311 lines
10 KiB
C
311 lines
10 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* Taken from ST Cube library and modified. See below for original header.
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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******************************************************************************
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* @file system_stm32.c
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* @author MCD Application Team
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* @version V1.0.1
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* @date 26-February-2014
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* @brief CMSIS Cortex-M4/M7 Device Peripheral Access Layer System Source File.
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*
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* This file provides two functions and one global variable to be called from
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* user application:
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* - SystemInit(): This function is called at startup just after reset and
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* before branch to main program. This call is made inside
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* the "startup_stm32.s" file.
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*
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* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
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* by the user application to setup the SysTick
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* timer or configure other parameters.
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*
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/** @addtogroup CMSIS
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* @{
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*/
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/** @addtogroup stm32fxxx_system
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* @{
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*/
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/** @addtogroup STM32Fxxx_System_Private_Includes
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* @{
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*/
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#include "mpconfigboard.h"
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#include STM32_HAL_H
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void __fatal_error(const char *msg);
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_Defines
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* @{
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*/
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/************************* Miscellaneous Configuration ************************/
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/*!< Uncomment the following line if you need to relocate your vector Table in
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Internal SRAM. */
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/* #define VECT_TAB_SRAM */
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#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
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This value must be a multiple of 0x200. */
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/******************************************************************************/
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_Variables
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* @{
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*/
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/* This variable is updated in three ways:
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1) by calling CMSIS function SystemCoreClockUpdate()
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2) by calling HAL API function HAL_RCC_GetHCLKFreq()
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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Note: If you use this function to configure the system clock; then there
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is no need to call the 2 first functions listed above, since SystemCoreClock
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variable is updated automatically.
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*/
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uint32_t SystemCoreClock = 16000000;
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_FunctionPrototypes
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32Fxxx_System_Private_Functions
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* @{
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*/
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/**
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* @brief Setup the microcontroller system
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* Initialize the FPU setting, vector table location and External memory
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* configuration.
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* @param None
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* @retval None
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*/
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void SystemInit(void)
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{
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/* FPU settings ------------------------------------------------------------*/
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#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
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SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
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#endif
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/* Reset the RCC clock configuration to the default reset state ------------*/
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/* Set HSION bit */
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RCC->CR |= (uint32_t)0x00000001;
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/* Reset CFGR register */
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RCC->CFGR = 0x00000000;
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/* Reset HSEON, CSSON and PLLON bits */
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RCC->CR &= (uint32_t)0xFEF6FFFF;
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/* Reset PLLCFGR register */
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RCC->PLLCFGR = 0x24003010;
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/* Reset HSEBYP bit */
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RCC->CR &= (uint32_t)0xFFFBFFFF;
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/* Disable all interrupts */
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RCC->CIR = 0x00000000;
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/* Configure the Vector Table location add offset address ------------------*/
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#ifdef VECT_TAB_SRAM
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SCB->VTOR = SRAM1_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
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#else
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SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
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#endif
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/* dpgeorge: enable 8-byte stack alignment for IRQ handlers, in accord with EABI */
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SCB->CCR |= SCB_CCR_STKALIGN_Msk;
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 168000000
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* HCLK(Hz) = 168000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = HSE_VALUE
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* PLL_M = HSE_VALUE/1000000
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* PLL_N = 336
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* PLL_P = 2
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* PLL_Q = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*
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* PLL is configured as follows:
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*
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* VCO_IN = HSE / M
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* VCO_OUT = HSE / M * N
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* PLLCLK = HSE / M * N / P
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* PLL48CK = HSE / M * N / Q
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*
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* SYSCLK = PLLCLK
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* HCLK = SYSCLK / AHB_PRESC
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* PCLKx = HCLK / APBx_PRESC
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*
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* Constraints on parameters:
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*
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* VCO_IN between 1MHz and 2MHz (2MHz recommended)
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* VCO_OUT between 192MHz and 432MHz
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* HSE = 8MHz
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* M = 2 .. 63 (inclusive)
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* N = 192 ... 432 (inclusive)
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* P = 2, 4, 6, 8
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* Q = 2 .. 15 (inclusive)
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*
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* AHB_PRESC=1,2,4,8,16,64,128,256,512
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* APBx_PRESC=1,2,4,8,16
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*
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* Output clocks:
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*
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* CPU SYSCLK max 168MHz
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* USB,RNG,SDIO PLL48CK must be 48MHz for USB
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* AHB HCLK max 168MHz
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* APB1 PCLK1 max 42MHz
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* APB2 PCLK2 max 84MHz
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*
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* Timers run from APBx if APBx_PRESC=1, else 2x APBx
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable Power Control clock */
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__PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = MICROPY_HW_CLK_PLLM;
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RCC_OscInitStruct.PLL.PLLN = MICROPY_HW_CLK_PLLN;
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RCC_OscInitStruct.PLL.PLLP = MICROPY_HW_CLK_PLLP;
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RCC_OscInitStruct.PLL.PLLQ = MICROPY_HW_CLK_PLLQ;
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if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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__fatal_error("HAL_RCC_OscConfig");
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}
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#if defined(STM32F7)
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/* Activate the OverDrive to reach the 200 MHz Frequency */
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if (HAL_PWREx_EnableOverDrive() != HAL_OK)
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{
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__fatal_error("HAL_PWREx_EnableOverDrive");
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}
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#endif
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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#if !defined(MICROPY_HW_FLASH_LATENCY)
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#define MICROPY_HW_FLASH_LATENCY FLASH_LATENCY_5
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#endif
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, MICROPY_HW_FLASH_LATENCY) != HAL_OK)
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{
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__fatal_error("HAL_RCC_ClockConfig");
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}
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}
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