public void Start()
{
IsStart = true;
reTryCount = 0;
ReceiveStage = YmodemReceiveStage.WaitForFileInfo;
SendStage = YmodemSendStage.WaitReceiveRequestFileInfo;
TransThread = new Thread(new ThreadStart(TransThreadHandler));
TransThread.IsBackground = true;
TransThread.Name = "YmodemTransThread";
TransThread.Start();
if (ymodemInfo.TransMode == TransmitMode.Receive)
{
if (StartReceive != null)
{
StartReceive(ymodemInfo, null);
}
}
}
void SendHandler()
{
YmodemMessage msg;
if (msgQueue.Count > 0)
{
msg = msgQueue.Dequeue();
if (msg != null)
{
reTryCount = 0;
switch (msg.MessageType)
{
case YmodemMessageType.NAK:
if (SendStage == YmodemSendStage.WaitReceiveAnswerEndTransmit)
{
SendEOT();
}
else
{
// 通知重发
if (ReSendPacket != null)
{
ReSendPacket(ymodemInfo, null);
}
}
break;
case YmodemMessageType.KEY_C:
if (SendStage == YmodemSendStage.WaitReceiveRequestFileInfo)
{
// 通知发头一包CRC
if (StartSend != null)
{
StartSend(ymodemInfo, null);
}
}
else if (SendStage == YmodemSendStage.WaitReceiveRequestFirstPacket) //等待第一包
{
SendStage = YmodemSendStage.PacketSending;
// 通知发下一包
if (SendNextPacket != null)
{
SendNextPacket(ymodemInfo, null);
}
}
else if (SendStage == YmodemSendStage.WaitReceiveNextFileReq) //接收方请求下一个文件
{
SendNoFilesToSend();
}
break;
case YmodemMessageType.ACK:
if (SendStage == YmodemSendStage.WaitReceiveRequestFileInfo)
{
SendStage = YmodemSendStage.WaitReceiveRequestFirstPacket; //等待接收方请求第一包数据
}
else if (SendStage == YmodemSendStage.PacketSending)
{
// 通知发下一包
if (SendNextPacket != null)
{
SendNextPacket(ymodemInfo, null);
}
}
else if (SendStage == YmodemSendStage.WaitReceiveAnswerEndTransmit)
{
SendStage = YmodemSendStage.WaitReceiveNextFileReq; //等待接收方请求下一个文件
}
break;
case YmodemMessageType.CAN:
// 通知中止
if (AbortTransmit != null)
{
AbortTransmit(ymodemInfo, null);
}
break;
default:
break;
}
}
}
else
{
if (waitReceiveEvent.WaitOne(3000))
{
waitReceiveEvent.Reset();
}
else
{
reTryCount++;
if (reTryCount > RetryMax)
{
IsStart = false;
//通知接收超时
if (TransmitTimeOut != null)
{
TransmitTimeOut(ymodemInfo, null);
}
}
}
}
}
private void SendEOT()
{
SendFrameToUart(EOT);
SendStage = YmodemSendStage.WaitReceiveAnswerEndTransmit;
}
