stm32 USART以DMA方式发送数据时出现乱码，，求解

我在测试USART DMA方式发送数据的时候出现了串口助手接收到的数据和程序中数据不一致的问题，感觉像是错位问题，但是跟错位感觉又不一样。大婶们帮忙看看吧，

void USART1_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    /* config USART1 clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

    /* USART1 GPIO config */
    /* Configure USART1 Tx (PA.09) as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure USART1 Rx (PA.10) as input floating */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* USART1 mode config */
    USART_InitStructure.USART_BaudRate = 57600;
    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(USART1, &USART_InitStructure);
    USART1_NVIC_Config();
    USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
    USART_Cmd(USART1, ENABLE);
    USART_ClearFlag(USART1, USART_FLAG_TC);

    //DMA for USART1 TX Config
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//DMA1
    /* DMA1 Channel4 (triggered by USART1 Tx event) Config */
    DMA_DeInit(DMA1_Channel4); 
    DMA_InitStructure.DMA_PeripheralBaseAddr = 0x40013804;
    DMA_InitStructure.DMA_MemoryBaseAddr = USART1_SEND_DATA;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = 512;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel4, &DMA_InitStructure);
    DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
    DMA_ITConfig(DMA1_Channel4, DMA_IT_TE, ENABLE);
    USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
    DMA_Cmd(DMA1_Channel4, DISABLE);

    //DMA for USART1 RX Config
    DMA_DeInit(DMA1_Channel5); 
    DMA_InitStructure.DMA_PeripheralBaseAddr = 0x40014804;
    DMA_InitStructure.DMA_MemoryBaseAddr = USART1_RECEIVE_DATA;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = 512;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel5, &DMA_InitStructure);
    DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
    DMA_ITConfig(DMA1_Channel5, DMA_IT_TE, ENABLE);    
    USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
    DMA_Cmd(DMA1_Channel5,ENABLE);
}

void Usart1Sends(u8* data_at,u8 data_len)           //DMA发送
{
    u8 i;
    while(Txd1_Flag==0)//等待数据完成才下一次
    {
    ;
    }
    //将数据送DMA存储地址
    for(i=0;i<data_len;i++ )
    {
        USART1_SEND_DATA[i]=data_at[i];
    }
    DMA_Cmd(DMA1_Channel4, DISABLE); //改变datasize前先要禁止通道工作
    DMA1_Channel4->CNDTR=data_len; //DMA1,传输数据量
    Txd1_Flag = 0 ;//DMA传输开始标志量
    GPIO_ResetBits(GPIOC,GPIO_Pin_2);
    DMA_Cmd(DMA1_Channel4, ENABLE); 
}

下面是要发送的数组

    Usart1Sends(&readpageID[0],sizeof(readpageID));
    Usart1Sends(&readtime[0],sizeof(readtime));
    Usart1Sends(&AAAA[0],sizeof(AAAA));
    Usart1Sends(&BBBB[0],sizeof(BBBB));

//要发送的数组
u8 readtime [6]={85,170,3,129,32,16};            //读时间指令
//u8 readtime [6]={0x55,0xAA,0x03,0x82,0x20,0x10}
u8 readpageID[6]={0x55,0xAA,0x03,0x81,0x03,0x02};        //读ID指令
u8 readRXdata[7]={0x55,0xAA,0x04,0x83,0x00,0x00,0x7E};    //读数据指令
u8 AAAA[6]={1,2,3,4,5,6};
u8 BBBB[6]={2,3,4,5,6,7};

串口助手接收到的数据是这样的

还需要什么代码喊我一声我再往上粘

只用过hal库，插个眼，第一次看见人用57600波特率。至少第一位对了，不知道是不是地址传的有问题还是其他。
就经验而言你的 USART1_SEND_DATA 就在绑定通道四的使用了一次，下面传递函数的时候用了一次，至少uart dma 发送函数应该也要用一次吧。
就纯猜，错了勿cui。

//供参考
void DMA_INIT(void)
{
    DMA_InitTypeDef DMA_InitStructure;
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
    
    //Rx
    DMA_DeInit(DMA1_Channel5);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(ReadDataBuf);
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = sizeof(ReadDataBuf);
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel5, &DMA_InitStructure);  
    DMA_Cmd(DMA1_Channel5,ENABLE);
 
    //Tx
    DMA_DeInit(DMA1_Channel4);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(DataBuf);
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = sizeof(DataBuf);
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel4, &DMA_InitStructure);  
    DMA_Cmd(DMA1_Channel4,DISABLE);
    
    DMA_ClearFlag(DMA1_FLAG_GL7);
}
void GPIOINIT()          
{
    
    GPIO_InitTypeDef GPIO_InitStructure;
    
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
    
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;    
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
    
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;    
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);

}
static void USART1_NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
void USARTINIT()          
{
    USART_InitTypeDef USART_InitStructure;
    USART_InitStructure.USART_BaudRate = 115200;
    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_Tx | USART_Mode_Rx;
    USART_Init(USART1, &USART_InitStructure);
    
    USART_Cmd(USART1,ENABLE);    
    USART_ITConfig(USART1,USART_IT_IDLE,ENABLE);
    USART_ClearFlag(USART1,USART_FLAG_TC);
    USART_ClearFlag(USART1, USART_FLAG_IDLE);

    DMA_INIT();
    USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
    USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
    USART1_NVIC_Configuration();
}
void Send_str_len(char *P,int len) 
{
    DMA_Cmd(DMA1_Channel4, DISABLE);
    memcpy(DataBuf, P, len);
    USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
    DMA_SetCurrDataCounter(DMA1_Channel4, len);
    DMA_Cmd(DMA1_Channel4, ENABLE);
    while(DMA_GetCurrDataCounter(DMA1_Channel4));
    while(USART_GetFlagStatus(USART1, USART_FLAG_TC) != SET);
    memset(DataBuf, 0, len);
}