stm32 SPI通信问题(AT45DB642D)

只看该作者 · 2014-8-18 21:36

本帖最后由 sunchaohu1987 于 2014-8-18 22:39 编辑

这几天写一个STM32F103VC与AT45DB642D芯片通信的程序，可是总是数据写不到存储芯片内，哪位高手帮我看下是怎么回事？谢谢了！

void SPI_Configuration(void)
   {
         SPI_InitTypeDef  SPI_InitStructure;
            SPI_Cmd(SPI1, DISABLE);
            SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
         SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置SPI工作模式:设置为主SPI
         SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;  //设置SPI的数据大小:SPI发送接收8位帧结构
            SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;  //选择了串行时钟的稳态:时钟悬空低
            SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第二个时钟沿
            SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;  //NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制
            SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;  //定义波特率预分频的值:波特率预分频值为256
            SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
         SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
            SPI_Init(SPI1, &SPI_InitStructure);  //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
         SPI_Cmd(SPI1, ENABLE); //使能SPI外设
                                                            }

/***Dataflash_write2flash()*****连续写数据到SPI Flash内部**************/
Dataflash_write2flash(unsigned char* data, unsigned int  page,  unsigned int address,  unsigned int size, FLASH_BUFFER_NUM buffer_num)
{
   u16 i;

   if(SPI_Data_Flash_Busy_Detect()==0)  //==0 Data Flash空闲
      {
   SPI_Data_Flash_AT_SELECT(); //片选Dataflash
   if(buffer_num == FLASH_BUFFER1)
   SPI_ReadWrite_Byte(AT45DB_BUFFER_1_WRITE_FLASH );
   else
   SPI_ReadWrite_Byte(AT45DB_BUFFER_2_WRITE_FLASH);
   SPI_ReadWrite_Byte(page>>5);
   SPI_ReadWrite_Byte((page<<3)|(address>>8));
   SPI_ReadWrite_Byte(address);
   for (i=0; i<size; i++)
   SPI_ReadWrite_Byte(data);

   SPI_Data_Flash_AT_DESELECT();
                                                   }
                                                         }