IrDA mode functions

IrDA mode functions. More...

Collaboration diagram for IrDA mode functions:

Functions
void	USART_IrDAConfig (USART_TypeDef *USARTx, uint16_t USART_IrDAMode)
	Configures the USART's IrDA interface. More...
void	USART_IrDACmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's IrDA interface. More...

Detailed Description

IrDA mode functions.

 ===============================================================================
                        ##### IrDA mode functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the USART 
    IrDA communication.
    [..]
    IrDA is a half duplex communication protocol. If the Transmitter is busy, any data
    on the IrDA receive line will be ignored by the IrDA decoder and if the Receiver 
    is busy, data on the TX from the USART to IrDA will not be encoded by IrDA.
    While receiving data, transmission should be avoided as the data to be transmitted
    could be corrupted.
    [..]
    IrDA communication is possible through the following procedure:
      (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity, Transmitter/Receiver 
          modes and hardware flow control values using the USART_Init() function.
      (#) Enable the USART using the USART_Cmd() function.
      (#) Configures the IrDA pulse width by configuring the prescaler using  
          the USART_SetPrescaler() function.
      (#) Configures the IrDA  USART_IrDAMode_LowPower or USART_IrDAMode_Normal mode
          using the USART_IrDAConfig() function.
      (#) Enable the IrDA using the USART_IrDACmd() function.

      -@- A pulse of width less than two and greater than one PSC period(s) may or may
          not be rejected.
      -@- The receiver set up time should be managed by software. The IrDA physical layer
          specification specifies a minimum of 10 ms delay between transmission and 
          reception (IrDA is a half duplex protocol).
      -@- In IrDA mode, the following bits must be kept cleared:
        (+@) LINEN, STOP and CLKEN bits in the USART_CR2 register.
        (+@) SCEN and HDSEL bits in the USART_CR3 register.

Function Documentation

void USART_IrDACmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the USART's IrDA interface.

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

Return values

None

Definition at line 1053 of file stm32f4xx_usart.c.

void USART_IrDAConfig	(	USART_TypeDef *	USARTx,
		uint16_t	USART_IrDAMode
	)

Configures the USART's IrDA interface.

Parameters

USARTx	where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.
USART_IrDAMode	specifies the IrDA mode. This parameter can be one of the following values: USART_IrDAMode_LowPower USART_IrDAMode_Normal

Return values

None

Definition at line 1035 of file stm32f4xx_usart.c.