| 标题 | 阅读 | 评论 | 转发 | 发布日期 | |
|---|---|---|---|---|---|
| Multimedia Functions | 1275 | 0 | 0 | 2013-05-29 | |
| number 5 | 499 | 0 | 0 | 2013-05-16 | |
| number 4 | 291 | 0 | 0 | 2013-05-16 | |
| number 3 | 482 | 0 | 0 | 2013-05-16 | |
| number 2 | 365 | 0 | 0 | 2013-05-16 | |
| number 1 | 406 | 0 | 0 | 2013-05-16 | |
| 打包程序 | 633 | 0 | 0 | 2013-01-19 | |
| C/C++格式化字符串说明 | 6830 | 0 | 0 | 2013-01-15 | |
| 【推荐】 VC解决内存泄露的几个方法 | 1377 | 1 | 0 | 2012-10-30 | |
| 黄山游记 | 535 | 0 | 0 | 2012-10-17 | |
| 轶事两则 | 545 | 0 | 0 | 2012-09-04 | |
| 嵌入式调试和烧写 | 1065 | 0 | 0 | 2012-08-26 | |
| 南京，许多事 | 557 | 0 | 0 | 2012-07-24 | |
| 笑话与幽默 | 854 | 0 | 0 | 2012-07-08 | |
| qtopia-free-src-2.2.0 的编译过程 | 1595 | 2 | 0 | 2012-05-13 | |
| 【推荐】 linux下面库路径 | 5871 | 0 | 0 | 2012-05-13 | |
| 重装系统之旅 | 641 | 0 | 0 | 2012-05-05 | |
| How to Hack PE | 1114 | 0 | 0 | 2012-04-11 | |
| （转帖）Ascii码表（全） | 912 | 0 | 1 | 2012-04-11 | |
| （转帖）C++ 对象的内存布局----主要看virtual 继承的解释 | 3633 | 1 | 1 | 2012-03-22 |
chinaunix网友2006-06-14 20:44
我的开发板上的USB只能部分识别,高手能帮忙解决吗? 正确的打印信息如下: (前面有"!!!"的是我另外加上的打印信息,主要是在core/hub.c中的函数中) # !!! state 5 ports 4 chg 0000 evt 0010 !!! connect_change =0 !!! connect_change =0 !!! connect_change =0 !!! connect_change =0 !!! (1) hub_port_reset(hub, port1, udev, delay)=-134 !!! in hub_event, list_empty(&hub_event_list)!=0 !!! state 5 ports 2 chg 0000 evt 0004 !!! connect_change =0 !!! connect_change =0 !!! (1) hub_port_reset(hub, port1, udev, delay)=0 usb 3-2: new full speed USB device using ohci_hcd and address 2 !!! (2)hub_port_reset(hub, port1, udev, delay)=0 usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE)=18 udev->descriptor.bMaxPacketSize0=8 udev->descriptor.bLength=12 udev->descriptor.bDescriptorType=1 udev->descriptor.bcdUSB=110 udev->descriptor.bDeviceClass=0 udev->descriptor.bDeviceSubClass=0 udev->descriptor.idVendor=dd8 udev->descriptor.idProduct=1003 udev->descriptor.bcdDevice=200 udev->descriptor.iManufacturer=1 udev->descriptor.iProduct=2 udev->descriptor.iSerialNumber=0 udev->descriptor.bNumConfigurations=1 !!! new device strings: Mfr=1, Product=2, SerialNumber=0 !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_probe_interface scsi2 : SCSI emulation for USB Mass Storage devices !!! hub_port_connect_change return !!! state 5 ports 2 chg 0000 evt 0004 !!! connect_change =0 !!! connect_change =0 !!! in hub_event, list_empty(&hub_event_list)!=0 !!! in hub_thread() ,after hub_event,begin wait_event_interruptible ! Vendor: Model: Rev: Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 62048 512-byte hdwr sectors (32 MB) sda: assuming drive cache: write through SCSI device sda: 62048 512-byte hdwr sectors (32 MB) sda: assuming drive cache: write through sda: sda1 Attached scsi disk sda at scsi2, channel 0, id 0, lun 0 Attached scsi generic sg0 at scsi2, channel 0, id 0, lun 0, type 0 不能识别的USB 的打印信息如下: # !!! state 5 ports 4 chg 0000 evt 0010 !!! connect_change =0 !!! connect_change =0 !!! connect_change =0 !!! connect_change =0 !!! (1) hub_port_reset(hub, port1, udev, delay)=-134 !!! in hub_event, list_empty(&hub_event_list)!=0 !!! state 5 ports 2 chg 0000 evt 0004 !!! connect_change =0 !!! connect_change =0 !!! (1) hub_port_reset(hub, port1, udev, delay)=0 usb 3-2: new full speed USB device using ohci_hcd and address 3 !!! (2)hub_port_reset(hub, port1, udev, delay)=0 usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE)=18 udev->descriptor.bMaxPacketSize0=64 udev->descriptor.bLength=12 udev->descriptor.bDescriptorType=1 udev->descriptor.bcdUSB=110 udev->descriptor.bDeviceClass=0 udev->descriptor.bDeviceSubClass=0 udev->descriptor.idVendor=204 udev->descriptor.idProduct=6025 udev->descriptor.bcdDevice=100 udev->descriptor.iManufacturer=0 udev->descriptor.iProduct=0 udev->descriptor.iSerialNumber=0 udev->descriptor.bNumConfigurations=1 !!! new device strings: Mfr=0, Product=0, SerialNumber=0 !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_device_match() !!! begin to usb_probe_interface scsi3 : SCSI emulation for USB Mass Storage devices !!! hub_port_connect_change return !!! state 5 ports 2 chg 0000 evt 0004 !!! connect_change =0 !!! connect_change =0 !!! in hub_event, list_empty(&hub_event_list)!=0 !!! in hub_thread() ,after hub_event,begin wait_event_interruptible ! /******************这里要等待一段时间************************/ !!! (1) hub_port_reset(hub, port1, udev, delay)=0 usb 3-2: reset full speed USB device using ohci_hcd and address 3 usb 3-2: scsi_eh_3 timed out on ep0in !!! (2)hub_port_reset(hub, port1, udev, delay)=0 usb 3-2: device descriptor read/64, error -145 usb 3-2: scsi_eh_3 timed out on ep0in !!! (2)hub_port_reset(hub, port1, udev, delay)=0 usb 3-2: device descriptor read/64, error -145 !!! state 5 ports 2 chg 0000 evt 0004 !!! connect_change =0 !!! connect_change =0 !!! in hub_event, list_empty(&hub_event_list)!=0 .........................以下省略 初看好象前面都是一样的,直到执行函数wait_event_interruptible(khubd_wait, !list_empty(&hub_event_list))的时候,出现问题,但我不知道为什么会出现这样的问题.有高手知道吗?? 下面是/usb/core/hub.c中的线程函数: static int hub_thread(void *__unused) { /* * This thread doesn't need any user-level access, * so get rid of all our resources */ daemonize("khubd"); allow_signal(SIGKILL); /* Send me a signal to get me die (for debugging) */ do { hub_events(); wait_event_interruptible(khubd_wait, !list_empty(&hub_event_list)); try_to_freeze(PF_FREEZE); } while (!signal_pending(current)); pr_debug ("%s: khubd exiting\n", usbcore_name); complete_and_exit(&khubd_exited, 0); } 我都快分析了一周了,没解决! 求高手,帮忙分析一下!
