STM32F4 Standard Peripheral bibliotheek  1.0
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IrDA mode functions

IrDA mode functions. More...


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:
     1. Program the Baud rate, Word length = 8 bits, Stop bits, Parity, Transmitter/Receiver 
        modes and hardware flow control values using the USART_Init() function.
     2. Enable the USART using the USART_Cmd() function.
     3. Configures the IrDA pulse width by configuring the prescaler using  
        the USART_SetPrescaler() function.
     4. Configures the IrDA  USART_IrDAMode_LowPower or USART_IrDAMode_Normal mode
        using the USART_IrDAConfig() function.
     5. Enable the IrDA using the USART_IrDACmd() function.

@note A pulse of width less than two and greater than one PSC period(s) may or may
      not be rejected.
@note 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).
@note 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.

USARTx,:where x can be 1, 2, 3, 4, 5 or 6 to select the USART or UART peripheral.
NewState,:new state of the IrDA mode. This parameter can be: ENABLE or DISABLE.
Return values
void USART_IrDAConfig ( USART_TypeDef *  USARTx,
uint16_t  USART_IrDAMode 

Configures the USART's IrDA interface.

USARTx,:where x can be 1, 2, 3, 4, 5 or 6 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