Check program for STM32F303K8 System Clock
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https://os.mbed.com/users/kenjiArai/notebook/nucleo-f303k8-hse-clock/#
Diff: sys_clk.cpp
- Revision:
- 1:e162361e197f
- Child:
- 2:68db9770a517
diff -r 1672d0903bdc -r e162361e197f sys_clk.cpp --- /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