Functions
void	SPI_BiDirectionalLineConfig (SPI_Direction_TypeDef SPI_Direction)
	Selects the data transfer direction in bi-directional mode.
void	SPI_CalculateCRCCmd (FunctionalState NewState)
	Enables or disables the CRC value calculation of the transferred bytes.
void	SPI_ClearFlag (SPI_Flag_TypeDef SPI_FLAG)
	Clears the SPI flags.
void	SPI_ClearITPendingBit (SPI_IT_TypeDef SPI_IT)
	Clears the interrupt pending bits.
void	SPI_Cmd (FunctionalState NewState)
	Enables or disables the SPI peripheral.
void	SPI_DeInit (void)
	Deinitializes the SPI peripheral registers to their default reset values.
uint8_t	SPI_GetCRC (SPI_CRC_TypeDef SPI_CRC)
	Returns the transmit or the receive CRC register value.
uint8_t	SPI_GetCRCPolynomial (void)
	Returns the CRC Polynomial register value.
FlagStatus	SPI_GetFlagStatus (SPI_Flag_TypeDef SPI_FLAG)
	Checks whether the specified SPI flag is set or not.
ITStatus	SPI_GetITStatus (SPI_IT_TypeDef SPI_IT)
	Checks whether the specified interrupt has occurred or not.
void	SPI_Init (SPI_FirstBit_TypeDef FirstBit, SPI_BaudRatePrescaler_TypeDef BaudRatePrescaler, SPI_Mode_TypeDef Mode, SPI_ClockPolarity_TypeDef ClockPolarity, SPI_ClockPhase_TypeDef ClockPhase, SPI_DataDirection_TypeDef Data_Direction, SPI_NSS_TypeDef Slave_Management, uint8_t CRCPolynomial)
	Initializes the SPI according to the specified parameters.
void	SPI_ITConfig (SPI_IT_TypeDef SPI_IT, FunctionalState NewState)
	Enables or disables the specified interrupts.
void	SPI_NSSInternalSoftwareCmd (FunctionalState NewState)
	Configures internally by software the NSS pin.
uint8_t	SPI_ReceiveData (void)
	Returns the most recent received data by the SPI peripheral.
void	SPI_ResetCRC (void)
	Reset the Rx CRCR and Tx CRCR registers.
void	SPI_SendData (uint8_t Data)
	Transmits a Data through the SPI peripheral.
void	SPI_TransmitCRC (void)
	Enables the transmit of the CRC value.

Function Documentation

void SPI_BiDirectionalLineConfig ( SPI_Direction_TypeDef SPI_Direction )

Selects the data transfer direction in bi-directional mode.

Parameters:

SPI_Direction Specifies the data transfer direction in bi-directional mode.

Return values:

None

Definition at line 288 of file stm8s_spi.c.

References IS_SPI_DIRECTION_OK, SPI, SPI_CR2_BDOE, and SPI_DIRECTION_RX.

void SPI_CalculateCRCCmd ( FunctionalState NewState )

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

Parameters:

NewState Indicates the new state of the SPI CRC value calculation. This parameter can be: ENABLE or DISABLE.

Return values:

None

Definition at line 218 of file stm8s_spi.c.

References DISABLE, IS_FUNCTIONALSTATE_OK, SPI, and SPI_CR2_CRCEN.

Referenced by SPI_ResetCRC().

void SPI_ClearFlag ( SPI_Flag_TypeDef SPI_FLAG )

Clears the SPI flags.

Parameters:

SPI_FLAG

: Specifies the flag to clear. This parameter can be one of the following values:

SPI_FLAG_CRCERR
SPI_FLAG_WKUP

Note:

- OVR (OverRun Error) interrupt pending bit is cleared by software sequence: a read operation to SPI_DR register (SPI_ReceiveData()) followed by a read operation to SPI_SR register (SPI_GetFlagStatus()).

MODF (Mode Fault) interrupt pending bit is cleared by software sequence: a read/write operation to SPI_SR register (SPI_GetFlagStatus()) followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI).

Return values:

None

Definition at line 346 of file stm8s_spi.c.

References IS_SPI_CLEAR_FLAGS_OK, and SPI.

void SPI_ClearITPendingBit ( SPI_IT_TypeDef SPI_IT )

Clears the interrupt pending bits.

Parameters:

SPI_IT,:

Specifies the interrupt pending bit to clear. This parameter can be one of the following values:

SPI_IT_CRCERR
SPI_IT_WKUP

Note:

- OVR (OverRun Error) interrupt pending bit is cleared by software sequence: a read operation to SPI_DR register (SPI_ReceiveData()) followed by a read operation to SPI_SR register (SPI_GetITStatus()).

MODF (Mode Fault) interrupt pending bit is cleared by software sequence: a read/write operation to SPI_SR register (SPI_GetITStatus()) followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI).

Return values:

None

Definition at line 412 of file stm8s_spi.c.

References IS_SPI_CLEAR_IT_OK, and SPI.

void SPI_Cmd ( FunctionalState NewState )

Enables or disables the SPI peripheral.

Parameters:

NewState New state of the SPI peripheral. This parameter can be: ENABLE or DISABLE

Return values:

None

Definition at line 119 of file stm8s_spi.c.

References DISABLE, IS_FUNCTIONALSTATE_OK, SPI, and SPI_CR1_SPE.

Referenced by SPI_ResetCRC().

void SPI_DeInit ( void )

Deinitializes the SPI peripheral registers to their default reset values.

Parameters:

None

Return values:

None

Definition at line 50 of file stm8s_spi.c.

References SPI, SPI_CR1_RESET_VALUE, SPI_CR2_RESET_VALUE, SPI_CRCPR_RESET_VALUE, SPI_ICR_RESET_VALUE, and SPI_SR_RESET_VALUE.

uint8_t SPI_GetCRC ( SPI_CRC_TypeDef SPI_CRC )

Returns the transmit or the receive CRC register value.

Parameters:

SPI_CRC Specifies the CRC register to be read.

Return values:

The	selected CRC register value.

Definition at line 238 of file stm8s_spi.c.

References IS_SPI_CRC_OK, SPI, and SPI_CRC_RX.

uint8_t SPI_GetCRCPolynomial ( void )

Returns the CRC Polynomial register value.

Parameters:

None

Return values:

The	CRC Polynomial register value.

Definition at line 278 of file stm8s_spi.c.

References SPI.

FlagStatus SPI_GetFlagStatus ( SPI_Flag_TypeDef SPI_FLAG )

Checks whether the specified SPI flag is set or not.

Parameters:

SPI_FLAG : Specifies the flag to check. This parameter can be any of the SPI_Flag_TypeDef enumeration.

Return values:

FlagStatus : Indicates the state of SPI_FLAG. This parameter can be any of the FlagStatus enumeration.

Definition at line 311 of file stm8s_spi.c.

References IS_SPI_FLAGS_OK, RESET, SET, and SPI.

ITStatus SPI_GetITStatus ( SPI_IT_TypeDef SPI_IT )

Checks whether the specified interrupt has occurred or not.

Parameters:

SPI_IT,:

Specifies the SPI interrupt pending bit to check. This parameter can be one of the following values:

SPI_IT_CRCERR
SPI_IT_WKUP
SPI_IT_OVR
SPI_IT_MODF
SPI_IT_RXNE
SPI_IT_TXE

Return values:

ITStatus : Indicates the state of the SPI_IT. This parameter can be any of the ITStatus enumeration.

Definition at line 366 of file stm8s_spi.c.

References IS_SPI_GET_IT_OK, RESET, SET, and SPI.

void SPI_Init	(	SPI_FirstBit_TypeDef	FirstBit,
		SPI_BaudRatePrescaler_TypeDef	BaudRatePrescaler,
		SPI_Mode_TypeDef	Mode,
		SPI_ClockPolarity_TypeDef	ClockPolarity,
		SPI_ClockPhase_TypeDef	ClockPhase,
		SPI_DataDirection_TypeDef	Data_Direction,
		SPI_NSS_TypeDef	Slave_Management,
		uint8_t	CRCPolynomial
	)

Initializes the SPI according to the specified parameters.

Parameters:

FirstBit	: This parameter can be any of the SPI_FirstBit_TypeDef enumeration.
BaudRatePrescaler	: This parameter can be any of the SPI_BaudRatePrescaler_TypeDef enumeration.
Mode	: This parameter can be any of the SPI_Mode_TypeDef enumeration.
ClockPolarity	: This parameter can be any of the SPI_ClockPolarity_TypeDef enumeration.
ClockPhase	: This parameter can be any of the SPI_ClockPhase_TypeDef enumeration.
Data_Direction	: This parameter can be any of the SPI_DataDirection_TypeDef enumeration.
Slave_Management	: This parameter can be any of the SPI_NSS_TypeDef enumeration.
CRCPolynomial	: Configures the CRC polynomial.

Return values:

None

Definition at line 78 of file stm8s_spi.c.

References IS_SPI_BAUDRATE_PRESCALER_OK, IS_SPI_CRC_POLYNOMIAL_OK, IS_SPI_DATA_DIRECTION_OK, IS_SPI_FIRSTBIT_OK, IS_SPI_MODE_OK, IS_SPI_PHASE_OK, IS_SPI_POLARITY_OK, IS_SPI_SLAVEMANAGEMENT_OK, SPI, SPI_CR2_SSI, and SPI_MODE_MASTER.

void SPI_ITConfig	(	SPI_IT_TypeDef	SPI_IT,
		FunctionalState	NewState
	)

Enables or disables the specified interrupts.

Parameters:

SPI_IT	Specifies the SPI interrupts sources to be enabled or disabled.
NewState,:	The new state of the specified SPI interrupts. This parameter can be: ENABLE or DISABLE.

Return values:

None

Definition at line 141 of file stm8s_spi.c.

References DISABLE, IS_FUNCTIONALSTATE_OK, IS_SPI_CONFIG_IT_OK, and SPI.

void SPI_NSSInternalSoftwareCmd ( FunctionalState NewState )

Configures internally by software the NSS pin.

Parameters:

NewState Indicates the new state of the SPI Software slave management. This parameter can be: ENABLE or DISABLE.

Return values:

None

Definition at line 187 of file stm8s_spi.c.

References DISABLE, IS_FUNCTIONALSTATE_OK, SPI, and SPI_CR2_SSI.

uint8_t SPI_ReceiveData ( void )

Returns the most recent received data by the SPI peripheral.

Parameters:

None

Return values:

The	value of the received data.

Definition at line 176 of file stm8s_spi.c.

References SPI.

void SPI_ResetCRC ( void )

Reset the Rx CRCR and Tx CRCR registers.

Parameters:

None

Return values:

None

Definition at line 263 of file stm8s_spi.c.

References ENABLE, SPI_CalculateCRCCmd(), and SPI_Cmd().

void SPI_SendData ( uint8_t Data )

Transmits a Data through the SPI peripheral.

Parameters:

Data	: Byte to be transmitted.

Return values:

None

Definition at line 166 of file stm8s_spi.c.

References SPI.

void SPI_TransmitCRC ( void )

Enables the transmit of the CRC value.

Parameters:

None

Return values:

None

Definition at line 207 of file stm8s_spi.c.

References SPI, and SPI_CR2_CRCNEXT.

STM8S/A Standard Peripherals Drivers: SPI_Exported_Functions

STM8S/A

Functions

Function Documentation

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