Thread: [Dev-C++] get serial port info
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From: Jessica C. <jes...@gm...> - 2007-12-19 15:54:14
|
is there anyone have the experience for writing code of getting the serial port info from windows? can u give me an sample code? |
|
From: Rafael M. <so...@gm...> - 2007-12-19 18:57:56
|
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
|
|
From: Jessica C. <jes...@gm...> - 2007-12-19 19:18:38
|
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
|
|
From: Per W. <pw...@ia...> - 2007-12-19 19:44:38
|
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
>
|
|
From: Jessica C. <jes...@gm...> - 2007-12-19 20:10:48
|
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?
> > > > > >
> > > > > >
> > > > > >
> -------------------------------------------------------------------------
> > > > > >
> > > > > > 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
> >
>
>
|
|
From: Per W. <pw...@ia...> - 2007-12-19 23:02:28
|
On an old test machine I have, the original code produces:
COM1
COM1
COM1
COM1
COM1
COM1
After adding strdup(), I get:
COM5
COM6
COM7
COM7
COM4
COM1
Are you sure that your change was correct, and that you remembered to
recompile?
One interesting thing here is that COM7 is printed twice, while my much
used COM3 is not enumerated.
The two COM7 seems to be a stupid M$ bug with an USB serial adapter :(
/pwm
On Wed, 19 Dec 2007, Jessica Chen wrote:
> 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
> > >
i> > > 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
> > >
> >
> >
>
|
|
From: Jessica C. <jes...@gm...> - 2007-12-20 14:04:17
|
Hi, Per,
Thanks. I asked my friend to see. He gave me the suggestion. The
RegEnumValue can recognize the com and USB->COM. The problem solved now, I
got the correct result: COM1(com), COM7(usb->com). In front of
RegEnumValue, add:
dwName = sizeof(Name);
dwSizeofPortName = sizeof(szPortName);
So the whole code is as follows (a bug in it: didn't release memalloc, but
doesn't influence the result here).
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
int main(void)
{
int z;
char *strSerialList[256];
for (z=0; z<=256; z++)
{
strSerialList[z] = (char*)malloc(4096*sizeof(char));
}
HKEY hKey;
if( RegOpenKeyEx(HKEY_LOCAL_MACHINE,
TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
0,
KEY_READ,
&hKey) != ERROR_SUCCESS)
{
return -1;
}
int i=0;
CHAR Name[4096];
UCHAR szPortName[4096];
LONG Status;
DWORD dwIndex = 0;
DWORD dwName;
DWORD dwSizeofPortName;
DWORD Type;
dwName = sizeof(Name);
dwSizeofPortName = sizeof(szPortName);
do
{
dwName = sizeof(Name);
dwSizeofPortName = sizeof(szPortName);
Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, &Type,
szPortName, &dwSizeofPortName);
printf("Name=%s,szPortName=%s \n", Name, szPortName);
if((Status == ERROR_SUCCESS) )
{
strcpy(strSerialList[i],(char*)szPortName);
//strSerialList[i] = (char*) szPortName;
printf("%s ",strSerialList[i]);
printf("i=%d,dwIndex=%d\n",i,dwIndex);
i++;
}
} while((Status == ERROR_SUCCESS) );
RegCloseKey(hKey);
printf("\n\n");
for(int j=0;j<i;j++)
{
printf("%s\n",strSerialList[j]);
}
return 0;
}
On Dec 19, 2007 6:02 PM, Per Westermark <pw...@ia...> wrote:
> On an old test machine I have, the original code produces:
> COM1
> COM1
> COM1
> COM1
> COM1
> COM1
>
> After adding strdup(), I get:
> COM5
> COM6
> COM7
> COM7
> COM4
> COM1
>
> Are you sure that your change was correct, and that you remembered to
> recompile?
>
> One interesting thing here is that COM7 is printed twice, while my much
> used COM3 is not enumerated.
>
> The two COM7 seems to be a stupid M$ bug with an USB serial adapter :(
>
> /pwm
>
> On Wed, 19 Dec 2007, Jessica Chen wrote:
>
> > 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
> > > >
> i> > > 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
> > > >
> > >
> > >
> >
>
>
|
|
From: Per W. <pw...@ia...> - 2007-12-20 14:23:57
|
Now, you are preallocating 4096 bytes for 256 serial ports. That is 1MB of
memory. That is not something you want in production code.
My change with strdup() would have performed a strlen() + an optimum-sized
malloc() + memcpy() for any detected serial ports, i.e. it will end up
needing at the most a couple of hundred bytes of memory for the names.
/pwm
On Thu, 20 Dec 2007, Jessica Chen wrote:
> Hi, Per,
>
> Thanks. I asked my friend to see. He gave me the suggestion. The
> RegEnumValue can recognize the com and USB->COM. The problem solved now, I
> got the correct result: COM1(com), COM7(usb->com). In front of
> RegEnumValue, add:
> dwName = sizeof(Name);
> dwSizeofPortName = sizeof(szPortName);
> So the whole code is as follows (a bug in it: didn't release memalloc, but
> doesn't influence the result here).
>
> #include <windows.h>
> #include <stdio.h>
> #include <tchar.h>
>
> int main(void)
> {
> int z;
> char *strSerialList[256];
> for (z=0; z<=256; z++)
> {
> strSerialList[z] = (char*)malloc(4096*sizeof(char));
> }
> HKEY hKey;
>
> if( RegOpenKeyEx(HKEY_LOCAL_MACHINE,
> TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
> 0,
> KEY_READ,
> &hKey) != ERROR_SUCCESS)
> {
> return -1;
> }
>
> int i=0;
> CHAR Name[4096];
> UCHAR szPortName[4096];
> LONG Status;
> DWORD dwIndex = 0;
> DWORD dwName;
> DWORD dwSizeofPortName;
> DWORD Type;
> dwName = sizeof(Name);
> dwSizeofPortName = sizeof(szPortName);
>
> do
> {
> dwName = sizeof(Name);
> dwSizeofPortName = sizeof(szPortName);
> Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, &Type,
> szPortName, &dwSizeofPortName);
> printf("Name=%s,szPortName=%s \n", Name, szPortName);
> if((Status == ERROR_SUCCESS) )
> {
> strcpy(strSerialList[i],(char*)szPortName);
> //strSerialList[i] = (char*) szPortName;
> printf("%s ",strSerialList[i]);
> printf("i=%d,dwIndex=%d\n",i,dwIndex);
> i++;
> }
> } while((Status == ERROR_SUCCESS) );
> RegCloseKey(hKey);
>
> printf("\n\n");
> for(int j=0;j<i;j++)
> {
> printf("%s\n",strSerialList[j]);
> }
>
> return 0;
> }
>
>
>
> On Dec 19, 2007 6:02 PM, Per Westermark <pw...@ia...> wrote:
>
> > On an old test machine I have, the original code produces:
> > COM1
> > COM1
> > COM1
> > COM1
> > COM1
> > COM1
> >
> > After adding strdup(), I get:
> > COM5
> > COM6
> > COM7
> > COM7
> > COM4
> > COM1
> >
> > Are you sure that your change was correct, and that you remembered to
> > recompile?
> >
> > One interesting thing here is that COM7 is printed twice, while my much
> > used COM3 is not enumerated.
> >
> > The two COM7 seems to be a stupid M$ bug with an USB serial adapter :(
> >
> > /pwm
> >
> > On Wed, 19 Dec 2007, Jessica Chen wrote:
> >
> > > 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
> > > > >
> > i> > > 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
> > > > >
> > > >
> > > >
> > >
> >
> >
>
|
|
From: Jessica C. <jes...@gm...> - 2007-12-20 15:02:39
|
yep.. i will change 4096*256=1M part. that is too big for saving serial
port info.
the function of strdup is equal to strlen() + malloc() + memcpy()?
so, i don't need to do memalloc for strSerialList as what i did, since
strdup() will do?
is this a correct understanding?
On Dec 20, 2007 9:23 AM, Per Westermark <pw...@ia...> wrote:
> Now, you are preallocating 4096 bytes for 256 serial ports. That is 1MB of
> memory. That is not something you want in production code.
>
> My change with strdup() would have performed a strlen() + an optimum-sized
> malloc() + memcpy() for any detected serial ports, i.e. it will end up
> needing at the most a couple of hundred bytes of memory for the names.
>
> /pwm
>
> On Thu, 20 Dec 2007, Jessica Chen wrote:
>
> > Hi, Per,
> >
> > Thanks. I asked my friend to see. He gave me the suggestion. The
> > RegEnumValue can recognize the com and USB->COM. The problem solved
> now, I
> > got the correct result: COM1(com), COM7(usb->com). In front of
> > RegEnumValue, add:
> > dwName = sizeof(Name);
> > dwSizeofPortName = sizeof(szPortName);
> > So the whole code is as follows (a bug in it: didn't release memalloc,
> but
> > doesn't influence the result here).
> >
> > #include <windows.h>
> > #include <stdio.h>
> > #include <tchar.h>
> >
> > int main(void)
> > {
> > int z;
> > char *strSerialList[256];
> > for (z=0; z<=256; z++)
> > {
> > strSerialList[z] = (char*)malloc(4096*sizeof(char));
> > }
> > HKEY hKey;
> >
> > if( RegOpenKeyEx(HKEY_LOCAL_MACHINE,
> > TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
> > 0,
> > KEY_READ,
> > &hKey) != ERROR_SUCCESS)
> > {
> > return -1;
> > }
> >
> > int i=0;
> > CHAR Name[4096];
> > UCHAR szPortName[4096];
> > LONG Status;
> > DWORD dwIndex = 0;
> > DWORD dwName;
> > DWORD dwSizeofPortName;
> > DWORD Type;
> > dwName = sizeof(Name);
> > dwSizeofPortName = sizeof(szPortName);
> >
> > do
> > {
> > dwName = sizeof(Name);
> > dwSizeofPortName = sizeof(szPortName);
> > Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL,
> &Type,
> > szPortName, &dwSizeofPortName);
> > printf("Name=%s,szPortName=%s \n", Name, szPortName);
> > if((Status == ERROR_SUCCESS) )
> > {
> > strcpy(strSerialList[i],(char*)szPortName);
> > //strSerialList[i] = (char*) szPortName;
> > printf("%s ",strSerialList[i]);
> > printf("i=%d,dwIndex=%d\n",i,dwIndex);
> > i++;
> > }
> > } while((Status == ERROR_SUCCESS) );
> > RegCloseKey(hKey);
> >
> > printf("\n\n");
> > for(int j=0;j<i;j++)
> > {
> > printf("%s\n",strSerialList[j]);
> > }
> >
> > return 0;
> > }
> >
> >
> >
> > On Dec 19, 2007 6:02 PM, Per Westermark <pw...@ia...> wrote:
> >
> > > On an old test machine I have, the original code produces:
> > > COM1
> > > COM1
> > > COM1
> > > COM1
> > > COM1
> > > COM1
> > >
> > > After adding strdup(), I get:
> > > COM5
> > > COM6
> > > COM7
> > > COM7
> > > COM4
> > > COM1
> > >
> > > Are you sure that your change was correct, and that you remembered to
> > > recompile?
> > >
> > > One interesting thing here is that COM7 is printed twice, while my
> much
> > > used COM3 is not enumerated.
> > >
> > > The two COM7 seems to be a stupid M$ bug with an USB serial adapter :(
> > >
> > > /pwm
> > >
> > > On Wed, 19 Dec 2007, Jessica Chen wrote:
> > >
> > > > 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
> > > > > >
> > > i> > > 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
> > > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> >
>
>
|
|
From: Per W. <pw...@ia...> - 2007-12-20 15:19:11
|
Yes, strdup() is a nice function to know. If doing the allocation on
program startup, you can normally ignore to release the memory. If doing
it in a loop or not needing the results when your function ends, then you
should do free() on all pointers returned from strdup().
Try to google for "man strdup".
/pwm
On Thu, 20 Dec 2007, Jessica Chen wrote:
> yep.. i will change 4096*256=1M part. that is too big for saving serial
> port info.
>
> the function of strdup is equal to strlen() + malloc() + memcpy()?
> so, i don't need to do memalloc for strSerialList as what i did, since
> strdup() will do?
> is this a correct understanding?
>
>
>
> On Dec 20, 2007 9:23 AM, Per Westermark <pw...@ia...> wrote:
>
> > Now, you are preallocating 4096 bytes for 256 serial ports. That is 1MB of
> > memory. That is not something you want in production code.
> >
> > My change with strdup() would have performed a strlen() + an optimum-sized
> > malloc() + memcpy() for any detected serial ports, i.e. it will end up
> > needing at the most a couple of hundred bytes of memory for the names.
> >
> > /pwm
> >
> > On Thu, 20 Dec 2007, Jessica Chen wrote:
> >
> > > Hi, Per,
> > >
> > > Thanks. I asked my friend to see. He gave me the suggestion. The
> > > RegEnumValue can recognize the com and USB->COM. The problem solved
> > now, I
> > > got the correct result: COM1(com), COM7(usb->com). In front of
> > > RegEnumValue, add:
> > > dwName = sizeof(Name);
> > > dwSizeofPortName = sizeof(szPortName);
> > > So the whole code is as follows (a bug in it: didn't release memalloc,
> > but
> > > doesn't influence the result here).
> > >
> > > #include <windows.h>
> > > #include <stdio.h>
> > > #include <tchar.h>
> > >
> > > int main(void)
> > > {
> > > int z;
> > > char *strSerialList[256];
> > > for (z=0; z<=256; z++)
> > > {
> > > strSerialList[z] = (char*)malloc(4096*sizeof(char));
> > > }
> > > HKEY hKey;
> > >
> > > if( RegOpenKeyEx(HKEY_LOCAL_MACHINE,
> > > TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
> > > 0,
> > > KEY_READ,
> > > &hKey) != ERROR_SUCCESS)
> > > {
> > > return -1;
> > > }
> > >
> > > int i=0;
> > > CHAR Name[4096];
> > > UCHAR szPortName[4096];
> > > LONG Status;
> > > DWORD dwIndex = 0;
> > > DWORD dwName;
> > > DWORD dwSizeofPortName;
> > > DWORD Type;
> > > dwName = sizeof(Name);
> > > dwSizeofPortName = sizeof(szPortName);
> > >
> > > do
> > > {
> > > dwName = sizeof(Name);
> > > dwSizeofPortName = sizeof(szPortName);
> > > Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL,
> > &Type,
> > > szPortName, &dwSizeofPortName);
> > > printf("Name=%s,szPortName=%s \n", Name, szPortName);
> > > if((Status == ERROR_SUCCESS) )
> > > {
> > > strcpy(strSerialList[i],(char*)szPortName);
> > > //strSerialList[i] = (char*) szPortName;
> > > printf("%s ",strSerialList[i]);
> > > printf("i=%d,dwIndex=%d\n",i,dwIndex);
> > > i++;
> > > }
> > > } while((Status == ERROR_SUCCESS) );
> > > RegCloseKey(hKey);
> > >
> > > printf("\n\n");
> > > for(int j=0;j<i;j++)
> > > {
> > > printf("%s\n",strSerialList[j]);
> > > }
> > >
> > > return 0;
> > > }
> > >
> > >
> > >
> > > On Dec 19, 2007 6:02 PM, Per Westermark <pw...@ia...> wrote:
> > >
> > > > On an old test machine I have, the original code produces:
> > > > COM1
> > > > COM1
> > > > COM1
> > > > COM1
> > > > COM1
> > > > COM1
> > > >
> > > > After adding strdup(), I get:
> > > > COM5
> > > > COM6
> > > > COM7
> > > > COM7
> > > > COM4
> > > > COM1
> > > >
> > > > Are you sure that your change was correct, and that you remembered to
> > > > recompile?
> > > >
> > > > One interesting thing here is that COM7 is printed twice, while my
> > much
> > > > used COM3 is not enumerated.
> > > >
> > > > The two COM7 seems to be a stupid M$ bug with an USB serial adapter :(
> > > >
> > > > /pwm
> > > >
> > > > On Wed, 19 Dec 2007, Jessica Chen wrote:
> > > >
> > > > > 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
> > > > > > >
> > > > i> > > 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
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > >
> >
> >
>
|
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