private ReceiveResult ReceiveSFOrFF(int hostId, List <byte[]> frames)
{
Message message = ReceiveMessage();
if (message != null)
{
byte pci = message.Data[0];
Debug.Assert(DcmTpProtocalISO15765Packer.IsSingleFrame(pci) ||
DcmTpProtocalISO15765Packer.IsFirstFrame(pci), "DcmTpProtocalISO15765Receiver" +
"->ReceiveSFOrFF: Not Single Frame Or First Frame");
frames.Clear();
frames.Add(message.Data);
if (DcmTpProtocalISO15765Packer.IsSingleFrame(pci))
{
return(ReceiveSuccess);
}
else if (DcmTpProtocalISO15765Packer.IsFirstFrame(pci))
{
HostId = hostId;
int totalLen = (((message.Data[0] & 0x0f) << 8) + message.Data[1]);
LeftConsecutiveFrameCount = (totalLen - 6) / 7
+ ((((totalLen - 6) % 7) != 0) ? 1 : 0);
Frames = frames;
WorkState = WorkStateEnum.SendFlowControlFrame;
//立即发送流控制帧
SendFlowControl();
}
}
return(ReceiveResult.Working);
}
// 发送单帧或者第一帧
private SendResult SendSFOrFF(int canId, List <byte[]> frames)
{
Debug.Assert(frames.Count > 0, "DcmTpProtocalISO15765Sender: Invalid SFOrFF");
byte pci = frames[0][0];
Debug.Assert(DcmTpProtocalISO15765Packer.IsSingleFrame(pci) ||
DcmTpProtocalISO15765Packer.IsFirstFrame(pci));
var result = SendMessage(canId, frames[0]);
if (DcmTpProtocalISO15765Packer.IsSingleFrame(pci)) // 单帧
{
Reset();
return(result ? SendResult.Ok : SendResult.Fail);
}
else if (DcmTpProtocalISO15765Packer.IsFirstFrame(pci)) //多帧
{
if (!result)
{
return(SendFailed);
}
else
{
// 进入等待流控制帧状态
CanId = canId;
Frames = frames;
WorkState = WorkStateEnum.WaitFlowControlFrame;
FrameIndex = 1;
return(SendResult.Working);
}
}
else
{
return(SendFailed);
}
}