回复【7楼】fzhYou:
---------------------------------
soft

回复【6楼】fzhYou:
---------------------------------
#define Dummy_Byte 0xFF

/******************************************************************************************
*????????SPI_Init()
* ??????void
* ·???????void
* ??????SPIFLASH?????????????????÷??
*********************************************************************************************/
void SPI1_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
   SPI_InitTypeDef  SPI_InitStructure;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA ,ENABLE);
   GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);
   GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);
   GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
   GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
   GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

   SPI_I2S_DeInit(SPI1);
//SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
   SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;           //?????¤
   SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;                            //8??????????
   SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;                                    //??????????SCK??1
   SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;                                  //???????ù????2???±??±???????
   SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;                                     //NSS?í?????í
   SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;           //?¨????
   SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;                             //?ó??????
   SPI_InitStructure.SPI_CRCPolynomial = 7;                                       //CRC?à????
   SPI_InitStructure.SPI_Mode = SPI_Mode_Master;                                  //?÷?ú????
   SPI_Init(SPI1, &SPI_InitStructure);
   SPI_Cmd(SPI1, ENABLE);
}

/******************************************************************************************
*????????SPI_FLASH_SendByte()
* ??????u8 byte        ??????????
* ·???????u8 8??????
* ??????SPIFLASH????????×??????????????÷??
*********************************************************************************************/
u8 SPI_SendByte(u8 byte)
{
  /*????SPI·???????*/
  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
  /*·???8?????? */
  SPI_I2S_SendData(SPI1, byte);
 /* ????????8?????? */
  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
  /* ·?????????8?????? */
  return SPI_I2S_ReceiveData(SPI1);
}
/******************************************************************************************
*????????SPI_FLASH_ReadByte()
* ??????void
* ·???????u8 8??????
* ??????SPIFLASH??????×??????????????÷??
*********************************************************************************************/
u8 SPI_ReadByte(void)
{
  return (SPI_SendByte(Dummy_Byte));
}



/******************************************************************************************
*????????SPI_FLASH_SendHalfWord()
* ??????u16 HalfWord        ??????16??????
* ·???????u16 16??????
* ??????SPIFLASH????16?????????????????÷??
*********************************************************************************************/
u16 SPI_SendHalfWord(u16 HalfWord)
{
  /*????SPI·???????*/
  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
  /*·???16?????? */
  SPI_I2S_SendData(SPI1, HalfWord);
  /* ????????16?????? */
  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
  /* ·?????????16?????? */
  return SPI_I2S_ReceiveData(SPI1);
}

回复【9楼】ricefat:
---------------------------------
这种配置情况下，SPI模块会自动产生片选信号吗。