LIN mode functions
[USART_Private_Functions]

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                       ##### LIN mode functions #####
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    [..] This subsection provides a set of functions allowing to manage the USART 
         LIN Mode communication.
    [..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance 
         with the LIN standard.
    [..] Only this LIN Feature is supported by the USART IP:
         (+) LIN Master Synchronous Break send capability and LIN slave break 
             detection capability :  13-bit break generation and 10/11 bit break 
             detection.
    [..] USART LIN Master transmitter communication is possible through the 
         following procedure:
         (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, 
             Mode transmitter or Mode receiver and hardware flow control values 
             using the USART_Init() function.
         (#) Enable the LIN mode using the USART_LINCmd() function.
         (#) Enable the USART using the USART_Cmd() function.
         (#) Send the break character using USART_SendBreak() function.
    [..] USART LIN Master receiver communication is possible through the 
         following procedure:
         (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, 
             Mode transmitter or Mode receiver and hardware flow control values 
             using the USART_Init() function.
         (#) Configures the break detection length 
             using the USART_LINBreakDetectLengthConfig() function.
         (#) Enable the LIN mode using the USART_LINCmd() function.
         (#) Enable the USART using the USART_Cmd() function.
         [..]
         (@) In LIN mode, the following bits must be kept cleared:
             (+@) CLKEN in the USART_CR2 register.
             (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.