Function HAL_SetSerialWriteMode 

pub unsafe extern "C" fn HAL_SetSerialWriteMode(
    port: Type,
    mode: i32,
    status: *mut i32,
)

Sets the write mode on a serial port.

Valid values are: 1: Flush on access 2: Flush when full (default)

@param port the serial port @param mode the mode to set (see remarks for valid values)