USB HID設備只報告第一個事件

Question

我有一個eDIO USB多遙控器（一個紅外接收器）隨附華碩PSR 2000網絡衝浪遠程控制。

我試圖將遠程控制器連接到我的pi，以便它能夠接收遠程發送的擊鍵。

控制器被檢測爲HID設備。下面是從-v的lsusb命令

Bus 001 Device 007: ID 147a:e001 Formosa Industrial Computing, Inc. 
Couldn't open device, some information will be missing 
Device Descriptor: 
bLength    18 
bDescriptorType   1 
bcdUSB    1.10 
bDeviceClass   0 (Defined at Interface level) 
bDeviceSubClass   0 
bDeviceProtocol   0 
bMaxPacketSize0   8 
idVendor   0x147a Formosa Industrial Computing, Inc. 
idProduct   0xe001 
bcdDevice   1.22 
iManufacturer   1 
iProduct    2 
iSerial     0 
bNumConfigurations  1 
Configuration Descriptor: 
bLength     9 
bDescriptorType   2 
wTotalLength   34 
bNumInterfaces   1 
bConfigurationValue  1 
iConfiguration   4 
bmAttributes   0xa0 
(Bus Powered) 
Remote Wakeup 
MaxPower    300mA 
Interface Descriptor: 
bLength     9 
bDescriptorType   4 
bInterfaceNumber  0 
bAlternateSetting  0 
bNumEndpoints   1 
bInterfaceClass   3 Human Interface Device 
bInterfaceSubClass  1 Boot Interface Subclass 
bInterfaceProtocol  2 Mouse 
iInterface    0 
HID Device Descriptor: 
bLength     9 
bDescriptorType  33 
bcdHID    1.10 
bCountryCode   0 Not supported 
bNumDescriptors   1 
bDescriptorType  34 Report 
wDescriptorLength  20 
Report Descriptors: 
** UNAVAILABLE ** 
Endpoint Descriptor: 
bLength     7 
bDescriptorType   5 
bEndpointAddress  0x81 EP 1 IN 
bmAttributes   3 
    Transfer Type   Interrupt 
    Synch Type    None 
    Usage Type    Data 
wMaxPacketSize  0x0004 1x 4 bytes 
bInterval    10 

我還可以在與事件dev的文件夾中的設備創建的細節

pi@raspberrypi /dev/input/by-id $ dir 
usb-Cypress_Semiconductor_eDio_USB_Multi_Remote_Controlle-event-if00 

與它相關聯的事件處理程序是從被視爲如下以下命令。

pi@raspberrypi /proc/bus/input $ cat devices 
    I: Bus=0003 Vendor=147a Product=e001 Version=0110 
    N: Name="Cypress Semiconductor eDio USB Multi Remote Controlle" 
    P: Phys=usb-bcm2708_usb-1.2/input0 
    S: Sysfs=/devices/platform/bcm2708_usb/usb1/1-1/1-1.2/1-1.2:1.0/input/input2 
    U: Uniq= 
    H: Handlers=event0 
    B: PROP=0 
    B: EV=1 

問題是，當我試圖讀取該device.The第一次擊鍵已註冊，但隨後的擊鍵創建事件處理程序的輸出不是由CAT命令顯示。

pi@raspberrypi /dev/input $ cat event0 | xxd 
    0000000: e007 9450 9476 0900 0000 0000 0000 0000 ...P.v.......... 

請問我該怎麼做才能使設備正常工作。除非重新插入設備，否則在第一次擊鍵後按任意鍵不會返回任何內容。

請提出解決問題需要做些什麼。

Answer 1

根據您最終想要做什麼，將HID遙控器的按鈕映射到擊鍵可能就足夠了，並且使用諸如QJoyPad之類的工具很容易實現。

似乎hard to build on a Raspberry Pi，所以你可能想嘗試joy2key，而不是在回購：sudo apt-get install joy2key。

Answer 2

最後，我有時間使用PyusB庫編寫我自己的實現，它是Libusb的包裝。

我在這裏發佈的代碼。可能有人幫助。

我有另一段代碼來創建這裏使用的配置文件。由於我不需要所有的遠程密鑰，所以沒有映射所有的遠程密鑰。

import usb.core 
import usb.util 
import ConfigParser 
import shlex 
import subprocess 
import logging 

# find our device 
diction={ 
    6402315641282315:'1', 
    6402415641282415:'2', 
    6402515641282515:'3', 
    6402615641282615:'4', 
    6402715641282715:'5', 
    6402815641282815:'6', 
    6402915641282915:'7', 
    6403015641283015:'8', 
    6403115641283115:'9', 
    } 



def load_config(): 
    dict={} 
    config = ConfigParser.RawConfigParser() 
    config.read('/codes/remote/remote.cfg') 

    dict['vendor']=config.getint('Settings','idVendor') 

    dict['product']=config.getint('Settings','idProduct') 

    dict['interface']=config.getint('Settings', 'interface') 

    r=config.options('Key Mappings') 

    for item in r: 
     if config.get('Key Mappings',item)!='': 
      dict[item]=config.get('Key Mappings',item) 
      #print config.get('Key Mappings',item) 
    return dict 

def pyus(): 

    try: 
     load_log() 
     dict=load_config() 
     join_int = lambda nums: int(''.join(str(i) for i in nums)) 
     #print dict 

     dev = usb.core.find(idVendor=dict['vendor'], idProduct=dict['product']) 
     interface=dict['interface'] 

     if dev is None: 
      raise ValueError('Device not found') 

     if dev.is_kernel_driver_active(interface) is True: 
       #print "but we need to detach kernel driver" 
       dev.detach_kernel_driver(interface) 
     #dev.detatch_kernel_driver(interface) 
     # set the active configuration. With no arguments, the first 
     # configuration will be the active one 
     dev.set_configuration() 

     # get an endpoint instance 
     cfg = dev.get_active_configuration() 
     interface_number = cfg[(0,0)].bInterfaceNumber 
     alternate_setting = usb.control.get_interface(dev,interface_number) 
     intf = usb.util.find_descriptor(
      cfg, bInterfaceNumber = interface_number, 
      bAlternateSetting = alternate_setting 
     ) 

     ep = usb.util.find_descriptor(
      intf, 
      # match the first IN endpoint 
      custom_match = \ 
      lambda e: \ 
       usb.util.endpoint_direction(e.bEndpointAddress) == \ 
       usb.util.ENDPOINT_IN 
     ) 

     assert ep is not None 
     #print 'packet details',ep.bEndpointAddress , ep.wMaxPacketSize 

     while 1: 
      try: 
       data = dev.read(ep.bEndpointAddress, ep.wMaxPacketSize*2,interface,1000) 
       data=data.tolist() 
       key=join_int(data) 
       #print "Key is " , key 
       if key in diction: 

        try: 
         args=shlex.split(dict[diction[key]]) 
         #print args 
         p=subprocess.Popen(args, stderr=subprocess.STDOUT, stdout=subprocess.PIPE) 
         #print "Pressed key is ",diction[key] 
        except: 
         pass 


      except usb.core.USBError as e: 
       pass 
    except: 
     pass 

pyus() 






#____________________________REPORT DESCRIPTOR EXAMPLE___________________ 
# Bus 001 Device 007: ID 147a:e001 Formosa Industrial Computing, Inc. 
    # Couldn't open device, some information will be missing 
    # Device Descriptor: 
    # bLength    18 
    # bDescriptorType   1 
    # bcdUSB    1.10 
    # bDeviceClass   0 (Defined at Interface level) 
    # bDeviceSubClass   0 
    # bDeviceProtocol   0 
    # bMaxPacketSize0   8 
    # idVendor   0x147a Formosa Industrial Computing, Inc. 
    # idProduct   0xe001 
    # bcdDevice   1.22 
    # iManufacturer   1 
    # iProduct    2 
    # iSerial     0 
    # bNumConfigurations  1 
    # Configuration Descriptor: 
    # bLength     9 
    # bDescriptorType   2 
# wTotalLength   34 
# bNumInterfaces   1 
# bConfigurationValue  1 
# iConfiguration   4 
# bmAttributes   0xa0 
    # (Bus Powered) 
    # Remote Wakeup 
# MaxPower    300mA 
# Interface Descriptor: 
    # bLength     9 
    # bDescriptorType   4 
    # bInterfaceNumber  0 
    # bAlternateSetting  0 
    # bNumEndpoints   1 
    # bInterfaceClass   3 Human Interface Device 
    # bInterfaceSubClass  1 Boot Interface Subclass 
    # bInterfaceProtocol  2 Mouse 
    # iInterface    0 
    # HID Device Descriptor: 
     # bLength     9 
     # bDescriptorType  33 
     # bcdHID    1.10 
     # bCountryCode   0 Not supported 
     # bNumDescriptors   1 
     # bDescriptorType  34 Report 
     # wDescriptorLength  20 
    # Report Descriptors: 
     # ** UNAVAILABLE ** 
    # Endpoint Descriptor: 
    # bLength     7 
    # bDescriptorType   5 
    # bEndpointAddress  0x81 EP 1 IN 
    # bmAttributes   3 
     # Transfer Type   Interrupt 
     # Synch Type    None 
     # Usage Type    Data 
    # wMaxPacketSize  0x0004 1x 4 bytes 
    # bInterval    10