Opening a specific USB device.

Hello PPl,

some time ago i've seen a cool way to open a serial port.

handle = CreateFile ("COM1" ....) ;

Is there a similar way to open a specifc USB driver / device.

handle = CreateFile ("USB1" ...);
doesn't work.

Any suggestions ? :-)

Regards,
Robert

As far as I know USB doesnt support this....

There will probably be another option....what are you trying to do?

I'm trying to open a driver for a specific device that
are driven by usbio.sys driver form thesycon.

Currently i'm about to enumerate all devices over the ports,
begining like that:

Code:

---

FOR ..
      wsprintf(HCName, "\\\\.\\HCD%d", HCNum);
        hHCDev = CreateFile(HCName,
                            GENERIC_WRITE,
                            FILE_SHARE_WRITE,
                            NULL,
                            OPEN_EXISTING,
                            0,
                            NULL);

      if HCDDev != INVALID_HANDLE_VALUE

                        OpenRootHub etc.

---

Sorry for that ugly pseudo code but, that is how im making it.

Here is an output what my code produces.

Host Controller Device 0: HCD0
HCD Driver Name Length: 24
HCD Driver Name: USB\0000
RootHub Name length: 116
RootHub Name: 0000000000000002#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
Opening RootHub: \\.\0000000000000002#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
Anzahl der Geräte am HUB: 3
ROOT:
Dev: 1 >Device Connected
Dev: 2 >No device
Dev: 3 >No device

Host Controller Device 1: HCD1
HCD Driver Name Length: 24
HCD Driver Name: USB\0001
RootHub Name length: 116
RootHub Name: 0000000000000003#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
Opening RootHub: \\.\0000000000000003#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
Anzahl der Geräte am HUB: 3
ROOT:
Dev: 1 >Device Connected
Dev: 2 >No device
Dev: 3 >No device
>



I just want to skip this part and open a driver directly.
Not scanning over all connected devices to the HCD.

Hope it's not too confusing.

For USB communication you could try the free USB driver from Thesycon, note that its the lite-version, but its a nice thing to use when learning USB.

www.thesycon.de/usbio/eng/usbio.htm

Shiro

thanks, i'm using the Thesycon driver, but when i want
to open the driver by static name, as decribed:
#define DEVICE_NAME "blblb" withn the source there,
i cannt obtain a handle.


Thanks to all for help!