linked-list GPDMA to SPI TX triggered by timer15 TRGO does not work

[dh_leslie]

/**
  * @brief  DMA Linked-list yWaveQ configuration
  * @PAram  None
  * @retval None
  */
HAL_StatusTypeDef MX_yWaveQ_Config(void)
{
  HAL_StatusTypeDef ret = HAL_OK;
  /* DMA node configuration declaration */
  DMA_NodeConfTypeDef pNodeConfig;

  /* Set node configuration ################################################*/
  pNodeConfig.NodeType = DMA_GPDMA_LINEAR_NODE;
  pNodeConfig.Init.Request = GPDMA1_REQUEST_SPI3_TX;
  pNodeConfig.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
  pNodeConfig.Init.Direction = DMA_MEMORY_TO_PERIPH;
  pNodeConfig.Init.SrcInc = DMA_SINC_INCREMENTED;
  pNodeConfig.Init.DestInc = DMA_DINC_FIXED;
  pNodeConfig.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;
  pNodeConfig.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;
  pNodeConfig.Init.SrcBurstLength = 2;
  pNodeConfig.Init.DestBurstLength = 1;
  pNodeConfig.Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0|DMA_DEST_ALLOCATED_PORT1;
  pNodeConfig.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;
  pNodeConfig.TriggerConfig.TriggerMode = DMA_TRIGM_SINGLE_BURST_TRANSFER ;
  pNodeConfig.TriggerConfig.TriggerPolarity = DMA_TRIG_POLARITY_RISING;
  pNodeConfig.TriggerConfig.TriggerSelection = GPDMA1_TRIGGER_TIM15_TRGO;
  pNodeConfig.DataHandlingConfig.DataExchange = DMA_EXCHANGE_NONE;
  pNodeConfig.DataHandlingConfig.DataAlignment = DMA_DATA_RIGHTALIGN_ZEROPADDED;
  pNodeConfig.SrcAddress = (uint32_t)SpiTable[0];
  pNodeConfig.DstAddress = (uint32_t)&(SPI3->TXDR);
  pNodeConfig.DataSize = 8;

  /* Build DMASpi1 Node */
  ret |= HAL_DMAEx_List_BuildNode(&pNodeConfig, &DMASpi1);

  /* Insert DMASpi1 to Queue */
  ret |= HAL_DMAEx_List_InsertNode_Tail(&yWaveQ, &DMASpi1);

  /* Set node configuration ################################################*/
  pNodeConfig.SrcAddress = (uint32_t)SpiTable[1];

  /* Build DMASpi2 Node */
  ret |= HAL_DMAEx_List_BuildNode(&pNodeConfig, &DMASpi2);

  /* Insert DMASpi2 to Queue */
  ret |= HAL_DMAEx_List_InsertNode_Tail(&yWaveQ, &DMASpi2);

  ret |= HAL_DMAEx_List_SetCircularModeConfig(&yWaveQ, &DMASpi1);

   return ret;
}

  MX_yWaveQ_Config();
  HAL_DMAEx_List_LinkQ(&handle_GPDMA1_Channel2, &yWaveQ);
  HAL_DMAEx_List_Start(&handle_GPDMA1_Channel2);
  __HAL_SPI_ENABLE(&hspi3);
  HAL_TIM_Base_Start(&htim15);

There is no output observed at SPI SCK pin.

Any suggestion is welcome.