update 1.8

EVT/EXAM/RCC/HSI_PLL_Source/User/main.c

@@ -4,22 +4,22 @@
  * Version            : V1.0.0
  * Date               : 2021/06/06
  * Description        : Main program body.
-*********************************************************************************
-* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
-* Attention: This software (modified or not) and binary are used for 
-* microcontroller manufactured by Nanjing Qinheng Microelectronics.
-*******************************************************************************/
+ *********************************************************************************
+ * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+ * Attention: This software (modified or not) and binary are used for 
+ * microcontroller manufactured by Nanjing Qinheng Microelectronics.
+ *******************************************************************************/
 
 /*
  *@Note
- HSI or HSI/2 as PLL input clock routine:
- This example demonstrates that HSI or HSI/2 is used as the PLL input clock, and the
- system clock uses the PLL as the clock source.
- Refer to system_ch32v20x.c, system_ch32v20x.h.
- HSI is used as the PLL input clock, and the demonstration system clocks are 24MHz, 48MHz, and 72MHz.
- HSI/2 is used as the PLL input clock, and the demonstration system clock is 24MHz, 48MHz
-
-*/
+ *HSI or HSI/2 as PLL input clock routine:
+ *This example demonstrates that HSI or HSI/2 is used as the PLL input clock, and the
+ *system clock uses the PLL as the clock source.
+ *Refer to system_ch32v20x.c, system_ch32v20x.h.
+ *HSI is used as the PLL input clock, and the demonstration system clocks are 24MHz, 48MHz, and 72MHz.
+ *HSI/2 is used as the PLL input clock, and the demonstration system clock is 24MHz, 48MHz
+ *
+ */
 #include "debug.h"
 
 #define HSI      0   //HSI
@@ -37,9 +37,11 @@
  */
 int main(void)
 {
+    SystemCoreClockUpdate();
     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
     USART_Printf_Init(115200);
     printf("SystemClk:%d\r\n",SystemCoreClock);
+    printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
 
     while(1);
 }