/** | |
****************************************************************************** | |
* @file stm32f4xx_hal_rcc.c | |
* @author MCD Application Team | |
* @version V1.7.1 | |
* @date 14-April-2017 | |
* @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 Internal High Speed oscillator | |
(HSI 16MHz) 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 (AHB) and Low speed (APB) busses; | |
all peripherals mapped on these busses are running at HSI speed. | |
(+) The clock for all peripherals is switched off, except the SRAM and FLASH. | |
(+) All GPIOs are in input floating state, 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 (I2S, RTC, ADC, USB OTG FS/SDIO/RNG) | |
##### RCC Limitations ##### | |
============================================================================== | |
[..] | |
A delay between an RCC peripheral clock enable and the effective peripheral | |
enabling should be taken into account in order to manage the peripheral read/write | |
from/to registers. | |
(+) This delay depends on the peripheral mapping. | |
(+) If peripheral is mapped on AHB: the delay is 2 AHB clock cycle | |
after the clock enable bit is set on the hardware register | |
(+) If peripheral is mapped on APB: the delay is 2 APB clock cycle | |
after the clock enable bit is set on the hardware register | |
[..] | |
Implemented Workaround: | |
(+) For AHB & APB peripherals, a dummy read to the peripheral register has been | |
inserted in each __HAL_RCC_PPP_CLK_ENABLE() macro. | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f4xx_hal.h" | |
/** @addtogroup STM32F4xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup RCC RCC | |
* @brief RCC HAL module driver | |
* @{ | |
*/ | |
#ifdef HAL_RCC_MODULE_ENABLED | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/** @addtogroup RCC_Private_Constants | |
* @{ | |
*/ | |
#define CLOCKSWITCH_TIMEOUT_VALUE 5000U /* 5 s */ | |
/* Private macro -------------------------------------------------------------*/ | |
#define __MCO1_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE() | |
#define MCO1_GPIO_PORT GPIOA | |
#define MCO1_PIN GPIO_PIN_8 | |
#define __MCO2_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE() | |
#define MCO2_GPIO_PORT GPIOC | |
#define MCO2_PIN GPIO_PIN_9 | |
/** | |
* @} | |
*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/** @defgroup RCC_Private_Variables RCC Private Variables | |
* @{ | |
*/ | |
/** | |
* @} | |
*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private 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/external oscillators | |
(HSE, HSI, LSE, 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. | |
(#) LSI (low-speed internal), 32 KHz low consumption RC used as IWDG and/or RTC | |
clock source. | |
(#) HSE (high-speed external), 4 to 26 MHz crystal oscillator used directly or | |
through the PLL as System clock source. Can be used also as RTC clock source. | |
(#) LSE (low-speed external), 32 KHz oscillator used as RTC clock source. | |
(#) PLL (clocked by HSI or HSE), featuring two different output clocks: | |
(++) The first output is used to generate the high speed system clock (up to 168 MHz) | |
(++) The second output is used to generate the clock for the USB OTG FS (48 MHz), | |
the random analog generator (<=48 MHz) and the SDIO (<= 48 MHz). | |
(#) CSS (Clock security system), once enable using the macro __HAL_RCC_CSS_ENABLE() | |
and if a HSE clock failure occurs(HSE used directly or through PLL as System | |
clock source), the System clocks 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. | |
(#) MCO1 (microcontroller clock output), used to output HSI, LSE, HSE or PLL | |
clock (through a configurable prescaler) on PA8 pin. | |
(#) MCO2 (microcontroller clock output), used to output HSE, PLL, SYSCLK or PLLI2S | |
clock (through a configurable prescaler) on PC9 pin. | |
[..] System, AHB and APB busses clocks configuration | |
(#) Several clock sources can be used to drive the System clock (SYSCLK): HSI, | |
HSE and 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. | |
(#) For the STM32F405xx/07xx and STM32F415xx/17xx devices, the maximum | |
frequency of the SYSCLK and HCLK is 168 MHz, PCLK2 84 MHz and PCLK1 42 MHz. | |
Depending on the device voltage range, the maximum frequency should | |
be adapted accordingly (refer to the product datasheets for more details). | |
(#) For the STM32F42xxx, STM32F43xxx, STM32F446xx, STM32F469xx and STM32F479xx devices, | |
the maximum frequency of the SYSCLK and HCLK is 180 MHz, PCLK2 90 MHz and PCLK1 45 MHz. | |
Depending on the device voltage range, the maximum frequency should | |
be adapted accordingly (refer to the product datasheets for more details). | |
(#) For the STM32F401xx, the maximum frequency of the SYSCLK and HCLK is 84 MHz, | |
PCLK2 84 MHz and PCLK1 42 MHz. | |
Depending on the device voltage range, the maximum frequency should | |
be adapted accordingly (refer to the product datasheets for more details). | |
(#) For the STM32F41xxx, the maximum frequency of the SYSCLK and HCLK is 100 MHz, | |
PCLK2 100 MHz and PCLK1 50 MHz. | |
Depending on the device voltage range, the maximum frequency should | |
be adapted accordingly (refer to the product datasheets for more details). | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Resets the RCC clock configuration to the default reset state. | |
* @note The default reset state of the clock configuration is given below: | |
* - HSI ON and used as system clock source | |
* - HSE and PLL OFF | |
* - AHB, APB1 and APB2 prescaler set to 1. | |
* - CSS, MCO1 and MCO2 OFF | |
* - All interrupts disabled | |
* @note This function doesn't modify the configuration of the | |
* - Peripheral clocks | |
* - LSI, LSE and RTC clocks | |
* @retval None | |
*/ | |
__weak void HAL_RCC_DeInit(void) | |
{} | |
/** | |
* @brief Initializes 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 API. 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 API. User should request a transition to HSE Off | |
* first and then HSE On or HSE Bypass. | |
* @retval HAL status | |
*/ | |
__weak HAL_StatusTypeDef HAL_RCC_OscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct) | |
{ | |
uint32_t tickstart = 0U; | |
/* Check the parameters */ | |
assert_param(IS_RCC_OSCILLATORTYPE(RCC_OscInitStruct->OscillatorType)); | |
/*------------------------------- 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 HSE will not disabled */ | |
if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_HSE) ||\ | |
((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLL) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSE))) | |
{ | |
if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET) && (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(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else | |
{ | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till HSE is bypassed or disabled */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET) | |
{ | |
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_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((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_HSI) ||\ | |
((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLL) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSI))) | |
{ | |
/* When HSI is used as system clock it will not disabled */ | |
if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) && (RCC_OscInitStruct->HSIState != RCC_HSI_ON)) | |
{ | |
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(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) == RESET) | |
{ | |
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 ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) | |
{ | |
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) | |
{ | |
/* Enable the Internal Low Speed oscillator (LSI). */ | |
__HAL_RCC_LSI_ENABLE(); | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till LSI is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) == RESET) | |
{ | |
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 ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) != RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > LSI_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
} | |
/*------------------------------ LSE Configuration -------------------------*/ | |
if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_LSE) == RCC_OSCILLATORTYPE_LSE) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_RCC_LSE(RCC_OscInitStruct->LSEState)); | |
/* Enable Power Clock*/ | |
__HAL_RCC_PWR_CLK_ENABLE(); | |
/* Enable write access to Backup domain */ | |
PWR->CR |= PWR_CR_DBP; | |
/* Wait for Backup domain Write protection enable */ | |
tickstart = HAL_GetTick(); | |
while((PWR->CR & PWR_CR_DBP) == RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > RCC_DBP_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
/* Set the new LSE configuration -----------------------------------------*/ | |
__HAL_RCC_LSE_CONFIG(RCC_OscInitStruct->LSEState); | |
/* Check the LSE State */ | |
if((RCC_OscInitStruct->LSEState) != RCC_LSE_OFF) | |
{ | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till LSE is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else | |
{ | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till LSE is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) != RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
} | |
/*-------------------------------- 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(__HAL_RCC_GET_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)); | |
assert_param(IS_RCC_PLLP_VALUE(RCC_OscInitStruct->PLL.PLLP)); | |
assert_param(IS_RCC_PLLQ_VALUE(RCC_OscInitStruct->PLL.PLLQ)); | |
/* Disable the main PLL. */ | |
__HAL_RCC_PLL_DISABLE(); | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till PLL is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
/* Configure the main PLL clock source, multiplication and division factors. */ | |
WRITE_REG(RCC->PLLCFGR, (RCC_OscInitStruct->PLL.PLLSource | \ | |
RCC_OscInitStruct->PLL.PLLM | \ | |
(RCC_OscInitStruct->PLL.PLLN << POSITION_VAL(RCC_PLLCFGR_PLLN)) | \ | |
(((RCC_OscInitStruct->PLL.PLLP >> 1U) - 1U) << POSITION_VAL(RCC_PLLCFGR_PLLP)) | \ | |
(RCC_OscInitStruct->PLL.PLLQ << POSITION_VAL(RCC_PLLCFGR_PLLQ)))); | |
/* Enable the main PLL. */ | |
__HAL_RCC_PLL_ENABLE(); | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till PLL is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else | |
{ | |
/* Disable the main PLL. */ | |
__HAL_RCC_PLL_DISABLE(); | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
/* Wait till PLL is ready */ | |
while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET) | |
{ | |
if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
} | |
else | |
{ | |
return HAL_ERROR; | |
} | |
} | |
return HAL_OK; | |
} | |
/** | |
* @brief Initializes 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 depend on device selected | |
* | |
* @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 HSI is used (enabled by hardware) as system clock source after | |
* startup from Reset, wake-up from STOP and STANDBY mode, 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 will be ready. | |
* | |
* @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 = 0U; | |
/* 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 > (FLASH->ACR & FLASH_ACR_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((FLASH->ACR & FLASH_ACR_LATENCY) != FLatency) | |
{ | |
return HAL_ERROR; | |
} | |
} | |
/*-------------------------- 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); | |
} | |
/*------------------------- SYSCLK Configuration ---------------------------*/ | |
if(((RCC_ClkInitStruct->ClockType) & RCC_CLOCKTYPE_SYSCLK) == RCC_CLOCKTYPE_SYSCLK) | |
{ | |
assert_param(IS_RCC_SYSCLKSOURCE(RCC_ClkInitStruct->SYSCLKSource)); | |
/* HSE is selected as System Clock Source */ | |
if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_HSE) | |
{ | |
/* Check the HSE ready flag */ | |
if(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET) | |
{ | |
return HAL_ERROR; | |
} | |
} | |
/* PLL is selected as System Clock Source */ | |
else if((RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_PLLCLK) || | |
(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_PLLRCLK)) | |
{ | |
/* Check the PLL ready flag */ | |
if(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET) | |
{ | |
return HAL_ERROR; | |
} | |
} | |
/* HSI is selected as System Clock Source */ | |
else | |
{ | |
/* Check the HSI ready flag */ | |
if(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) == RESET) | |
{ | |
return HAL_ERROR; | |
} | |
} | |
__HAL_RCC_SYSCLK_CONFIG(RCC_ClkInitStruct->SYSCLKSource); | |
/* Get Start Tick*/ | |
tickstart = HAL_GetTick(); | |
if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_HSE) | |
{ | |
while (__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_HSE) | |
{ | |
if((HAL_GetTick() - tickstart ) > CLOCKSWITCH_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_PLLCLK) | |
{ | |
while (__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_PLLCLK) | |
{ | |
if((HAL_GetTick() - tickstart ) > CLOCKSWITCH_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else if(RCC_ClkInitStruct->SYSCLKSource == RCC_SYSCLKSOURCE_PLLRCLK) | |
{ | |
while (__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_PLLRCLK) | |
{ | |
if((HAL_GetTick() - tickstart ) > CLOCKSWITCH_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
else | |
{ | |
while(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_SYSCLKSOURCE_STATUS_HSI) | |
{ | |
if((HAL_GetTick() - tickstart ) > CLOCKSWITCH_TIMEOUT_VALUE) | |
{ | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
} | |
/* Decreasing the number of wait states because of lower CPU frequency */ | |
if(FLatency < (FLASH->ACR & FLASH_ACR_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((FLASH->ACR & FLASH_ACR_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[(RCC->CFGR & RCC_CFGR_HPRE)>> POSITION_VAL(RCC_CFGR_HPRE)]; | |
/* Configure the source of time base considering new system clocks settings*/ | |
HAL_InitTick (TICK_INT_PRIORITY); | |
return HAL_OK; | |
} | |
/** | |
* @} | |
*/ | |
/** @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 control the RCC Clocks | |
frequencies. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Selects the clock source to output on MCO1 pin(PA8) or on MCO2 pin(PC9). | |
* @note PA8/PC9 should be configured in alternate function mode. | |
* @param RCC_MCOx: specifies the output direction for the clock source. | |
* This parameter can be one of the following values: | |
* @arg RCC_MCO1: Clock source to output on MCO1 pin(PA8). | |
* @arg RCC_MCO2: Clock source to output on MCO2 pin(PC9). | |
* @param RCC_MCOSource: specifies the clock source to output. | |
* This parameter can be one of the following values: | |
* @arg RCC_MCO1SOURCE_HSI: HSI clock selected as MCO1 source | |
* @arg RCC_MCO1SOURCE_LSE: LSE clock selected as MCO1 source | |
* @arg RCC_MCO1SOURCE_HSE: HSE clock selected as MCO1 source | |
* @arg RCC_MCO1SOURCE_PLLCLK: main PLL clock selected as MCO1 source | |
* @arg RCC_MCO2SOURCE_SYSCLK: System clock (SYSCLK) selected as MCO2 source | |
* @arg RCC_MCO2SOURCE_PLLI2SCLK: PLLI2S clock selected as MCO2 source, available for all STM32F4 devices except STM32F410xx | |
* @arg RCC_MCO2SOURCE_I2SCLK: I2SCLK clock selected as MCO2 source, available only for STM32F410Rx devices | |
* @arg RCC_MCO2SOURCE_HSE: HSE clock selected as MCO2 source | |
* @arg RCC_MCO2SOURCE_PLLCLK: main PLL clock selected as MCO2 source | |
* @param RCC_MCODiv: specifies the MCOx prescaler. | |
* This parameter can be one of the following values: | |
* @arg RCC_MCODIV_1: no division applied to MCOx clock | |
* @arg RCC_MCODIV_2: division by 2 applied to MCOx clock | |
* @arg RCC_MCODIV_3: division by 3 applied to MCOx clock | |
* @arg RCC_MCODIV_4: division by 4 applied to MCOx clock | |
* @arg RCC_MCODIV_5: division by 5 applied to MCOx clock | |
* @note For STM32F410Rx devices to output I2SCLK clock on MCO2 you should have | |
* at last one of the SPI clocks enabled (SPI1, SPI2 or SPI5). | |
* @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)); | |
/* RCC_MCO1 */ | |
if(RCC_MCOx == RCC_MCO1) | |
{ | |
assert_param(IS_RCC_MCO1SOURCE(RCC_MCOSource)); | |
/* MCO1 Clock Enable */ | |
__MCO1_CLK_ENABLE(); | |
/* Configure 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_VERY_HIGH; | |
GPIO_InitStruct.Pull = GPIO_NOPULL; | |
GPIO_InitStruct.Alternate = GPIO_AF0_MCO; | |
HAL_GPIO_Init(MCO1_GPIO_PORT, &GPIO_InitStruct); | |
/* Mask MCO1 and MCO1PRE[2:0] bits then Select MCO1 clock source and prescaler */ | |
MODIFY_REG(RCC->CFGR, (RCC_CFGR_MCO1 | RCC_CFGR_MCO1PRE), (RCC_MCOSource | RCC_MCODiv)); | |
/* This RCC MCO1 enable feature is available only on STM32F410xx devices */ | |
#if defined(RCC_CFGR_MCO1EN) | |
__HAL_RCC_MCO1_ENABLE(); | |
#endif /* RCC_CFGR_MCO1EN */ | |
} | |
#if defined(RCC_CFGR_MCO2) | |
else | |
{ | |
assert_param(IS_RCC_MCO2SOURCE(RCC_MCOSource)); | |
/* MCO2 Clock Enable */ | |
__MCO2_CLK_ENABLE(); | |
/* Configure the MCO2 pin in alternate function mode */ | |
GPIO_InitStruct.Pin = MCO2_PIN; | |
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; | |
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; | |
GPIO_InitStruct.Pull = GPIO_NOPULL; | |
GPIO_InitStruct.Alternate = GPIO_AF0_MCO; | |
HAL_GPIO_Init(MCO2_GPIO_PORT, &GPIO_InitStruct); | |
/* Mask MCO2 and MCO2PRE[2:0] bits then Select MCO2 clock source and prescaler */ | |
MODIFY_REG(RCC->CFGR, (RCC_CFGR_MCO2 | RCC_CFGR_MCO2PRE), (RCC_MCOSource | (RCC_MCODiv << 3U))); | |
/* This RCC MCO2 enable feature is available only on STM32F410Rx devices */ | |
#if defined(RCC_CFGR_MCO2EN) | |
__HAL_RCC_MCO2_ENABLE(); | |
#endif /* RCC_CFGR_MCO2EN */ | |
} | |
#endif /* RCC_CFGR_MCO2 */ | |
} | |
/** | |
* @brief Enables 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. | |
* @retval None | |
*/ | |
void HAL_RCC_EnableCSS(void) | |
{ | |
*(__IO uint32_t *) RCC_CR_CSSON_BB = (uint32_t)ENABLE; | |
} | |
/** | |
* @brief Disables the Clock Security System. | |
* @retval None | |
*/ | |
void HAL_RCC_DisableCSS(void) | |
{ | |
*(__IO uint32_t *) RCC_CR_CSSON_BB = (uint32_t)DISABLE; | |
} | |
/** | |
* @brief Returns 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 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(**) | |
* or HSI_VALUE(*) multiplied/divided by the PLL factors. | |
* @note (*) HSI_VALUE is a constant defined in stm32f4xx_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 stm32f4xx_hal_conf.h file (default value | |
* 25 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 | |
*/ | |
__weak uint32_t HAL_RCC_GetSysClockFreq(void) | |
{ | |
uint32_t pllm = 0U, pllvco = 0U, pllp = 0U; | |
uint32_t sysclockfreq = 0U; | |
/* Get SYSCLK source -------------------------------------------------------*/ | |
switch (RCC->CFGR & RCC_CFGR_SWS) | |
{ | |
case RCC_CFGR_SWS_HSI: /* HSI used as system clock source */ | |
{ | |
sysclockfreq = HSI_VALUE; | |
break; | |
} | |
case RCC_CFGR_SWS_HSE: /* HSE used as system clock source */ | |
{ | |
sysclockfreq = HSE_VALUE; | |
break; | |
} | |
case RCC_CFGR_SWS_PLL: /* PLL used as system clock source */ | |
{ | |
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN | |
SYSCLK = PLL_VCO / PLLP */ | |
pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM; | |
if(__HAL_RCC_GET_PLL_OSCSOURCE() != RCC_PLLSOURCE_HSI) | |
{ | |
/* HSE used as PLL clock source */ | |
pllvco = ((HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN))); | |
} | |
else | |
{ | |
/* HSI used as PLL clock source */ | |
pllvco = ((HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN))); | |
} | |
pllp = ((((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >> POSITION_VAL(RCC_PLLCFGR_PLLP)) + 1U) *2U); | |
sysclockfreq = pllvco/pllp; | |
break; | |
} | |
default: | |
{ | |
sysclockfreq = HSI_VALUE; | |
break; | |
} | |
} | |
return sysclockfreq; | |
} | |
/** | |
* @brief Returns 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 | |
* and updated within this function | |
* @retval HCLK frequency | |
*/ | |
uint32_t HAL_RCC_GetHCLKFreq(void) | |
{ | |
return SystemCoreClock; | |
} | |
/** | |
* @brief Returns 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 | |
*/ | |
uint32_t HAL_RCC_GetPCLK1Freq(void) | |
{ | |
/* Get HCLK source and Compute PCLK1 frequency ---------------------------*/ | |
return (HAL_RCC_GetHCLKFreq() >> APBPrescTable[(RCC->CFGR & RCC_CFGR_PPRE1)>> POSITION_VAL(RCC_CFGR_PPRE1)]); | |
} | |
/** | |
* @brief Returns 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 | |
*/ | |
uint32_t HAL_RCC_GetPCLK2Freq(void) | |
{ | |
/* Get HCLK source and Compute PCLK2 frequency ---------------------------*/ | |
return (HAL_RCC_GetHCLKFreq()>> APBPrescTable[(RCC->CFGR & RCC_CFGR_PPRE2)>> POSITION_VAL(RCC_CFGR_PPRE2)]); | |
} | |
/** | |
* @brief Configures 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 | |
*/ | |
__weak void HAL_RCC_GetOscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct) | |
{ | |
/* Set all possible values for the Oscillator type parameter ---------------*/ | |
RCC_OscInitStruct->OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_LSI; | |
/* Get the HSE configuration -----------------------------------------------*/ | |
if((RCC->CR &RCC_CR_HSEBYP) == RCC_CR_HSEBYP) | |
{ | |
RCC_OscInitStruct->HSEState = RCC_HSE_BYPASS; | |
} | |
else if((RCC->CR &RCC_CR_HSEON) == RCC_CR_HSEON) | |
{ | |
RCC_OscInitStruct->HSEState = RCC_HSE_ON; | |
} | |
else | |
{ | |
RCC_OscInitStruct->HSEState = RCC_HSE_OFF; | |
} | |
/* Get the HSI configuration -----------------------------------------------*/ | |
if((RCC->CR &RCC_CR_HSION) == RCC_CR_HSION) | |
{ | |
RCC_OscInitStruct->HSIState = RCC_HSI_ON; | |
} | |
else | |
{ | |
RCC_OscInitStruct->HSIState = RCC_HSI_OFF; | |
} | |
RCC_OscInitStruct->HSICalibrationValue = (uint32_t)((RCC->CR &RCC_CR_HSITRIM) >> POSITION_VAL(RCC_CR_HSITRIM)); | |
/* Get the LSE configuration -----------------------------------------------*/ | |
if((RCC->BDCR &RCC_BDCR_LSEBYP) == RCC_BDCR_LSEBYP) | |
{ | |
RCC_OscInitStruct->LSEState = RCC_LSE_BYPASS; | |
} | |
else if((RCC->BDCR &RCC_BDCR_LSEON) == RCC_BDCR_LSEON) | |
{ | |
RCC_OscInitStruct->LSEState = RCC_LSE_ON; | |
} | |
else | |
{ | |
RCC_OscInitStruct->LSEState = RCC_LSE_OFF; | |
} | |
/* Get the LSI configuration -----------------------------------------------*/ | |
if((RCC->CSR &RCC_CSR_LSION) == RCC_CSR_LSION) | |
{ | |
RCC_OscInitStruct->LSIState = RCC_LSI_ON; | |
} | |
else | |
{ | |
RCC_OscInitStruct->LSIState = RCC_LSI_OFF; | |
} | |
/* Get the PLL configuration -----------------------------------------------*/ | |
if((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 = (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC); | |
RCC_OscInitStruct->PLL.PLLM = (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM); | |
RCC_OscInitStruct->PLL.PLLN = (uint32_t)((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)); | |
RCC_OscInitStruct->PLL.PLLP = (uint32_t)((((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) + RCC_PLLCFGR_PLLP_0) << 1U) >> POSITION_VAL(RCC_PLLCFGR_PLLP)); | |
RCC_OscInitStruct->PLL.PLLQ = (uint32_t)((RCC->PLLCFGR & RCC_PLLCFGR_PLLQ) >> POSITION_VAL(RCC_PLLCFGR_PLLQ)); | |
} | |
/** | |
* @brief Configures 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) | |
{ | |
/* 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 = (uint32_t)(RCC->CFGR & RCC_CFGR_SW); | |
/* Get the HCLK configuration ----------------------------------------------*/ | |
RCC_ClkInitStruct->AHBCLKDivider = (uint32_t)(RCC->CFGR & RCC_CFGR_HPRE); | |
/* Get the APB1 configuration ----------------------------------------------*/ | |
RCC_ClkInitStruct->APB1CLKDivider = (uint32_t)(RCC->CFGR & RCC_CFGR_PPRE1); | |
/* Get the APB2 configuration ----------------------------------------------*/ | |
RCC_ClkInitStruct->APB2CLKDivider = (uint32_t)((RCC->CFGR & RCC_CFGR_PPRE2) >> 3U); | |
/* Get the Flash Wait State (Latency) configuration ------------------------*/ | |
*pFLatency = (uint32_t)(FLASH->ACR & FLASH_ACR_LATENCY); | |
} | |
/** | |
* @brief This function handles the RCC CSS interrupt request. | |
* @note This API should be called under the NMI_Handler(). | |
* @retval None | |
*/ | |
void HAL_RCC_NMI_IRQHandler(void) | |
{ | |
/* Check RCC CSSF 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 could be implemented in the user file | |
*/ | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* HAL_RCC_MODULE_ENABLED */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |