Question

我正在尝试从操纵杆中读取按钮和其他信息。我的代码给我一个“错误13：访问被拒绝”

Traceback (most recent call last):
  File "./JOYSTICK.py", line 17, in <module>
    ep.wMaxPacketSize)
  File "/usr/local/lib/python3.6/site-packages/usb/core.py", line 975, in read
    intf, ep = self._ctx.setup_request(self, endpoint)
  File "/usr/local/lib/python3.6/site-packages/usb/core.py", line 102, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/usb/core.py", line 216, in setup_request
    self.managed_claim_interface(device, intf)
  File "/usr/local/lib/python3.6/site-packages/usb/core.py", line 102, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/usb/core.py", line 167, in managed_claim_interface
    self.backend.claim_interface(self.handle, i)
  File "/usr/local/lib/python3.6/site-packages/usb/backend/libusb1.py", line 811, in claim_interface
    _check(self.lib.libusb_claim_interface(dev_handle.handle, intf))
  File "/usr/local/lib/python3.6/site-packages/usb/backend/libusb1.py", line 595, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 13] Access denied (insufficient permissions)

我尝试使用sudo python3 JOYSTICK.py（具有正确的shebang）以sudo模式启动它，但是它不起作用。我也尝试过以sudo激活我的虚拟环境，但是从根目录启动时，它无法识别source命令。

#!/usr/bin/env python3

import usb.core

dev = usb.core.find(idVendor=0x044f, idProduct=0xb108)

dev.set_configuration(1) # from print usb.core.find()
cfg = dev.get_active_configuration()
intf = cfg[(0,0)]

ep = intf[0]
print(ep)

while (True):
  data = dev.read(ep.bEndpointAddress,
                  ep.wMaxPacketSize)
  print(data)

我希望我的代码在按下操纵杆上的按钮或更改轴时显示换行符。

谢谢。

通过读取USB端口拒绝访问

0 个答案: