X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=FreeRTOS%2FDemo%2FCORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube%2FST_Code%2FDrivers%2FSTM32L4xx_HAL_Driver%2FSrc%2Fstm32l4xx_hal_rcc.c;fp=FreeRTOS%2FDemo%2FCORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube%2FST_Code%2FDrivers%2FSTM32L4xx_HAL_Driver%2FSrc%2Fstm32l4xx_hal_rcc.c;h=9709d067911fe5c470f35af5842ec2430f974f4e;hb=5ddf42f6be59f6e3097536239b834cbfe1ef9ecf;hp=0000000000000000000000000000000000000000;hpb=dd36818d73235d32d6fdcec146356c71587ad773;p=freertos diff --git a/FreeRTOS/Demo/CORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube/ST_Code/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c b/FreeRTOS/Demo/CORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube/ST_Code/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c new file mode 100644 index 000000000..9709d0679 --- /dev/null +++ b/FreeRTOS/Demo/CORTEX_MPU_STM32L4_Discovery_Keil_STM32Cube/ST_Code/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c @@ -0,0 +1,1869 @@ +/** + ****************************************************************************** + * @file stm32l4xx_hal_rcc.c + * @author MCD Application Team + * @brief RCC HAL module driver. + * This file provides firmware functions to manage the following + * functionalities of the Reset and Clock Control (RCC) peripheral: + * + Initialization and de-initialization functions + * + Peripheral Control functions + * + @verbatim + ============================================================================== + ##### RCC specific features ##### + ============================================================================== + [..] + After reset the device is running from Multiple Speed Internal oscillator + (4 MHz) with Flash 0 wait state. Flash prefetch buffer, D-Cache + and I-Cache are disabled, and all peripherals are off except internal + SRAM, Flash and JTAG. + + (+) There is no prescaler on High speed (AHBs) and Low speed (APBs) busses: + all peripherals mapped on these busses are running at MSI speed. + (+) The clock for all peripherals is switched off, except the SRAM and FLASH. + (+) All GPIOs are in analog mode, except the JTAG pins which + are assigned to be used for debug purpose. + + [..] + Once the device started from reset, the user application has to: + (+) Configure the clock source to be used to drive the System clock + (if the application needs higher frequency/performance) + (+) Configure the System clock frequency and Flash settings + (+) Configure the AHB and APB busses prescalers + (+) Enable the clock for the peripheral(s) to be used + (+) Configure the clock source(s) for peripherals which clocks are not + derived from the System clock (SAIx, RTC, ADC, USB OTG FS/SDMMC1/RNG) + + @endverbatim + ****************************************************************************** + * @attention + * + *

© Copyright (c) 2017 STMicroelectronics. + * All rights reserved.

+ * + * 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 + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l4xx_hal.h" + +/** @addtogroup STM32L4xx_HAL_Driver + * @{ + */ + +/** @defgroup RCC RCC + * @brief RCC HAL module driver + * @{ + */ + +#ifdef HAL_RCC_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/** @defgroup RCC_Private_Constants RCC Private Constants + * @{ + */ +#define HSE_TIMEOUT_VALUE HSE_STARTUP_TIMEOUT +#define HSI_TIMEOUT_VALUE 2U /* 2 ms (minimum Tick + 1) */ +#define MSI_TIMEOUT_VALUE 2U /* 2 ms (minimum Tick + 1) */ +#if defined(RCC_CSR_LSIPREDIV) +#define LSI_TIMEOUT_VALUE 17U /* 17 ms (16 ms starting time + 1) */ +#else +#define LSI_TIMEOUT_VALUE 2U /* 2 ms (minimum Tick + 1) */ +#endif /* RCC_CSR_LSIPREDIV */ +#define HSI48_TIMEOUT_VALUE 2U /* 2 ms (minimum Tick + 1) */ +#define PLL_TIMEOUT_VALUE 2U /* 2 ms (minimum Tick + 1) */ +#define CLOCKSWITCH_TIMEOUT_VALUE 5000U /* 5 s */ +/** + * @} + */ + +/* Private macro -------------------------------------------------------------*/ +/** @defgroup RCC_Private_Macros RCC Private Macros + * @{ + */ +#define __MCO1_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE() +#define MCO1_GPIO_PORT GPIOA +#define MCO1_PIN GPIO_PIN_8 + +#define RCC_PLL_OSCSOURCE_CONFIG(__HAL_RCC_PLLSOURCE__) \ + (MODIFY_REG(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC, (__HAL_RCC_PLLSOURCE__))) +/** + * @} + */ + +/* Private variables ---------------------------------------------------------*/ + +/* Private function prototypes -----------------------------------------------*/ +/** @defgroup RCC_Private_Functions RCC Private Functions + * @{ + */ +static HAL_StatusTypeDef RCC_SetFlashLatencyFromMSIRange(uint32_t msirange); +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) +static uint32_t RCC_GetSysClockFreqFromPLLSource(void); +#endif +/** + * @} + */ + +/* Exported functions --------------------------------------------------------*/ + +/** @defgroup RCC_Exported_Functions RCC Exported Functions + * @{ + */ + +/** @defgroup RCC_Exported_Functions_Group1 Initialization and de-initialization functions + * @brief Initialization and Configuration functions + * + @verbatim + =============================================================================== + ##### Initialization and de-initialization functions ##### + =============================================================================== + [..] + This section provides functions allowing to configure the internal and external oscillators + (HSE, HSI, LSE, MSI, LSI, PLL, CSS and MCO) and the System busses clocks (SYSCLK, AHB, APB1 + and APB2). + + [..] Internal/external clock and PLL configuration + (+) HSI (high-speed internal): 16 MHz factory-trimmed RC used directly or through + the PLL as System clock source. + + (+) MSI (Mutiple Speed Internal): Its frequency is software trimmable from 100KHZ to 48MHZ. + It can be used to generate the clock for the USB OTG FS (48 MHz). + The number of flash wait states is automatically adjusted when MSI range is updated with + HAL_RCC_OscConfig() and the MSI is used as System clock source. + + (+) LSI (low-speed internal): 32 KHz low consumption RC used as IWDG and/or RTC + clock source. + + (+) HSE (high-speed external): 4 to 48 MHz crystal oscillator used directly or + through the PLL as System clock source. Can be used also optionally as RTC clock source. + + (+) LSE (low-speed external): 32.768 KHz oscillator used optionally as RTC clock source. + + (+) PLL (clocked by HSI, HSE or MSI) providing up to three independent output clocks: + (++) The first output is used to generate the high speed system clock (up to 80MHz). + (++) The second output is used to generate the clock for the USB OTG FS (48 MHz), + the random analog generator (<=48 MHz) and the SDMMC1 (<= 48 MHz). + (++) The third output is used to generate an accurate clock to achieve + high-quality audio performance on SAI interface. + + (+) PLLSAI1 (clocked by HSI, HSE or MSI) providing up to three independent output clocks: + (++) The first output is used to generate SAR ADC1 clock. + (++) The second output is used to generate the clock for the USB OTG FS (48 MHz), + the random analog generator (<=48 MHz) and the SDMMC1 (<= 48 MHz). + (++) The Third output is used to generate an accurate clock to achieve + high-quality audio performance on SAI interface. + + (+) PLLSAI2 (clocked by HSI, HSE or MSI) providing up to two independent output clocks: + (++) The first output is used to generate SAR ADC2 clock. + (++) The second output is used to generate an accurate clock to achieve + high-quality audio performance on SAI interface. + + (+) CSS (Clock security system): once enabled, if a HSE clock failure occurs + (HSE used directly or through PLL as System clock source), the System clock + is automatically switched to HSI and an interrupt is generated if enabled. + The interrupt is linked to the Cortex-M4 NMI (Non-Maskable Interrupt) + exception vector. + + (+) MCO (microcontroller clock output): used to output MSI, LSI, HSI, LSE, HSE or + main PLL clock (through a configurable prescaler) on PA8 pin. + + [..] System, AHB and APB busses clocks configuration + (+) Several clock sources can be used to drive the System clock (SYSCLK): MSI, HSI, + HSE and main PLL. + The AHB clock (HCLK) is derived from System clock through configurable + prescaler and used to clock the CPU, memory and peripherals mapped + on AHB bus (DMA, GPIO...). APB1 (PCLK1) and APB2 (PCLK2) clocks are derived + from AHB clock through configurable prescalers and used to clock + the peripherals mapped on these busses. You can use + "HAL_RCC_GetSysClockFreq()" function to retrieve the frequencies of these clocks. + + -@- All the peripheral clocks are derived from the System clock (SYSCLK) except: + + (+@) SAI: the SAI clock can be derived either from a specific PLL (PLLSAI1) or (PLLSAI2) or + from an external clock mapped on the SAI_CKIN pin. + You have to use HAL_RCCEx_PeriphCLKConfig() function to configure this clock. + (+@) RTC: the RTC clock can be derived either from the LSI, LSE or HSE clock + divided by 2 to 31. + You have to use __HAL_RCC_RTC_ENABLE() and HAL_RCCEx_PeriphCLKConfig() function + to configure this clock. + (+@) USB OTG FS, SDMMC1 and RNG: USB OTG FS requires a frequency equal to 48 MHz + to work correctly, while the SDMMC1 and RNG peripherals require a frequency + equal or lower than to 48 MHz. This clock is derived of the main PLL or PLLSAI1 + through PLLQ divider. You have to enable the peripheral clock and use + HAL_RCCEx_PeriphCLKConfig() function to configure this clock. + (+@) IWDG clock which is always the LSI clock. + + + (+) The maximum frequency of the SYSCLK, HCLK, PCLK1 and PCLK2 is 80 MHz. + The clock source frequency should be adapted depending on the device voltage range + as listed in the Reference Manual "Clock source frequency versus voltage scaling" chapter. + + @endverbatim + + Table 1. HCLK clock frequency for STM32L4Rx/STM32L4Sx devices + +--------------------------------------------------------+ + | Latency | HCLK clock frequency (MHz) | + | |--------------------------------------| + | | voltage range 1 | voltage range 2 | + | | 1.2 V | 1.0 V | + |-----------------|-------------------|------------------| + |0WS(1 CPU cycles)| 0 < HCLK <= 20 | 0 < HCLK <= 8 | + |-----------------|-------------------|------------------| + |1WS(2 CPU cycles)| 20 < HCLK <= 40 | 8 < HCLK <= 16 | + |-----------------|-------------------|------------------| + |2WS(3 CPU cycles)| 40 < HCLK <= 60 | 16 < HCLK <= 26 | + |-----------------|-------------------|------------------| + |3WS(4 CPU cycles)| 60 < HCLK <= 80 | 16 < HCLK <= 26 | + |-----------------|-------------------|------------------| + |4WS(5 CPU cycles)| 80 < HCLK <= 100 | 16 < HCLK <= 26 | + |-----------------|-------------------|------------------| + |5WS(6 CPU cycles)| 100 < HCLK <= 120 | 16 < HCLK <= 26 | + +--------------------------------------------------------+ + + Table 2. HCLK clock frequency for other STM32L4 devices + +-------------------------------------------------------+ + | Latency | HCLK clock frequency (MHz) | + | |-------------------------------------| + | | voltage range 1 | voltage range 2 | + | | 1.2 V | 1.0 V | + |-----------------|------------------|------------------| + |0WS(1 CPU cycles)| 0 < HCLK <= 16 | 0 < HCLK <= 6 | + |-----------------|------------------|------------------| + |1WS(2 CPU cycles)| 16 < HCLK <= 32 | 6 < HCLK <= 12 | + |-----------------|------------------|------------------| + |2WS(3 CPU cycles)| 32 < HCLK <= 48 | 12 < HCLK <= 18 | + |-----------------|------------------|------------------| + |3WS(4 CPU cycles)| 48 < HCLK <= 64 | 18 < HCLK <= 26 | + |-----------------|------------------|------------------| + |4WS(5 CPU cycles)| 64 < HCLK <= 80 | 18 < HCLK <= 26 | + +-------------------------------------------------------+ + * @{ + */ + +/** + * @brief Reset the RCC clock configuration to the default reset state. + * @note The default reset state of the clock configuration is given below: + * - MSI ON and used as system clock source + * - HSE, HSI, PLL, PLLSAI1 and PLLSAI2 OFF + * - AHB, APB1 and APB2 prescalers set to 1. + * - CSS, MCO1 OFF + * - All interrupts disabled + * - All interrupt and reset flags cleared + * @note This function does not modify the configuration of the + * - Peripheral clock sources + * - LSI, LSE and RTC clocks (Backup domain) + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RCC_DeInit(void) +{ + uint32_t tickstart; + + /* Reset to default System clock */ + /* Set MSION bit */ + SET_BIT(RCC->CR, RCC_CR_MSION); + + /* Insure MSIRDY bit is set before writing default MSIRANGE value */ + /* Get start tick */ + tickstart = HAL_GetTick(); + + /* Wait till MSI is ready */ + while(READ_BIT(RCC->CR, RCC_CR_MSIRDY) == 0U) + { + if((HAL_GetTick() - tickstart) > MSI_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Set MSIRANGE default value */ + MODIFY_REG(RCC->CR, RCC_CR_MSIRANGE, RCC_MSIRANGE_6); + + /* Reset CFGR register (MSI is selected as system clock source) */ + CLEAR_REG(RCC->CFGR); + + /* Update the SystemCoreClock global variable for MSI as system clock source */ + SystemCoreClock = MSI_VALUE; + + /* Configure the source of time base considering new system clock settings */ + if(HAL_InitTick(uwTickPrio) != HAL_OK) + { + return HAL_ERROR; + } + + /* Insure MSI selected as system clock source */ + /* Get start tick */ + tickstart = HAL_GetTick(); + + /* Wait till system clock source is ready */ + while(READ_BIT(RCC->CFGR, RCC_CFGR_SWS) != RCC_CFGR_SWS_MSI) + { + if((HAL_GetTick() - tickstart) > CLOCKSWITCH_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Reset HSION, HSIKERON, HSIASFS, HSEON, HSECSSON, PLLON, PLLSAIxON bits */ +#if defined(RCC_PLLSAI2_SUPPORT) + + CLEAR_BIT(RCC->CR, RCC_CR_HSEON | RCC_CR_HSION | RCC_CR_HSIKERON| RCC_CR_HSIASFS | RCC_CR_PLLON | RCC_CR_PLLSAI1ON | RCC_CR_PLLSAI2ON); + +#elif defined(RCC_PLLSAI1_SUPPORT) + + CLEAR_BIT(RCC->CR, RCC_CR_HSEON | RCC_CR_HSION | RCC_CR_HSIKERON| RCC_CR_HSIASFS | RCC_CR_PLLON | RCC_CR_PLLSAI1ON); + +#else + + CLEAR_BIT(RCC->CR, RCC_CR_HSEON | RCC_CR_HSION | RCC_CR_HSIKERON| RCC_CR_HSIASFS | RCC_CR_PLLON); + +#endif /* RCC_PLLSAI2_SUPPORT */ + + /* Insure PLLRDY, PLLSAI1RDY and PLLSAI2RDY (if present) are reset */ + /* Get start tick */ + tickstart = HAL_GetTick(); + +#if defined(RCC_PLLSAI2_SUPPORT) + + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY | RCC_CR_PLLSAI1RDY | RCC_CR_PLLSAI2RDY) != 0U) + +#elif defined(RCC_PLLSAI1_SUPPORT) + + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY | RCC_CR_PLLSAI1RDY) != 0U) + +#else + + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY) != 0U) + +#endif + { + if((HAL_GetTick() - tickstart) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Reset PLLCFGR register */ + CLEAR_REG(RCC->PLLCFGR); + SET_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLN_4 ); + +#if defined(RCC_PLLSAI1_SUPPORT) + + /* Reset PLLSAI1CFGR register */ + CLEAR_REG(RCC->PLLSAI1CFGR); + SET_BIT(RCC->PLLSAI1CFGR, RCC_PLLSAI1CFGR_PLLSAI1N_4 ); + +#endif /* RCC_PLLSAI1_SUPPORT */ + +#if defined(RCC_PLLSAI2_SUPPORT) + + /* Reset PLLSAI2CFGR register */ + CLEAR_REG(RCC->PLLSAI2CFGR); + SET_BIT(RCC->PLLSAI2CFGR, RCC_PLLSAI2CFGR_PLLSAI2N_4 ); + +#endif /* RCC_PLLSAI2_SUPPORT */ + + /* Reset HSEBYP bit */ + CLEAR_BIT(RCC->CR, RCC_CR_HSEBYP); + + /* Disable all interrupts */ + CLEAR_REG(RCC->CIER); + + /* Clear all interrupt flags */ + WRITE_REG(RCC->CICR, 0xFFFFFFFFU); + + /* Clear all reset flags */ + SET_BIT(RCC->CSR, RCC_CSR_RMVF); + + return HAL_OK; +} + +/** + * @brief Initialize the RCC Oscillators according to the specified parameters in the + * RCC_OscInitTypeDef. + * @param RCC_OscInitStruct pointer to an RCC_OscInitTypeDef structure that + * contains the configuration information for the RCC Oscillators. + * @note The PLL is not disabled when used as system clock. + * @note Transitions LSE Bypass to LSE On and LSE On to LSE Bypass are not + * supported by this macro. User should request a transition to LSE Off + * first and then LSE On or LSE Bypass. + * @note Transition HSE Bypass to HSE On and HSE On to HSE Bypass are not + * supported by this macro. User should request a transition to HSE Off + * first and then HSE On or HSE Bypass. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RCC_OscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct) +{ + uint32_t tickstart; + HAL_StatusTypeDef status; + uint32_t sysclk_source, pll_config; + + /* Check Null pointer */ + if(RCC_OscInitStruct == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_RCC_OSCILLATORTYPE(RCC_OscInitStruct->OscillatorType)); + + sysclk_source = __HAL_RCC_GET_SYSCLK_SOURCE(); + pll_config = __HAL_RCC_GET_PLL_OSCSOURCE(); + + /*----------------------------- MSI Configuration --------------------------*/ + if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_MSI) == RCC_OSCILLATORTYPE_MSI) + { + /* Check the parameters */ + assert_param(IS_RCC_MSI(RCC_OscInitStruct->MSIState)); + assert_param(IS_RCC_MSICALIBRATION_VALUE(RCC_OscInitStruct->MSICalibrationValue)); + assert_param(IS_RCC_MSI_CLOCK_RANGE(RCC_OscInitStruct->MSIClockRange)); + + /* Check if MSI is used as system clock or as PLL source when PLL is selected as system clock */ + if((sysclk_source == RCC_CFGR_SWS_MSI) || + ((sysclk_source == RCC_CFGR_SWS_PLL) && (pll_config == RCC_PLLSOURCE_MSI))) + { + if((READ_BIT(RCC->CR, RCC_CR_MSIRDY) != 0U) && (RCC_OscInitStruct->MSIState == RCC_MSI_OFF)) + { + return HAL_ERROR; + } + + /* Otherwise, just the calibration and MSI range change are allowed */ + else + { + /* To correctly read data from FLASH memory, the number of wait states (LATENCY) + must be correctly programmed according to the frequency of the CPU clock + (HCLK) and the supply voltage of the device. */ + if(RCC_OscInitStruct->MSIClockRange > __HAL_RCC_GET_MSI_RANGE()) + { + /* First increase number of wait states update if necessary */ + if(RCC_SetFlashLatencyFromMSIRange(RCC_OscInitStruct->MSIClockRange) != HAL_OK) + { + return HAL_ERROR; + } + + /* Selects the Multiple Speed oscillator (MSI) clock range .*/ + __HAL_RCC_MSI_RANGE_CONFIG(RCC_OscInitStruct->MSIClockRange); + /* Adjusts the Multiple Speed oscillator (MSI) calibration value.*/ + __HAL_RCC_MSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->MSICalibrationValue); + } + else + { + /* Else, keep current flash latency while decreasing applies */ + /* Selects the Multiple Speed oscillator (MSI) clock range .*/ + __HAL_RCC_MSI_RANGE_CONFIG(RCC_OscInitStruct->MSIClockRange); + /* Adjusts the Multiple Speed oscillator (MSI) calibration value.*/ + __HAL_RCC_MSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->MSICalibrationValue); + + /* Decrease number of wait states update if necessary */ + if(RCC_SetFlashLatencyFromMSIRange(RCC_OscInitStruct->MSIClockRange) != HAL_OK) + { + return HAL_ERROR; + } + } + + /* Update the SystemCoreClock global variable */ + SystemCoreClock = HAL_RCC_GetSysClockFreq() >> (AHBPrescTable[READ_BIT(RCC->CFGR, RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos] & 0x1FU); + + /* Configure the source of time base considering new system clocks settings*/ + status = HAL_InitTick(uwTickPrio); + if(status != HAL_OK) + { + return status; + } + } + } + else + { + /* Check the MSI State */ + if(RCC_OscInitStruct->MSIState != RCC_MSI_OFF) + { + /* Enable the Internal High Speed oscillator (MSI). */ + __HAL_RCC_MSI_ENABLE(); + + /* Get timeout */ + tickstart = HAL_GetTick(); + + /* Wait till MSI is ready */ + while(READ_BIT(RCC->CR, RCC_CR_MSIRDY) == 0U) + { + if((HAL_GetTick() - tickstart) > MSI_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + /* Selects the Multiple Speed oscillator (MSI) clock range .*/ + __HAL_RCC_MSI_RANGE_CONFIG(RCC_OscInitStruct->MSIClockRange); + /* Adjusts the Multiple Speed oscillator (MSI) calibration value.*/ + __HAL_RCC_MSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->MSICalibrationValue); + + } + else + { + /* Disable the Internal High Speed oscillator (MSI). */ + __HAL_RCC_MSI_DISABLE(); + + /* Get timeout */ + tickstart = HAL_GetTick(); + + /* Wait till MSI is ready */ + while(READ_BIT(RCC->CR, RCC_CR_MSIRDY) != 0U) + { + if((HAL_GetTick() - tickstart) > MSI_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + } + } + /*------------------------------- 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((sysclk_source == RCC_CFGR_SWS_HSE) || + ((sysclk_source == RCC_CFGR_SWS_PLL) && (pll_config == RCC_PLLSOURCE_HSE))) + { + if((READ_BIT(RCC->CR, RCC_CR_HSERDY) != 0U) && (RCC_OscInitStruct->HSEState == RCC_HSE_OFF)) + { + return HAL_ERROR; + } + } + else + { + /* Set the new HSE configuration ---------------------------------------*/ + __HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState); + + /* Check the HSE State */ + if(RCC_OscInitStruct->HSEState != RCC_HSE_OFF) + { + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till HSE is ready */ + while(READ_BIT(RCC->CR, RCC_CR_HSERDY) == 0U) + { + if((HAL_GetTick() - tickstart) > HSE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + else + { + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till HSE is disabled */ + while(READ_BIT(RCC->CR, RCC_CR_HSERDY) != 0U) + { + 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_HSI_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((sysclk_source == RCC_CFGR_SWS_HSI) || + ((sysclk_source == RCC_CFGR_SWS_PLL) && (pll_config == RCC_PLLSOURCE_HSI))) + { + /* When HSI is used as system clock it will not be disabled */ + if((READ_BIT(RCC->CR, RCC_CR_HSIRDY) != 0U) && (RCC_OscInitStruct->HSIState == RCC_HSI_OFF)) + { + 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(READ_BIT(RCC->CR, RCC_CR_HSIRDY) == 0U) + { + 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(READ_BIT(RCC->CR, RCC_CR_HSIRDY) != 0U) + { + 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) + { +#if defined(RCC_CSR_LSIPREDIV) + uint32_t csr_temp = RCC->CSR; + + /* Check LSI division factor */ + assert_param(IS_RCC_LSIDIV(RCC_OscInitStruct->LSIDiv)); + + if (RCC_OscInitStruct->LSIDiv != (csr_temp & RCC_CSR_LSIPREDIV)) + { + if (((csr_temp & RCC_CSR_LSIRDY) == RCC_CSR_LSIRDY) && \ + ((csr_temp & RCC_CSR_LSION) != RCC_CSR_LSION)) + { + /* If LSIRDY is set while LSION is not enabled, + LSIPREDIV can't be updated */ + return HAL_ERROR; + } + + /* Turn off LSI before changing RCC_CSR_LSIPREDIV */ + if ((csr_temp & RCC_CSR_LSION) == RCC_CSR_LSION) + { + __HAL_RCC_LSI_DISABLE(); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till LSI is disabled */ + while(READ_BIT(RCC->CSR, RCC_CSR_LSIRDY) != 0U) + { + if((HAL_GetTick() - tickstart) > LSI_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + + /* Set LSI division factor */ + MODIFY_REG(RCC->CSR, RCC_CSR_LSIPREDIV, RCC_OscInitStruct->LSIDiv); + } +#endif /* RCC_CSR_LSIPREDIV */ + + /* Enable the Internal Low Speed oscillator (LSI). */ + __HAL_RCC_LSI_ENABLE(); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till LSI is ready */ + while(READ_BIT(RCC->CSR, RCC_CSR_LSIRDY) == 0U) + { + 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(READ_BIT(RCC->CSR, RCC_CSR_LSIRDY) != 0U) + { + 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_IS_BIT_CLR(RCC->APB1ENR1, RCC_APB1ENR1_PWREN)) + { + __HAL_RCC_PWR_CLK_ENABLE(); + pwrclkchanged = SET; + } + + if(HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP)) + { + /* Enable write access to Backup domain */ + SET_BIT(PWR->CR1, PWR_CR1_DBP); + + /* Wait for Backup domain Write protection disable */ + tickstart = HAL_GetTick(); + + while(HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP)) + { + if((HAL_GetTick() - tickstart) > RCC_DBP_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + + /* Set the new LSE configuration -----------------------------------------*/ +#if defined(RCC_BDCR_LSESYSDIS) + if((RCC_OscInitStruct->LSEState & RCC_BDCR_LSEON) != 0U) + { + /* Set LSESYSDIS bit according to LSE propagation option (enabled or disabled) */ + MODIFY_REG(RCC->BDCR, RCC_BDCR_LSESYSDIS, (RCC_OscInitStruct->LSEState & RCC_BDCR_LSESYSDIS)); + + if((RCC_OscInitStruct->LSEState & RCC_BDCR_LSEBYP) != 0U) + { + /* LSE oscillator bypass enable */ + SET_BIT(RCC->BDCR, RCC_BDCR_LSEBYP); + SET_BIT(RCC->BDCR, RCC_BDCR_LSEON); + } + else + { + /* LSE oscillator enable */ + SET_BIT(RCC->BDCR, RCC_BDCR_LSEON); + } + } + else + { + CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSEON); + CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSEBYP); + } +#else + __HAL_RCC_LSE_CONFIG(RCC_OscInitStruct->LSEState); +#endif /* RCC_BDCR_LSESYSDIS */ + + /* Check the LSE State */ + if(RCC_OscInitStruct->LSEState != RCC_LSE_OFF) + { + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till LSE is ready */ + while(READ_BIT(RCC->BDCR, RCC_BDCR_LSERDY) == 0U) + { + if((HAL_GetTick() - tickstart) > RCC_LSE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + else + { + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till LSE is disabled */ + while(READ_BIT(RCC->BDCR, RCC_BDCR_LSERDY) != 0U) + { + if((HAL_GetTick() - tickstart) > RCC_LSE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + +#if defined(RCC_BDCR_LSESYSDIS) + /* By default, stop disabling LSE propagation */ + CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSESYSDIS); +#endif /* RCC_BDCR_LSESYSDIS */ + } + + /* Restore clock configuration if changed */ + if(pwrclkchanged == SET) + { + __HAL_RCC_PWR_CLK_DISABLE(); + } + } +#if defined(RCC_HSI48_SUPPORT) + /*------------------------------ HSI48 Configuration -----------------------*/ + if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSI48) == RCC_OSCILLATORTYPE_HSI48) + { + /* Check the parameters */ + assert_param(IS_RCC_HSI48(RCC_OscInitStruct->HSI48State)); + + /* Check the LSI State */ + if(RCC_OscInitStruct->HSI48State != RCC_HSI48_OFF) + { + /* Enable the Internal Low Speed oscillator (HSI48). */ + __HAL_RCC_HSI48_ENABLE(); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till HSI48 is ready */ + while(READ_BIT(RCC->CRRCR, RCC_CRRCR_HSI48RDY) == 0U) + { + if((HAL_GetTick() - tickstart) > HSI48_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + else + { + /* Disable the Internal Low Speed oscillator (HSI48). */ + __HAL_RCC_HSI48_DISABLE(); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till HSI48 is disabled */ + while(READ_BIT(RCC->CRRCR, RCC_CRRCR_HSI48RDY) != 0U) + { + if((HAL_GetTick() - tickstart) > HSI48_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + } +#endif /* RCC_HSI48_SUPPORT */ + /*-------------------------------- 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(sysclk_source != RCC_CFGR_SWS_PLL) + { + if(RCC_OscInitStruct->PLL.PLLState == RCC_PLL_ON) + { + /* Check the parameters */ + assert_param(IS_RCC_PLLSOURCE(RCC_OscInitStruct->PLL.PLLSource)); + assert_param(IS_RCC_PLLM_VALUE(RCC_OscInitStruct->PLL.PLLM)); + assert_param(IS_RCC_PLLN_VALUE(RCC_OscInitStruct->PLL.PLLN)); +#if defined(RCC_PLLP_SUPPORT) + assert_param(IS_RCC_PLLP_VALUE(RCC_OscInitStruct->PLL.PLLP)); +#endif /* RCC_PLLP_SUPPORT */ + assert_param(IS_RCC_PLLQ_VALUE(RCC_OscInitStruct->PLL.PLLQ)); + assert_param(IS_RCC_PLLR_VALUE(RCC_OscInitStruct->PLL.PLLR)); + + /* Disable the main PLL. */ + __HAL_RCC_PLL_DISABLE(); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till PLL is ready */ + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY) != 0U) + { + if((HAL_GetTick() - tickstart) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Configure the main PLL clock source, multiplication and division factors. */ + __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource, + RCC_OscInitStruct->PLL.PLLM, + RCC_OscInitStruct->PLL.PLLN, +#if defined(RCC_PLLP_SUPPORT) + RCC_OscInitStruct->PLL.PLLP, +#endif + RCC_OscInitStruct->PLL.PLLQ, + RCC_OscInitStruct->PLL.PLLR); + + /* Enable the main PLL. */ + __HAL_RCC_PLL_ENABLE(); + + /* Enable PLL System Clock output. */ + __HAL_RCC_PLLCLKOUT_ENABLE(RCC_PLL_SYSCLK); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till PLL is ready */ + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY) == 0U) + { + if((HAL_GetTick() - tickstart) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + else + { + /* Disable the main PLL. */ + __HAL_RCC_PLL_DISABLE(); + + /* Disable all PLL outputs to save power if no PLLs on */ +#if defined(RCC_PLLSAI1_SUPPORT) && defined(RCC_CR_PLLSAI2RDY) + if(READ_BIT(RCC->CR, (RCC_CR_PLLSAI1RDY | RCC_CR_PLLSAI2RDY)) == 0U) + { + MODIFY_REG(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC, RCC_PLLSOURCE_NONE); + } +#elif defined(RCC_PLLSAI1_SUPPORT) + if(READ_BIT(RCC->CR, RCC_CR_PLLSAI1RDY) == 0U) + { + MODIFY_REG(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC, RCC_PLLSOURCE_NONE); + } +#else + MODIFY_REG(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC, RCC_PLLSOURCE_NONE); +#endif /* RCC_PLLSAI1_SUPPORT && RCC_CR_PLLSAI2RDY */ + +#if defined(RCC_PLLSAI2_SUPPORT) + __HAL_RCC_PLLCLKOUT_DISABLE(RCC_PLL_SYSCLK | RCC_PLL_48M1CLK | RCC_PLL_SAI3CLK); +#elif defined(RCC_PLLSAI1_SUPPORT) + __HAL_RCC_PLLCLKOUT_DISABLE(RCC_PLL_SYSCLK | RCC_PLL_48M1CLK | RCC_PLL_SAI2CLK); +#else + __HAL_RCC_PLLCLKOUT_DISABLE(RCC_PLL_SYSCLK | RCC_PLL_48M1CLK); +#endif /* RCC_PLLSAI2_SUPPORT */ + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + /* Wait till PLL is disabled */ + while(READ_BIT(RCC->CR, RCC_CR_PLLRDY) != 0U) + { + if((HAL_GetTick() - tickstart) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + } + else + { + /* Check if there is a request to disable the PLL used as System clock source */ + if((RCC_OscInitStruct->PLL.PLLState) == RCC_PLL_OFF) + { + return HAL_ERROR; + } + else + { + pll_config = RCC->PLLCFGR; + /* Do not return HAL_ERROR if request repeats the current configuration */ + if((READ_BIT(pll_config, RCC_PLLCFGR_PLLSRC) != RCC_OscInitStruct->PLL.PLLSource) || + (READ_BIT(pll_config, RCC_PLLCFGR_PLLM) != ((RCC_OscInitStruct->PLL.PLLM - 1U) << RCC_PLLCFGR_PLLM_Pos)) || + (READ_BIT(pll_config, RCC_PLLCFGR_PLLN) != (RCC_OscInitStruct->PLL.PLLN << RCC_PLLCFGR_PLLN_Pos)) || +#if defined(RCC_PLLP_SUPPORT) +#if defined(RCC_PLLP_DIV_2_31_SUPPORT) + (READ_BIT(pll_config, RCC_PLLCFGR_PLLPDIV) != (RCC_OscInitStruct->PLL.PLLP << RCC_PLLCFGR_PLLPDIV_Pos)) || +#else + (READ_BIT(pll_config, RCC_PLLCFGR_PLLP) != ((RCC_OscInitStruct->PLL.PLLP == RCC_PLLP_DIV7) ? 0U : 1U)) || +#endif +#endif + (READ_BIT(pll_config, RCC_PLLCFGR_PLLQ) != ((((RCC_OscInitStruct->PLL.PLLQ) >> 1U) - 1U) << RCC_PLLCFGR_PLLQ_Pos)) || + (READ_BIT(pll_config, RCC_PLLCFGR_PLLR) != ((((RCC_OscInitStruct->PLL.PLLR) >> 1U) - 1U) << RCC_PLLCFGR_PLLR_Pos))) + { + return HAL_ERROR; + } + } + } + } + return HAL_OK; +} + +/** + * @brief Initialize the CPU, AHB and APB busses clocks according to the specified + * parameters in the RCC_ClkInitStruct. + * @param RCC_ClkInitStruct pointer to an RCC_OscInitTypeDef structure that + * contains the configuration information for the RCC peripheral. + * @param FLatency FLASH Latency + * This parameter can be one of the following values: + * @arg FLASH_LATENCY_0 FLASH 0 Latency cycle + * @arg FLASH_LATENCY_1 FLASH 1 Latency cycle + * @arg FLASH_LATENCY_2 FLASH 2 Latency cycles + * @arg FLASH_LATENCY_3 FLASH 3 Latency cycles + * @arg FLASH_LATENCY_4 FLASH 4 Latency cycles + @if STM32L4S9xx + * @arg FLASH_LATENCY_5 FLASH 5 Latency cycles + * @arg FLASH_LATENCY_6 FLASH 6 Latency cycles + * @arg FLASH_LATENCY_7 FLASH 7 Latency cycles + * @arg FLASH_LATENCY_8 FLASH 8 Latency cycles + * @arg FLASH_LATENCY_9 FLASH 9 Latency cycles + * @arg FLASH_LATENCY_10 FLASH 10 Latency cycles + * @arg FLASH_LATENCY_11 FLASH 11 Latency cycles + * @arg FLASH_LATENCY_12 FLASH 12 Latency cycles + * @arg FLASH_LATENCY_13 FLASH 13 Latency cycles + * @arg FLASH_LATENCY_14 FLASH 14 Latency cycles + * @arg FLASH_LATENCY_15 FLASH 15 Latency cycles + @endif + * + * @note The SystemCoreClock CMSIS variable is used to store System Clock Frequency + * and updated by HAL_RCC_GetHCLKFreq() function called within this function + * + * @note The MSI is used by default as system clock source after + * startup from Reset, wake-up from STANDBY mode. After restart from Reset, + * the MSI frequency is set to its default value 4 MHz. + * + * @note The HSI can be selected as system clock source after + * from STOP modes or in case of failure of the HSE used directly or indirectly + * as system clock (if the Clock Security System CSS is enabled). + * + * @note A switch from one clock source to another occurs only if the target + * clock source is ready (clock stable after startup delay or PLL locked). + * If a clock source which is not yet ready is selected, the switch will + * occur when the clock source is ready. + * + * @note You can use HAL_RCC_GetClockConfig() function to know which clock is + * currently used as system clock source. + * + * @note Depending on the device voltage range, the software has to set correctly + * HPRE[3:0] bits to ensure that HCLK not exceed the maximum allowed frequency + * (for more details refer to section above "Initialization/de-initialization functions") + * @retval None + */ +HAL_StatusTypeDef HAL_RCC_ClockConfig(RCC_ClkInitTypeDef *RCC_ClkInitStruct, uint32_t FLatency) +{ + uint32_t tickstart; +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) + uint32_t hpre = RCC_SYSCLK_DIV1; +#endif + HAL_StatusTypeDef status; + + /* Check Null pointer */ + if(RCC_ClkInitStruct == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_RCC_CLOCKTYPE(RCC_ClkInitStruct->ClockType)); + assert_param(IS_FLASH_LATENCY(FLatency)); + + /* To correctly read data from FLASH memory, the number of wait states (LATENCY) + must be correctly programmed according to the frequency of the CPU clock + (HCLK) and the supply voltage of the device. */ + + /* Increasing the number of wait states because of higher CPU frequency */ + if(FLatency > __HAL_FLASH_GET_LATENCY()) + { + /* Program the new number of wait states to the LATENCY bits in the FLASH_ACR register */ + __HAL_FLASH_SET_LATENCY(FLatency); + + /* Check that the new number of wait states is taken into account to access the Flash + memory by reading the FLASH_ACR register */ + if(__HAL_FLASH_GET_LATENCY() != FLatency) + { + return HAL_ERROR; + } + } + + /*------------------------- SYSCLK Configuration ---------------------------*/ + if(((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_SYSCLK) == RCC_CLOCKTYPE_SYSCLK) + { + assert_param(IS_RCC_SYSCLKSOURCE(RCC_ClkInitStruct->SYSCLKSource)); + + /* PLL is selected as System Clock Source */ + if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_PLLCLK) + { + /* Check the PLL ready flag */ + if(READ_BIT(RCC->CR, RCC_CR_PLLRDY) == 0U) + { + return HAL_ERROR; + } +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) + /* Undershoot management when selection PLL as SYSCLK source and frequency above 80Mhz */ + /* Compute target PLL output frequency */ + if(RCC_GetSysClockFreqFromPLLSource() > 80000000U) + { + if(READ_BIT(RCC->CFGR, RCC_CFGR_HPRE) == RCC_SYSCLK_DIV1) + { + /* Intermediate step with HCLK prescaler 2 necessary before to go over 80Mhz */ + MODIFY_REG(RCC->CFGR, RCC_CFGR_HPRE, RCC_SYSCLK_DIV2); + hpre = RCC_SYSCLK_DIV2; + } + else if((((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_HCLK) == RCC_CLOCKTYPE_HCLK) && (RCC_ClkInitStruct->AHBCLKDivider == RCC_SYSCLK_DIV1)) + { + /* Intermediate step with HCLK prescaler 2 necessary before to go over 80Mhz */ + MODIFY_REG(RCC->CFGR, RCC_CFGR_HPRE, RCC_SYSCLK_DIV2); + hpre = RCC_SYSCLK_DIV2; + } + else + { + /* nothing to do */ + } + } +#endif + } + else + { + /* HSE is selected as System Clock Source */ + if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_HSE) + { + /* Check the HSE ready flag */ + if(READ_BIT(RCC->CR, RCC_CR_HSERDY) == 0U) + { + return HAL_ERROR; + } + } + /* MSI is selected as System Clock Source */ + else if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_MSI) + { + /* Check the MSI ready flag */ + if(READ_BIT(RCC->CR, RCC_CR_MSIRDY) == 0U) + { + return HAL_ERROR; + } + } + /* HSI is selected as System Clock Source */ + else + { + /* Check the HSI ready flag */ + if(READ_BIT(RCC->CR, RCC_CR_HSIRDY) == 0U) + { + return HAL_ERROR; + } + } +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) + /* Overshoot management when going down from PLL as SYSCLK source and frequency above 80Mhz */ + if(HAL_RCC_GetSysClockFreq() > 80000000U) + { + /* Intermediate step with HCLK prescaler 2 necessary before to go under 80Mhz */ + MODIFY_REG(RCC->CFGR, RCC_CFGR_HPRE, RCC_SYSCLK_DIV2); + hpre = RCC_SYSCLK_DIV2; + } +#endif + + } + + MODIFY_REG(RCC->CFGR, RCC_CFGR_SW, RCC_ClkInitStruct->SYSCLKSource); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + + while(__HAL_RCC_GET_SYSCLK_SOURCE() != (RCC_ClkInitStruct->SYSCLKSource << RCC_CFGR_SWS_Pos)) + { + if((HAL_GetTick() - tickstart) > CLOCKSWITCH_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + + /*-------------------------- HCLK Configuration --------------------------*/ + if(((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_HCLK) == RCC_CLOCKTYPE_HCLK) + { + assert_param(IS_RCC_HCLK(RCC_ClkInitStruct->AHBCLKDivider)); + MODIFY_REG(RCC->CFGR, RCC_CFGR_HPRE, RCC_ClkInitStruct->AHBCLKDivider); + } +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) + else + { + /* Is intermediate HCLK prescaler 2 applied internally, complete with HCLK prescaler 1 */ + if(hpre == RCC_SYSCLK_DIV2) + { + MODIFY_REG(RCC->CFGR, RCC_CFGR_HPRE, RCC_SYSCLK_DIV1); + } + } +#endif + + /* Decreasing the number of wait states because of lower CPU frequency */ + if(FLatency < __HAL_FLASH_GET_LATENCY()) + { + /* Program the new number of wait states to the LATENCY bits in the FLASH_ACR register */ + __HAL_FLASH_SET_LATENCY(FLatency); + + /* Check that the new number of wait states is taken into account to access the Flash + memory by reading the FLASH_ACR register */ + if(__HAL_FLASH_GET_LATENCY() != FLatency) + { + return HAL_ERROR; + } + } + + /*-------------------------- PCLK1 Configuration ---------------------------*/ + if(((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_PCLK1) == RCC_CLOCKTYPE_PCLK1) + { + assert_param(IS_RCC_PCLK(RCC_ClkInitStruct->APB1CLKDivider)); + MODIFY_REG(RCC->CFGR, RCC_CFGR_PPRE1, RCC_ClkInitStruct->APB1CLKDivider); + } + + /*-------------------------- PCLK2 Configuration ---------------------------*/ + if(((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_PCLK2) == RCC_CLOCKTYPE_PCLK2) + { + assert_param(IS_RCC_PCLK(RCC_ClkInitStruct->APB2CLKDivider)); + MODIFY_REG(RCC->CFGR, RCC_CFGR_PPRE2, ((RCC_ClkInitStruct->APB2CLKDivider) << 3U)); + } + + /* Update the SystemCoreClock global variable */ + SystemCoreClock = HAL_RCC_GetSysClockFreq() >> (AHBPrescTable[READ_BIT(RCC->CFGR, RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos] & 0x1FU); + + /* Configure the source of time base considering new system clocks settings*/ + status = HAL_InitTick(uwTickPrio); + + return status; +} + +/** + * @} + */ + +/** @defgroup RCC_Exported_Functions_Group2 Peripheral Control functions + * @brief RCC clocks control functions + * +@verbatim + =============================================================================== + ##### Peripheral Control functions ##### + =============================================================================== + [..] + This subsection provides a set of functions allowing to: + + (+) Ouput clock to MCO pin. + (+) Retrieve current clock frequencies. + (+) Enable the Clock Security System. + +@endverbatim + * @{ + */ + +/** + * @brief Select the clock source to output on MCO pin(PA8). + * @note PA8 should be configured in alternate function mode. + * @param RCC_MCOx specifies the output direction for the clock source. + * For STM32L4xx family this parameter can have only one value: + * @arg @ref RCC_MCO1 Clock source to output on MCO1 pin(PA8). + * @param RCC_MCOSource specifies the clock source to output. + * This parameter can be one of the following values: + * @arg @ref RCC_MCO1SOURCE_NOCLOCK MCO output disabled, no clock on MCO + * @arg @ref RCC_MCO1SOURCE_SYSCLK system clock selected as MCO source + * @arg @ref RCC_MCO1SOURCE_MSI MSI clock selected as MCO source + * @arg @ref RCC_MCO1SOURCE_HSI HSI clock selected as MCO source + * @arg @ref RCC_MCO1SOURCE_HSE HSE clock selected as MCO sourcee + * @arg @ref RCC_MCO1SOURCE_PLLCLK main PLL clock selected as MCO source + * @arg @ref RCC_MCO1SOURCE_LSI LSI clock selected as MCO source + * @arg @ref RCC_MCO1SOURCE_LSE LSE clock selected as MCO source + @if STM32L443xx + * @arg @ref RCC_MCO1SOURCE_HSI48 HSI48 clock selected as MCO source for devices with HSI48 + @endif + * @param RCC_MCODiv specifies the MCO prescaler. + * This parameter can be one of the following values: + * @arg @ref RCC_MCODIV_1 no division applied to MCO clock + * @arg @ref RCC_MCODIV_2 division by 2 applied to MCO clock + * @arg @ref RCC_MCODIV_4 division by 4 applied to MCO clock + * @arg @ref RCC_MCODIV_8 division by 8 applied to MCO clock + * @arg @ref RCC_MCODIV_16 division by 16 applied to MCO clock + * @retval None + */ +void HAL_RCC_MCOConfig( uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv) +{ + GPIO_InitTypeDef GPIO_InitStruct; + + /* Check the parameters */ + assert_param(IS_RCC_MCO(RCC_MCOx)); + assert_param(IS_RCC_MCODIV(RCC_MCODiv)); + assert_param(IS_RCC_MCO1SOURCE(RCC_MCOSource)); + + /* Prevent unused argument(s) compilation warning if no assert_param check */ + UNUSED(RCC_MCOx); + + /* MCO Clock Enable */ + __MCO1_CLK_ENABLE(); + + /* Configue the MCO1 pin in alternate function mode */ + GPIO_InitStruct.Pin = MCO1_PIN; + GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; + GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; + GPIO_InitStruct.Pull = GPIO_NOPULL; + GPIO_InitStruct.Alternate = GPIO_AF0_MCO; + HAL_GPIO_Init(MCO1_GPIO_PORT, &GPIO_InitStruct); + + /* Mask MCOSEL[] and MCOPRE[] bits then set MCO1 clock source and prescaler */ + MODIFY_REG(RCC->CFGR, (RCC_CFGR_MCOSEL | RCC_CFGR_MCOPRE), (RCC_MCOSource | RCC_MCODiv )); +} + +/** + * @brief Return the SYSCLK frequency. + * + * @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: + * @note If SYSCLK source is MSI, function returns values based on MSI + * Value as defined by the MSI range. + * @note If SYSCLK source is HSI, function returns values based on HSI_VALUE(*) + * @note If SYSCLK source is HSE, function returns values based on HSE_VALUE(**) + * @note If SYSCLK source is PLL, function returns values based on HSE_VALUE(**), + * HSI_VALUE(*) or MSI Value multiplied/divided by the PLL factors. + * @note (*) HSI_VALUE is a constant defined in stm32l4xx_hal_conf.h file (default value + * 16 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * @note (**) HSE_VALUE is a constant defined in stm32l4xx_hal_conf.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. + * + * @note The result of this function could be not correct when using fractional + * value for HSE crystal. + * + * @note This function can be used by the user application to compute the + * baudrate for the communication peripherals or configure other parameters. + * + * @note Each time SYSCLK changes, this function must be called to update the + * right SYSCLK value. Otherwise, any configuration based on this function will be incorrect. + * + * + * @retval SYSCLK frequency + */ +uint32_t HAL_RCC_GetSysClockFreq(void) +{ + uint32_t msirange = 0U, sysclockfreq = 0U; + uint32_t pllvco, pllsource, pllr, pllm; /* no init needed */ + uint32_t sysclk_source, pll_oscsource; + + sysclk_source = __HAL_RCC_GET_SYSCLK_SOURCE(); + pll_oscsource = __HAL_RCC_GET_PLL_OSCSOURCE(); + + if((sysclk_source == RCC_CFGR_SWS_MSI) || + ((sysclk_source == RCC_CFGR_SWS_PLL) && (pll_oscsource == RCC_PLLSOURCE_MSI))) + { + /* MSI or PLL with MSI source used as system clock source */ + + /* Get SYSCLK source */ + if(READ_BIT(RCC->CR, RCC_CR_MSIRGSEL) == 0U) + { /* MSISRANGE from RCC_CSR applies */ + msirange = READ_BIT(RCC->CSR, RCC_CSR_MSISRANGE) >> RCC_CSR_MSISRANGE_Pos; + } + else + { /* MSIRANGE from RCC_CR applies */ + msirange = READ_BIT(RCC->CR, RCC_CR_MSIRANGE) >> RCC_CR_MSIRANGE_Pos; + } + /*MSI frequency range in HZ*/ + msirange = MSIRangeTable[msirange]; + + if(sysclk_source == RCC_CFGR_SWS_MSI) + { + /* MSI used as system clock source */ + sysclockfreq = msirange; + } + } + else if(sysclk_source == RCC_CFGR_SWS_HSI) + { + /* HSI used as system clock source */ + sysclockfreq = HSI_VALUE; + } + else if(sysclk_source == RCC_CFGR_SWS_HSE) + { + /* HSE used as system clock source */ + sysclockfreq = HSE_VALUE; + } + else + { + /* unexpected case: sysclockfreq at 0 */ + } + + if(sysclk_source == RCC_CFGR_SWS_PLL) + { + /* PLL used as system clock source */ + + /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE) * PLLN / PLLM + SYSCLK = PLL_VCO / PLLR + */ + pllsource = READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC); + + switch (pllsource) + { + case RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ + pllvco = HSI_VALUE; + break; + + case RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ + pllvco = HSE_VALUE; + break; + + case RCC_PLLSOURCE_MSI: /* MSI used as PLL clock source */ + default: + pllvco = msirange; + break; + } + pllm = (READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLM) >> RCC_PLLCFGR_PLLM_Pos) + 1U ; + pllvco = (pllvco * (READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLN) >> RCC_PLLCFGR_PLLN_Pos)) / pllm; + pllr = ((READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLR) >> RCC_PLLCFGR_PLLR_Pos) + 1U ) * 2U; + sysclockfreq = pllvco / pllr; + } + + return sysclockfreq; +} + +/** + * @brief Return the HCLK frequency. + * @note Each time HCLK changes, this function must be called to update the + * right HCLK value. Otherwise, any configuration based on this function will be incorrect. + * + * @note The SystemCoreClock CMSIS variable is used to store System Clock Frequency. + * @retval HCLK frequency in Hz + */ +uint32_t HAL_RCC_GetHCLKFreq(void) +{ + return SystemCoreClock; +} + +/** + * @brief Return the PCLK1 frequency. + * @note Each time PCLK1 changes, this function must be called to update the + * right PCLK1 value. Otherwise, any configuration based on this function will be incorrect. + * @retval PCLK1 frequency in Hz + */ +uint32_t HAL_RCC_GetPCLK1Freq(void) +{ + /* Get HCLK source and Compute PCLK1 frequency ---------------------------*/ + return (HAL_RCC_GetHCLKFreq() >> (APBPrescTable[READ_BIT(RCC->CFGR, RCC_CFGR_PPRE1) >> RCC_CFGR_PPRE1_Pos] & 0x1FU)); +} + +/** + * @brief Return the PCLK2 frequency. + * @note Each time PCLK2 changes, this function must be called to update the + * right PCLK2 value. Otherwise, any configuration based on this function will be incorrect. + * @retval PCLK2 frequency in Hz + */ +uint32_t HAL_RCC_GetPCLK2Freq(void) +{ + /* Get HCLK source and Compute PCLK2 frequency ---------------------------*/ + return (HAL_RCC_GetHCLKFreq()>> (APBPrescTable[READ_BIT(RCC->CFGR, RCC_CFGR_PPRE2) >> RCC_CFGR_PPRE2_Pos] & 0x1FU)); +} + +/** + * @brief Configure the RCC_OscInitStruct according to the internal + * RCC configuration registers. + * @param RCC_OscInitStruct pointer to an RCC_OscInitTypeDef structure that + * will be configured. + * @retval None + */ +void HAL_RCC_GetOscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct) +{ + /* Check the parameters */ + assert_param(RCC_OscInitStruct != (void *)NULL); + + /* Set all possible values for the Oscillator type parameter ---------------*/ +#if defined(RCC_HSI48_SUPPORT) + RCC_OscInitStruct->OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_MSI | \ + RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSI48; +#else + RCC_OscInitStruct->OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_MSI | \ + RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_LSI; +#endif /* RCC_HSI48_SUPPORT */ + + /* Get the HSE configuration -----------------------------------------------*/ + if(READ_BIT(RCC->CR, RCC_CR_HSEBYP) == RCC_CR_HSEBYP) + { + RCC_OscInitStruct->HSEState = RCC_HSE_BYPASS; + } + else if(READ_BIT(RCC->CR, RCC_CR_HSEON) == RCC_CR_HSEON) + { + RCC_OscInitStruct->HSEState = RCC_HSE_ON; + } + else + { + RCC_OscInitStruct->HSEState = RCC_HSE_OFF; + } + + /* Get the MSI configuration -----------------------------------------------*/ + if(READ_BIT(RCC->CR, RCC_CR_MSION) == RCC_CR_MSION) + { + RCC_OscInitStruct->MSIState = RCC_MSI_ON; + } + else + { + RCC_OscInitStruct->MSIState = RCC_MSI_OFF; + } + + RCC_OscInitStruct->MSICalibrationValue = READ_BIT(RCC->ICSCR, RCC_ICSCR_MSITRIM) >> RCC_ICSCR_MSITRIM_Pos; + RCC_OscInitStruct->MSIClockRange = READ_BIT(RCC->CR, RCC_CR_MSIRANGE); + + /* Get the HSI configuration -----------------------------------------------*/ + if(READ_BIT(RCC->CR, RCC_CR_HSION) == RCC_CR_HSION) + { + RCC_OscInitStruct->HSIState = RCC_HSI_ON; + } + else + { + RCC_OscInitStruct->HSIState = RCC_HSI_OFF; + } + + RCC_OscInitStruct->HSICalibrationValue = READ_BIT(RCC->ICSCR, RCC_ICSCR_HSITRIM) >> RCC_ICSCR_HSITRIM_Pos; + + /* Get the LSE configuration -----------------------------------------------*/ + if(READ_BIT(RCC->BDCR, RCC_BDCR_LSEBYP) == RCC_BDCR_LSEBYP) + { +#if defined(RCC_BDCR_LSESYSDIS) + if((RCC->BDCR & RCC_BDCR_LSESYSDIS) == RCC_BDCR_LSESYSDIS) + { + RCC_OscInitStruct->LSEState = RCC_LSE_BYPASS_RTC_ONLY; + } + else +#endif /* RCC_BDCR_LSESYSDIS */ + { + RCC_OscInitStruct->LSEState = RCC_LSE_BYPASS; + } + } + else if(READ_BIT(RCC->BDCR, RCC_BDCR_LSEON) == RCC_BDCR_LSEON) + { +#if defined(RCC_BDCR_LSESYSDIS) + if((RCC->BDCR & RCC_BDCR_LSESYSDIS) == RCC_BDCR_LSESYSDIS) + { + RCC_OscInitStruct->LSEState = RCC_LSE_ON_RTC_ONLY; + } + else +#endif /* RCC_BDCR_LSESYSDIS */ + { + RCC_OscInitStruct->LSEState = RCC_LSE_ON; + } + } + else + { + RCC_OscInitStruct->LSEState = RCC_LSE_OFF; + } + + /* Get the LSI configuration -----------------------------------------------*/ + if(READ_BIT(RCC->CSR, RCC_CSR_LSION) == RCC_CSR_LSION) + { + RCC_OscInitStruct->LSIState = RCC_LSI_ON; + } + else + { + RCC_OscInitStruct->LSIState = RCC_LSI_OFF; + } +#if defined(RCC_CSR_LSIPREDIV) + + /* Get the LSI configuration -----------------------------------------------*/ + if((RCC->CSR & RCC_CSR_LSIPREDIV) == RCC_CSR_LSIPREDIV) + { + RCC_OscInitStruct->LSIDiv = RCC_LSI_DIV128; + } + else + { + RCC_OscInitStruct->LSIDiv = RCC_LSI_DIV1; + } +#endif /* RCC_CSR_LSIPREDIV */ + +#if defined(RCC_HSI48_SUPPORT) + /* Get the HSI48 configuration ---------------------------------------------*/ + if(READ_BIT(RCC->CRRCR, RCC_CRRCR_HSI48ON) == RCC_CRRCR_HSI48ON) + { + RCC_OscInitStruct->HSI48State = RCC_HSI48_ON; + } + else + { + RCC_OscInitStruct->HSI48State = RCC_HSI48_OFF; + } +#else + RCC_OscInitStruct->HSI48State = RCC_HSI48_OFF; +#endif /* RCC_HSI48_SUPPORT */ + + /* Get the PLL configuration -----------------------------------------------*/ + if(READ_BIT(RCC->CR, RCC_CR_PLLON) == RCC_CR_PLLON) + { + RCC_OscInitStruct->PLL.PLLState = RCC_PLL_ON; + } + else + { + RCC_OscInitStruct->PLL.PLLState = RCC_PLL_OFF; + } + RCC_OscInitStruct->PLL.PLLSource = READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC); + RCC_OscInitStruct->PLL.PLLM = (READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLM) >> RCC_PLLCFGR_PLLM_Pos) + 1U; + RCC_OscInitStruct->PLL.PLLN = READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLN) >> RCC_PLLCFGR_PLLN_Pos; + RCC_OscInitStruct->PLL.PLLQ = (((READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLQ) >> RCC_PLLCFGR_PLLQ_Pos) + 1U) << 1U); + RCC_OscInitStruct->PLL.PLLR = (((READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLR) >> RCC_PLLCFGR_PLLR_Pos) + 1U) << 1U); +#if defined(RCC_PLLP_SUPPORT) +#if defined(RCC_PLLP_DIV_2_31_SUPPORT) + RCC_OscInitStruct->PLL.PLLP = READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLPDIV) >> RCC_PLLCFGR_PLLPDIV_Pos; +#else + if(READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLP) != 0U) + { + RCC_OscInitStruct->PLL.PLLP = RCC_PLLP_DIV17; + } + else + { + RCC_OscInitStruct->PLL.PLLP = RCC_PLLP_DIV7; + } +#endif /* RCC_PLLP_DIV_2_31_SUPPORT */ +#endif /* RCC_PLLP_SUPPORT */ +} + +/** + * @brief Configure the RCC_ClkInitStruct according to the internal + * RCC configuration registers. + * @param RCC_ClkInitStruct pointer to an RCC_ClkInitTypeDef structure that + * will be configured. + * @param pFLatency Pointer on the Flash Latency. + * @retval None + */ +void HAL_RCC_GetClockConfig(RCC_ClkInitTypeDef *RCC_ClkInitStruct, uint32_t *pFLatency) +{ + /* Check the parameters */ + assert_param(RCC_ClkInitStruct != (void *)NULL); + assert_param(pFLatency != (void *)NULL); + + /* Set all possible values for the Clock type parameter --------------------*/ + RCC_ClkInitStruct->ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; + + /* Get the SYSCLK configuration --------------------------------------------*/ + RCC_ClkInitStruct->SYSCLKSource = READ_BIT(RCC->CFGR, RCC_CFGR_SW); + + /* Get the HCLK configuration ----------------------------------------------*/ + RCC_ClkInitStruct->AHBCLKDivider = READ_BIT(RCC->CFGR, RCC_CFGR_HPRE); + + /* Get the APB1 configuration ----------------------------------------------*/ + RCC_ClkInitStruct->APB1CLKDivider = READ_BIT(RCC->CFGR, RCC_CFGR_PPRE1); + + /* Get the APB2 configuration ----------------------------------------------*/ + RCC_ClkInitStruct->APB2CLKDivider = (READ_BIT(RCC->CFGR, RCC_CFGR_PPRE2) >> 3U); + + /* Get the Flash Wait State (Latency) configuration ------------------------*/ + *pFLatency = __HAL_FLASH_GET_LATENCY(); +} + +/** + * @brief Enable the Clock Security System. + * @note If a failure is detected on the HSE oscillator clock, this oscillator + * is automatically disabled and an interrupt is generated to inform the + * software about the failure (Clock Security System Interrupt, CSSI), + * allowing the MCU to perform rescue operations. The CSSI is linked to + * the Cortex-M4 NMI (Non-Maskable Interrupt) exception vector. + * @note The Clock Security System can only be cleared by reset. + * @retval None + */ +void HAL_RCC_EnableCSS(void) +{ + SET_BIT(RCC->CR, RCC_CR_CSSON) ; +} + +/** + * @brief Handle the RCC Clock Security System interrupt request. + * @note This API should be called under the NMI_Handler(). + * @retval None + */ +void HAL_RCC_NMI_IRQHandler(void) +{ + /* Check RCC CSSF interrupt flag */ + if(__HAL_RCC_GET_IT(RCC_IT_CSS)) + { + /* RCC Clock Security System interrupt user callback */ + HAL_RCC_CSSCallback(); + + /* Clear RCC CSS pending bit */ + __HAL_RCC_CLEAR_IT(RCC_IT_CSS); + } +} + +/** + * @brief RCC Clock Security System interrupt callback. + * @retval none + */ +__weak void HAL_RCC_CSSCallback(void) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_RCC_CSSCallback should be implemented in the user file + */ +} + +/** + * @} + */ + +/** + * @} + */ + +/* Private function prototypes -----------------------------------------------*/ +/** @addtogroup RCC_Private_Functions + * @{ + */ +/** + * @brief Update number of Flash wait states in line with MSI range and current + voltage range. + * @param msirange MSI range value from RCC_MSIRANGE_0 to RCC_MSIRANGE_11 + * @retval HAL status + */ +static HAL_StatusTypeDef RCC_SetFlashLatencyFromMSIRange(uint32_t msirange) +{ + uint32_t vos; + uint32_t latency = FLASH_LATENCY_0; /* default value 0WS */ + + if(__HAL_RCC_PWR_IS_CLK_ENABLED()) + { + vos = HAL_PWREx_GetVoltageRange(); + } + else + { + __HAL_RCC_PWR_CLK_ENABLE(); + vos = HAL_PWREx_GetVoltageRange(); + __HAL_RCC_PWR_CLK_DISABLE(); + } + + if(vos == PWR_REGULATOR_VOLTAGE_SCALE1) + { + if(msirange > RCC_MSIRANGE_8) + { + /* MSI > 16Mhz */ + if(msirange > RCC_MSIRANGE_10) + { + /* MSI 48Mhz */ + latency = FLASH_LATENCY_2; /* 2WS */ + } + else + { + /* MSI 24Mhz or 32Mhz */ + latency = FLASH_LATENCY_1; /* 1WS */ + } + } + /* else MSI <= 16Mhz default FLASH_LATENCY_0 0WS */ + } + else + { +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) + if(msirange >= RCC_MSIRANGE_8) + { + /* MSI >= 16Mhz */ + latency = FLASH_LATENCY_2; /* 2WS */ + } + else + { + if(msirange == RCC_MSIRANGE_7) + { + /* MSI 8Mhz */ + latency = FLASH_LATENCY_1; /* 1WS */ + } + /* else MSI < 8Mhz default FLASH_LATENCY_0 0WS */ + } +#else + if(msirange > RCC_MSIRANGE_8) + { + /* MSI > 16Mhz */ + latency = FLASH_LATENCY_3; /* 3WS */ + } + else + { + if(msirange == RCC_MSIRANGE_8) + { + /* MSI 16Mhz */ + latency = FLASH_LATENCY_2; /* 2WS */ + } + else if(msirange == RCC_MSIRANGE_7) + { + /* MSI 8Mhz */ + latency = FLASH_LATENCY_1; /* 1WS */ + } + /* else MSI < 8Mhz default FLASH_LATENCY_0 0WS */ + } +#endif + } + + __HAL_FLASH_SET_LATENCY(latency); + + /* Check that the new number of wait states is taken into account to access the Flash + memory by reading the FLASH_ACR register */ + if(__HAL_FLASH_GET_LATENCY() != latency) + { + return HAL_ERROR; + } + + return HAL_OK; +} + +#if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx) +/** + * @brief Compute SYSCLK frequency based on PLL SYSCLK source. + * @retval SYSCLK frequency + */ +static uint32_t RCC_GetSysClockFreqFromPLLSource(void) +{ + uint32_t msirange = 0U; + uint32_t pllvco, pllsource, pllr, pllm, sysclockfreq; /* no init needed */ + + if(__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_MSI) + { + /* Get MSI range source */ + if(READ_BIT(RCC->CR, RCC_CR_MSIRGSEL) == 0U) + { /* MSISRANGE from RCC_CSR applies */ + msirange = READ_BIT(RCC->CSR, RCC_CSR_MSISRANGE) >> RCC_CSR_MSISRANGE_Pos; + } + else + { /* MSIRANGE from RCC_CR applies */ + msirange = READ_BIT(RCC->CR, RCC_CR_MSIRANGE) >> RCC_CR_MSIRANGE_Pos; + } + /*MSI frequency range in HZ*/ + msirange = MSIRangeTable[msirange]; + } + + /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE) * PLLN / PLLM + SYSCLK = PLL_VCO / PLLR + */ + pllsource = READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLSRC); + + switch (pllsource) + { + case RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ + pllvco = HSI_VALUE; + break; + + case RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ + pllvco = HSE_VALUE; + break; + + case RCC_PLLSOURCE_MSI: /* MSI used as PLL clock source */ + default: + pllvco = msirange; + break; + } + pllm = (READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLM) >> RCC_PLLCFGR_PLLM_Pos) + 1U ; + pllvco = (pllvco * (READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLN) >> RCC_PLLCFGR_PLLN_Pos)) / pllm; + pllr = ((READ_BIT(RCC->PLLCFGR, RCC_PLLCFGR_PLLR) >> RCC_PLLCFGR_PLLR_Pos) + 1U ) * 2U; + sysclockfreq = pllvco / pllr; + + return sysclockfreq; +} +#endif /* STM32L4R5xx || STM32L4R7xx || STM32L4R9xx || STM32L4S5xx || STM32L4S7xx || STM32L4S9xx */ + +/** + * @} + */ + +#endif /* HAL_RCC_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/