Initialization and Configuration functions

Initialization and Configuration functions. More...

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...

Detailed Description

Initialization and Configuration functions.

 ===============================================================================
                  Initialization and Configuration functions
 ===============================================================================  

  This section provides a set of functions allowing to initialize the SPI Direction,
  SPI Mode, SPI Data Size, SPI Polarity, SPI Phase, SPI NSS Management, SPI Baud
  Rate Prescaler, SPI First Bit and SPI CRC Polynomial.
  
  The SPI_Init() function follows the SPI configuration procedures for Master mode
  and Slave mode (details for these procedures are available in reference manual
  (RM0033)).

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.
NewState,:	new state of the SPIx peripheral. This parameter can be: ENABLE or DISABLE.

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 stm32f2xx_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_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

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.

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