LIN mode functions. More...

Collaboration diagram for LIN mode functions:

Functions
void	USART_LINBreakDetectLengthConfig (USART_TypeDef *USARTx, uint16_t USART_LINBreakDetectLength)
	Sets the USART LIN Break detection length. More...

void	USART_LINCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's LIN mode. More...

uint16_t	USART_ReceiveData (USART_TypeDef *USARTx)
	Returns the most recent received data by the USARTx peripheral. More...

void	USART_SendBreak (USART_TypeDef *USARTx)
	Transmits break characters. More...

void	USART_SendData (USART_TypeDef *USARTx, uint16_t Data)
	Transmits single data through the USARTx peripheral. More...

Detailed Description

LIN mode functions.

Data transfers functions.

 ===============================================================================
                        ##### LIN mode functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the USART LIN 
    Mode communication.
    [..]
    In LIN mode, 8-bit data format with 1 stop bit is required in accordance with 
    the LIN standard.
    [..]
    Only this LIN Feature is supported by the USART IP:
      (+) LIN Master Synchronous Break send capability and LIN slave break detection
          capability :  13-bit break generation and 10/11 bit break detection

    [..]
    USART LIN Master transmitter communication is possible through the following 
    procedure:
      (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, 
        Mode transmitter or Mode receiver and hardware flow control values using 
        the USART_Init() function.
      (#) Enable the USART using the USART_Cmd() function.
      (#) Enable the LIN mode using the USART_LINCmd() function.
      (#) Send the break character using USART_SendBreak() function.
    [..]
    USART LIN Master receiver communication is possible through the following procedure:
      (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, 
          Mode transmitter or Mode receiver and hardware flow control values using 
          the USART_Init() function.
      (#) Enable the USART using the USART_Cmd() function.
      (#) Configures the break detection length using the USART_LINBreakDetectLengthConfig()
          function.
      (#) Enable the LIN mode using the USART_LINCmd() function.

      -@- In LIN mode, the following bits must be kept cleared:
       (+@) CLKEN in the USART_CR2 register,
       (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.

 ===============================================================================
                    ##### Data transfers functions #####
 ===============================================================================
    [..] This subsection provides a set of functions allowing to manage 
         the USART data transfers.
    [..] During an USART reception, data shifts in least significant bit first 
         through the RX pin. When a transmission is taking place, a write instruction to 
         the USART_TDR register stores the data in the shift register.
    [..] The read access of the USART_RDR register can be done using 
         the USART_ReceiveData() function and returns the RDR value.
         Whereas a write access to the USART_TDR can be done using USART_SendData()
         function and stores the written data into TDR.

Function Documentation

void USART_LINBreakDetectLengthConfig	(	USART_TypeDef *	USARTx,
		uint16_t	USART_LINBreakDetectLength
	)

Sets the USART LIN Break detection length.

Parameters

USARTx	where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.
USART_LINBreakDetectLength	specifies the LIN break detection length. This parameter can be one of the following values: USART_LINBreakDetectLength_10b: 10-bit break detection USART_LINBreakDetectLength_11b: 11-bit break detection

Return values

None

Definition at line 741 of file stm32f4xx_usart.c.

void USART_LINCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the USART's LIN mode.

Parameters

USARTx	where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.
NewState	new state of the USART LIN mode. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 759 of file stm32f4xx_usart.c.

uint16_t USART_ReceiveData ( USART_TypeDef * USARTx )

Returns the most recent received data by the USARTx peripheral.

Parameters

USARTx Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3 or UART4 or UART5.

Return values

The	received data.

Definition at line 931 of file stm32f30x_usart.c.

void USART_SendBreak ( USART_TypeDef * USARTx )

Transmits break characters.

Parameters

USARTx where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.

Return values

None

Definition at line 783 of file stm32f4xx_usart.c.

void USART_SendData	(	USART_TypeDef *	USARTx,
		uint16_t	Data
	)

Transmits single data through the USARTx peripheral.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3 or UART4 or UART5.
Data	the data to transmit.

Return values

None

Definition at line 915 of file stm32f30x_usart.c.

Functions

Detailed Description

Function Documentation