Multi-Processor Communication functions. More...

Collaboration diagram for MultiProcessor Communication functions:

Functions
void	USART_AutoBaudRateCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the Auto Baud Rate. More...

void	USART_AutoBaudRateConfig (USART_TypeDef *USARTx, uint32_t USART_AutoBaudRate)
	Selects the USART auto baud rate method. More...

void	USART_ReceiverWakeUpCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Determines if the USART is in mute mode or not. More...

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

void	USART_WakeUpConfig (USART_TypeDef *USARTx, uint16_t USART_WakeUp)
	Selects the USART WakeUp method. More...

Detailed Description

Multi-Processor Communication functions.

AutoBaudRate functions.

 ===============================================================================
              ##### 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 method (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.

 ===============================================================================
                       ##### AutoBaudRate functions #####
 ===============================================================================
    [..] This subsection provides a set of functions allowing to manage 
         the AutoBaudRate detections.
         
    [..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd ()
         The character patterns used to calculate baudrate must be chosen by calling 
         USART_AutoBaudRateConfig() function. These function take as parameter :
        (#)USART_AutoBaudRate_StartBit : any character starting with a bit 1.
        (#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern. 
                          
    [..] At any later time, another request for AutoBaudRate detection can be performed
         using USART_RequestCmd() function.
         
    [..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate
         that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag
         indicate that this procedure is completed without success. USART_GetFlagStatus () 
         function should be used to monitor the status of these flags.

Function Documentation

void USART_AutoBaudRateCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the Auto Baud Rate.

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 USARTx auto baud rate. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 838 of file stm32f30x_usart.c.

void USART_AutoBaudRateConfig	(	USART_TypeDef *	USARTx,
		uint32_t	USART_AutoBaudRate
	)

Selects the USART auto baud rate method.

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_AutoBaudRate	specifies the selected USART auto baud rate method. This parameter can be one of the following values: USART_AutoBaudRate_StartBit: Start Bit duration measurement. USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement. USART_AutoBaudRate_0x7FFrame: 0x7F frame. USART_AutoBaudRate_0x55Frame: 0x55 frame.

Note: This function has to be called before calling USART_Cmd() function.

Return values

None

Definition at line 872 of file stm32f30x_usart.c.

void USART_ReceiverWakeUpCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Determines if the USART is in mute mode or not.

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 mute mode. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 645 of file stm32f4xx_usart.c.

void USART_SetAddress	(	USART_TypeDef *	USARTx,
		uint8_t	USART_Address
	)

Sets the address of the USART node.

Parameters

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

Return values

None

Definition at line 625 of file stm32f4xx_usart.c.

void USART_WakeUpConfig	(	USART_TypeDef *	USARTx,
		uint16_t	USART_WakeUp
	)

Selects the USART WakeUp method.

Parameters

USARTx	where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.
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 672 of file stm32f4xx_usart.c.

Functions

Detailed Description

Function Documentation