C#编程_软件定时器和线程等待的区别-摩杜云开发者社区

本人经验之谈，高手勿喷。

软件定时器可以实现严格的时间执行；

线程中使用等待指定毫秒数，并不能达到准确。

1.定时器等到

private void ReadMessages()
    {
        CAN_OBJ mMsg = new CAN_OBJ();

        int sCount = 0;
        do
        {
            uint mLen = 1;
            //if (!((ECANDLL.Receive(1, 0, 0, out mMsg, mLen, 1) == ECANStatus.STATUS_OK) ))
            if (!(ECANDLL.Receive(1, 0, 0, out mMsg, mLen, 1) == ECANStatus.STATUS_OK))
            {
                break;
            }
            if (mLen == 0) break;
            if (mMsg.ID == 0) break;

            string shows = "POS_Can1Stt_Rece:"+POS_Can1Stt_Rece.ToString() + " mLen:" + mLen .ToString()+ " CAN1 Rece " + " Time:" + DateTime.Now.ToLocalTime().ToString("yyyy/MM/dd-HH.mm.ss.fff") + " " + DD01.can2string((int)mMsg.ID, mMsg.data, mMsg.ExternFlag, mMsg.RemoteFlag, mMsg.DataLen);
            //if (PrintRece_Debug == 1)
            { System.Console.Write(shows); }
            Can1Stt_Rece[POS_Can1Stt_Rece].TIME = DateTime.Now.ToLocalTime();                   //保存接收到CAN报文的时间
            Can1Stt_Rece[POS_Can1Stt_Rece].ID = (int)mMsg.ID;
            Can1Stt_Rece[POS_Can1Stt_Rece].LEN = mMsg.DataLen;
            Can1Stt_Rece[POS_Can1Stt_Rece].IDE = mMsg.ExternFlag;
            Can1Stt_Rece[POS_Can1Stt_Rece].RTR = mMsg.RemoteFlag;
            Can1Stt_Rece[POS_Can1Stt_Rece].COUNT = 1;
            for (int i = 0; i < 8; i++) { Can1Stt_Rece[POS_Can1Stt_Rece].DATA[i] = mMsg.data[i]; }

            DD01.cancopy(Can1Stt_Rece[POS_Can1Stt_Rece].ID, Can1Stt_Rece[POS_Can1Stt_Rece].DATA, Can1Stt_Rece[POS_Can1Stt_Rece].IDE, Can1Stt_Rece[POS_Can1Stt_Rece].RTR, Can1Stt_Rece[POS_Can1Stt_Rece].LEN, Can1Stt_Rece[POS_Can1Stt_Rece].TIME, Can1Stt_Rece[POS_Can1Stt_Rece].COUNT,
                     ref Can1Stt_Show[POS_Can1Stt_Show].ID, ref Can1Stt_Show[POS_Can1Stt_Show].DATA, ref Can1Stt_Show[POS_Can1Stt_Show].IDE, ref Can1Stt_Show[POS_Can1Stt_Show].RTR, ref Can1Stt_Show[POS_Can1Stt_Show].LEN, ref Can1Stt_Show[POS_Can1Stt_Show].TIME, ref Can1Stt_Show[POS_Can1Stt_Show].COUNT);   //复制到显示变量
            POS_Can1Stt_Rece++; if (POS_Can1Stt_Rece > MAX_RECE) { POS_Can1Stt_Rece = 0; }       //防止接收数据越界
            POS_Can1Stt_Show++; if (POS_Can1Stt_Show > MAX_RECE) { POS_Can1Stt_Show = 0; }       //防止接收数据越界
            Count_Can1Rece++;
        }
        while (sCount < 500);

    }

2.线程等待

public void rece_while()
        {
            while (true)
            {
                System.Threading.Thread.Sleep(1);                                                       //经验：这个延时不能放在循环体的最前面，否则win10闪退
                CAN_OBJ mMsg = new CAN_OBJ();//CAN_OBJ[] mMsg = new CAN_OBJ[1024]
                if (ECANDLL.Receive(1, 0, 0, out mMsg, 1, 1) == ECANStatus.STATUS_OK)
                {
                    string shows = "CAN1 Rece " + " Time:" + DateTime.Now.ToLocalTime().ToString("yyyy/MM/dd-HH.mm.ss.fff") + " " + DD01.can2string((int)mMsg.ID, mMsg.data, mMsg.ExternFlag, mMsg.RemoteFlag, mMsg.DataLen);
                    if (PrintRece_Debug == 1) { System.Console.Write(shows); }
                    Can1Stt_Rece[POS_Can1Stt_Rece].TIME = DateTime.Now.ToLocalTime();                   //保存接收到CAN报文的时间
                    Can1Stt_Rece[POS_Can1Stt_Rece].ID = (int)mMsg.ID;
                    Can1Stt_Rece[POS_Can1Stt_Rece].LEN = mMsg.DataLen;
                    Can1Stt_Rece[POS_Can1Stt_Rece].IDE = mMsg.ExternFlag;
                    Can1Stt_Rece[POS_Can1Stt_Rece].RTR = mMsg.RemoteFlag;
                    Can1Stt_Rece[POS_Can1Stt_Rece].COUNT = 1;
                    for (int i = 0; i < 8; i++) { Can1Stt_Rece[POS_Can1Stt_Rece].DATA[i] = mMsg.data[i]; }

                    DD01.cancopy(Can1Stt_Rece[POS_Can1Stt_Rece].ID, Can1Stt_Rece[POS_Can1Stt_Rece].DATA, Can1Stt_Rece[POS_Can1Stt_Rece].IDE, Can1Stt_Rece[POS_Can1Stt_Rece].RTR, Can1Stt_Rece[POS_Can1Stt_Rece].LEN, Can1Stt_Rece[POS_Can1Stt_Rece].TIME, Can1Stt_Rece[POS_Can1Stt_Rece].COUNT,
                        ref Can1Stt_Show[POS_Can1Stt_Show].ID, ref Can1Stt_Show[POS_Can1Stt_Show].DATA, ref Can1Stt_Show[POS_Can1Stt_Show].IDE, ref Can1Stt_Show[POS_Can1Stt_Show].RTR, ref Can1Stt_Show[POS_Can1Stt_Show].LEN, ref Can1Stt_Show[POS_Can1Stt_Show].TIME, ref Can1Stt_Show[POS_Can1Stt_Show].COUNT);   //复制到显示变量
                    POS_Can1Stt_Rece++;
                    POS_Can1Stt_Show++;
                    Count_Can1Rece++;
                }

                CAN_OBJ mMsg2 = new CAN_OBJ();//CAN_OBJ[] mMsg = new CAN_OBJ[1024]
                if (ECANDLL.Receive(1, 0, 1, out mMsg2, 1, 1) == ECANStatus.STATUS_OK)
                {
                    string shows = "CAN2 Rece " + " Time:" + DateTime.Now.ToLocalTime().ToString("yyyy/MM/dd-HH.mm.ss.fff") + " " + DD01.can2string((int)mMsg2.ID, mMsg2.data, mMsg2.ExternFlag, mMsg2.RemoteFlag, mMsg2.DataLen);
                    if (PrintRece_Debug == 1) { System.Console.Write(shows); }
                    Can2Stt_Rece[POS_Can2Stt_Rece].TIME = DateTime.Now.ToLocalTime();                   //保存接收到CAN报文的时间
                    Can2Stt_Rece[POS_Can2Stt_Rece].ID = (int)mMsg2.ID;
                    Can2Stt_Rece[POS_Can2Stt_Rece].LEN = mMsg2.DataLen;
                    Can2Stt_Rece[POS_Can2Stt_Rece].IDE = mMsg2.ExternFlag;
                    Can2Stt_Rece[POS_Can2Stt_Rece].RTR = mMsg2.RemoteFlag;
                    Can2Stt_Rece[POS_Can2Stt_Rece].COUNT = 1;
                    for (int i = 0; i < 8; i++) { Can2Stt_Rece[POS_Can2Stt_Rece].DATA[i] = mMsg2.data[i]; }

                    DD01.cancopy(Can2Stt_Rece[POS_Can2Stt_Rece].ID, Can2Stt_Rece[POS_Can2Stt_Rece].DATA, Can2Stt_Rece[POS_Can2Stt_Rece].IDE, Can2Stt_Rece[POS_Can2Stt_Rece].RTR, Can2Stt_Rece[POS_Can2Stt_Rece].LEN, Can2Stt_Rece[POS_Can2Stt_Rece].TIME, Can2Stt_Rece[POS_Can2Stt_Rece].COUNT,
                        ref Can2Stt_Show[POS_Can2Stt_Show].ID, ref Can2Stt_Show[POS_Can2Stt_Show].DATA, ref Can2Stt_Show[POS_Can2Stt_Show].IDE, ref Can2Stt_Show[POS_Can2Stt_Show].RTR, ref Can2Stt_Show[POS_Can2Stt_Show].LEN, ref Can2Stt_Show[POS_Can2Stt_Show].TIME, ref Can2Stt_Show[POS_Can2Stt_Show].COUNT);   //复制到显示变量
                    POS_Can2Stt_Rece++;
                    POS_Can2Stt_Show++;
                    Count_Can2Rece++;
                }
                //Console.WriteLine("Can1Stt_Send_Thread.COUNT:{0} Can1Send_TimeNeed_Thread:{1} Can1Send_Space_Thread:{2} Can1Send_SpaceCount_Thread:{3}", Can1Stt_Send_Thread.COUNT, Can1Send_TimeNeed_Thread, Can1Send_Space_Thread, Can1Send_SpaceCount_Thread);
            }

        }

总结：

以上两种方式均可以实现一直接收数据；

第一种适用对读取速度严格要求的场景‘

第二种适用实时性要求低的场景。