[Nucleo F411RE] Update system clock config

Avoid using MCO output of ST-LINK MCU as HSE instead use HSI

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

variants/NUCLEO_F411RE/variant.cpp

@@ -103,18 +103,17 @@ extern "C" {
 /**
   * @brief  System Clock Configuration
   *         The system Clock is configured as follow :
-  *            System Clock source            = PLL (HSE)
-  *            SYSCLK(Hz)                     = 96000000
-  *            HCLK(Hz)                       = 96000000
+  *            System Clock source            = PLL (HSI)
+  *            SYSCLK(Hz)                     = 10000000
+  *            HCLK(Hz)                       = 10000000
   *            AHB Prescaler                  = 1
   *            APB1 Prescaler                 = 2
   *            APB2 Prescaler                 = 1
-  *            HSE Frequency(Hz)              = 8000000
   *            HSI Frequency(Hz)              = 16000000
   *            PLL_M                          = 8
-  *            PLL_N                          = 384
+  *            PLL_N                          = 100
   *            PLL_P                          = 4
-  *            PLL_Q                          = 8
+  *            PLL_Q                          = 2
   *            VDD(V)                         = 3.3
   *            Main regulator output voltage  = Scale1 mode
   *            Flash Latency(WS)              = 3
@@ -127,31 +126,28 @@ WEAK void SystemClock_Config(void)
   RCC_ClkInitTypeDef RCC_ClkInitStruct;
   RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
 
-    /**Configure the main internal regulator output voltage
-    */
+  /* Configure the main internal regulator output voltage */
   __HAL_RCC_PWR_CLK_ENABLE();
 
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 
-    /**Initializes the CPU, AHB and APB busses clocks
-    */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE;
-  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
-  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
+  /* Initializes the CPU, AHB and APB busses clocks */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSE;
+  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = 16;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
   RCC_OscInitStruct.PLL.PLLM = 8;
-  RCC_OscInitStruct.PLL.PLLN = 384;
-  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
-  RCC_OscInitStruct.PLL.PLLQ = 8;
+  RCC_OscInitStruct.PLL.PLLN = 100;
+  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ = 4;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {
-    /* Initialization Error */
-    while(1);
+    _Error_Handler(__FILE__, __LINE__);
   }
 
-    /**Initializes the CPU, AHB and APB busses clocks
-    */
+  /* Initializes the CPU, AHB and APB busses clocks */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
@@ -161,31 +157,25 @@ WEAK void SystemClock_Config(void)
 
   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
   {
-    /* Initialization Error */
-    while(1);
+    _Error_Handler(__FILE__, __LINE__);
   }
 
-  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2S|RCC_PERIPHCLK_RTC;
-  PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
-  PeriphClkInitStruct.PLLI2S.PLLI2SM = 8;
-  PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
-  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
+  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
+  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
   {
-    /* Initialization Error */
-    while(1);
+    _Error_Handler(__FILE__, __LINE__);
   }
 
-    /**Configure the Systick interrupt time
-    */
+  /* Configure the Systick interrupt time */
   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 
-    /**Configure the Systick
-    */
+  /* Configure the Systick */
   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 
   /* SysTick_IRQn interrupt configuration */
   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+
 }
 #ifdef __cplusplus
 }