小编din*_*ece的帖子

我正在尝试在我的PC和PIC18F4550之间进行通信,但是程序没有检测到它,而计算机正在设备管理器中显示它.

import usb.core

dev = usb.core.find(idVendor = 0x04D8, idProduct = 0xFEAA)

检查USB设备的功能:

def find(find_all = False, backend = None, custom_match = None, **args):
    def device_iter(k, v):
        for dev in backend.enumerate_devices():
            d = Device(dev, backend)
            if  _interop._reduce(lambda a, b: a and b,map(operator.eq,v,map(lambda i:getattr(d,i),k)),True)and (custom_match is None or custom_match(d)):
                yield d
        if backend is None:
            import usb.backend.libusb1 as libusb1
            import usb.backend.libusb0 as libusb0
            import usb.backend.openusb as openusb

            for m in (libusb1, openusb, libusb0):
                backend = m.get_backend()
                if backend is not …

    import cv2
    ram_frames=30
    cam = cv2.VideoCapture(0)
    def get_image():
          cap = cam.read()
          return cap
    for i in xrange(ramp_frames):
              temp = get_image()
    image = get_image()
    cv2.imwrite('bin/color.jpg',image)

我得到的错误是:

File "C:\modules\imlib.py", line 1035, in __init__
    self.imin = self.WinWebCam()
  File "C:\modules\imlib.py", line 1125, in WinWebCam
    cv2.imwrite('bin/color.jpg',image)
TypeError: img is not a numerical tuple

我做了一切正确我没有改变任何代码,当在一个单独的程序中执行它没有显示任何错误,但在我的代码中运行它显示错误.我复制的代码来自此链接