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ST STM32F31xx User Manual

ST STM32F31xx
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Serial peripheral interface (SPI)
UM1581
410/584
DocID023800 Rev 1
1. SPI_I2S_FLAG_TXE : to indicate the status of the transmit buffer register.
2. SPI_I2S_FLAG_RXNE : to indicate the status of the receive buffer register.
3. SPI_I2S_FLAG_BSY : to indicate the state of the communication layer of the SPI.
4. SPI_FLAG_CRCERR : to indicate if a CRC Calculation error occur.
5. SPI_FLAG_MODF : to indicate if a Mode Fault error occur.
6. SPI_I2S_FLAG_OVR : to indicate if an Overrun error occur.
7. SPI_I2S_FLAG_FRE: to indicate a Frame Format error occurs.
8. I2S_FLAG_UDR: to indicate an Underrun error occurs.
9. I2S_FLAG_CHSIDE: to indicate Channel Side.
Do not use the BSY flag to handle each data transmission or reception. It is
better to use the TXE and RXNE flags instead.
In this Mode it is advised to use the following functions:
ï‚· FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG);
ï‚· void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG);
Interrupt Mode
In Interrupt Mode, the SPI/I2S communication can be managed by 3 interrupt sources and
5 pending bits:
Pending Bits:
1. SPI_I2S_IT_TXE : to indicate the status of the transmit buffer register.
2. SPI_I2S_IT_RXNE : to indicate the status of the receive buffer register.
3. SPI_I2S_IT_OVR : to indicate if an Overrun error occur.
4. I2S_IT_UDR : to indicate an Underrun Error occurs.
5. SPI_I2S_FLAG_FRE : to indicate a Frame Format error occurs.
Interrupt Source:
1. SPI_I2S_IT_TXE: specifies the interrupt source for the Tx buffer empty interrupt.
2. SPI_I2S_IT_RXNE : specifies the interrupt source for the Rx buffer not empty
interrupt.
3. SPI_I2S_IT_ERR : specifies the interrupt source for the errors interrupt.
In this Mode it is advised to use the following functions:
ï‚· void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState
NewState);
ï‚· ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT);
FIFO Status
It is possible to monitor the FIFO status when a transfer is ongoing using the following
function:
ï‚· uint32_t SPI_GetFIFOStatus(uint8_t SPI_FIFO_Direction);
DMA Mode
In DMA Mode, the SPI communication can be managed by 2 DMA Channel requests:
1. SPI_I2S_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
2. SPI_I2S_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
In this Mode it is advised to use the following function:

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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