problem send byte via spi dma tx

hi I'm trying to send a byte to arduino with spi2 in circular dma tx in circular mode,

at the beginning the dma starts then I don't understand why the cpu

crashes in the while (1), here the code:

 MX_GPIO_Init();

 MX_DMA_Init();

 MX_SPI2_Init();

 MX_USART2_UART_Init();

 /* USER CODE BEGIN 2 */

 HAL_SPI_Transmit_DMA(&hspi2,&i, 1);

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 while (1)

 {

 i++;

HAL_Delay(200);

}}

here dma set:

void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)

{

 GPIO_InitTypeDef GPIO_InitStruct = {0};

 if(hspi->Instance==SPI2)

 {

 /* USER CODE BEGIN SPI2_MspInit 0 */

 /* USER CODE END SPI2_MspInit 0 */

  /* Peripheral clock enable */

  __HAL_RCC_SPI2_CLK_ENABLE();

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOB_CLK_ENABLE();

  /**SPI2 GPIO Configuration   

  PC2   ------> SPI2_MISO

  PC3   ------> SPI2_MOSI

  PB10   ------> SPI2_SCK

  PB12   ------> SPI2_NSS 

  */

  GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;

  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_12;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;

  GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;

  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* SPI2 DMA Init */

  /* SPI2_TX Init */

  hdma_spi2_tx.Instance = DMA1_Stream4;

  hdma_spi2_tx.Init.Channel = DMA_CHANNEL_0;

  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_CIRCULAR;

  hdma_spi2_tx.Init.Priority = DMA_PRIORITY_LOW;

  hdma_spi2_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;

  if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK)

  {

   Error_Handler();

  }

thanks