下面是我用的STM32单片机串口5的初始化 然后再主函数里面一直发送数据 串口助手的相关配置和串口的配置一样 但是接收的数据和自己发送的数据不一致下面是串口5的初始化(单片机用的是CP2102芯片转USB和电脑连接的)，求大神解答

void Uart5_Init(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

//        RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5 , ENABLE);

// Configure USART5 Tx (PC.12) as alternate function push-pull

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC,   &GPIO_InitStructure);

// Configure USART5 Rx (PD.2) as input floating

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_2;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOD, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 9600;

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1;

USART_InitStructure.USART_Parity = USART_Parity_No;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_Init(UART5, &USART_InitStructure);

// 使能 USART5

USART_Cmd(UART5, ENABLE);

USART_ITConfig(UART5,USART_IT_RXNE,ENABLE);//开中断

USART5_NVIC_Configuration();

USARTClearFlag(UART5,USART_FLAG_TC);

USARTClearFlag(UART5,USART_FLAG_TXE);

}

void USART5_NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/*Enable the USARTy Interrupt*/

NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

//接收串口来的数据

void UART5_IRQHandler(void)

{

}

void USARTSendData(USART_TypeDef* USARTx, uint8_t Data)

{

/* Transmit Data */

USARTx->DR = (Data & (uint16_t)0x01FF);

delay_ms(1);

}

下面是主函数

void main()

{

Uart5_Init();

while(1)

{

USARTSendData(UART5,0x12);

}

}