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Modified version of the mbed library for use with the Nucleo boards.
Dependents: EEPROMWrite Full-Project
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Diff: targets/cmsis/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F303K8/system_stm32f3xx.c
- Revision:
- 634:ac7d6880524d
- Parent:
- 633:188f3ef4d258
- Child:
- 635:a11c0372f0ba
--- a/targets/cmsis/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F303K8/system_stm32f3xx.c Mon Sep 28 15:00:09 2015 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,456 +0,0 @@
-/**
- ******************************************************************************
- * @file system_stm32f3xx.c
- * @author MCD Application Team
- * @version V2.1.0
- * @date 12-Sept-2014
- * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
- *
- * 1. This file provides two functions and one global variable to be called from
- * user application:
- * - SystemInit(): This function is called at startup just after reset and
- * before branch to main program. This call is made inside
- * the "startup_stm32f3xx.s" file.
- *
- * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
- * by the user application to setup the SysTick
- * timer or configure other parameters.
- *
- * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
- * be called whenever the core clock is changed
- * during program execution.
- *
- * 2. After each device reset the HSI (8 MHz) is used as system clock source.
- * Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
- * configure the system clock before to branch to main program.
- *
- * 3. This file configures the system clock as follows:
- *-----------------------------------------------------------------------------
- * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
- * | (external 8 MHz clock) | (internal 8 MHz)
- * | 2- 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 (48 MHz precise clock) | NO | NO
- *-----------------------------------------------------------------------------
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- */
-
-/** @addtogroup CMSIS
- * @{
- */
-
-/** @addtogroup stm32f3xx_system
- * @{
- */
-
-/** @addtogroup STM32F3xx_System_Private_Includes
- * @{
- */
-
-#include "stm32f3xx.h"
-#include "hal_tick.h"
-
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
- * @{
- */
-
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_Defines
- * @{
- */
-#if !defined (HSE_VALUE)
- #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
- This value can be provided and adapted by the user application. */
-#endif /* HSE_VALUE */
-
-#if !defined (HSI_VALUE)
- #define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
- This value can be provided and adapted by the user application. */
-#endif /* HSI_VALUE */
-
-/*!< 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. */
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_Macros
- * @{
- */
-
-/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
-#define USE_PLL_HSE_EXTC (1) /* Use external clock */
-#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
-
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_Variables
- * @{
- */
- /* This variable is updated in three ways:
- 1) by calling CMSIS function SystemCoreClockUpdate()
- 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
- 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
- Note: If you use this function to configure the system clock there is no need to
- call the 2 first functions listed above, since SystemCoreClock variable is
- updated automatically.
- */
-uint32_t SystemCoreClock = 72000000;
-const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
-
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
- * @{
- */
-
-#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
-uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
-#endif
-
-uint8_t SetSysClock_PLL_HSI(void);
-
-/**
- * @}
- */
-
-/** @addtogroup STM32F3xx_System_Private_Functions
- * @{
- */
-
-/**
- * @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 |= (uint32_t)0x00000001;
-
- /* Reset CFGR register */
- RCC->CFGR &= 0xF87FC00C;
-
- /* Reset HSEON, CSSON and PLLON bits */
- RCC->CR &= (uint32_t)0xFEF6FFFF;
-
- /* Reset HSEBYP bit */
- RCC->CR &= (uint32_t)0xFFFBFFFF;
-
- /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
- RCC->CFGR &= (uint32_t)0xFF80FFFF;
-
- /* Reset PREDIV1[3:0] bits */
- RCC->CFGR2 &= (uint32_t)0xFFFFFFF0;
-
- /* Reset USARTSW[1:0], I2CSW and TIMs bits */
- RCC->CFGR3 &= (uint32_t)0xFF00FCCC;
-
- /* Disable all interrupts */
- RCC->CIR = 0x00000000;
-
-#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
-
- /* Configure the Cube driver */
- SystemCoreClock = 8000000; // At this stage the HSI is used as system clock
- HAL_Init();
-
- /* Configure the System clock source, PLL Multiplier and Divider factors,
- AHB/APBx prescalers and Flash settings */
- SetSysClock();
-
- /* Reset the timer to avoid issues after the RAM initialization */
- TIM_MST_RESET_ON;
- TIM_MST_RESET_OFF;
-}
-
-/**
- * @brief Update SystemCoreClock variable according to Clock Register Values.
- * The SystemCoreClock variable contains the core clock (HCLK), it can
- * be used by the user application to setup the SysTick timer or configure
- * other parameters.
- *
- * @note Each time the core clock (HCLK) changes, this function must be called
- * to update SystemCoreClock variable value. Otherwise, any configuration
- * based on this variable will be incorrect.
- *
- * @note - The system frequency computed by this function is not the real
- * frequency in the chip. It is calculated based on the predefined
- * constant and the selected clock source:
- *
- * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
- *
- * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
- *
- * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
- * or HSI_VALUE(*) multiplied/divided by the PLL factors.
- *
- * (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
- * 8 MHz) but the real value may vary depending on the variations
- * in voltage and temperature.
- *
- * (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
- * 8 MHz), user has to ensure that HSE_VALUE is same as the real
- * frequency of the crystal used. Otherwise, this function may
- * have wrong result.
- *
- * - The result of this function could be not correct when using fractional
- * value for HSE crystal.
- *
- * @param None
- * @retval None
- */
-void SystemCoreClockUpdate (void)
-{
- uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
-
- /* Get SYSCLK source -------------------------------------------------------*/
- tmp = RCC->CFGR & RCC_CFGR_SWS;
-
- switch (tmp)
- {
- case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
- SystemCoreClock = HSI_VALUE;
- break;
- case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
- SystemCoreClock = HSE_VALUE;
- break;
- case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
- /* Get PLL clock source and multiplication factor ----------------------*/
- pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
- pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
- pllmull = ( pllmull >> 18) + 2;
-
-#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
- predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
- if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
- {
- /* HSE oscillator clock selected as PREDIV1 clock entry */
- SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
- }
- else
- {
- /* HSI oscillator clock selected as PREDIV1 clock entry */
- SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
- }
-#else
- if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
- {
- /* HSI oscillator clock divided by 2 selected as PLL clock entry */
- SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
- }
- else
- {
- predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
- /* HSE oscillator clock selected as PREDIV1 clock entry */
- SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
- }
-#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
- break;
- default: /* HSI used as system clock */
- SystemCoreClock = HSI_VALUE;
- break;
- }
- /* Compute HCLK clock frequency ----------------*/
- /* Get HCLK prescaler */
- tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
- /* HCLK clock frequency */
- SystemCoreClock >>= tmp;
-}
-
-/**
- * @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)
-{
- /* 1- Try to start with HSE and external clock */
-#if USE_PLL_HSE_EXTC != 0
- if (SetSysClock_PLL_HSE(1) == 0)
-#endif
- {
- /* 2- If fail try to start with HSE and external xtal */
- #if USE_PLL_HSE_XTAL != 0
- if (SetSysClock_PLL_HSE(0) == 0)
- #endif
- {
- /* 3- If fail start with HSI clock */
- if (SetSysClock_PLL_HSI() == 0)
- {
- while(1)
- {
- // [TODO] Put something here to tell the user that a problem occured...
- }
- }
- }
- }
-
- /* 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 (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
-/******************************************************************************/
-/* 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.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
-
-/******************************************************************************/
-/* 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
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
-