Initialization and de-initialization functions

Functions
ErrorStatus	LL_I2S_DeInit (SPI_TypeDef *SPIx)
	De-initialize the SPI/I2S registers to their default reset values.
ErrorStatus	LL_I2S_Init (SPI_TypeDef *SPIx, LL_I2S_InitTypeDef *I2S_InitStruct)
	Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct.
void	LL_I2S_StructInit (LL_I2S_InitTypeDef *I2S_InitStruct)
	Set each LL_I2S_InitTypeDef field to default value.
void	LL_I2S_ConfigPrescaler (SPI_TypeDef *SPIx, uint32_t PrescalerLinear, uint32_t PrescalerParity)
	Set linear and parity prescaler.
ErrorStatus	LL_I2S_InitFullDuplex (SPI_TypeDef *I2Sxext, LL_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.

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Function Documentation

void LL_I2S_ConfigPrescaler	(	SPI_TypeDef *	SPIx,
		uint32_t	PrescalerLinear,
		uint32_t	PrescalerParity
	)

Set linear and parity prescaler.

Note:

To calculate value of PrescalerLinear(I2SDIV[7:0] bits) and PrescalerParity(ODD bit)
Check Audio frequency table and formulas inside Reference Manual (SPI/I2S).

Parameters:

SPIx	SPI Instance
PrescalerLinear	value Min_Data=0x02 and Max_Data=0xFF.
PrescalerParity	This parameter can be one of the following values: LL_I2S_PRESCALER_PARITY_EVEN LL_I2S_PRESCALER_PARITY_ODD

Return values:

None

Definition at line 529 of file stm32f4xx_ll_spi.c.

References assert_param, IS_LL_I2S_PRESCALER_LINEAR, and IS_LL_I2S_PRESCALER_PARITY.

ErrorStatus LL_I2S_DeInit

(

SPI_TypeDef *

SPIx

)

De-initialize the SPI/I2S registers to their default reset values.

Parameters:

SPIx	SPI Instance

Return values:

An	ErrorStatus enumeration value: SUCCESS: SPI registers are de-initialized ERROR: SPI registers are not de-initialized

Definition at line 385 of file stm32f4xx_ll_spi.c.

References LL_SPI_DeInit().

ErrorStatus LL_I2S_Init	(	SPI_TypeDef *	SPIx,
		LL_I2S_InitTypeDef *	I2S_InitStruct
	)

Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct.

Note:

As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0), SPI peripheral should be in disabled state prior calling this function. Otherwise, ERROR result will be returned.

Parameters:

SPIx	SPI Instance
I2S_InitStruct	pointer to a LL_I2S_InitTypeDef structure

Return values:

An	ErrorStatus enumeration value: SUCCESS: SPI registers are Initialized ERROR: SPI registers are not Initialized

Definition at line 400 of file stm32f4xx_ll_spi.c.

References assert_param, LL_I2S_InitTypeDef::AudioFreq, LL_I2S_InitTypeDef::ClockPolarity, LL_I2S_InitTypeDef::DataFormat, I2S_I2SCFGR_CLEAR_MASK, IS_LL_I2S_AUDIO_FREQ, IS_LL_I2S_CPOL, IS_LL_I2S_DATAFORMAT, IS_LL_I2S_MCLK_OUTPUT, IS_LL_I2S_MODE, IS_LL_I2S_STANDARD, LL_I2S_AUDIOFREQ_DEFAULT, LL_I2S_DATAFORMAT_16B, LL_I2S_IsEnabled(), LL_I2S_MCLK_OUTPUT_ENABLE, LL_RCC_GetI2SClockFreq(), LL_RCC_I2S1_CLKSOURCE, LL_I2S_InitTypeDef::MCLKOutput, LL_I2S_InitTypeDef::Mode, and LL_I2S_InitTypeDef::Standard.

ErrorStatus LL_I2S_InitFullDuplex	(	SPI_TypeDef *	I2Sxext,
		LL_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.

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 independently of the master configuration.

Parameters:

I2Sxext	SPI Instance
I2S_InitStruct	pointer to a LL_I2S_InitTypeDef structure

Return values:

An	ErrorStatus enumeration value: SUCCESS: I2Sxext registers are Initialized ERROR: I2Sxext registers are not Initialized

Definition at line 555 of file stm32f4xx_ll_spi.c.

References assert_param, LL_I2S_InitTypeDef::ClockPolarity, LL_I2S_InitTypeDef::DataFormat, I2S_I2SCFGR_CLEAR_MASK, I2S_I2SPR_CLEAR_MASK, IS_LL_I2S_CPOL, IS_LL_I2S_DATAFORMAT, IS_LL_I2S_MODE, IS_LL_I2S_STANDARD, LL_I2S_IsEnabled(), LL_I2S_MODE_MASTER_RX, LL_I2S_MODE_MASTER_TX, LL_I2S_MODE_SLAVE_RX, LL_I2S_MODE_SLAVE_TX, LL_I2S_InitTypeDef::Mode, and LL_I2S_InitTypeDef::Standard.

void LL_I2S_StructInit

(

LL_I2S_InitTypeDef *

I2S_InitStruct

)

Set each LL_I2S_InitTypeDef field to default value.

Parameters:

I2S_InitStruct

pointer to a LL_I2S_InitTypeDef structure whose fields will be set to default values.

Return values:

None

Definition at line 507 of file stm32f4xx_ll_spi.c.

References LL_I2S_InitTypeDef::AudioFreq, LL_I2S_InitTypeDef::ClockPolarity, LL_I2S_InitTypeDef::DataFormat, LL_I2S_AUDIOFREQ_DEFAULT, LL_I2S_DATAFORMAT_16B, LL_I2S_MCLK_OUTPUT_DISABLE, LL_I2S_MODE_SLAVE_TX, LL_I2S_POLARITY_LOW, LL_I2S_STANDARD_PHILIPS, LL_I2S_InitTypeDef::MCLKOutput, LL_I2S_InitTypeDef::Mode, and LL_I2S_InitTypeDef::Standard.