[BSP] Adjust RCC for stm32l412-st-nucleo BSP

bsp/stm32/stm32l412-st-nucleo/README.md

@@ -86,7 +86,7 @@ USB 虚拟 COM 端口默认连接串口 2，在终端工具里打开相应的串
 ```bash
  \ | /
 - RT -     Thread Operating System
- / | \     4.0.0 build Jan  9 2020
+ / | \     4.0.3 build Apr 24 2020
  2006 - 2020 Copyright by rt-thread team
 msh >
 ```

bsp/stm32/stm32l412-st-nucleo/applications/main.c

@@ -12,20 +12,20 @@
 #include <rtdevice.h>
 #include <board.h>
 
-/* defined the LED0 pin: PB3 */
-#define LED0_PIN    GET_PIN(B, 3)
+/* defined the LD4 pin: PB13 */
+#define LD4_PIN    GET_PIN(B, 13)
 
 int main(void)
 {
     int count = 1;
-    /* set LED0 pin mode to output */
-    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
+    /* set LD4 pin mode to output */
+    rt_pin_mode(LD4_PIN, PIN_MODE_OUTPUT);
 
     while (count++)
     {
-        rt_pin_write(LED0_PIN, PIN_HIGH);
+        rt_pin_write(LD4_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
-        rt_pin_write(LED0_PIN, PIN_LOW);
+        rt_pin_write(LD4_PIN, PIN_LOW);
         rt_thread_mdelay(500);
     }
 

bsp/stm32/stm32l412-st-nucleo/board/board.c

@@ -33,8 +33,7 @@ void SystemClock_Config(void)
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
   RCC_OscInitStruct.PLL.PLLM = 1;
-  RCC_OscInitStruct.PLL.PLLN = 16;
-  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
+  RCC_OscInitStruct.PLL.PLLN = 40;
   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)