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ST STM32F31xx User Manual

ST STM32F31xx
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Reset and clock control (RCC)
UM1581
322/584
DocID023800 Rev 1
Function Name
void RCC_MCOConfig ( uint8_t RCC_MCOSource)
Function Description
Selects the clock source to output on MCO pin (PA8).
Parameters
ï‚· RCC_MCOSource : specifies the clock source to output.
This parameter can be one of the following values:
 RCC_MCOSource_NoClock : No clock selected.
 RCC_MCOSource_LSI : LSI oscillator clock selected.
 RCC_MCOSource_LSE : LSE oscillator clock selected.
 RCC_MCOSource_SYSCLK : System clock selected.
 RCC_MCOSource_HSI : HSI oscillator clock selected.
 RCC_MCOSource_HSE : HSE oscillator clock
selected.
 RCC_MCOSource_PLLCLK_Div2 : PLL clock
selected.
Return values
ï‚· None.
Notes
ï‚· PA8 should be configured in alternate function mode.
ï‚· The MCOF flag is set once the MCO clock source switch is
effective.
18.2.7 System AHB, APB1 and APB2 busses clocks configuration functions
18.2.7.1 RCC_SYSCLKConfig
Function Name
void RCC_SYSCLKConfig ( uint32_t RCC_SYSCLKSource)
Function Description
Configures the system clock (SYSCLK).
Parameters
ï‚· RCC_SYSCLKSource : specifies the clock source used as
system clock source This parameter can be one of the
following values:
 RCC_SYSCLKSource_HSI : HSI selected as system
clock source
 RCC_SYSCLKSource_HSE : HSE selected as system
clock source
 RCC_SYSCLKSource_PLLCLK : PLL selected as
system clock source
Return values
ï‚· None.
Notes
ï‚· 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).
ï‚· 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

Table of Contents

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ST STM32F31xx Specifications

General IconGeneral
BrandST
ModelSTM32F31xx
CategoryMicrocontrollers
LanguageEnglish

Summary

How to Use and Customize the Library

Library Configuration Parameters

Details configuration parameters that customize the library for specific applications via define statements.

Peripheral Initialization and Configuration

Step-by-step guide on how to initialize and configure a peripheral, including clock enabling.

Running Your First Example

Guides on loading and executing template examples, covering prerequisites and tool-specific steps.

Developing Your First Application

Outlines the typical starting point and steps for developing an application from scratch.

Analog-to-digital converter (ADC) Firmware Driver

ADC Firmware Driver API Description

Lists and describes the various functions available in the ADC library for peripheral control.

Controller Area Network (bxCAN) Firmware Driver

CAN Firmware Driver API Description

Lists and describes the various functions available in the CAN library for peripheral control.

Comparators (COMP) Firmware Driver

COMP Firmware Driver API Description

Lists and describes the various functions available in the COMP library for peripheral control.

CRC Calculation Unit (CRC) Firmware Driver

CRC Firmware Driver API Description

Lists and describes the various functions for CRC configuration and computation.

Digital-to-Analog Converter (DAC) Firmware Driver

DAC Firmware Driver API Description

Lists and describes the various functions for DAC peripheral control and data transfer.

DMA Controller (DMA) Firmware Driver

DMA Firmware Driver API Description

Lists and describes functions for DMA initialization, configuration, and data transfers.

External Interrupt/Event Controller (EXTI) Firmware Driver

EXTI Firmware Driver API Description

Lists and describes functions for EXTI features, usage, initialization, and interrupt management.

FLASH Memory (FLASH) Firmware Driver

FLASH Firmware Driver API Description

Lists and describes functions for FLASH interface configuration and memory programming.

General-purpose I/Os (GPIO) Firmware Driver

GPIO Firmware Driver API Description

Lists and describes functions for GPIO usage, initialization, read/write, and alternate functions.

Inter-integrated Circuit Interface (I2C) Firmware Driver

I2C Firmware Driver API Description

Lists and describes functions for I2C usage, initialization, communication, SMBUS, and registers management.

Independent Watchdog (IWDG) Firmware Driver

IWDG Firmware Driver API Description

Lists and describes functions for IWDG features, usage, prescaler, activation, and flag management.

Operational Amplifier (OPAMP) Firmware Driver

OPAMP Firmware Driver API Description

Lists and describes functions for OPAMP peripheral features, usage, and initialization.

Power Control (PWR) Firmware Driver

PWR Firmware Driver API Description

Lists and describes functions for backup domain access, PVD configuration, and low power modes.

Reset and Clock Control (RCC) Firmware Driver

RCC Firmware Driver API Description

Lists and describes functions for RCC features, clock configuration, and peripheral clocks.

Real-time Clock (RTC) Firmware Driver

RTC Firmware Driver API Description

Lists and describes functions for RTC operating conditions, domain access, and time/date configuration.

Serial Peripheral Interface (SPI) Firmware Driver

SPI Firmware Driver API Description

Lists and describes functions for SPI usage, initialization, data transfers, CRC calculation, and DMA.

System Configuration Controller (SYSCFG) Firmware Driver

SYSCFG Firmware Driver API Description

Lists and describes functions for SYSCFG usage, initialization, and configuration.

General-Purpose Timers (TIM) Firmware Driver

TIM Firmware Driver API Description

Lists and describes functions for TIM output compare, input capture, advanced control, and synchronization management.

Universal Synchronous Asynchronous Receiver Transmitter (USART) Firmware Driver

USART Firmware Driver API Description

Lists and describes functions for USART usage, initialization, RS485, DMA, interrupts, STOP mode, and AutoBaudRate.

Window Watchdog (WWDG) Firmware Driver

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