原子大神请进啊，我又来提问了

xsx127

你说的把图片数据存进sram，是通过软件FSMC_SRAM_WriteBuffer（）写进去，还是通过调keil直接可以把数组下载到sram？
数组加了const之后是下载到了哪里？
下面这个是库里面关于DMA读写fsmc的例子，只有sram的地址，为什么可以和fsmc连接，，
还是想快速刷屏，求代码指点

#define BufferSize  32

#define Bank1_SRAM3_ADDR    ((uint32_t)0x68000000)

volatile TestStatus TransferStatus;

const uint32_t SRC_Const_Buffer[BufferSize]= {

                            0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,

                            0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,

                            0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,

                            0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40,

                            0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,

                            0x51525354,0x55565758,0x595A5B5C,0x5D5E5F60,

                            0x61626364,0x65666768,0x696A6B6C,0x6D6E6F70,

                            0x71727374,0x75767778,0x797A7B7C,0x7D7E7F80};

uint8_t DST_Buffer[4*BufferSize], Idx = 0;

TestStatus Buffercmp(const uint32_t* pBuffer, uint32_t* pBuffer1, uint16_t BufferLength);

DMA_InitTypeDef DMA_InitStructure;

   /* Write to FSMC -----------------------------------------------------------*/

  /* DMA2 channel5 configuration */

  DMA_DeInit(DMA2_Channel5);

  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SRC_Const_Buffer;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Bank1_SRAM3_ADDR;    

  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;

  DMA_Init(DMA2_Channel5, &DMA_InitStructure);

  /* Enable DMA2 channel5 */

  DMA_Cmd(DMA2_Channel5, ENABLE);

  /* Check if DMA2 channel5 transfer is finished */

  while(!DMA_GetFlagStatus(DMA2_FLAG_TC5));

  /* Clear DMA2 channel5 transfer complete flag bit */

  DMA_ClearFlag(DMA2_FLAG_TC5);

  /* Read from FSMC ----------------------------------------------------------*/

  /* Destination buffer initialization */ 

  for(Idx=0; Idx<128; Idx++) DST_Buffer[Idx]=0;

  /* DMA1 channel3 configuration */

  DMA_DeInit(DMA1_Channel3);

  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)Bank1_SRAM3_ADDR;  

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)DST_Buffer;

  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;

  DMA_Init(DMA1_Channel3, &DMA_InitStructure);

  /* Enable DMA1 channel3 */

  DMA_Cmd(DMA1_Channel3, ENABLE);

  /* Check if DMA1 channel3 transfer is finished */

  while(!DMA_GetFlagStatus(DMA1_FLAG_TC3));

  /* Clear DMA1 channel3 transfer complete flag bit */

  DMA_ClearFlag(DMA1_FLAG_TC3);

正点原子

回复【楼主位】xsx127:
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图片存SRAM/FLASH都可以.sram的话,需要单片机解码放到SRAM,FLASH就可以直接在下载的时候,就放进去.
而这里的地址:Bank1_SRAM3_ADDR,就是LCD的地址,所以只需要设置这个和图片地址(DST_Buffer)就可以了.就是所谓的存储器到存储器模式...

xsx127

 /* Write to FSMC -----------------------------------------------------------*/
 DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SRC_Const_Buffer;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Bank1_SRAM3_ADDR; 

 /* Read from FSMC ----------------------------------------------------------*/
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)Bank1_SRAM3_ADDR;  
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)DST_Buffer;
我理不清了，有4个地址，图片的地址应该就是数组名 (uint16_t)gImage_1，我用这个代替，
 #define LCD_BASE   ((u32)(0x60000000 | 0x0C000000))，这个是LCD的地址
我要写彩屏，是应该要Read from FSMC吗？那上面的Write to FSMC还要么
数据是从哪条指令开始传输的？传输完后，是不是彩屏直接就显示了，我还要做什么么

正点原子

回复【3楼】xsx127:
---------------------------------
LCD是挂在FSMC上的,你写LCD,怎么会是READ?read=读.write=写啊.
你先搞懂LCD的显示吧,好好研究下我们的实验10,会LCD显示了,再玩高级点的.否则底层都模模糊糊,上面不是摇摇欲坠....

shi1017

回复【2楼】正点原子:
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请问这个单片机解码写到SRAM是啥意思啊？ 外部的SRAM也是这样吗？不是可以直接通过DMA把采集到的数据写到外部SRAM（地址已配置）？

正点原子

是的