Half-duplex mode function.
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Half-duplex mode function.
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##### Half-duplex mode function #####
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This subsection provides a set of functions allowing to manage the USART
Half-duplex communication.
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The USART can be configured to follow a single-wire half-duplex protocol where
the TX and RX lines are internally connected.
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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.
| 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
-