SPI driver modules. More...

Modules
	SPI_Exported_Constants

	SPI_Private_Functions

Data Structures
struct	SPI_InitTypeDef
	SPI Init structure definition. More...

struct	I2S_InitTypeDef
	I2S Init structure definition. More...

Macros
#define	CR1_CLEAR_MASK ((uint16_t)0x3040)

#define	I2SCFGR_CLEAR_MASK ((uint16_t)0xF040)

#define	PLLCFGR_PPLR_MASK ((uint32_t)0x70000000)

#define	PLLCFGR_PPLN_MASK ((uint32_t)0x00007FC0)

#define	SPI_CR2_FRF ((uint16_t)0x0010)

#define	SPI_SR_TIFRFE ((uint16_t)0x0100)

Functions
void	SPI_I2S_DeInit (SPI_TypeDef *SPIx)
	Deinitialize the SPIx peripheral registers to their default reset values. More...

void	SPI_Init (SPI_TypeDef SPIx, SPI_InitTypeDef SPI_InitStruct)
	Initializes the SPIx peripheral according to the specified parameters in the SPI_InitStruct. More...

void	I2S_Init (SPI_TypeDef SPIx, I2S_InitTypeDef I2S_InitStruct)
	Initializes the SPIx peripheral according to the specified parameters in the I2S_InitStruct. More...

void	SPI_StructInit (SPI_InitTypeDef *SPI_InitStruct)
	Fills each SPI_InitStruct member with its default value. More...

void	I2S_StructInit (I2S_InitTypeDef *I2S_InitStruct)
	Fills each I2S_InitStruct member with its default value. More...

void	SPI_Cmd (SPI_TypeDef *SPIx, FunctionalState NewState)
	Enables or disables the specified SPI peripheral. More...

void	I2S_Cmd (SPI_TypeDef *SPIx, FunctionalState NewState)
	Enables or disables the specified SPI peripheral (in I2S mode). More...

void	SPI_DataSizeConfig (SPI_TypeDef *SPIx, uint16_t SPI_DataSize)
	Configures the data size for the selected SPI. More...

void	SPI_BiDirectionalLineConfig (SPI_TypeDef *SPIx, uint16_t SPI_Direction)
	Selects the data transfer direction in bidirectional mode for the specified SPI. More...

void	SPI_NSSInternalSoftwareConfig (SPI_TypeDef *SPIx, uint16_t SPI_NSSInternalSoft)
	Configures internally by software the NSS pin for the selected SPI. More...

void	SPI_SSOutputCmd (SPI_TypeDef *SPIx, FunctionalState NewState)
	Enables or disables the SS output for the selected SPI. More...

void	SPI_TIModeCmd (SPI_TypeDef *SPIx, FunctionalState NewState)
	Enables or disables the SPIx/I2Sx DMA interface. More...

void	I2S_FullDuplexConfig (SPI_TypeDef I2Sxext, I2S_InitTypeDef I2S_InitStruct)
	Configures the full duplex mode for the I2Sx peripheral using its extension I2Sxext according to the specified parameters in the I2S_InitStruct. More...

void	SPI_I2S_SendData (SPI_TypeDef *SPIx, uint16_t Data)
	Transmits a Data through the SPIx/I2Sx peripheral. More...

uint16_t	SPI_I2S_ReceiveData (SPI_TypeDef *SPIx)
	Returns the most recent received data by the SPIx/I2Sx peripheral. More...

void	SPI_CalculateCRC (SPI_TypeDef *SPIx, FunctionalState NewState)
	Enables or disables the CRC value calculation of the transferred bytes. More...

void	SPI_TransmitCRC (SPI_TypeDef *SPIx)
	Transmit the SPIx CRC value. More...

uint16_t	SPI_GetCRC (SPI_TypeDef *SPIx, uint8_t SPI_CRC)
	Returns the transmit or the receive CRC register value for the specified SPI. More...

uint16_t	SPI_GetCRCPolynomial (SPI_TypeDef *SPIx)
	Returns the CRC Polynomial register value for the specified SPI. More...

void	SPI_I2S_DMACmd (SPI_TypeDef *SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState)
	Enables or disables the SPIx/I2Sx DMA interface. More...

void	SPI_I2S_ITConfig (SPI_TypeDef *SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState)
	Enables or disables the specified SPI/I2S interrupts. More...

FlagStatus	SPI_I2S_GetFlagStatus (SPI_TypeDef *SPIx, uint16_t SPI_I2S_FLAG)
	Checks whether the specified SPIx/I2Sx flag is set or not. More...

void	SPI_I2S_ClearFlag (SPI_TypeDef *SPIx, uint16_t SPI_I2S_FLAG)
	Clears the SPIx CRC Error (CRCERR) flag. More...

ITStatus	SPI_I2S_GetITStatus (SPI_TypeDef *SPIx, uint8_t SPI_I2S_IT)
	Checks whether the specified SPIx/I2Sx interrupt has occurred or not. More...

void	SPI_I2S_ClearITPendingBit (SPI_TypeDef *SPIx, uint8_t SPI_I2S_IT)
	Clears the SPIx CRC Error (CRCERR) interrupt pending bit. More...

Detailed Description

SPI driver modules.

Function Documentation

void I2S_Cmd	(	SPI_TypeDef *	SPIx,
		FunctionalState	NewState
	)

Enables or disables the specified SPI peripheral (in I2S mode).

Parameters

SPIx,:	where x can be 2 or 3 to select the SPI peripheral (or I2Sxext for full duplex mode).
NewState,:	new state of the SPIx peripheral. This parameter can be: ENABLE or DISABLE.

Return values

None

void I2S_FullDuplexConfig	(	SPI_TypeDef *	I2Sxext,
		I2S_InitTypeDef *	I2S_InitStruct
	)

Configures the full duplex mode for the I2Sx peripheral using its extension I2Sxext according to the specified parameters in the I2S_InitStruct.

Parameters

I2Sxext,:	where x can be 2 or 3 to select the I2S peripheral extension block.
I2S_InitStruct,:	pointer to an I2S_InitTypeDef structure that contains the configuration information for the specified I2S peripheral extension.

Note: The structure pointed by I2S_InitStruct parameter should be the same used for the master I2S peripheral. In this case, if the master is configured as transmitter, the slave will be receiver and vice versa. Or you can force a different mode by modifying the field I2S_Mode to the value I2S_SlaveRx or I2S_SlaveTx indepedently of the master configuration.; The I2S full duplex extension can be configured in slave mode only.

Return values

None

void I2S_Init	(	SPI_TypeDef *	SPIx,
		I2S_InitTypeDef *	I2S_InitStruct
	)

Initializes the SPIx peripheral according to the specified parameters in the I2S_InitStruct.

Parameters

SPIx,:	where x can be 2 or 3 to select the SPI peripheral (configured in I2S mode).
I2S_InitStruct,:	pointer to an I2S_InitTypeDef structure that contains the configuration information for the specified SPI peripheral configured in I2S mode.

Note: The function calculates the optimal prescaler needed to obtain the most accurate audio frequency (depending on the I2S clock source, the PLL values and the product configuration). But in case the prescaler value is greater than 511, the default value (0x02) will be configured instead.; if an external clock is used as source clock for the I2S, then the define I2S_EXTERNAL_CLOCK_VAL in file stm32f4xx_conf.h should be enabled and set to the value of the the source clock frequency (in Hz).

Return values

None

void I2S_StructInit ( I2S_InitTypeDef * I2S_InitStruct )

Fills each I2S_InitStruct member with its default value.

Parameters

I2S_InitStruct,: pointer to a I2S_InitTypeDef structure which will be initialized.

Return values

None

void SPI_BiDirectionalLineConfig	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_Direction
	)

Selects the data transfer direction in bidirectional mode for the specified SPI.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
SPI_Direction,:	specifies the data transfer direction in bidirectional mode. This parameter can be one of the following values: SPI_Direction_Tx: Selects Tx transmission direction SPI_Direction_Rx: Selects Rx receive direction

Return values

None

void SPI_CalculateCRC	(	SPI_TypeDef *	SPIx,
		FunctionalState	NewState
	)

Enables or disables the CRC value calculation of the transferred bytes.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
NewState,:	new state of the SPIx CRC value calculation. This parameter can be: ENABLE or DISABLE.

Return values

None

void SPI_Cmd	(	SPI_TypeDef *	SPIx,
		FunctionalState	NewState
	)

Enables or disables the specified SPI peripheral.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
NewState,:	new state of the SPIx peripheral. This parameter can be: ENABLE or DISABLE.

Return values

None

void SPI_DataSizeConfig	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_DataSize
	)

Configures the data size for the selected SPI.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
SPI_DataSize,:	specifies the SPI data size. This parameter can be one of the following values: SPI_DataSize_16b: Set data frame format to 16bit SPI_DataSize_8b: Set data frame format to 8bit

Return values

None

uint16_t SPI_GetCRC	(	SPI_TypeDef *	SPIx,
		uint8_t	SPI_CRC
	)

Returns the transmit or the receive CRC register value for the specified SPI.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
SPI_CRC,:	specifies the CRC register to be read. This parameter can be one of the following values: SPI_CRC_Tx: Selects Tx CRC register SPI_CRC_Rx: Selects Rx CRC register

Return values

The	selected CRC register value..

uint16_t SPI_GetCRCPolynomial ( SPI_TypeDef * SPIx )

Returns the CRC Polynomial register value for the specified SPI.

Parameters

SPIx,: where x can be 1, 2 or 3 to select the SPI peripheral.

Return values

The	CRC Polynomial register value.

void SPI_I2S_ClearFlag	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_I2S_FLAG
	)

Clears the SPIx CRC Error (CRCERR) flag.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_FLAG,:	specifies the SPI flag to clear. This function clears only CRCERR flag. SPI_FLAG_CRCERR: CRC Error flag.

Note: OVR (OverRun error) flag is cleared by software sequence: a read operation to SPI_DR register (SPI_I2S_ReceiveData()) followed by a read operation to SPI_SR register (SPI_I2S_GetFlagStatus()).; UDR (UnderRun error) flag is cleared by a read operation to SPI_SR register (SPI_I2S_GetFlagStatus()).; MODF (Mode Fault) flag is cleared by software sequence: a read/write operation to SPI_SR register (SPI_I2S_GetFlagStatus()) followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI).

Return values

None

void SPI_I2S_ClearITPendingBit	(	SPI_TypeDef *	SPIx,
		uint8_t	SPI_I2S_IT
	)

Clears the SPIx CRC Error (CRCERR) interrupt pending bit.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_IT,:	specifies the SPI interrupt pending bit to clear. This function clears only CRCERR interrupt pending bit. SPI_IT_CRCERR: CRC Error interrupt.

Note: OVR (OverRun Error) interrupt pending bit is cleared by software sequence: a read operation to SPI_DR register (SPI_I2S_ReceiveData()) followed by a read operation to SPI_SR register (SPI_I2S_GetITStatus()).; UDR (UnderRun Error) interrupt pending bit is cleared by a read operation to SPI_SR register (SPI_I2S_GetITStatus()).; MODF (Mode Fault) interrupt pending bit is cleared by software sequence: a read/write operation to SPI_SR register (SPI_I2S_GetITStatus()) followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI).

Return values

None

void SPI_I2S_DeInit ( SPI_TypeDef * SPIx )

Deinitialize the SPIx peripheral registers to their default reset values.

Parameters

SPIx,: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode.

Note: The extended I2S blocks (ie. I2S2ext and I2S3ext blocks) are deinitialized when the relative I2S peripheral is deinitialized (the extended block's clock is managed by the I2S peripheral clock).

Return values

None

void SPI_I2S_DMACmd	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_I2S_DMAReq,
		FunctionalState	NewState
	)

Enables or disables the SPIx/I2Sx DMA interface.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_DMAReq,:	specifies the SPI DMA transfer request to be enabled or disabled. This parameter can be any combination of the following values: SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
NewState,:	new state of the selected SPI DMA transfer request. This parameter can be: ENABLE or DISABLE.

Return values

None

FlagStatus SPI_I2S_GetFlagStatus	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_I2S_FLAG
	)

Checks whether the specified SPIx/I2Sx flag is set or not.

Parameters

SPIx,: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.

SPI_I2S_FLAG,:

specifies the SPI flag to check. This parameter can be one of the following values:

SPI_I2S_FLAG_TXE: Transmit buffer empty flag.
SPI_I2S_FLAG_RXNE: Receive buffer not empty flag.
SPI_I2S_FLAG_BSY: Busy flag.
SPI_I2S_FLAG_OVR: Overrun flag.
SPI_FLAG_MODF: Mode Fault flag.
SPI_FLAG_CRCERR: CRC Error flag.
SPI_I2S_FLAG_TIFRFE: Format Error.
I2S_FLAG_UDR: Underrun Error flag.
I2S_FLAG_CHSIDE: Channel Side flag.

Return values

The	new state of SPI_I2S_FLAG (SET or RESET).

ITStatus SPI_I2S_GetITStatus	(	SPI_TypeDef *	SPIx,
		uint8_t	SPI_I2S_IT
	)

Checks whether the specified SPIx/I2Sx interrupt has occurred or not.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_IT,:	specifies the SPI interrupt source to check. This parameter can be one of the following values: SPI_I2S_IT_TXE: Transmit buffer empty interrupt. SPI_I2S_IT_RXNE: Receive buffer not empty interrupt. SPI_I2S_IT_OVR: Overrun interrupt. SPI_IT_MODF: Mode Fault interrupt. SPI_IT_CRCERR: CRC Error interrupt. I2S_IT_UDR: Underrun interrupt. SPI_I2S_IT_TIFRFE: Format Error interrupt.

Return values

The	new state of SPI_I2S_IT (SET or RESET).

void SPI_I2S_ITConfig	(	SPI_TypeDef *	SPIx,
		uint8_t	SPI_I2S_IT,
		FunctionalState	NewState
	)

Enables or disables the specified SPI/I2S interrupts.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_IT,:	specifies the SPI interrupt source to be enabled or disabled. This parameter can be one of the following values: SPI_I2S_IT_TXE: Tx buffer empty interrupt mask SPI_I2S_IT_RXNE: Rx buffer not empty interrupt mask SPI_I2S_IT_ERR: Error interrupt mask
NewState,:	new state of the specified SPI interrupt. This parameter can be: ENABLE or DISABLE.

Return values

None

uint16_t SPI_I2S_ReceiveData ( SPI_TypeDef * SPIx )

Returns the most recent received data by the SPIx/I2Sx peripheral.

Parameters

SPIx,: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.

Return values

The	value of the received data.

void SPI_I2S_SendData	(	SPI_TypeDef *	SPIx,
		uint16_t	Data
	)

Transmits a Data through the SPIx/I2Sx peripheral.

Parameters

SPIx,:	To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
Data,:	Data to be transmitted.

Return values

None

void SPI_Init	(	SPI_TypeDef *	SPIx,
		SPI_InitTypeDef *	SPI_InitStruct
	)

Initializes the SPIx peripheral according to the specified parameters in the SPI_InitStruct.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
SPI_InitStruct,:	pointer to a SPI_InitTypeDef structure that contains the configuration information for the specified SPI peripheral.

Return values

None

void SPI_NSSInternalSoftwareConfig	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_NSSInternalSoft
	)

Configures internally by software the NSS pin for the selected SPI.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
SPI_NSSInternalSoft,:	specifies the SPI NSS internal state. This parameter can be one of the following values: SPI_NSSInternalSoft_Set: Set NSS pin internally SPI_NSSInternalSoft_Reset: Reset NSS pin internally

Return values

None

void SPI_SSOutputCmd	(	SPI_TypeDef *	SPIx,
		FunctionalState	NewState
	)

Enables or disables the SS output for the selected SPI.

Parameters

SPIx,:	where x can be 1, 2 or 3 to select the SPI peripheral.
NewState,:	new state of the SPIx SS output. This parameter can be: ENABLE or DISABLE.

Return values

None

void SPI_StructInit ( SPI_InitTypeDef * SPI_InitStruct )

Fills each SPI_InitStruct member with its default value.

Parameters

SPI_InitStruct,: pointer to a SPI_InitTypeDef structure which will be initialized.

Return values

None

void SPI_TIModeCmd	(	SPI_TypeDef *	SPIx,
		FunctionalState	NewState
	)

Enables or disables the SPIx/I2Sx DMA interface.

Note: This function can be called only after the SPI_Init() function has been called.; When TI mode is selected, the control bits SSM, SSI, CPOL and CPHA are not taken into consideration and are configured by hardware respectively to the TI mode requirements.

Parameters

SPIx,:	where x can be 1, 2 or 3
NewState,:	new state of the selected SPI TI communication mode. This parameter can be: ENABLE or DISABLE.

Return values

None

void SPI_TransmitCRC ( SPI_TypeDef * SPIx )

Transmit the SPIx CRC value.

Parameters

SPIx,: where x can be 1, 2 or 3 to select the SPI peripheral.

Return values

None

Modules

Data Structures

Macros

Functions

Detailed Description

Function Documentation