diff options
Diffstat (limited to 'STM32_bootloader/Core/Src/system_stm32f1xx.c')
| -rw-r--r-- | STM32_bootloader/Core/Src/system_stm32f1xx.c | 408 |
1 files changed, 0 insertions, 408 deletions
diff --git a/STM32_bootloader/Core/Src/system_stm32f1xx.c b/STM32_bootloader/Core/Src/system_stm32f1xx.c deleted file mode 100644 index bc96aae..0000000 --- a/STM32_bootloader/Core/Src/system_stm32f1xx.c +++ /dev/null @@ -1,408 +0,0 @@ -/** - ****************************************************************************** - * @file system_stm32f1xx.c - * @author MCD Application Team - * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File. - * - * 1. This file provides two functions and one global variable to be called from - * user application: - * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier - * factors, AHB/APBx prescalers and Flash settings). - * This function is called at startup just after reset and - * before branch to main program. This call is made inside - * the "startup_stm32f1xx_xx.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_stm32f1xx_xx.s" file, to - * configure the system clock before to branch to main program. - * - * 4. The default value of HSE crystal is set to 8 MHz (or 25 MHz, depending on - * the product used), refer to "HSE_VALUE". - * When HSE is used as system clock source, directly or through PLL, and you - * are using different crystal you have to adapt the HSE value to your own - * configuration. - * - ****************************************************************************** - * @attention - * - * <h2><center>© Copyright (c) 2017 STMicroelectronics. - * All rights reserved.</center></h2> - * - * This software component is licensed by ST under BSD 3-Clause license, - * the "License"; You may not use this file except in compliance with the - * License. You may obtain a copy of the License at: - * opensource.org/licenses/BSD-3-Clause - * - ****************************************************************************** - */ - -/** @addtogroup CMSIS - * @{ - */ - -/** @addtogroup stm32f1xx_system - * @{ - */ - -/** @addtogroup STM32F1xx_System_Private_Includes - * @{ - */ - -#include "stm32f1xx.h" - -/** - * @} - */ - -/** @addtogroup STM32F1xx_System_Private_TypesDefinitions - * @{ - */ - -/** - * @} - */ - -/** @addtogroup STM32F1xx_System_Private_Defines - * @{ - */ - -#if !defined (HSE_VALUE) - #define HSE_VALUE 8000000U /*!< 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 8000000U /*!< 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 use external SRAM */ -#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG) -/* #define DATA_IN_ExtSRAM */ -#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */ - -/* Note: Following vector table addresses must be defined in line with linker - configuration. */ -/*!< Uncomment the following line if you need to relocate the vector table - anywhere in Flash or Sram, else the vector table is kept at the automatic - remap of boot address selected */ -/* #define USER_VECT_TAB_ADDRESS */ - -#if defined(USER_VECT_TAB_ADDRESS) -/*!< Uncomment the following line if you need to relocate your vector Table - in Sram else user remap will be done in Flash. */ -/* #define VECT_TAB_SRAM */ -#if defined(VECT_TAB_SRAM) -#define VECT_TAB_BASE_ADDRESS SRAM_BASE /*!< Vector Table base address field. - This value must be a multiple of 0x200. */ -#define VECT_TAB_OFFSET 0x00000000U /*!< Vector Table base offset field. - This value must be a multiple of 0x200. */ -#else -#define VECT_TAB_BASE_ADDRESS FLASH_BASE /*!< Vector Table base address field. - This value must be a multiple of 0x200. */ -#define VECT_TAB_OFFSET 0x00000000U /*!< Vector Table base offset field. - This value must be a multiple of 0x200. */ -#endif /* VECT_TAB_SRAM */ -#endif /* USER_VECT_TAB_ADDRESS */ - -/******************************************************************************/ - -/** - * @} - */ - -/** @addtogroup STM32F1xx_System_Private_Macros - * @{ - */ - -/** - * @} - */ - -/** @addtogroup STM32F1xx_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; then there - is no need to call the 2 first functions listed above, since SystemCoreClock - variable is updated automatically. - */ -uint32_t SystemCoreClock = 16000000; -const uint8_t AHBPrescTable[16U] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; -const uint8_t APBPrescTable[8U] = {0, 0, 0, 0, 1, 2, 3, 4}; - -/** - * @} - */ - -/** @addtogroup STM32F1xx_System_Private_FunctionPrototypes - * @{ - */ - -#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG) -#ifdef DATA_IN_ExtSRAM - static void SystemInit_ExtMemCtl(void); -#endif /* DATA_IN_ExtSRAM */ -#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */ - -/** - * @} - */ - -/** @addtogroup STM32F1xx_System_Private_Functions - * @{ - */ - -/** - * @brief Setup the microcontroller system - * Initialize the Embedded Flash Interface, the PLL and update the - * SystemCoreClock variable. - * @note This function should be used only after reset. - * @param None - * @retval None - */ -void SystemInit (void) -{ -#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG) - #ifdef DATA_IN_ExtSRAM - SystemInit_ExtMemCtl(); - #endif /* DATA_IN_ExtSRAM */ -#endif - - /* Configure the Vector Table location -------------------------------------*/ -#if defined(USER_VECT_TAB_ADDRESS) - SCB->VTOR = VECT_TAB_BASE_ADDRESS | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */ -#endif /* USER_VECT_TAB_ADDRESS */ -} - -/** - * @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 by the PLL factors. - * - * (*) HSI_VALUE is a constant defined in stm32f1xx.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 stm32f1xx.h file (default value - * 8 MHz or 25 MHz, depending on the product used), 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 = 0U, pllmull = 0U, pllsource = 0U; - -#if defined(STM32F105xC) || defined(STM32F107xC) - uint32_t prediv1source = 0U, prediv1factor = 0U, prediv2factor = 0U, pll2mull = 0U; -#endif /* STM32F105xC */ - -#if defined(STM32F100xB) || defined(STM32F100xE) - uint32_t prediv1factor = 0U; -#endif /* STM32F100xB or STM32F100xE */ - - /* Get SYSCLK source -------------------------------------------------------*/ - tmp = RCC->CFGR & RCC_CFGR_SWS; - - switch (tmp) - { - case 0x00U: /* HSI used as system clock */ - SystemCoreClock = HSI_VALUE; - break; - case 0x04U: /* HSE used as system clock */ - SystemCoreClock = HSE_VALUE; - break; - case 0x08U: /* PLL used as system clock */ - - /* Get PLL clock source and multiplication factor ----------------------*/ - pllmull = RCC->CFGR & RCC_CFGR_PLLMULL; - pllsource = RCC->CFGR & RCC_CFGR_PLLSRC; - -#if !defined(STM32F105xC) && !defined(STM32F107xC) - pllmull = ( pllmull >> 18U) + 2U; - - if (pllsource == 0x00U) - { - /* HSI oscillator clock divided by 2 selected as PLL clock entry */ - SystemCoreClock = (HSI_VALUE >> 1U) * pllmull; - } - else - { - #if defined(STM32F100xB) || defined(STM32F100xE) - prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1U; - /* HSE oscillator clock selected as PREDIV1 clock entry */ - SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; - #else - /* HSE selected as PLL clock entry */ - if ((RCC->CFGR & RCC_CFGR_PLLXTPRE) != (uint32_t)RESET) - {/* HSE oscillator clock divided by 2 */ - SystemCoreClock = (HSE_VALUE >> 1U) * pllmull; - } - else - { - SystemCoreClock = HSE_VALUE * pllmull; - } - #endif - } -#else - pllmull = pllmull >> 18U; - - if (pllmull != 0x0DU) - { - pllmull += 2U; - } - else - { /* PLL multiplication factor = PLL input clock * 6.5 */ - pllmull = 13U / 2U; - } - - if (pllsource == 0x00U) - { - /* HSI oscillator clock divided by 2 selected as PLL clock entry */ - SystemCoreClock = (HSI_VALUE >> 1U) * pllmull; - } - else - {/* PREDIV1 selected as PLL clock entry */ - - /* Get PREDIV1 clock source and division factor */ - prediv1source = RCC->CFGR2 & RCC_CFGR2_PREDIV1SRC; - prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1U; - - if (prediv1source == 0U) - { - /* HSE oscillator clock selected as PREDIV1 clock entry */ - SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; - } - else - {/* PLL2 clock selected as PREDIV1 clock entry */ - - /* Get PREDIV2 division factor and PLL2 multiplication factor */ - prediv2factor = ((RCC->CFGR2 & RCC_CFGR2_PREDIV2) >> 4U) + 1U; - pll2mull = ((RCC->CFGR2 & RCC_CFGR2_PLL2MUL) >> 8U) + 2U; - SystemCoreClock = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull; - } - } -#endif /* STM32F105xC */ - break; - - default: - SystemCoreClock = HSI_VALUE; - break; - } - - /* Compute HCLK clock frequency ----------------*/ - /* Get HCLK prescaler */ - tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4U)]; - /* HCLK clock frequency */ - SystemCoreClock >>= tmp; -} - -#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG) -/** - * @brief Setup the external memory controller. Called in startup_stm32f1xx.s - * before jump to __main - * @param None - * @retval None - */ -#ifdef DATA_IN_ExtSRAM -/** - * @brief Setup the external memory controller. - * Called in startup_stm32f1xx_xx.s/.c before jump to main. - * This function configures the external SRAM mounted on STM3210E-EVAL - * board (STM32 High density devices). This SRAM will be used as program - * data memory (including heap and stack). - * @param None - * @retval None - */ -void SystemInit_ExtMemCtl(void) -{ - __IO uint32_t tmpreg; - /*!< FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is - required, then adjust the Register Addresses */ - - /* Enable FSMC clock */ - RCC->AHBENR = 0x00000114U; - - /* Delay after an RCC peripheral clock enabling */ - tmpreg = READ_BIT(RCC->AHBENR, RCC_AHBENR_FSMCEN); - - /* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */ - RCC->APB2ENR = 0x000001E0U; - - /* Delay after an RCC peripheral clock enabling */ - tmpreg = READ_BIT(RCC->APB2ENR, RCC_APB2ENR_IOPDEN); - - (void)(tmpreg); - -/* --------------- SRAM Data lines, NOE and NWE configuration ---------------*/ -/*---------------- SRAM Address lines configuration -------------------------*/ -/*---------------- NOE and NWE configuration --------------------------------*/ -/*---------------- NE3 configuration ----------------------------------------*/ -/*---------------- NBL0, NBL1 configuration ---------------------------------*/ - - GPIOD->CRL = 0x44BB44BBU; - GPIOD->CRH = 0xBBBBBBBBU; - - GPIOE->CRL = 0xB44444BBU; - GPIOE->CRH = 0xBBBBBBBBU; - - GPIOF->CRL = 0x44BBBBBBU; - GPIOF->CRH = 0xBBBB4444U; - - GPIOG->CRL = 0x44BBBBBBU; - GPIOG->CRH = 0x444B4B44U; - -/*---------------- FSMC Configuration ---------------------------------------*/ -/*---------------- Enable FSMC Bank1_SRAM Bank ------------------------------*/ - - FSMC_Bank1->BTCR[4U] = 0x00001091U; - FSMC_Bank1->BTCR[5U] = 0x00110212U; -} -#endif /* DATA_IN_ExtSRAM */ -#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */ - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |