用pyusb模块 dev.get_active_configuration()错误

pll19840511 · 发表于 2016-2-19 10:13:18

源代码为：
import usb.core
import usb.util
import sys
dev =  usb.core.find(idVendor= 0x0781, idProduct= 0x5567)
if dev is None:
raise ValueError('Device not found')
print(dev)
# set the active configuration. With no arguments, the first
# configuration will be the active one

cfg = dev.get_active_configuration()

结果为：
<usb.core.Device object at 0x01155AD0>
Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\桌面\新建文件夹 (3)\123.py", line 11, in <module>
cfg = dev.get_active_configuration()
  File "C:\Python33\lib\site-packages\usb\core.py", line 558, in get_active_configuration
return self._ctx.get_active_configuration(self)
  File "C:\Python33\lib\site-packages\usb\core.py", line 163, in get_active_configuration
self.managed_open()
  File "C:\Python33\lib\site-packages\usb\core.py", line 70, in managed_open
self.handle = self.backend.open_device(self.dev)
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 494, in open_device
_check(_lib.libusb_open(dev.devid, byref(handle)))
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 403, in _check
raise USBError(_str_error[ret], ret, _libusb_errno[ret])
usb.core.USBError: [Errno 40] Operation not supported or unimplemented on this platform
>>>
请问是什么问题？

Jach · 发表于 2016-2-19 14:01:55

沒看到你做dev.set_configuration()

pll19840511 · 发表于 2016-2-19 14:45:45

Jach 发表于 2016-2-19 14:01
沒看到你做dev.set_configuration()

dev.set_configuration()加之后还是同样的错误
import usb.core
import usb.util
import sys

dev =  usb.core.find(idVendor= 0x0781, idProduct= 0x5567)
if dev is None:
raise ValueError('Device not found')
print(dev)
# 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()
intf = cfg[(0,0)]

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

assert ep is not None

# write the data
ep.write('test')

<usb.core.Device object at 0x01142AF0>
Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\桌面\新建文件夹 (3)\123.py", line 12, in <module>
dev.set_configuration()
  File "C:\Python33\lib\site-packages\usb\core.py", line 554, in set_configuration
self._ctx.managed_set_configuration(self, configuration)
  File "C:\Python33\lib\site-packages\usb\core.py", line 91, in managed_set_configuration
self.managed_open()
  File "C:\Python33\lib\site-packages\usb\core.py", line 70, in managed_open
self.handle = self.backend.open_device(self.dev)
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 494, in open_device
_check(_lib.libusb_open(dev.devid, byref(handle)))
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 403, in _check
raise USBError(_str_error[ret], ret, _libusb_errno[ret])
usb.core.USBError: [Errno 40] Operation not supported or unimplemented on this platform

Excellence · 发表于 2016-2-19 15:41:46

楼主是PYTHON3,看看第三方的是否支持？
有的是支持2.7，里面数据ASCII,不是UTF-8

Jach · 发表于 2016-2-19 16:20:21

你用的pyusb是哪個版本? 怎麼core.py裏的那些line number位置和我差的蠻多的.

pll19840511 · 发表于 2016-2-19 16:24:43

本帖最后由 pll19840511 于 2016-2-19 16:25 编辑

Jach 发表于 2016-2-19 16:20
你用的pyusb是哪個版本? 怎麼core.py裏的那些line number位置和我差的蠻多的.

用的1.0.0,python3.3,windowxp ,刚重装了最新的beta测试版本pyusb,发现好像设备信息都出来了，你用的什么版本，python版本，平台是linux还是windowsxp什么的？
DEVICE ID 0ac8:0345 on Bus 008 Address 001 =================
bLength             : 0x12 (18 bytes)
bDescriptorType       : 0x1 Device
bcdUSB                :  0x200 USB 2.0
bDeviceClass          : 0xef Miscellaneous
bDeviceSubClass       : 0x2
bDeviceProtocol       : 0x1
bMaxPacketSize0       : 0x40 (64 bytes)
idVendor             : 0x0ac8
idProduct             : 0x0345
bcdDevice             : 0x2032 Device 32.32
iManufacturer       : 0x1 Error Accessing String
iProduct             : 0x2 Error Accessing String
iSerialNumber       : 0x0
bNumConfigurations    : 0x1
  CONFIGURATION 1: 500 mA ==================================
bLength             : 0x9 (9 bytes)
bDescriptorType    : 0x2 Configuration
wTotalLength       :  0x1c5 (453 bytes)
bNumInterfaces    : 0x2
bConfigurationValue  : 0x1
iConfiguration    : 0x0
bmAttributes       : 0x80 Bus Powered
bMaxPower          : 0xfa (500 mA)
INTERFACE 0: Video =====================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x0
   bAlternateSetting  : 0x0
   bNumEndpoints    : 0x1
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x1
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
   ENDPOINT 0x81: Interrupt IN ==========================
   bLength       : 0x7 (7 bytes)
   bDescriptorType  : 0x5 Endpoint
   bEndpointAddress : 0x81 IN
   bmAttributes    : 0x3 Interrupt
   wMaxPacketSize : 0x10 (16 bytes)
   bInterval       : 0x7
INTERFACE 1: Video =====================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x1
   bAlternateSetting  : 0x0
   bNumEndpoints    : 0x0
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x2
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
INTERFACE 1, 1: Video ==================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x1
   bAlternateSetting  : 0x1
   bNumEndpoints    : 0x1
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x2
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
   ENDPOINT 0x82: Isochronous IN ========================
   bLength       : 0x7 (7 bytes)
   bDescriptorType  : 0x5 Endpoint
   bEndpointAddress : 0x82 IN
   bmAttributes    : 0x5 Isochronous
   wMaxPacketSize : 0x1400 (5120 bytes)
   bInterval       : 0x1
INTERFACE 1, 2: Video ==================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x1
   bAlternateSetting  : 0x2
   bNumEndpoints    : 0x1
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x2
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
   ENDPOINT 0x82: Isochronous IN ========================
   bLength       : 0x7 (7 bytes)
   bDescriptorType  : 0x5 Endpoint
   bEndpointAddress : 0x82 IN
   bmAttributes    : 0x5 Isochronous
   wMaxPacketSize :  0xc00 (3072 bytes)
   bInterval       : 0x1
INTERFACE 1, 3: Video ==================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x1
   bAlternateSetting  : 0x3
   bNumEndpoints    : 0x1
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x2
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
   ENDPOINT 0x82: Isochronous IN ========================
   bLength       : 0x7 (7 bytes)
   bDescriptorType  : 0x5 Endpoint
   bEndpointAddress : 0x82 IN
   bmAttributes    : 0x5 Isochronous
   wMaxPacketSize :  0x400 (1024 bytes)
   bInterval       : 0x1
INTERFACE 1, 4: Video ==================================
   bLength          : 0x9 (9 bytes)
   bDescriptorType : 0x4 Interface
   bInterfaceNumber : 0x1
   bAlternateSetting  : 0x4
   bNumEndpoints    : 0x1
   bInterfaceClass : 0xe Video
   bInterfaceSubClass : 0x2
   bInterfaceProtocol : 0x0
   iInterface       : 0x4 Error Accessing String
   ENDPOINT 0x82: Isochronous IN ========================
   bLength       : 0x7 (7 bytes)
   bDescriptorType  : 0x5 Endpoint
   bEndpointAddress : 0x82 IN
   bmAttributes    : 0x5 Isochronous
   wMaxPacketSize :  0x200 (512 bytes)
   bInterval       : 0x1
Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\桌面\新建文件夹 (3)\123.py", line 13, in <module>
dev.set_configuration()
  File "C:\Python33\lib\site-packages\usb\core.py", line 799, in set_configuration
self._ctx.managed_set_configuration(self, configuration)
  File "C:\Python33\lib\site-packages\usb\core.py", line 128, in managed_set_configuration
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 730, in set_configuration
_check(self.lib.libusb_set_configuration(dev_handle.handle, config_value))
  File "C:\Python33\lib\site-packages\usb\backend\libusb1.py", line 552, in _check
raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 2] Entity not found

Jach · 发表于 2016-2-19 17:56:44

我(也)是1.0.0 (beta2), Python 3.4.3, Win7.

有進步了, 過了open()這一關.
但是, 怎麼印出來的裝置和你要的不合? 你的裝置是自己做的嗎?

502363916 · 发表于 2019-11-16 09:28:53

这个问题解决了么因为什么啊

用pyusb模块 dev.get_active_configuration()错误

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