使用DMA转运SPI时只有第一段数据正确，后面全为ffff

在使用HAL_SPI_TransmitReceive(&hspi2,send,rec,310,0xffffffff);时数据都是正常的，
当使用dma传输时，除了第一个正常，后面全是fff
HAL_SPI_TransmitReceive_DMA(&hspi2,send,rec,310);
现象如下：

spi和dma配置如下：
void MX_SPI2_Init(void)
{

/* USER CODE BEGIN SPI2_Init 0 */

/* USER CODE END SPI2_Init 0 */

/* USER CODE BEGIN SPI2_Init 1 */

/* USER CODE END SPI2_Init 1 /
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 7;
hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
/ USER CODE BEGIN SPI2_Init 2 */

/* USER CODE END SPI2_Init 2 */

}

void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
if(spiHandle->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspInit 0 */

/* USER CODE END SPI1_MspInit 0 /
/ SPI1 clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA5     ------> SPI1_SCK
PA6     ------> SPI1_MISO
PA7     ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USER CODE BEGIN SPI1_MspInit 1 */

/* USER CODE END SPI1_MspInit 1 /
}
else if(spiHandle->Instance==SPI2)
{
/ USER CODE BEGIN SPI2_MspInit 0 */

/* USER CODE END SPI2_MspInit 0 /
/ SPI2 clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();
/**SPI2 GPIO Configuration
PB13     ------> SPI2_SCK
PB14     ------> SPI2_MISO
PB15     ------> SPI2_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* SPI2 DMA Init */
/* SPI2_RX Init */
hdma_spi2_rx.Instance = DMA1_Channel2;
hdma_spi2_rx.Init.Request = DMA_REQUEST_SPI2_RX;
hdma_spi2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_spi2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi2_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi2_rx.Init.Mode = DMA_NORMAL;
hdma_spi2_rx.Init.Priority = DMA_PRIORITY_HIGH;
if (HAL_DMA_Init(&hdma_spi2_rx) != HAL_OK)
{
  Error_Handler();
}

__HAL_LINKDMA(spiHandle,hdmarx,hdma_spi2_rx);

/* SPI2_TX Init */
hdma_spi2_tx.Instance = DMA1_Channel3;
hdma_spi2_tx.Init.Request = DMA_REQUEST_SPI2_TX;
hdma_spi2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi2_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi2_tx.Init.Mode = DMA_NORMAL;
hdma_spi2_tx.Init.Priority = DMA_PRIORITY_LOW;
if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK)
{
  Error_Handler();
}

__HAL_LINKDMA(spiHandle,hdmatx,hdma_spi2_tx);

/* USER CODE BEGIN SPI2_MspInit 1 */

/* USER CODE END SPI2_MspInit 1 */
}
}

void HAL_SPI_MspDeInit(SPI_HandleTypeDef* spiHandle)
{

if(spiHandle->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspDeInit 0 */

/* USER CODE END SPI1_MspDeInit 0 /
/ Peripheral clock disable */
__HAL_RCC_SPI1_CLK_DISABLE();

/**SPI1 GPIO Configuration
PA5     ------> SPI1_SCK
PA6     ------> SPI1_MISO
PA7     ------> SPI1_MOSI
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);

/* USER CODE BEGIN SPI1_MspDeInit 1 */

/* USER CODE END SPI1_MspDeInit 1 /
}
else if(spiHandle->Instance==SPI2)
{
/ USER CODE BEGIN SPI2_MspDeInit 0 */

/* USER CODE END SPI2_MspDeInit 0 /
/ Peripheral clock disable */
__HAL_RCC_SPI2_CLK_DISABLE();

/**SPI2 GPIO Configuration
PB13     ------> SPI2_SCK
PB14     ------> SPI2_MISO
PB15     ------> SPI2_MOSI
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15);

/* SPI2 DMA DeInit */
HAL_DMA_DeInit(spiHandle->hdmarx);
HAL_DMA_DeInit(spiHandle->hdmatx);

/* USER CODE BEGIN SPI2_MspDeInit 1 */

/* USER CODE END SPI2_MspDeInit 1 */
}
}

u32 AD_Read()
{
u8 rec[50],send[50],i=0;
u16 cmd=0;
//HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_RESET);
//HAL_Delay(1);
//HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_SET);
while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_8)==0);
memset(send,0,sizeof(send));
CS_Set(0);
//HAL_Delay(1);
cmd=0xa100;
send[0]=(cmd>>8)&0xff;
send[1]=(cmd>>0)&0xff;
send[2]=0;

HAL_SPI_TransmitReceive_DMA(&hspi2,send,rec,3*10);
//HAL_SPI_TransmitReceive(&hspi2,send,rec,3*10,0xffffffff);
//HAL_SPI_Receive(&hspi2,rec+2,24,0xffff);// 3*8
//HAL_Delay(1);
CS_Set(1);

for(i=0;i<8;i++)
{
		if(rec[3+i*3]&0x80)
		{
			send[3]=0xff;
		}
		else
			send[3]=0;
		send[2]=rec[3+i*3+0];
		send[1]=rec[3+i*3+1];
		send[0]=rec[3+i*3+2];
		memcpy(&(adcDat[i]),send,4);
}
请哪位大神有解决方法，卡好几天了，谢谢大家。