图片显示原理w25x16一次读取出5000个像素点，然后一次向彩屏中写入5000个点。但是刷屏速度比较2.4寸的显示屏需要0.5左右。采用的单片机是STM32f030.有人解决过这个方案？或者谁懂如何提高spi的通信速度？spi初始化程序如下：/*******************************************************************************
* Function Name  : SPI_FLASH_Init
* Description    : Initializes the peripherals used by the SPI FLASH driver.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_Init(void)
{
         
  GPIO_InitTypeDef  GPIO_InitStruct;
  SPI_InitTypeDef   SPI_InitStruct;

  /*!< SD_SPI_CS_GPIO, SD_SPI_MOSI_GPIO, SD_SPI_MISO_GPIO, SD_SPI_DETECT_GPIO
       and SD_SPI_SCK_GPIO Periph clock enable */
//          RCC_AHBPeriphClockCmd(FLASH_CS_PIN_SCK|FLASH_SCK_PIN_SCK|FLASH_MISO_PIN_SCK | FLASH_MOSI_PIN_SCK, ENABLE);
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF| RCC_AHBPeriph_GPIOB, ENABLE);
  /*!< SD_SPI Periph clock enable */
        
  RCC_APB1PeriphClockCmd(FLASH_SPI2, ENABLE);

  /*!< Configure SD_SPI pins: SCK */
  GPIO_InitStruct.GPIO_Pin = FLASH_SCK_PIN;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_Level_3;
  GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStruct.GPIO_PuPd  = GPIO_PuPd_UP;
  GPIO_Init(FLASH_SCK_PORT, &GPIO_InitStruct);

  /*!< Configure SD_SPI pins: MISO */
  GPIO_InitStruct.GPIO_Pin = FLASH_MISO_PIN;
  GPIO_Init(FLASH_MISO_PORT, &GPIO_InitStruct);

  /*!< Configure SD_SPI pins: MOSI */
  GPIO_InitStruct.GPIO_Pin =FLASH_MOSI_PIN;
  GPIO_Init(FLASH_MOSI_PORT, &GPIO_InitStruct);

  /* Connect PXx to SD_SPI_SCK */
  GPIO_PinAFConfig(FLASH_SCK_PORT, FLASH_SCK_SOURCE, FLASH_SCK_AF);

  /* Connect PXx to SD_SPI_MISO */
  GPIO_PinAFConfig(FLASH_MISO_PORT, FLASH_MISO_SOURCE, FLASH_MISO_AF);

  /* Connect PXx to SD_SPI_MOSI */
  GPIO_PinAFConfig(FLASH_MOSI_PORT, FLASH_MOSI_SOURCE, FLASH_MOSI_AF);
        
        
         /*!< Configure SD_SPI_CS_PIN pin: SD Card CS pin */
  GPIO_InitStruct.GPIO_Pin =FLASH_CS_PIN;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_Level_3;
  GPIO_Init(FLASH_CS_PORT, &GPIO_InitStruct);
        
  SPI_FLASH_CS_HIGH();

  /*!< SD_SPI Config */
  SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
  SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStruct.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStruct.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
//  SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
        SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStruct.SPI_CRCPolynomial = 7;
  SPI_Init(SPI2, &SPI_InitStruct);
  SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);
  SPI_Cmd(SPI2, ENABLE); /*!< SD_SPI enable */
}
w25x16的读取程序如下：
/*******************************************************************************
* Function Name  : SPI_FLASH_BufferRead
* Description    : Reads a block of data from the FLASH.
* Input          : - pBuffer : pointer to the buffer that receives the data read
*                    from the FLASH.
*                  - ReadAddr : FLASH's internal address to read from.
*                  - NumByteToRead : number of bytes to read from the FLASH.
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_BufferRead(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t NumByteToRead)
{
  /* Select the FLASH: Chip Select low */
  SPI_FLASH_CS_LOW();

  /* Send "Read from Memory " instruction */
  SPI_FLASH_SendByte(W25X_ReadData);

  /* Send ReadAddr high nibble address byte to read from */
  SPI_FLASH_SendByte((ReadAddr & 0xFF0000) >> 16);
  /* Send ReadAddr medium nibble address byte to read from */
  SPI_FLASH_SendByte((ReadAddr& 0xFF00) >> 8);
  /* Send ReadAddr low nibble address byte to read from */
  SPI_FLASH_SendByte(ReadAddr & 0xFF);

  while (NumByteToRead--) /* while there is data to be read */
  {
    /* Read a byte from the FLASH */
    *pBuffer = SPI_FLASH_SendByte(Dummy_Byte);
    /* Point to the next location where the byte read will be saved */
    pBuffer++;
  }

  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();
}

附件是w25x16的驱动程序

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