From: Per W. <pw...@ia...> - 2007-12-19 19:44:38
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The test code is buggy. It uses the same buffer to retrieve the device names, which means that the name will be overwritten. A quicky (with a memory leak that doesn't matter here) is to do strSerialList[i] = strdup((char*)szPortName); Another alternative is to print the devices one-by-one directly when they are found. /pwm On Wed, 19 Dec 2007, Jessica Chen wrote: > Name Type Data > (Default) REG_SZ (value not set) > \Device\Serial0 REG_SZ COM1 > \Device\U2SPORT1 REG_SZ COM7 > > if i used on my computer, i can see: > COM1 > COM1 > > when i used my .exe on my colleagues computer. > he has 2 serial port and 1 usb->serial. > but we can only see "COM4" for 3 times. > > so at least, the code can recognize how many COM on computer, whatever real > com port or usb-com. > but cannot read right com port number. > > > On Dec 19, 2007 1:57 PM, Rafael Menezes <so...@gm...> wrote: > > > Hi Jessica. > > > > Can you, for start, list what is on "HARDWARE\\DEVICEMAP\\SERIALCOMM" in > > your computer? > > > > Regards > > Rafael > > > > > > On 19/12/2007, Jessica Chen <jes...@gm...> wrote: > > > > > > Hi, thanks for ur email, Rafael. > > > > > > I researched myself. > > > I wrote a code. I will list it as follows. > > > The problem seems it can recognize the real serial com port (Com 1 in my > > > computer, registry). > > > But on my computer, I have a USB->serial com port (Com 7 in my > > > computer, registry). > > > The code cannot recognize the USB->serial com port. > > > Is there any experienced persons can give any idea about that? > > > > > > #include <windows.h> > > > #include <stdio.h> > > > #include <tchar.h> > > > > > > int main(void) > > > { > > > char *strSerialList[256]; > > > HKEY hKey; > > > > > > if( RegOpenKeyEx(HKEY_LOCAL_MACHINE, > > > TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"), > > > 0, > > > KEY_READ, > > > &hKey) != ERROR_SUCCESS) > > > { > > > return -1; > > > } > > > > > > int i=0; > > > CHAR Name[25]; > > > UCHAR szPortName[25]; > > > LONG Status; > > > DWORD dwIndex = 0; > > > DWORD dwName; > > > DWORD dwSizeofPortName; > > > DWORD Type; > > > dwName = sizeof(Name); > > > dwSizeofPortName = sizeof(szPortName); > > > > > > do > > > { > > > Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, > > > &Type, > > > szPortName, &dwSizeofPortName); > > > if((Status == ERROR_SUCCESS) || (Status == ERROR_MORE_DATA)) > > > { > > > strSerialList[i] = (char*)(szPortName); > > > i++; > > > } > > > } while((Status == ERROR_SUCCESS) || (Status == ERROR_MORE_DATA)); > > > RegCloseKey(hKey); > > > > > > for(int j=0;j<i;j++) > > > { > > > printf("%s\n",strSerialList[j]); > > > } > > > > > > return 0; > > > } > > > > > > > > > On Dec 19, 2007 12:34 PM, Rafael Menezes <so...@gm...> wrote: > > > > > > > You can send mails. Can you search on google? > > > > > > > > http://www.google.com.br/search?hl=pt-BR&q=c%2B%2B+com+port&meta = > > > > > > > > http://www.google.com.br/search?num=30&hl=pt-BR&q=c%2B%2B+serial+port&meta > > > > = > > > > > > > > > > > > On 19/12/2007, Jessica Chen <jes...@gm... > wrote: > > > > > > > > > is there anyone have the experience for writing code of getting the > > > > > serial port info from windows? > > > > > can u give me an sample code? > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > > SF.Net email is sponsored by: > > > > > Check out the new SourceForge.net Marketplace. > > > > > It's the best place to buy or sell services > > > > > for just about anything Open Source. > > > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > > > > > > > > > _______________________________________________ > > > > > Dev-cpp-users mailing list > > > > > Dev...@li... > > > > > TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm > > > > > https://lists.sourceforge.net/lists/listinfo/dev-cpp-users > > > > > > > > > > > > > > > > > > > > > > -- > > > > Regards > > > > Rafael Menezes > > > > > > > > > > > > > > > -- > > Regards > > Rafael Menezes > |