Alan Stern <stern@...> writes: > > Questions like this should always be posted to the linux-usb mailing > list. > > On Thu, 27 Dec 2012, Dan Clapp wrote: > > > Hello Alan, > > > > First, let me start by thanking you for supplying you code. I > > appreciate it. I think this is the way we would like to go to test our > > system before we actually get hardware made. > > > > I am getting desperate! I have been trying to use your "dummy_hcd.ko" > > and g_zero.ko module to try and run usb test and eventually get to write > > my own usb device driver. > > > > However, I keep freezing up my system when I install the g_zero device > > driver. > > > > I was wondering if can either point me in the correct direction, and or > > give me a couple of hints as to what i am doing wrong: > > > > Here is what I am doing: > > > > Running on Fedora 14 virtual machine. > > Fedora 14 is about two years old now, and it isn't supported any more > (no more software updates, bug fixes, or security fixes). Shouldn't > you use something more up-to-date? > As you suggested, to make things more up to date, I have switched to Fedora 17, kernel 3.6.10-2. I have now successfully loaded the kernel modules udc-core dummy_hcd g_zero I am using libusb to read and try and do a IN/OUT transfer from the host side. I am successfully reading the enumeration, and can see the endpoint configuration for the g_zero driver. But I am getting errors when I try and do a bulk endpoint write and/or read. In troubleshooting, I noticed the following error code output when I load the gadget g_zero module (output from dmesg): [5104.4532] dummy_udc dummy_udc: enabled ep-a (ep1in-bulk) maxpacket 512 stream disabled [5104.4532] dummy_udc dummy_udc: enabled ep-b (ep2out-builk) maxpacket 512 stream disabled [5104.4532] gadget: source/sink enabled, alt intf 0 [5104.4824] dummy_dc dummy_udc: setup--> -22 Is this error -22 an issue, and if so, what could cause it? I can read the enumeration with libusb calls: Number of possible configurations: 2 Device Class: 255 VendorID: 1317 ProductID: 42144 Interfaces: 1 ||| Number of alternate settings: 2 | Interface Number: 0 | Number of endpoints: 2 | Descriptor Type: 5 | EP Address: 129 | Descriptor Type: 5 | EP Address: 2 | Interface Number: 0 | Number of endpoints: 4 | Descriptor Type: 5 | EP Address: 129 | Descriptor Type: 5 | EP Address: 2 | Descriptor Type: 5 | EP Address: 131 | Descriptor Type: 5 | EP Address: 4 | When I write to EP 2 I get an error is dmesg [ 9421.189601] gadget: bad OUT byte, buf[0] = 97 where I am sending four bytes "abcd", so I am getting an error on the first byte. thanks for any help. Dan > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@... > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- 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
