Can STM32F103 transfer data between internal sram and FMSC by DMA?

[271472827]

Posted on June 12, 2010 at 13:38

Can STM32F103 transfer data between internal sram and FMSC by DMA?

[Tesla DeLorean]

Posted on May 17, 2011 at 13:54

Yes. The example code in \Examples\DMA\FSMC shows FLASH-to-FSMC, and FSMC-to-SRAM. And boards driving LCD's use SRAM-to-FSMC.

FLASH/SRAM-to-FSMC

  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SRC_Const_Buffer; // FLASH/SRAM

  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)Bank1_SRAM3_ADDR; // FSMC

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

  DMA_InitStructure.DMA_BufferSize = 32;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;

FSMC-to-SRAM

  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)Bank1_SRAM3_ADDR; // FSMC

  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)DST_Buffer; // SRAM

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

  DMA_InitStructure.DMA_BufferSize = 128;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;

[chikos332]

Posted on May 17, 2011 at 13:54

Hi,

Yes it is possible.

FSMC is considered as memory location just like Flash and SRAM, so you have to use memory to memory mode (with no circular mode of course).

Cheers.

[271472827]

Posted on May 17, 2011 at 13:54

Thank you very much!