diff options
Diffstat (limited to 'Projects/P-NUCLEO-WB55.Nucleo/Applications/Phy_802_15_4/Phy_802_15_4_Cli/Core/Src/system_stm32wbxx.c')
| -rw-r--r-- | Projects/P-NUCLEO-WB55.Nucleo/Applications/Phy_802_15_4/Phy_802_15_4_Cli/Core/Src/system_stm32wbxx.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/Projects/P-NUCLEO-WB55.Nucleo/Applications/Phy_802_15_4/Phy_802_15_4_Cli/Core/Src/system_stm32wbxx.c b/Projects/P-NUCLEO-WB55.Nucleo/Applications/Phy_802_15_4/Phy_802_15_4_Cli/Core/Src/system_stm32wbxx.c new file mode 100644 index 000000000..2e42904ec --- /dev/null +++ b/Projects/P-NUCLEO-WB55.Nucleo/Applications/Phy_802_15_4/Phy_802_15_4_Cli/Core/Src/system_stm32wbxx.c @@ -0,0 +1,357 @@ +/** + ****************************************************************************** + * @file system_stm32wbxx.c + * @author MCD Application Team + * @brief CMSIS Cortex Device Peripheral Access Layer System Source File + * + * 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_stm32wbxx.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. + * + * After each device reset the MSI (4 MHz) is used as system clock source. + * Then SystemInit() function is called, in "startup_stm32wbxx.s" file, to + * configure the system clock before to branch to main program. + * + * This file configures the system clock as follows: + *============================================================================= + *----------------------------------------------------------------------------- + * System Clock source | MSI + *----------------------------------------------------------------------------- + * SYSCLK(Hz) | 4000000 + *----------------------------------------------------------------------------- + * HCLK(Hz) | 4000000 + *----------------------------------------------------------------------------- + * AHB Prescaler | 1 + *----------------------------------------------------------------------------- + * APB1 Prescaler | 1 + *----------------------------------------------------------------------------- + * APB2 Prescaler | 1 + *----------------------------------------------------------------------------- + * PLL_M | 1 + *----------------------------------------------------------------------------- + * PLL_N | 8 + *----------------------------------------------------------------------------- + * PLL_P | 7 + *----------------------------------------------------------------------------- + * PLL_Q | 2 + *----------------------------------------------------------------------------- + * PLL_R | 2 + *----------------------------------------------------------------------------- + * PLLSAI1_P | NA + *----------------------------------------------------------------------------- + * PLLSAI1_Q | NA + *----------------------------------------------------------------------------- + * PLLSAI1_R | NA + *----------------------------------------------------------------------------- + * Require 48MHz for USB OTG FS, | Disabled + * SDIO and RNG clock | + *----------------------------------------------------------------------------- + *============================================================================= + ****************************************************************************** + * @attention + * + * <h2><center>© Copyright (c) 2019 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 stm32WBxx_system + * @{ + */ + +/** @addtogroup stm32WBxx_System_Private_Includes + * @{ + */ + +#include "stm32wbxx.h" + +#if !defined (HSE_VALUE) + #define HSE_VALUE (32000000UL) /*!< Value of the External oscillator in Hz */ +#endif /* HSE_VALUE */ + +#if !defined (MSI_VALUE) + #define MSI_VALUE (4000000UL) /*!< Value of the Internal oscillator in Hz*/ +#endif /* MSI_VALUE */ + +#if !defined (HSI_VALUE) + #define HSI_VALUE (16000000UL) /*!< Value of the Internal oscillator in Hz*/ +#endif /* HSI_VALUE */ + +#if !defined (LSI_VALUE) + #define LSI_VALUE (32000UL) /*!< Value of LSI in Hz*/ +#endif /* LSI_VALUE */ + +#if !defined (LSE_VALUE) + #define LSE_VALUE (32768UL) /*!< Value of LSE in Hz*/ +#endif /* LSE_VALUE */ + +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_Defines + * @{ + */ + +/*!< Uncomment the following line if you need to relocate your vector Table in + Internal SRAM. */ +/* #define VECT_TAB_SRAM */ +#define VECT_TAB_OFFSET 0x0U /*!< Vector Table base offset field. + This value must be a multiple of 0x200. */ + +#define VECT_TAB_BASE_ADDRESS SRAM1_BASE /*!< Vector Table base offset field. + This value must be a multiple of 0x200. */ +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_Variables + * @{ + */ + /* The SystemCoreClock 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 = 4000000UL ; /*CPU1: M4 on MSI clock after startup (4MHz)*/ + + const uint32_t AHBPrescTable[16UL] = {1UL, 3UL, 5UL, 1UL, 1UL, 6UL, 10UL, 32UL, 2UL, 4UL, 8UL, 16UL, 64UL, 128UL, 256UL, 512UL}; + + const uint32_t APBPrescTable[8UL] = {0UL, 0UL, 0UL, 0UL, 1UL, 2UL, 3UL, 4UL}; + + const uint32_t MSIRangeTable[16UL] = {100000UL, 200000UL, 400000UL, 800000UL, 1000000UL, 2000000UL, \ + 4000000UL, 8000000UL, 16000000UL, 24000000UL, 32000000UL, 48000000UL, 0UL, 0UL, 0UL, 0UL}; /* 0UL values are incorrect cases */ + +#if defined(STM32WB55xx) || defined(STM32WB35xx) + const uint32_t SmpsPrescalerTable[4UL][6UL]={{1UL,3UL,2UL,2UL,1UL,2UL}, \ + {2UL,6UL,4UL,3UL,2UL,4UL}, \ + {4UL,12UL,8UL,6UL,4UL,8UL}, \ + {4UL,12UL,8UL,6UL,4UL,8UL}}; +#endif + +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_FunctionPrototypes + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32WBxx_System_Private_Functions + * @{ + */ + +/** + * @brief Setup the microcontroller system. + * @param None + * @retval None + */ +void SystemInit(void) +{ + /* Configure the Vector Table location add offset address ------------------*/ +#if defined(VECT_TAB_SRAM) && defined(VECT_TAB_BASE_ADDRESS) + /* program in SRAMx */ + SCB->VTOR = VECT_TAB_BASE_ADDRESS | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAMx for CPU1 */ +#else /* program in FLASH */ + SCB->VTOR = VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ +#endif + + /* FPU settings ------------------------------------------------------------*/ + #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) + SCB->CPACR |= ((3UL << (10UL*2UL))|(3UL << (11UL*2UL))); /* set CP10 and CP11 Full Access */ + #endif + + /* Reset the RCC clock configuration to the default reset state ------------*/ + /* Set MSION bit */ + RCC->CR |= RCC_CR_MSION; + + /* Reset CFGR register */ + RCC->CFGR = 0x00070000U; + + /* Reset PLLSAI1ON, PLLON, HSECSSON, HSEON, HSION, and MSIPLLON bits */ + RCC->CR &= (uint32_t)0xFAF6FEFBU; + + /*!< Reset LSI1 and LSI2 bits */ + RCC->CSR &= (uint32_t)0xFFFFFFFAU; + + /*!< Reset HSI48ON bit */ + RCC->CRRCR &= (uint32_t)0xFFFFFFFEU; + + /* Reset PLLCFGR register */ + RCC->PLLCFGR = 0x22041000U; + +#if defined(STM32WB55xx) + /* Reset PLLSAI1CFGR register */ + RCC->PLLSAI1CFGR = 0x22041000U; +#endif + + /* Reset HSEBYP bit */ + RCC->CR &= 0xFFFBFFFFU; + + /* Disable all interrupts */ + RCC->CIER = 0x00000000; +} + +/** + * @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 MSI, SystemCoreClock will contain the MSI_VALUE(*) + * + * - 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(*) or MSI_VALUE(*) multiplied/divided by the PLL factors. + * + * (*) MSI_VALUE is a constant defined in stm32wbxx_hal.h file (default value + * 4 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * + * (**) HSI_VALUE is a constant defined in stm32wbxx_hal_conf.h file (default value + * 16 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * + * (***) HSE_VALUE is a constant defined in stm32wbxx_hal_conf.h file (default value + * 32 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, msirange, pllvco, pllr, pllsource , pllm; + + /* Get MSI Range frequency--------------------------------------------------*/ + + /*MSI frequency range in Hz*/ + msirange = MSIRangeTable[(RCC->CR & RCC_CR_MSIRANGE) >> RCC_CR_MSIRANGE_Pos]; + + /* Get SYSCLK source -------------------------------------------------------*/ + switch (RCC->CFGR & RCC_CFGR_SWS) + { + case 0x00: /* MSI used as system clock source */ + SystemCoreClock = msirange; + break; + + case 0x04: /* HSI used as system clock source */ + /* HSI used as system clock source */ + SystemCoreClock = HSI_VALUE; + break; + + case 0x08: /* HSE used as system clock source */ + SystemCoreClock = HSE_VALUE; + break; + + case 0x0C: /* PLL used as system clock source */ + /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE/ PLLM) * PLLN + SYSCLK = PLL_VCO / PLLR + */ + pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC); + pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> RCC_PLLCFGR_PLLM_Pos) + 1UL ; + + if(pllsource == 0x02UL) /* HSI used as PLL clock source */ + { + pllvco = (HSI_VALUE / pllm); + } + else if(pllsource == 0x03UL) /* HSE used as PLL clock source */ + { + pllvco = (HSE_VALUE / pllm); + } + else /* MSI used as PLL clock source */ + { + pllvco = (msirange / pllm); + } + + pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> RCC_PLLCFGR_PLLN_Pos); + pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> RCC_PLLCFGR_PLLR_Pos) + 1UL); + + SystemCoreClock = pllvco/pllr; + break; + + default: + SystemCoreClock = msirange; + break; + } + + /* Compute HCLK clock frequency --------------------------------------------*/ + /* Get HCLK1 prescaler */ + tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos)]; + /* HCLK clock frequency */ + SystemCoreClock = SystemCoreClock / tmp; + +} + + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |