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ST STM32F31xx User Manual

ST STM32F31xx
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UM1581
Inter-integrated circuit interface (I2C)
DocID023800 Rev 1
251/584
The SMBus Host address (0b0001 000) is enabled by calling I2C_Init() function and
setting I2C_Mode member of I2C_InitTypeDef() structure to I2C_Mode_SMBusHost.
The Alert Response Address (0b0001 100) is enabled using I2C_SMBusAlertCmd()
function.
To detect cumulative SCL stretch in master and slave mode, TIMEOUTB should be
configured (in accordance to SMBus specification) using I2C_TimeoutBConfig() function
then I2C_ExtendedClockTimeoutCmd() function should be called to enable the detection.
SCL low timeout is detected by configuring TIMEOUTB using I2C_TimeoutBConfig()
function followed by the call of I2C_ClockTimeoutCmd(). When adding to this procedure
the call of I2C_IdleClockTimeoutCmd() function, Bus Idle condition (both SCL and SDA
high) is detected also.
ï‚· I2C_SMBusAlertCmd()
ï‚· I2C_ClockTimeoutCmd()
ï‚· I2C_ExtendedClockTimeoutCmd()
ï‚· I2C_IdleClockTimeoutCmd()
ï‚· I2C_TimeoutAConfig()
ï‚· I2C_TimeoutBConfig()
ï‚· I2C_CalculatePEC()
ï‚· I2C_PECRequestCmd()
ï‚· I2C_GetPEC()
13.2.5 I2C registers management functions
This section provides a functions that allow user the management of I2C registers.
ï‚· I2C_ReadRegister()
13.2.6 Data transfers management functions
This subsection provides a set of functions allowing to manage the I2C data transfers.
The read access of the I2C_RXDR register can be done using the I2C_ReceiveData()
function and returns the received value. Whereas a write access to the I2C_TXDR can be
done using I2C_SendData() function and stores the written data into TXDR.
ï‚· I2C_SendData()
ï‚· I2C_ReceiveData()
13.2.7 DMA transfers management functions
This section provides two functions that can be used only in DMA mode.
In DMA Mode, the I2C communication can be managed by 2 DMA Channel requests:
1. I2C_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
2. I2C_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
In this Mode it is advised to use the following function:
ï‚· I2C_DMACmd(I2C_TypeDef* I2Cx, uint32_t I2C_DMAReq, FunctionalState
NewState);
ï‚· I2C_DMACmd()

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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