Half-duplex mode function. More...

Collaboration diagram for Halfduplex mode function:

Functions
void	USART_AddressDetectionConfig (USART_TypeDef *USARTx, uint32_t USART_AddressLength)
	Configure the the USART Address detection length. More...

void	USART_HalfDuplexCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's Half Duplex communication. More...

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

void	USART_MuteModeWakeUpConfig (USART_TypeDef *USARTx, uint32_t USART_WakeUp)
	Selects the USART WakeUp method from mute mode. More...

void	USART_SetAddress (USART_TypeDef *USARTx, uint8_t USART_Address)
	Sets the address of the USART node. More...

Detailed Description

Half-duplex mode function.

Multi-Processor Communication functions.

 ===============================================================================
                    ##### Half-duplex mode function #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the USART 
    Half-duplex communication.
    [..]
    The USART can be configured to follow a single-wire half-duplex protocol where 
    the TX and RX lines are internally connected.
    [..]
    USART Half duplex communication is possible through the following procedure:
      (#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter 
          or Mode receiver and hardware flow control values using the USART_Init()
          function.
      (#) Configures the USART address using the USART_SetAddress() function.
      (#) Enable the USART using the USART_Cmd() function.
      (#) Enable the half duplex mode using USART_HalfDuplexCmd() function.


    -@- The RX pin is no longer used
    -@- In Half-duplex mode the following bits must be kept cleared:
      (+@) LINEN and CLKEN bits in the USART_CR2 register.
      (+@) SCEN and IREN bits in the USART_CR3 register.

 ===============================================================================
             ##### Multi-Processor Communication functions #####
 ===============================================================================
    [..] This subsection provides a set of functions allowing to manage the USART
         multiprocessor communication.
    [..] For instance one of the USARTs can be the master, its TX output is
         connected to the RX input of the other USART. The others are slaves,
         their respective TX outputs are logically ANDed together and connected 
         to the RX input of the master. USART multiprocessor communication is 
         possible through the following procedure:
         (#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity, 
             Mode transmitter or Mode receiver and hardware flow control values 
             using the USART_Init() function.
         (#) Configures the USART address using the USART_SetAddress() function.
         (#) Configures the wake up methode (USART_WakeUp_IdleLine or 
             USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only 
             for the slaves.
         (#) Enable the USART using the USART_Cmd() function.
         (#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd() 
             function.
    [..] The USART Slave exit from mute mode when receive the wake up condition.

Function Documentation

void USART_AddressDetectionConfig	(	USART_TypeDef *	USARTx,
		uint32_t	USART_AddressLength
	)

Configure the the USART Address detection length.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3 or UART4 or UART5.
USART_AddressLength	specifies the USART address length detection. This parameter can be one of the following values: USART_AddressLength_4b: 4-bit address length detection USART_AddressLength_7b: 7-bit address length detection

Return values

None

Definition at line 1048 of file stm32f30x_usart.c.

void USART_HalfDuplexCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the USART's Half Duplex communication.

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 Communication. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 836 of file stm32f4xx_usart.c.

void USART_MuteModeCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the USART's mute mode.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3 or UART4 or UART5.
NewState	new state of the USART mute mode. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1000 of file stm32f30x_usart.c.

void USART_MuteModeWakeUpConfig	(	USART_TypeDef *	USARTx,
		uint32_t	USART_WakeUp
	)

Selects the USART WakeUp method from mute mode.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3 or UART4 or UART5.
USART_WakeUp	specifies the USART wakeup method. This parameter can be one of the following values: USART_WakeUp_IdleLine: WakeUp by an idle line detection USART_WakeUp_AddressMark: WakeUp by an address mark

Return values

None

Definition at line 1028 of file stm32f30x_usart.c.

void USART_SetAddress	(	USART_TypeDef *	USARTx,
		uint8_t	USART_Address
	)

Sets the address of the USART node.

Parameters

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

Return values

None

Definition at line 981 of file stm32f30x_usart.c.

Functions

Detailed Description

Function Documentation