FLASH_ID = SPI_FLASH_ReadID();  u32 SPI_FLASH_ReadID(void) {  u32 Temp = 0, Temp0 = 0, Temp1 = 0, Temp2 = 0, Temp3;
  /* Select the FLASH: Chip Select low */  SPI_FLASH_CS_LOW();  
  /* Send "RDID " instruction */  SPI_FLASH_SendByte(0x9F);   /**--------------------------------**/
  /* Read a byte from the FLASH */  Temp0 = SPI_FLASH_SendByte(Dummy_Byte);
  /* Read a byte from the FLASH */  Temp1 = SPI_FLASH_SendByte(Dummy_Byte);
  /* Read a byte from the FLASH */  Temp2 = SPI_FLASH_SendByte(Dummy_Byte);
  /* Read a byte from the FLASH */  Temp3 = SPI_FLASH_SendByte(Dummy_Byte);  /*** 0xff */    /* Deselect the FLASH: Chip Select high */  SPI_FLASH_CS_HIGH();     Temp = (Temp0 << 24) | (Temp1 << 16) | (Temp2<<8) | Temp3;  return Temp;}0x9f从哪里来? 此帖出自小平头技术问答