当我试图使用pyusb从usb设备读取数据时，我总是遇到“usb.core.USBError:[Errno 16]资源繁忙”

Question

我正在尝试使用Pyusb模块用Python与这个设备通信

该设备是一个DualSense Ps5控制器，我正在运行Rasbian Lite（无桌面环境）

到目前为止，我的代码是：

import usb.core

dev = usb.core.find(idVendor=0x054c,idProduct=0x0ce6)
ep = dev[0].interfaces()[5].endpoints()[0]

i = dev[0].interfaces()[5].bInterfaceNumber

dev.reset()

if dev.is_kernel_driver_active(i):
    dev.detach_kernel_driver(i)
    
dev.set_configuration()

eaddr = ep.bEndpointAdress

r = dev.read(eaddr,1024)
print(len(r))

我经常遇到的错误是：

Traceback (most recent call last):
  File "readUsb.py", line 25, in <module>
    dev.set_configuration()
  File "/usr/local/lib/python3.7/dist-packages/usb/core.py", line 905, in set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "/usr/local/lib/python3.7/dist-packages/usb/core.py", line 113, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/usb/core.py", line 159, in managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "/usr/local/lib/python3.7/dist-packages/usb/backend/libusb1.py", line 812, in set_configuration
    _check(self.lib.libusb_set_configuration(dev_handle.handle, config_value))
  File "/usr/local/lib/python3.7/dist-packages/usb/backend/libusb1.py", line 604, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy

我对usb设备如何通信知之甚少，我选择的接口有点随意。如果您对如何释放此资源或与设备通信有任何建议，我们将不胜感激

Answer 1

以下几点对我很有用：

if dev.is_kernel_driver_active(i):
    try:
        dev.detach_kernel_driver(i)
    except usb.core.USBError as e:
        sys.exit("Could not detatch kernel driver from interface({0}): {1}".format(i, str(e)))

如果这不起作用，使用它，但也删除dev.set_configuration()，它应该会起作用