Initialization and de-initialization functions
[UARTEx Exported Functions]

===============================================================================
            ##### Initialization and Configuration functions #####
 ===============================================================================
    [..]
    This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
    in asynchronous mode.
      (+) For the asynchronous mode the parameters below can be configured:
        (++) Baud Rate
        (++) Word Length
        (++) Stop Bit
        (++) Parity: If the parity is enabled, then the MSB bit of the data written
             in the data register is transmitted but is changed by the parity bit.
             Depending on the frame length defined by the  M1 and M0 bits (7-bit,
             8-bit or 9-bit),
             the possible UART frame formats are as listed in the following table:
            
            (+++)    Table 1. UART frame format.              
            (+++)   +-----------------------------------------------------------------------+
            (+++)   |  M1 bit |  M0 bit |  PCE bit  |             UART frame                |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    0    |    0    |    0      |    | SB |    8 bit data   | STB |     |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    0    |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    0    |    1    |    0      |    | SB |    9 bit data   | STB |     |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    0    |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    1    |    0    |    0      |    | SB |    7 bit data   | STB |     |
            (+++)   |---------|---------|-----------|---------------------------------------|
            (+++)   |    1    |    0    |    1      |    | SB | 6 bit data | PB | STB |     |
            (+++)   +-----------------------------------------------------------------------+
        (++) Hardware flow control
        (++) Receiver/transmitter modes
        (++) Over Sampling Method
        (++) One-Bit Sampling Method
      (+) For the asynchronous mode, the following advanced features can be configured as well:
        (++) TX and/or RX pin level inversion
        (++) data logical level inversion
        (++) RX and TX pins swap
        (++) RX overrun detection disabling
        (++) DMA disabling on RX error
        (++) MSB first on communication line
        (++) auto Baud rate detection
    [..]
    The HAL_RS485Ex_Init() API follows the UART RS485 mode configuration
     procedures (details for the procedures are available in reference manual).