u8 FTL_BlockCompare(u32 blockx,u32 cmpval)
{
u8 res;
u16 i,j,k;
for(i=0;i<3;i++)//允许3次机会
{
  for(j=0;j<nand_dev.block_pagenum;j++)
  {
   NAND_ReadPageComp(blockx*nand_dev.block_pagenum,0,cmpval,nand_dev.page_mainsize/4,&k);//检查一个page,并与0XFFFFFFFF对比
   if(k!=(nand_dev.page_mainsize/4))break;
  }
  if(j==nand_dev.block_pagenum)return 0;  //检查合格,直接退出
  res=NAND_EraseBlock(blockx);
  if(res)printf("error erase block:%d ",i);
  else
  {
   if(cmpval!=0XFFFFFFFF)//不是判断全1,则需要重写数据
   {
    for(k=0;k<nand_dev.block_pagenum;k++)
    {
     NAND_WritePageConst(blockx*nand_dev.block_pagenum+k,0,0,nand_dev.page_mainsize/4);//写PAGE
    }
   }
  }
}
printf("bad block checked:%d ",blockx);
return 1;
}

@正点原子   原子哥标记的这个是不是要加上+j，不然后面的63个page就没检测到了