception.
  *
  * @return None
  */

EVT/EXAM/USB/USBD/CH372/User/USBLIB/CONFIG/usb_desc.c

@@ -100,7 +100,7 @@ const uint8_t USBD_StringVendor[USBD_SIZE_STRING_VENDOR] = {
 const uint8_t USBD_StringProduct[USBD_SIZE_STRING_PRODUCT] = {
 	USBD_SIZE_STRING_PRODUCT,         
 	USB_STRING_DESCRIPTOR_TYPE,        
-    'C', 0, 'H', 0, '3', 0, '2', 0, 'F', 0, '2', 0 , '0', 0, 'x', 0
+    'C', 0, 'H', 0, '3', 0, '2', 0, 'V', 0, '2', 0 , '0', 0, 'x', 0
 };
 
 /* USB Device String Serial */

EVT/EXAM/USB/USBD/CH372/User/ch32v20x_it.c

@@ -23,6 +23,9 @@ void HardFault_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
  */
 void NMI_Handler(void)
 {
+  while (1)
+  {
+  }
 }
 
 /*********************************************************************

EVT/EXAM/USB/USBD/CH372/User/system_ch32v20x.c

@@ -111,10 +111,10 @@ static void SetSysClockTo144_HSI( void );
 void SystemInit (void)
 {
   RCC->CTLR |= (uint32_t)0x00000001;
-  RCC->CFGR0 &= (uint32_t)0xF8FF0000;
+  RCC->CFGR0 &= (uint32_t)0xF0FF0000;
   RCC->CTLR &= (uint32_t)0xFEF6FFFF;
   RCC->CTLR &= (uint32_t)0xFFFBFFFF;
-  RCC->CFGR0 &= (uint32_t)0xFF80FFFF;
+  RCC->CFGR0 &= (uint32_t)0xFF00FFFF;
   RCC->INTR = 0x009F0000;    
   SetSysClock();
 }