本文主要是介绍LabWindows多线程实现串口读写，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
多线程方式，实现串口读写
#include <rs232.h>
#include <utility.h>
#include "toolbox.h"
#include <cvirte.h>
#include <userint.h>#include <WxpFunction.h>
#include "mainWindow.h"//线程开始标记，值为1时开始多线程
int threadID=0;static int startflag = 0;
//传递所创建线程的callbackData参数
static void *threadfunctiondata = "这是一个多线程的示例！";
//声明多线程回调函数
int CVICALLBACK ThreadFunction (void *functionData);static int panelHandle;int portNum = 3;
int baudRate = 19200;
int parity = 0;
int dataBits = 7;
int stopBits = 1;
int portOpenFlag = 0;int sendDataLen = 0;
char sendData[512];
volatile int sendDataFlag = 0;char receiveData[513];
int receiveLen=0;
volatile int packetComDataFlag = 0;int main (int argc, char *argv[])
{if (InitCVIRTE (0, argv, 0) == 0)return -1; /* out of memory */if ((panelHandle = LoadPanel (0, "mainWindow.uir", MainPanel)) < 0)return -1;//创建一个线程函数CmtScheduleThreadPoolFunction (DEFAULT_THREAD_POOL_HANDLE,ThreadFunction, threadfunctiondata, &threadID);DisplayPanel (panelHandle);//设置STRIPCHART属性标题SetTraceAttributeEx(panelHandle, PANEL_STRIPCHART,1,ATTR_TRACE_LG_TEXT,"通道1"); RunUserInterface ();//等待线程执行，直到结束CmtWaitForThreadPoolFunctionCompletionEx (DEFAULT_THREAD_POOL_HANDLE, threadID,OPT_TP_PROCESS_EVENTS_WHILE_WAITING, CMT_WAIT_FOREVER);//释放线程函数CmtReleaseThreadPoolFunctionID (DEFAULT_THREAD_POOL_HANDLE, threadID);DiscardPanel (panelHandle);return 0;
}//多线程回调函数
int CVICALLBACK ThreadFunction(void *functionData)
{double result;while(startflag == 1){result = Random(-10,10);Delay(0.02);//发送数据if(sendDataFlag==1){ComWrt(portNum,sendData,sendDataLen);sendDataFlag=0;// FlushOutQ(portNum);}//接收数据receiveLen = GetInQLen(portNum);if(receiveLen > 0){//超过512字节，则按512字节接收；//没有超过，则按实际字节数接收；if(receiveLen > 512)receiveLen=512;ComRd(portNum,receiveData,receiveLen);//FlushInQ(portNum);SetCtrlVal(panelHandle,MainPanel_ReceiveData,receiveData);}}//退出时，关闭串口CloseCom(portNum);return 0;
}int CVICALLBACK mainFunction (int panel, int event, void *callbackData,int eventData1, int eventData2)
{switch (event){case EVENT_GOT_FOCUS:break;case EVENT_LOST_FOCUS:break;case EVENT_CLOSE:startflag=0;QuitUserInterface(0);break;}return 0;
}int CVICALLBACK SendData (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)
{switch (event){case EVENT_COMMIT:if(startflag==1){GetCtrlVal(panelHandle,MainPanel_SendData,sendData);sendDataLen = strlen(sendData);sendDataFlag = 1;}elseMessagePopup("提醒","请先打开串口");break;}return 0;
}int CVICALLBACK TimerFunction (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)
{switch (event){case EVENT_TIMER_TICK:WxpIntTest= rand();char tt[100];sprintf(tt,"%d",Declare_Your_Functions_Here (rand())) ;SetCtrlVal(panelHandle,MainPanel_SendData,tt);SetCtrlVal(panelHandle,MainPanel_waterwww,sqrt(rand()%100));break;}return 0;
}int CVICALLBACK ConfigSerial (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)
{switch (event){case EVENT_COMMIT:int ret = OpenComConfig(portNum,"",baudRate,parity,dataBits,stopBits,512,512);char tt[300];sprintf(tt,"%s",GetRS232ErrorString(ret) );if(ret < 0){portOpenFlag = 0;MessagePopup("msg",tt);}else{MessagePopup("msg","success");portOpenFlag = 1;startflag = 1; //线程标志位 值为1时，表示线程开始CmtScheduleThreadPoolFunction (DEFAULT_THREAD_POOL_HANDLE,ThreadFunction, threadfunctiondata, &threadID);SetCtrlAttribute(panelHandle,MainPanel_COMMANDBUTTON_2,ATTR_VISIBLE,0);// SetCtrlAttribute(panelHandle,MainPanel_COMMANDBUTTON_2,ATTR_ENABLED,1);}break;}return 0;
}
增加一个串口获取函数
//==========================================================================
/*#include <windows.h>#include <winreg.h>* 功 能: 通过访问注册表获得串口号。* 参 数：二维数组用来存放返回数组 * 返回值：返回-1失败，返回0成功*/
static int GetComNum(char strSerialList[256][25], int *comNum)
{char Name[25];int i = 0;unsigned char szPortName[25];long Status = 0.0;int dwIndex = 0;int dwName;int dwSizeofPortName;int Type;HKEY hKey; //返回注册表项的句柄if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, "HARDWARE\\DEVICEMAP\\SERIALCOMM\\", 0, KEY_READ, &hKey) != ERROR_SUCCESS) //打开注册表return -1;dwName = sizeof(Name);dwSizeofPortName = sizeof(szPortName);while((Status == ERROR_SUCCESS)||(Status == ERROR_MORE_DATA)){Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, &Type, szPortName, &dwSizeofPortName); //列举注册表的值if((Status == ERROR_SUCCESS)||(Status == ERROR_MORE_DATA)){strcpy(strSerialList[i], (const char*)szPortName); // 串口字符串保存i++;}dwName = sizeof(Name); dwSizeofPortName = sizeof(szPortName); }*comNum = i;RegCloseKey(hKey); //关闭注册表return 0;
}int CVICALLBACK GetComm (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)
{switch (event){case EVENT_COMMIT:// string str;char tt[20];char strSerialList[256][25];int comNum;int k=GetComNum(strSerialList,&comNum);sprintf(tt,"%d",comNum);if(k==-1)MessagePopup("notice","no com");else{for(int i=0;i< comNum;i++)MessagePopup("notice",strSerialList[i]); }break;}return 0;
}
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