//页分组，对一组写数据
 uint32_t Flash_Write_r(uint8_t* pBuffer,uint32_t num, uint16_t NumByteToWrite_r)
{     
   uint32_t num_buf=num;    
 uint16_t i; 
 uint16_t paddr,offaddr;

 paddr = num_buf/(SPI_FLASH_PageSize/NUMByte) + page_f;
 offaddr = (num_buf%(SPI_FLASH_PageSize/NUMByte))*NUMByte;

 if(paddr>=SPI_FLASH_PageNum)return 0;
 if(NumByteToWrite_r <= NUMByte)
 {    
          F_CS_DISABLE();  
          DF_mm_to_buf(1,paddr);
        if(DF_wait_busy()==0)return 0;
        F_CS_ENABLE();
        SPI1_ReadWriteByte(BUFFER_1_WRITE);    
        SPI1_ReadWriteByte(0x00);
        SPI1_ReadWriteByte((uint8_t)(offaddr>>8)); 
        SPI1_ReadWriteByte((uint8_t)offaddr);
      for (i=0;i<NumByteToWrite_r;)
        {   
       SPI1_ReadWriteByte(*pBuffer);
       pBuffer++;
       i++;
  }
      }
 F_CS_DISABLE();       
 DF_buf_to_mm(1,paddr); 
 num_buf = num_buf + 1;
  
return num_buf;//统计写次数，这样可以算出来页地址和偏移地址  
}
这程序不可以对当前页的首地址写数据吗？为什么读不来额？
//读取一组数据
void Flash_Read_r(uint8_t* pBuffer, uint32_t num_start,uint16_t NumByteToRead_r)
{
uint16_t offaddr,paddr;
uint32_t i;
paddr = (num_start/(SPI_FLASH_PageSize/NUMByte)) + page_f;
offaddr = (num_start%(SPI_FLASH_PageSize/NUMByte))*NUMByte;

if(NumByteToRead_r > NUMByte) return;
DF_mm_to_buf(1,paddr);     
if(DF_wait_busy()==0)return;
F_CS_ENABLE();
SPI1_ReadWriteByte(BUFFER_1_READ);
SPI1_ReadWriteByte(0x00);
SPI1_ReadWriteByte((uint8_t)(offaddr>>8));
SPI1_ReadWriteByte((uint8_t)offaddr);
SPI1_ReadWriteByte(0x00);

for (i=0;i<NumByteToRead_r;)
{ 
 *pBuffer=SPI1_ReadWriteByte(0xff);
  pBuffer++;
  i++;  
}
F_CS_DISABLE();    
} 
我用FOR语句写75组数据，然后再用FOR语句读取75条数据，发现每一页的首地址丢失，但是我调用读函数，只读当前页的首地址有时可以显示的有时不可以显示，原子哥，这是为什么？谢谢