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#include <iostream>
#include <windows.h>
using namespace std;
HANDLE hMutex;
DWORD WINAPI Read(LPVOID lpParamter)
{
//打开端口
HANDLE hCom = CreateFileA("com7", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0);
//设置超时
COMMTIMEOUTS timeouts;
GetCommTimeouts(hCom, &timeouts);
timeouts.ReadIntervalTimeout = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 1;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts(hCom, &timeouts))
{
cout<<"超时设置失败!重新";
CloseHandle(hCom);
return 0;
}
//取得并设置端口状态
DCB dcb;
GetCommState(hCom, &dcb);
dcb.DCBlength = sizeof(DCB);
dcb.BaudRate = 9600;
dcb.Parity = 0;
dcb.ByteSize = 8;
dcb.StopBits = ONESTOPBIT;
if (!SetCommState(hCom, &dcb))
{
cout<<"端口状态设置失败!重新";
CloseHandle(hCom);
return 0;
}
char buffer[1024];
DWORD readsize,dwError;
BOOL bReadStatus;
COMSTAT cs;
WaitForSingleObject(hMutex, INFINITE);
while(1)
{
readsize = 0;
ClearCommError(hCom,&dwError,&cs);//取得状态
//数据是否大于所准备缓冲区
if(cs.cbInQue>sizeof(buffer))
{
PurgeComm(hCom,PURGE_RXCLEAR);//清除通信端口数据
return 0;
}
memset(buffer, 0 , sizeof(buffer));
bReadStatus = ReadFile(hCom, buffer, cs.cbInQue, &readsize, 0);
if(readsize>0)
{
cout<<cs.cbInQue;
buffer[cs.cbInQue]='\0';
std::cout<<buffer;
}
Sleep(5);
}
ReleaseMutex(hMutex);
CloseHandle(hCom);
}
void main()
{
HANDLE hThread = CreateThread(NULL, 0, Read, NULL, 0, NULL);
hMutex = CreateMutex(NULL, FALSE, NULL);
CloseHandle(hThread);
while(1)
Sleep(1000);
}
void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}