如何STM32标准库串口运行中修改波特率？

void uart_Set_Bound_Parity(u32 B_index,u16 P_index )

{

   USART_InitTypeDef USART_InitStructure;

   u32 Bound;

   u16 Parity;

   u32 bound_Arry[7]={9600,14400,19200,38400,56000,57600,115200};

   u16 Parity_Arry[3]={USART_Parity_No,USART_Parity_Even,USART_Parity_Odd};

   Bound=bound_Arry[B_index];

   Parity=Parity_Arry[P_index];

   //while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

   USART_Cmd(USART1, DISABLE);

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);        //使能USART1，GPIOA时钟

   USART_InitStructure.USART_BaudRate = Bound;//一般设置为9600;

        if(USART_Parity_No==Parity)

        {

                USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式

                USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

                USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位

        }

        

        if(USART_Parity_Even==Parity)

        {

                USART_InitStructure.USART_WordLength = USART_WordLength_9b;//字长为8位数据格式

                USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

                USART_InitStructure.USART_Parity = Parity;//偶校验位

        }



        if(USART_Parity_Odd==Parity)

        {

                USART_InitStructure.USART_WordLength = USART_WordLength_9b;//字长为8位数据格式

                USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位

                USART_InitStructure.USART_Parity = Parity;//奇校验位

        }

        



        USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制

        USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;        //收发模式



        USART_Init(USART1, &USART_InitStructure); //初始化串口

        USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断

        USART_ITConfig(USART1, USART_IT_TC  , ENABLE);

        

        USART_Cmd(USART1, ENABLE);        



}





//设置波特率和校验位

void uart_Set_Bound_ParityPrioc(void)

{

    u8 old_B_index,old_P_index;

        u8 bounTemp,ParityTemp;

        

        old_B_index=Oldbound;

        old_P_index=OldParity;

        bounTemp=CompRum.boun;

        ParityTemp=CompRum.Parity;

    if((old_B_index!=bounTemp)||(old_P_index!=ParityTemp))

    {

        

                u32 Bound;

                u16 Parity;

                u32 bound_Arry[7]={9600,14400,19200,38400,56000,57600,115200};

                u16 Parity_Arry[3]={USART_Parity_No,USART_Parity_Even,USART_Parity_Odd};

                Bound=bound_Arry[CompRum.boun];

                Parity=Parity_Arry[CompRum.Parity];

                Oldbound=CompRum.boun;

                OldParity=CompRum.Parity;

                uart_Set_Bound_Parity(CompRum.boun,CompRum.Parity);

                //uart_init1(Bound,Parity);

        }

}