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

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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> > > > >
> > > >
> > > >
> > > > --
> > > > Regards
> > > > Rafael Menezes
> > >
> > >
> > >
> >
> >
> > --
> > Regards
> > Rafael Menezes
>