Re: [Dev-C++] get serial port info

Hi, Per,

  for your second method, i modified like this.  i doesn't solve the
problem.  the result is the same as before.
  for the first method, i tried to change strSerialList[i] =
(char*)(szPortName); to strSerialList[i] = strdup((char*)(szPortName));, but
it seems doesn't work too.  :-(

Regards,
Jessica

     do
     {
       Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, &Type,
                          szPortName, &dwSizeofPortName);
       if((Status == ERROR_SUCCESS) || (Status == ERROR_MORE_DATA))
       {
          strSerialList[i] = (char*)(szPortName);
          printf("%s\n",strSerialList[i]);
          i++;
       }
    } while((Status == ERROR_SUCCESS) || (Status == ERROR_MORE_DATA));
    RegCloseKey(hKey);

On Dec 19, 2007 2:44 PM, Per Westermark <pw...@ia...> wrote:

> 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?
> > > > > >
> > > > > >
> > > > > >
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> >
>
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