SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
        SPI_InitStructure.SPI_Mode = SPI_Mode_Master;               
        SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;               
        SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;       
        SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;       
        SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;               
        SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;               
        SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;       
        SPI_InitStructure.SPI_CRCPolynomial = 7;       
        SPI_Init(SPI2, &SPI_InitStructure);
波特率设置问题，我用SPI接口传输的AD采样值，我用32分频的时候可以正常采集，数据正常。我用8分频的时候数据就乱了，这是为什么？？