Kenji Arai
Check program for STM32F303K8 System Clock
Fork of
study_step0
by 
Team_PjL
See
https://os.mbed.com/users/kenjiArai/notebook/nucleo-f303k8-hse-clock/#
Diff: sys_clk.cpp
- Revision:
- 1:e162361e197f
- Child:
- 2:68db9770a517
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys_clk.cpp Sat Sep 30 09:14:54 2017 +0000
@@ -0,0 +1,916 @@
+/* mbed Microcontroller Library
+* Copyright (c) 2006-2017 ARM Limited
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/**
+ * This file configures the system clock as follows:
+ *-----------------------------------------------------------------------------
+ * System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
+ * | (external 8 MHz clock) | (internal 8 MHz)
+ * | 2- USE_PLL_HSE_XTAL |
+ * | (external 8 MHz xtal) |
+ *-----------------------------------------------------------------------------
+ * SYSCLK(MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * AHBCLK (MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * APB1CLK (MHz) | 36 | 32
+ *-----------------------------------------------------------------------------
+ * APB2CLK (MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * USB capable | NO | NO
+ *-----------------------------------------------------------------------------
+ */
+
+// Original source file -> system_clock.c
+// \targets\TARGET_STM\TARGET_STM32F3\TARGET_STM32F303x8\TARGET_NUCLEO_F303K8
+// and
+// Original source file -> stm32f3xx_hal_rcc.c
+// \targets\TARGET_STM\TARGET_STM32F3\device\
+
+// Modified by JH1PJL 2017-9-30
+
+#include "mbed.h"
+#include "stm32f3xx.h"
+#include "mbed_assert.h"
+
+extern Serial pc;
+extern void cpu_freq();
+
+//#define DEBUG
+
+#ifdef DEBUG
+#define DBG(...) pc.printf(__VA_ARGS__)
+#else
+#define DBG(...) {;}
+#endif
+
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
+uint8_t SetSysClock_PLL_HSI(void);
+HAL_StatusTypeDef HAL_RCC_OscConfig_modify(RCC_OscInitTypeDef *);
+
+/**
+ * @brief Configures the System clock source,
+ * PLL Multiplier and Divider factors,
+ * AHB/APBx prescalers and Flash settings
+ * @note This function should be called only once the RCC clock configuration
+ * is reset to the default reset state (done in SystemInit() function).
+ * @param None
+ * @retval None
+ */
+void SetSysClock_HSE_none_Xtal(void)
+{
+ /* 1- Try to start with HSE and external clock */
+ if (SetSysClock_PLL_HSE(1) == 0)
+ {
+ /* 2- If fail start with HSI clock */
+ SetSysClock_PLL_HSI();
+ }
+}
+
+/******************************************************************************/
+/* PLL (clocked by HSE) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ DBG("%u:\r\n", __LINE__);
+ /* Enable HSE oscillator and activate PLL with HSE as source */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+ if (bypass == 0) {
+ /* External 8 MHz xtal on OSC_IN/OSC_OUT */
+ RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+ DBG("%u:\r\n", __LINE__);
+ } else {
+ /* External 8 MHz clock on OSC_IN */
+ RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
+ DBG("%u:\r\n", __LINE__);
+ }
+ RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
+ DBG("%u:\r\n", __LINE__);
+#ifndef DEBUG
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+#else
+ if (HAL_RCC_OscConfig_modify(&RCC_OscInitStruct) != HAL_OK) {
+#endif
+ DBG("%u:\r\n", __LINE__);
+ return 0; // FAIL
+ }
+
+ /* 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);
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
+ DBG("%u:\r\n", __LINE__);
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+ DBG("%u:\r\n", __LINE__);
+ return 0; // FAIL
+ }
+ return 1; // OK
+}
+
+/******************************************************************************/
+/* Configuration PLL (clocked by HSE) used as System clock source */
+/******************************************************************************/
+HAL_StatusTypeDef
+HAL_RCC_OscConfig_modify(RCC_OscInitTypeDef *RCC_OscInitStruct)
+{
+ uint32_t tickstart = 0U;
+
+ /* Check the parameters */
+ assert_param(RCC_OscInitStruct != NULL);
+ assert_param(IS_RCC_OSCILLATORTYPE(RCC_OscInitStruct->OscillatorType));
+ DBG("%u:\r\n", __LINE__);
+
+ /*------------------------------- HSE Configuration ------------------------*/
+ if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSE)
+ == RCC_OSCILLATORTYPE_HSE)
+ {
+ DBG("%u:\r\n", __LINE__);
+ /* Check the parameters */
+ assert_param(IS_RCC_HSE(RCC_OscInitStruct->HSEState));
+
+ /* When the HSE is used as system clock or clock source for PLL
+ in these cases it is not allowed to be disabled */
+ if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_HSE)
+ || ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_PLLCLK)
+ && (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSE)))
+ {
+ DBG("%u:\r\n", __LINE__);
+ if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
+ && (RCC_OscInitStruct->HSEState == RCC_HSE_OFF))
+ {
+ DBG("%u:\r\n", __LINE__);
+ return HAL_ERROR;
+ }
+ }
+ else
+ {
+ DBG("%u:\r\n", __LINE__);
+ /* Set the new HSE configuration ---------------------------------------*/
+ __HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState);
+
+#if defined(RCC_CFGR_PLLSRC_HSI_DIV2)
+ DBG("%u:\r\n", __LINE__);
+ /* Configure the HSE predivision factor --------------------------------*/
+ __HAL_RCC_HSE_PREDIV_CONFIG(RCC_OscInitStruct->HSEPredivValue);
+#endif /* RCC_CFGR_PLLSRC_HSI_DIV2 */
+
+ /* Check the HSE State */
+ if(RCC_OscInitStruct->HSEState != RCC_HSE_OFF)
+ {
+ DBG("%u:\r\n", __LINE__);
+// RCC->CR != 0x01000000;
+// DBG("%u: RCC->CR=0x%x\r\n", __LINE__, RCC->CR);
+// DBG("%u: RCC->CR=0x%x\r\n", __LINE__, RCC->CR);
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSE is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
+ {
+ DBG("%u:\r\n", __LINE__);
+ return HAL_TIMEOUT;
+ }
+ }
+// DBG("%u: RCC->CR=0x%x\r\n", __LINE__, RCC->CR);
+ }
+ else
+ {
+ DBG("%u:\r\n", __LINE__);
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSE is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
+ {
+ DBG("%u:\r\n", __LINE__);
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ }
+ /*-------------------------------- PLL Configuration -----------------------*/
+ /* Check the parameters */
+ assert_param(IS_RCC_PLL(RCC_OscInitStruct->PLL.PLLState));
+ if ((RCC_OscInitStruct->PLL.PLLState) != RCC_PLL_NONE)
+ {
+ DBG("%u:\r\n", __LINE__);
+ /* Check if the PLL is used as system clock or not */
+ if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_PLLCLK)
+ {
+ DBG("%u:\r\n", __LINE__);
+ if((RCC_OscInitStruct->PLL.PLLState) == RCC_PLL_ON)
+ {
+ DBG("%u:\r\n", __LINE__);
+ /* Check the parameters */
+ assert_param(IS_RCC_PLLSOURCE(RCC_OscInitStruct->PLL.PLLSource));
+ assert_param(IS_RCC_PLL_MUL(RCC_OscInitStruct->PLL.PLLMUL));
+#if defined(RCC_CFGR_PLLSRC_HSI_PREDIV)
+ assert_param(IS_RCC_PREDIV(RCC_OscInitStruct->PLL.PREDIV));
+#endif
+
+ /* Disable the main PLL. */
+ __HAL_RCC_PLL_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
+ {
+ DBG("%u:\r\n", __LINE__);
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ DBG("%u:\r\n", __LINE__);
+ return HAL_TIMEOUT;
+ }
+ }
+
+#if defined(RCC_CFGR_PLLSRC_HSI_PREDIV)
+ DBG("%u:\r\n", __LINE__);
+ /* Configure the main PLL clock source,
+ predivider and multiplication factor. */
+ __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource,
+ RCC_OscInitStruct->PLL.PREDIV,
+ RCC_OscInitStruct->PLL.PLLMUL);
+#else
+ DBG("%u:\r\n", __LINE__);
+ /* Configure the main PLL clock source and multiplication factor. */
+ __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource,
+ RCC_OscInitStruct->PLL.PLLMUL);
+#endif /* RCC_CFGR_PLLSRC_HSI_PREDIV */
+//??????????????????????????????????????????????????????????????????????????????
+// YOU CANNOT USE DEBUG CODE "DBG("%u:\r\n", __LINE__);"
+// BECAUSE CLOCK WILL CHANGE AND UART CLOCK IS DIFFERENT
+
+ /* Enable the main PLL. */
+ __HAL_RCC_PLL_ENABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ else
+ {
+ /* Disable the main PLL. */
+ __HAL_RCC_PLL_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ else
+ {
+ return HAL_ERROR;
+ }
+ }
+ return HAL_OK;
+}
+
+/******************************************************************************/
+/* PLL (clocked by HSI) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSI(void)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ /* Enable HSI oscillator and activate PLL with HSI as source */
+ RCC_OscInitStruct.OscillatorType =
+ RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+ RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+ RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
+ RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz(8MHz/2*16)
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+ return 0; // FAIL
+ }
+
+ /* 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);
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+ return 0; // FAIL
+ }
+ return 1; // OK
+}
+
+//***************************************************************************************************************************************************************
+// Following source codes are in mbed-os latest version as of 2017-09-30
+//***************************************************************************************************************************************************************
+//------------------------------------------------------------------------------
+// Original source file -> stm32f3xx_hal_rcc.c
+// \targets\TARGET_STM\TARGET_STM32F3\device\
+#if 0
+#if 0
+HAL_StatusTypeDef HAL_RCC_OscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct)
+{
+ uint32_t tickstart = 0U;
+
+ /* Check the parameters */
+ assert_param(RCC_OscInitStruct != NULL);
+ assert_param(IS_RCC_OSCILLATORTYPE(RCC_OscInitStruct->OscillatorType));
+
+ /*------------------------------- HSE Configuration ------------------------*/
+ if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSE) == RCC_OSCILLATORTYPE_HSE)
+ {
+ /* Check the parameters */
+ assert_param(IS_RCC_HSE(RCC_OscInitStruct->HSEState));
+
+ /* When the HSE is used as system clock or clock source for PLL in these cases it is not allowed to be disabled */
+ if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_HSE)
+ || ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_PLLCLK) && (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSE)))
+ {
+ if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET) && (RCC_OscInitStruct->HSEState == RCC_HSE_OFF))
+ {
+ return HAL_ERROR;
+ }
+ }
+ else
+ {
+ /* Set the new HSE configuration ---------------------------------------*/
+ __HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState);
+
+#if defined(RCC_CFGR_PLLSRC_HSI_DIV2)
+ /* Configure the HSE predivision factor --------------------------------*/
+ __HAL_RCC_HSE_PREDIV_CONFIG(RCC_OscInitStruct->HSEPredivValue);
+#endif /* RCC_CFGR_PLLSRC_HSI_DIV2 */
+
+ /* Check the HSE State */
+ if(RCC_OscInitStruct->HSEState != RCC_HSE_OFF)
+ {
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSE is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ else
+ {
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSE is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ }
+ /*----------------------------- HSI Configuration --------------------------*/
+ if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSI) == RCC_OSCILLATORTYPE_HSI)
+ {
+ /* Check the parameters */
+ assert_param(IS_RCC_HSI(RCC_OscInitStruct->HSIState));
+ assert_param(IS_RCC_CALIBRATION_VALUE(RCC_OscInitStruct->HSICalibrationValue));
+
+ /* Check if HSI is used as system clock or as PLL source when PLL is selected as system clock */
+ if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_HSI)
+ || ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_SYSCLKSOURCE_STATUS_PLLCLK) && (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSI)))
+ {
+ /* When HSI is used as system clock it will not disabled */
+ if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) && (RCC_OscInitStruct->HSIState != RCC_HSI_ON))
+ {
+ return HAL_ERROR;
+ }
+ /* Otherwise, just the calibration is allowed */
+ else
+ {
+ /* Adjusts the Internal High Speed oscillator (HSI) calibration value.*/
+ __HAL_RCC_HSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->HSICalibrationValue);
+ }
+ }
+ else
+ {
+ /* Check the HSI State */
+ if(RCC_OscInitStruct->HSIState != RCC_HSI_OFF)
+ {
+ /* Enable the Internal High Speed oscillator (HSI). */
+ __HAL_RCC_HSI_ENABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSI is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSI_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+
+ /* Adjusts the Internal High Speed oscillator (HSI) calibration value.*/
+ __HAL_RCC_HSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->HSICalibrationValue);
+ }
+ else
+ {
+ /* Disable the Internal High Speed oscillator (HSI). */
+ __HAL_RCC_HSI_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till HSI is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > HSI_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ }
+ /*------------------------------ LSI Configuration -------------------------*/
+ if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_LSI) == RCC_OSCILLATORTYPE_LSI)
+ {
+ /* Check the parameters */
+ assert_param(IS_RCC_LSI(RCC_OscInitStruct->LSIState));
+
+ /* Check the LSI State */
+ if(RCC_OscInitStruct->LSIState != RCC_LSI_OFF)
+ {
+ /* Enable the Internal Low Speed oscillator (LSI). */
+ __HAL_RCC_LSI_ENABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till LSI is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > LSI_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ else
+ {
+ /* Disable the Internal Low Speed oscillator (LSI). */
+ __HAL_RCC_LSI_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till LSI is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > LSI_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ /*------------------------------ LSE Configuration -------------------------*/
+ if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_LSE) == RCC_OSCILLATORTYPE_LSE)
+ {
+ FlagStatus pwrclkchanged = RESET;
+
+ /* Check the parameters */
+ assert_param(IS_RCC_LSE(RCC_OscInitStruct->LSEState));
+
+ /* Update LSE configuration in Backup Domain control register */
+ /* Requires to enable write access to Backup Domain of necessary */
+ if(__HAL_RCC_PWR_IS_CLK_DISABLED())
+ {
+ __HAL_RCC_PWR_CLK_ENABLE();
+ pwrclkchanged = SET;
+ }
+
+ if(HAL_IS_BIT_CLR(PWR->CR, PWR_CR_DBP))
+ {
+ /* Enable write access to Backup domain */
+ SET_BIT(PWR->CR, PWR_CR_DBP);
+
+ /* Wait for Backup domain Write protection disable */
+ tickstart = HAL_GetTick();
+
+ while(HAL_IS_BIT_CLR(PWR->CR, PWR_CR_DBP))
+ {
+ if((HAL_GetTick() - tickstart) > RCC_DBP_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+
+ /* Set the new LSE configuration -----------------------------------------*/
+ __HAL_RCC_LSE_CONFIG(RCC_OscInitStruct->LSEState);
+ /* Check the LSE State */
+ if(RCC_OscInitStruct->LSEState != RCC_LSE_OFF)
+ {
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till LSE is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ else
+ {
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till LSE is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+
+ /* Require to disable power clock if necessary */
+ if(pwrclkchanged == SET)
+ {
+ __HAL_RCC_PWR_CLK_DISABLE();
+ }
+ }
+
+ /*-------------------------------- PLL Configuration -----------------------*/
+ /* Check the parameters */
+ assert_param(IS_RCC_PLL(RCC_OscInitStruct->PLL.PLLState));
+ if ((RCC_OscInitStruct->PLL.PLLState) != RCC_PLL_NONE)
+ {
+ /* Check if the PLL is used as system clock or not */
+ if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_PLLCLK)
+ {
+ if((RCC_OscInitStruct->PLL.PLLState) == RCC_PLL_ON)
+ {
+ /* Check the parameters */
+ assert_param(IS_RCC_PLLSOURCE(RCC_OscInitStruct->PLL.PLLSource));
+ assert_param(IS_RCC_PLL_MUL(RCC_OscInitStruct->PLL.PLLMUL));
+#if defined(RCC_CFGR_PLLSRC_HSI_PREDIV)
+ assert_param(IS_RCC_PREDIV(RCC_OscInitStruct->PLL.PREDIV));
+#endif
+
+ /* Disable the main PLL. */
+ __HAL_RCC_PLL_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+
+#if defined(RCC_CFGR_PLLSRC_HSI_PREDIV)
+ /* Configure the main PLL clock source, predivider and multiplication factor. */
+ __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource,
+ RCC_OscInitStruct->PLL.PREDIV,
+ RCC_OscInitStruct->PLL.PLLMUL);
+#else
+ /* Configure the main PLL clock source and multiplication factor. */
+ __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource,
+ RCC_OscInitStruct->PLL.PLLMUL);
+#endif /* RCC_CFGR_PLLSRC_HSI_PREDIV */
+ /* Enable the main PLL. */
+ __HAL_RCC_PLL_ENABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is ready */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ else
+ {
+ /* Disable the main PLL. */
+ __HAL_RCC_PLL_DISABLE();
+
+ /* Get Start Tick */
+ tickstart = HAL_GetTick();
+
+ /* Wait till PLL is disabled */
+ while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
+ {
+ if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ else
+ {
+ return HAL_ERROR;
+ }
+ }
+
+ return HAL_OK;
+}
+
+#endif
+
+// Original source file -> system_clock.c
+// \targets\TARGET_STM\TARGET_STM32F3\TARGET_STM32F303x8\TARGET_NUCLEO_F303K8
+#if 0
+/* mbed Microcontroller Library
+* Copyright (c) 2006-2017 ARM Limited
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/**
+ * This file configures the system clock as follows:
+ *-----------------------------------------------------------------------------
+ * System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
+ * | (external 8 MHz clock) | (internal 8 MHz)
+ * | 2- USE_PLL_HSE_XTAL |
+ * | (external 8 MHz xtal) |
+ *-----------------------------------------------------------------------------
+ * SYSCLK(MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * AHBCLK (MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * APB1CLK (MHz) | 36 | 32
+ *-----------------------------------------------------------------------------
+ * APB2CLK (MHz) | 72 | 64
+ *-----------------------------------------------------------------------------
+ * USB capable | NO | NO
+ *-----------------------------------------------------------------------------
+ */
+
+
+#include "stm32f3xx.h"
+#include "mbed_assert.h"
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+ Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
+ This value must be a multiple of 0x200. */
+
+// clock source is selected with CLOCK_SOURCE in json config
+#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
+#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
+#define USE_PLL_HSI 0x2 // Use HSI internal clock
+
+#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
+#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
+
+#if ((CLOCK_SOURCE) & USE_PLL_HSI)
+uint8_t SetSysClock_PLL_HSI(void);
+#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
+
+/**
+ * @brief Setup the microcontroller system
+ * Initialize the FPU setting, vector table location and the PLL configuration is reset.
+ * @param None
+ * @retval None
+ */
+void SystemInit(void)
+{
+ /* FPU settings ------------------------------------------------------------*/
+#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
+ SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
+#endif
+
+ /* Reset the RCC clock configuration to the default reset state ------------*/
+ /* Set HSION bit */
+ RCC->CR |= 0x00000001U;
+
+ /* Reset CFGR register */
+ RCC->CFGR &= 0xF87FC00CU;
+
+ /* Reset HSEON, CSSON and PLLON bits */
+ RCC->CR &= 0xFEF6FFFFU;
+
+ /* Reset HSEBYP bit */
+ RCC->CR &= 0xFFFBFFFFU;
+
+ /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
+ RCC->CFGR &= 0xFF80FFFFU;
+
+ /* Reset PREDIV1[3:0] bits */
+ RCC->CFGR2 &= 0xFFFFFFF0U;
+
+ /* Reset USARTSW[1:0], I2CSW and TIMs bits */
+ RCC->CFGR3 &= 0xFF00FCCCU;
+
+ /* Disable all interrupts */
+ RCC->CIR = 0x00000000U;
+
+#ifdef VECT_TAB_SRAM
+ SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
+#else
+ SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
+#endif
+
+}
+
+
+/**
+ * @brief Configures the System clock source, PLL Multiplier and Divider factors,
+ * AHB/APBx prescalers and Flash settings
+ * @note This function should be called only once the RCC clock configuration
+ * is reset to the default reset state (done in SystemInit() function).
+ * @param None
+ * @retval None
+ */
+
+void SetSysClock(void)
+{
+#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
+ /* 1- Try to start with HSE and external clock */
+ if (SetSysClock_PLL_HSE(1) == 0)
+#endif
+ {
+#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
+ /* 2- If fail try to start with HSE and external xtal */
+ if (SetSysClock_PLL_HSE(0) == 0)
+#endif
+ {
+#if ((CLOCK_SOURCE) & USE_PLL_HSI)
+ /* 3- If fail start with HSI clock */
+ if (SetSysClock_PLL_HSI() == 0)
+#endif
+ {
+ while(1) {
+ MBED_ASSERT(1);
+ }
+ }
+ }
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
+}
+
+#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
+/******************************************************************************/
+/* PLL (clocked by HSE) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ /* Enable HSE oscillator and activate PLL with HSE as source */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+ if (bypass == 0) {
+ RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
+ } else {
+ RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
+ }
+ RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+ return 0; // FAIL
+ }
+
+ /* 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);
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+ return 0; // FAIL
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //if (bypass == 0)
+ // HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
+ //else
+ // HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
+
+ return 1; // OK
+}
+#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
+
+#if ((CLOCK_SOURCE) & USE_PLL_HSI)
+/******************************************************************************/
+/* PLL (clocked by HSI) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSI(void)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ /* Enable HSI oscillator and activate PLL with HSI as source */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+ RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+ RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
+ RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+ return 0; // FAIL
+ }
+
+ /* 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);
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+ return 0; // FAIL
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
+
+ return 1; // OK
+}
+#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
+
+#endif
\ No newline at end of file