Dnia sobota, 1 września 2012 o 17:38:39 Alan Stern napisał(a): > On Sat, 1 Sep 2012, Marek [iso-8859-2] Floria�czyk wrote: > > Hi everyone, > > > > I have two identical devices on usb (they are connected to bus 5 and bus > > 3 and they have different serial numbers of course). Devices are > > CKOZ-00/03 - Xcomfort gateway for controling house electric system. Both > > of them work fine when connected together and when I'm sending commands > > to them one by one. Problem appears when I send two commands (one after > > another in loop) to both devices, which in turn are sending data to > > remote actuator which in turn should reply with some data. In short > > words it looks like my computer is loosing one reply from remote device. > > ... > > > So my questions are: > > When I'm sniffing data like this, is it still possible that kernel, or > > module, or whatever is loosing data that I'm waiting for, and If so, how > > can I produce more detailed debug. > > It's possible that data is getting lost, but it's pretty unlikely. The > only way to get more detailed debugging information is to use a USB bus > analyzer. HI, You mean hardware device that is connected into the usb bus something like this: http://www.fte.com/products/FTS4USB.aspx Or do you mean some software that I can use on linux, if so could you please recommend any, all I can find is for windows :( > > (It also wouldn't hurt to upgrade to a more recent kernel. 2.6.32 is > getting kind of old.) > > > Or is it actually a proof that CKOZ devices connected to my computer are > > not getting data from remote actuator in the first place? > > You could do more testing. For example, run the same program but > comment out the parts that talk to the device on bus 3. Or plug the > devices into each other's ports, or swap the serial numbers in the > program. I can send commands separately to each device, and then there is no problem. Changing serial numbers won't work, application has class usb-manager that during start creates objects MyUsb and each object is given device id vendor id and serial number, to connect to CKOZ gateway. I have tested this using libusb (every MyUsb object in separate thread) and then hid-api (http://www.signal11.us/oss/hidapi/) but results are the same. Surely I can try upgrade kernel tommorow. regards Marek > > Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
