DNW里面显示的USB协议怎么跟EBOOT里面的通过USB接收处理协议对不上?

wenqiang 2008-9-4 23:32 楼主

DNW里面显示的USB协议怎么跟EBOOT里面的通过USB接收处理协议对不上?

1>DNW里面的ABOUT菜单显示的为
      2. USB Tx format: addr(4)+size(4)+data(n)+cs(2)

2>C:\WINCE500\PLATFORM\COMMON\SRC\COMMON\BOOT\BLCOMMON＼blcommon.c里面的DownloadImage（　）函数里面对ＵＳＢ传来的ＮＫ数据的接收处理方式为

static BOOL DownloadImage (LPDWORD pdwImageStart, LPDWORD pdwImageLength, LPDWORD pdwLaunchAddr)
{

．．．．．．．

while (OEMReadData (sizeof (DWORD), (LPBYTE) &dwRecAddr) && //读地址
               OEMReadData (sizeof (DWORD), (LPBYTE) &dwRecLen)  && //读数据的长度
               OEMReadData (sizeof (DWORD), (LPBYTE) &dwRecChk))    //读校验码
         {




            // last record of .bin file uses sentinel values for address and checksum.
            if (!dwRecAddr && !dwRecChk)//2008--1--21  XQH  退出WHILE循环！！！
            {


                  break;
            }

            // map the record address (FLASH data is cached, for example)
            lpDest = OEMMapMemAddr (pCurDownloadFile->dwRegionStart, dwRecAddr);






            //2008--9--4 XQH 读数据块/包
            // read data block
            if (!OEMReadData (dwRecLen, lpDest))//2008--1--17  xqh  通过USB接口将接收到的数据写到映射的地址处，也就NAND FLASH处！！！
            {


                  EdbgOutputDebugString ("****** Data record %d corrupted, ABORT!!! ******\r\n", nPkgNum);
                  HALT (BLERR_CORRUPTED_DATA);
                  return (FALSE);
            }


            if (!VerifyChecksum (dwRecLen, lpDest, dwRecChk))//2008--1--17  XQH  计算每条记录的校验码！！！
            {



                  EdbgOutputDebugString ("****** Checksum failure on record %d, ABORT!!! ******\r\n", nPkgNum);
                  HALT (BLERR_CHECKSUM);
                  return (FALSE);
            }



            // Look for ROMHDR to compute ROM offset.  NOTE: romimage guarantees that the record containing
            // the TOC signature and pointer will always come before the record that contains the ROMHDR contents.
            //
            if (dwRecLen == sizeof(ROMHDR) && (*(LPDWORD) OEMMapMemAddr(pCurDownloadFile->dwRegionStart, pCurDownloadFile->dwRegionStart + ROM_SIGNATURE_OFFSET) == ROM_SIGNATURE))
            {


                  DWORD dwTempOffset = (dwRecAddr - *(LPDWORD)OEMMapMemAddr(pCurDownloadFile->dwRegionStart, pCurDownloadFile->dwRegionStart + ROM_SIGNATURE_OFFSET + sizeof(ULONG)));
                  ROMHDR *pROMHdr = (ROMHDR *)lpDest;



                  // Check to make sure this record really contains the ROMHDR.
                  //
                  if ((pROMHdr->physfirst == (pCurDownloadFile->dwRegionStart - dwTempOffset)) &&
                     (pROMHdr->physlast  == (pCurDownloadFile->dwRegionStart - dwTempOffset + pCurDownloadFile->dwRegionLength)) &&
                     (DWORD)(HIWORD(pROMHdr->dllfirst << 16) <= pROMHdr->dlllast) &&
                     (DWORD)(LOWORD(pROMHdr->dllfirst << 16) <= pROMHdr->dlllast))
                  {



                     g_dwROMOffset = dwTempOffset;
                     EdbgOutputDebugString("rom_offset=0x%x.\r\n", g_dwROMOffset);
                  }
            }



            // verify partial checksum
            OEMShowProgress (nPkgNum ++); //2008--1--17  XQH  显示NK下载的进度！！！

            if (fIsFlash)
            {



                  OEMContinueEraseFlash ();
            }






         }//WHILE循环！！！

｝

／／＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
那这两边不是对接不上吗？那ＮＫ是怎么通过ＵＳＢ传下来的？ＰＣ与ＡＲＭ通过什么样的ＵＳＢ协议进行ＮＫ的数据通信？这个ＵＳＢ通信的协议格式到底是什么？
还是我没理解好，谁清楚这一块啊，指导一下啊！