串口11

   private void UpgradeFont(object o)
        {
            if (CheckUpdate())
            {
                dt = DateTime.Now;
                if (string.IsNullOrEmpty(FilePath) || !File.Exists(FilePath))
                {
                    ShowTip("文件路径为空");
                    return;
                }
                fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read);
                long m_FontLibFileLen = fs.Length;
                fileLen = m_FontLibFileLen;
                if (m_FontLibFileLen == 0)
                {
                    ShowTip("字库文件大小为:0");
                    return;
                }                byte[] byteArray = new byte[m_FontLibFileLen];
                fs.Read(byteArray, 0, (int)m_FontLibFileLen);
                int m_CurSndPos = 0;
                int m_CurSPI_Flash_Addr = 0;
                int m_LastSndLen = 0;
                if (m_FontLibFileLen < SEND_DATA_LEN_ONE_TIME)
                {
                    m_CurSndPos = 0; // 发送的位置在m_pBuffer中的偏移
                    m_LastSndLen = (int)m_FontLibFileLen;
                    SendFontDataToCom((uint)m_CurSPI_Flash_Addr, byteArray, (uint)m_LastSndLen);
                    sendLen += m_LastSndLen;
                    bIsFontLibInSending = true;
                }
                else
                {
                    m_CurSndPos = 0;
                    m_LastSndLen = SEND_DATA_LEN_ONE_TIME;
                    SendFontDataToCom((uint)m_CurSPI_Flash_Addr, byteArray, (uint)m_LastSndLen);
                    bIsFontLibInSending = true;
                    sendLen += m_LastSndLen;

  }
                int Range = (int)m_FontLibFileLen / (SEND_DATA_LEN_ONE_TIME); /* 文件长度 */
                if (Range == 0)    // 说明只需一步即可达到100%
                {
                    Range = 1;
                    TxtMsg = "上传完成";
                    bIsFontLibInSending = false;
                    return;
                }
                else if (Range > 0 && (m_FontLibFileLen % (SEND_DATA_LEN_ONE_TIME)) != 0)
                {
                    Range += 1;
                }
                TxtMsg = string.Empty;
                startTime = DateTime.Now;
                endTime = DateTime.Now;
                byte[] AckCmdBuf = new byte[256];

 T = new Thread(new ThreadStart(() =>
                {
                    for (int i = 1; i < Range; i++)
                    {
                        Thread.Sleep(2);
                        int ackCmdLen = GetAckCmdBuf(ref AckCmdBuf, 256);
                        if (ackCmdLen == 0)
                        {
                            endTime =System.DateTime.Now;
                            TimeSpan timeSpan = endTime - startTime;     // 两个CTime相减得到CTimeSpan
                            double nTSeconds = timeSpan.TotalSeconds;                // 得到总的秒数
                            if (nTSeconds > ACK_TIME_OUT)
                            {
                                bIsFontLibInSending = false;
                                m_CurSndPos = 0;
                                m_LastSndLen = 0;
                                m_CurSPI_Flash_Addr = 0;
                                TxtMsg="字库升级超时失败!";
                                return;
                

       }
                        }

                        if (i != (Range - 1))
                        {
                            sendLen += m_LastSndLen;
                            SendFontDataToCom((uint)i * 256, byteArray, (uint)m_LastSndLen);
                            Application.Current.Dispatcher.Invoke(() =>
                            {
                                TxtMsg = $"{sendLen}/{fileLen}";
                                ProMax = (int)fileLen;
                                ProVal = (int)sendLen;
                                ProVisual = Visibility.Visible;
                            });
                        }

 else
                        {
                            int lastLen = (int)(m_FontLibFileLen % 256);
                            if (lastLen == 0)
                                lastLen = 256;
                            sendLen += lastLen;
                            SendFontDataToCom((uint)i * 256, byteArray, (uint)lastLen);
                            endTime = DateTime.Now;
                            TimeSpan timeSpan = endTime - startTime;     // 两个CTime相减得到CTimeSpan
                            double nTSeconds = timeSpan.TotalSeconds;
                            Application.Current.Dispatcher.Invoke(() =>
                            {
                                TxtMsg = $"上传完成耗时:{ Math.Round(nTSeconds, 0)}秒 ({sendLen}/{fileLen})";
                                ProVal = Math.Min((int)sendLen, (int)fileLen);
                                ProVisual = Visibility.Hidden;
                                bIsFontLibInSending = false;

         sendLen = 0;
                            });
                        }
                    }
                }));
                T.Start();
            }
        }