Question

我写了一个小的python脚本来从数字温度计读取数据，并且一切都可以在我的计算机上正常工作。但是，我需要在其他系统中运行相同的脚本，但是我不断收到“ [Errno 10060]操作超时”错误。

在第二台计算机上，我可以看到该设备，端点和所有内容，但是当我尝试从中读取信息时，我遇到了错误。

这是代码（我有意未设置设备的配置，因为我正试图加快阅读速度，而在我的系统中，这没有必要）：

import usb.core

def get_temp(T):

    # find our device
    dev = usb.core.find(idVendor=0x04d9, idProduct=0xe000)
    # was it found?
    if dev is None:
        raise ValueError('Device not found')

    # poll the thermometer for current temperature
    t = dev.read(0x83, 32) # gets 32 bytes from ENDPOINT address 0x83

因此，在我编写此代码的计算机中，它按预期运行，并且返回了一个不错的32字节数组。但是在其他系统中，我得到了错误：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\usb\core.py", line 402, in read
    return self.device.read(self, size_or_buffer, timeout)
  File "C:\Python27\lib\site-packages\usb\core.py", line 988, in read
    self.__get_timeout(timeout))
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 851, in 
intr_read
    timeout)
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 936, in 
__read
    _check(retval)
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 595, in 
_check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 10060] Operation timed out

这次我也尝试设置设备配置，但仍然是相同的错误。

关于我可能会缺少的任何想法？

编辑：这是我的输出日志，其中PYUSB_DEBUG环境变量设置为调试：

>>> dev.read(0x83,32)
2019-01-11 10:35:06,951 DEBUG:usb.backend.libusb1:_LibUSB.get_configuration(<usb.backend.libusb1._DeviceHandle object at 0x02A2A610>)
2019-01-11 10:35:06,953 DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0)
2019-01-11 10:35:06,954 DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0, 0, 0)
2019-01-11 10:35:06,956 DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0)
2019-01-11 10:35:06,957 DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0, 0, 0, 0)
2019-01-11 10:35:06,957 DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0, 0, 0)
2019-01-11 10:35:06,957 DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device object at 0x02A2A650>, 0)
2019-01-11 10:35:06,957 DEBUG:usb.backend.libusb1:_LibUSB.claim_interface(<usb.backend.libusb1._DeviceHandle object at 0x02A2A610>, 0)
2019-01-11 10:35:06,957 DEBUG:usb.backend.libusb1:_LibUSB.intr_read(<usb.backend.libusb1._DeviceHandle object at 0x02A2A610>, 131, 0, array('B', [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]), 1000)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\usb\core.py", line 988, in read
    self.__get_timeout(timeout))
  File "C:\Python27\lib\site-packages\usb\_debug.py", line 60, in do_trace
    return f(*args, **named_args)
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 851, in intr_read
    timeout)
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 936, in __read
    _check(retval)
  File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 595, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 10060] Operation timed out
>>>

使用PyUSB读取不同系统中的USB设备时出现问题

0 个答案: