How to configure DMA when STM32F469 uses 16 bit SDRM？

[ac.2]

Hi：​

Let me ask you a question.

When use 32 bits of SDRAM in STM469 official routines, DMA is configured as follows:

 /* Configure common DMA parameters */
 dma_handle.Init.Channel = SDRAM_DMAx_CHANNEL;
 dma_handle.Init.Direction = DMA_MEMORY_TO_MEMORY;
 dma_handle.Init.PeriphInc = DMA_PINC_ENABLE;
 dma_handle.Init.MemInc = DMA_MINC_ENABLE;
 
 
 dma_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
 dma_handle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
 
 
 dma_handle.Init.Mode = DMA_NORMAL;
 dma_handle.Init.Priority = DMA_PRIORITY_HIGH;
 dma_handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
 dma_handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
 dma_handle.Init.MemBurst = DMA_MBURST_SINGLE;
 dma_handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
 
 dma_handle.Instance = SDRAM_DMAx_STREAM;
 
 /* Associate the DMA handle */
 __HAL_LINKDMA(hsdram, hdma, dma_handle);
 
 /* Deinitialize the stream for new transfer */
 HAL_DMA_DeInit(&dma_handle);
 
 /* Configure the DMA stream */
 HAL_DMA_Init(&dma_handle);

Now I change SDRAM to 16 bit data width. Should DMA also be modified accordingly? If so, how should it be modified in the configuration?

Thank you very much.

[Tesla DeLorean]

Why would the DMA width need to change?

[ac.2]

Because the data width of my product SDRAM is 16 bits. So I wonder if I want to change the data width of SDRAM dam to 16 bits.

[ac.2]

Because the data width of my product SDRAM is 16 bits. So I wonder if I want to change the data width of SDRAM dam to 16 bits.