Add clock configuration

Generated throught STM32CubeMX

Set SYSCLK to 96 MHz to have 48 MHz clocks

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

Author: fpistm

variants/NUCLEO_F411RE/variant.cpp

@@ -136,71 +136,90 @@ extern "C" {
 /**
   * @brief  System Clock Configuration
   *         The system Clock is configured as follow :
-  *            System Clock source            = PLL (HSI)
-  *            SYSCLK(Hz)                     = 84000000
-  *            HCLK(Hz)                       = 84000000
+  *            System Clock source            = PLL (HSE)
+  *            SYSCLK(Hz)                     = 96000000
+  *            HCLK(Hz)                       = 96000000
   *            AHB Prescaler                  = 1
   *            APB1 Prescaler                 = 2
   *            APB2 Prescaler                 = 1
+  *            HSE Frequency(Hz)              = 8000000
   *            HSI Frequency(Hz)              = 16000000
-  *            PLL_M                          = 16
-  *            PLL_N                          = 336
+  *            PLL_M                          = 8
+  *            PLL_N                          = 384
   *            PLL_P                          = 4
-  *            PLL_Q                          = 7
+  *            PLL_Q                          = 8
   *            VDD(V)                         = 3.3
-  *            Main regulator output voltage  = Scale2 mode
-  *            Flash Latency(WS)              = 2
+  *            Main regulator output voltage  = Scale1 mode
+  *            Flash Latency(WS)              = 3
   * @param  None
   * @retval None
   */
 WEAK void SystemClock_Config(void)
 {
-  RCC_ClkInitTypeDef RCC_ClkInitStruct;
   RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
 
-  /* Enable Power Control clock */
+    /**Configure the main internal regulator output voltage
+    */
   __HAL_RCC_PWR_CLK_ENABLE();
 
-  /* The voltage scaling allows optimizing the power consumption when the device is
-     clocked below the maximum system frequency, to update the voltage scaling value
-	 regarding system frequency refer to product datasheet.  */
-  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 
-  /* Enable HSI Oscillator and activate PLL with HSI as source */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
-  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
-  RCC_OscInitStruct.HSICalibrationValue = 0x10;
+    /**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;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
-  RCC_OscInitStruct.PLL.PLLM = 16;
-  RCC_OscInitStruct.PLL.PLLN = 336;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLM = 8;
+  RCC_OscInitStruct.PLL.PLLN = 384;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
-  RCC_OscInitStruct.PLL.PLLQ = 7;
-  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+  RCC_OscInitStruct.PLL.PLLQ = 8;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {
     /* Initialization Error */
     while(1);
   }
-  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
-     clocks dividers */
-  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
+
+    /**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;
   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
-  if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
+
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
   {
     /* Initialization Error */
     while(1);
   }
+
+  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;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
+  {
+    /* Initialization Error */
+    while(1);
+  }
+
+    /**Configure the Systick interrupt time
+    */
   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 
+    /**Configure the Systick
+    */
   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 
   /* SysTick_IRQn interrupt configuration */
   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
 }
-
 #ifdef __cplusplus
 }
 #endif