DMA transfers management functions. More...

Collaboration diagram for DMA transfers management functions:

Functions
void	USART_DMACmd (USART_TypeDef *USARTx, uint16_t USART_DMAReq, FunctionalState NewState)
	Enables or disables the USART's DMA interface. More...

void	USART_SetAutoRetryCount (USART_TypeDef *USARTx, uint8_t USART_AutoCount)
	Sets the Smart Card number of retries in transmit and receive. More...

void	USART_SetBlockLength (USART_TypeDef *USARTx, uint8_t USART_BlockLength)
	Sets the Smart Card Block length. More...

void	USART_SetGuardTime (USART_TypeDef *USARTx, uint8_t USART_GuardTime)
	Sets the specified USART guard time. More...

void	USART_SmartCardCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's Smart Card mode. More...

void	USART_SmartCardNACKCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables NACK transmission. More...

Detailed Description

DMA transfers management functions.

Smartcard mode functions.

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              ##### DMA transfers management functions #####
 ===============================================================================

 ===============================================================================
                     ##### Smartcard mode functions #####
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    [..] This subsection provides a set of functions allowing to manage the USART
         Smartcard communication.
    [..] The Smartcard interface is designed to support asynchronous protocol 
         Smartcards as defined in the ISO 7816-3 standard. The USART can provide 
         a clock to the smartcard through the SCLK output. In smartcard mode, 
         SCLK is not associated to the communication but is simply derived from 
         the internal peripheral input clock through a 5-bit prescaler.
    [..] Smartcard communication is possible through the following procedure:
         (#) Configures the Smartcard Prsecaler using the USART_SetPrescaler() 
             function.
         (#) Configures the Smartcard Guard Time using the USART_SetGuardTime() 
             function.
         (#) Program the USART clock using the USART_ClockInit() function as following:
             (++) USART Clock enabled.
             (++) USART CPOL Low.
             (++) USART CPHA on first edge.
             (++) USART Last Bit Clock Enabled.
         (#) Program the Smartcard interface using the USART_Init() function as 
             following:
             (++) Word Length = 9 Bits.
             (++) 1.5 Stop Bit.
             (++) Even parity.
             (++) BaudRate = 12096 baud.
             (++) Hardware flow control disabled (RTS and CTS signals).
             (++) Tx and Rx enabled
         (#) Optionally you can enable the parity error interrupt using 
             the USART_ITConfig() function.
         (#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function.
         (#) Enable the Smartcard interface using the USART_SmartCardCmd() function.
         (#) Enable the USART using the USART_Cmd() function.
    [..] 
  Please refer to the ISO 7816-3 specification for more details.
    [..] 
         (@) It is also possible to choose 0.5 stop bit for receiving but it is 
             recommended to use 1.5 stop bits for both transmitting and receiving 
             to avoid switching between the two configurations.
         (@) In smartcard mode, the following bits must be kept cleared:
             (+@) LINEN bit in the USART_CR2 register.
             (+@) HDSEL and IREN bits in the USART_CR3 register.

Function Documentation

void USART_DMACmd	(	USART_TypeDef *	USARTx,
		uint16_t	USART_DMAReq,
		FunctionalState	NewState
	)

Enables or disables the USART's DMA interface.

Parameters

USARTx	where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral.
USART_DMAReq	specifies the DMA request. This parameter can be any combination of the following values: USART_DMAReq_Tx: USART DMA transmit request USART_DMAReq_Rx: USART DMA receive request
NewState	new state of the DMA Request sources. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1099 of file stm32f4xx_usart.c.

void USART_SetAutoRetryCount	(	USART_TypeDef *	USARTx,
		uint8_t	USART_AutoCount
	)

Sets the Smart Card number of retries in transmit and receive.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3.
USART_AutoCount	specifies the Smart Card auto retry count.

Return values

None

Definition at line 1338 of file stm32f30x_usart.c.

void USART_SetBlockLength	(	USART_TypeDef *	USARTx,
		uint8_t	USART_BlockLength
	)

Sets the Smart Card Block length.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3.
USART_BlockLength	specifies the Smart Card block length.

Return values

None

Definition at line 1356 of file stm32f30x_usart.c.

void USART_SetGuardTime	(	USART_TypeDef *	USARTx,
		uint8_t	USART_GuardTime
	)

Sets the specified USART guard time.

Parameters

USARTx	Select the USART peripheral. This parameter can be one of the following values: USART1 or USART2 or USART3.
USART_GuardTime	specifies the guard time.

Return values

None

Definition at line 1270 of file stm32f30x_usart.c.

void USART_SmartCardCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables the USART's Smart Card mode.

Parameters

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

Return values

None

Definition at line 1289 of file stm32f30x_usart.c.

void USART_SmartCardNACKCmd	(	USART_TypeDef *	USARTx,
		FunctionalState	NewState
	)

Enables or disables NACK transmission.

Parameters

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

Return values

None

Definition at line 1314 of file stm32f30x_usart.c.

Functions

Detailed Description

Function Documentation