嗨,是的,我正在编写一个 python3 程序,它应该将文件的内容发送到 LPC1758。为了测试,我将在 USB 上方写一个简单的字符串。我使用 libusb1.0 ....
但是每次我成为同样的错误时,即使我将“dev”重命名为“device”,错误也是一样的。--> AttributeError: 'MainWindow' 对象没有属性 'dev'<--
class MainWindow(QtGui.QMainWindow, form_class):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.setupUi(self)
self.pb_send.clicked.connect(self.pb_send_clicked)
self.pb_open.clicked.connect(self.pb_open_clicked)
self.pb_exit.clicked.connect(self.pb_exit_clicked)
# SEND button event handler
def pb_send_clicked(self):
send = "Yo Man"
bulk_out_ep = 0x05
bulk_in_ep = 0x82
interface = 0
length = 30
dev = usb.core.find(idVendor= 0xfefe, idProduct= 0x0001)
cfg = usb.control.get_configuration(dev) # get current configuration
print(dev)
if dev is None:
self.USB_label.setText("Device not found !!!")
raise ValueError('Device not found')
else:
self.USB_label.setText("Device found")
found = 1
if(cfg != 1): # check if device is configured
usb.DeviceHandle.setConfiguration(self, 1)
usb.util.claim_interface(dev, interface)
usb.DeviceHandle.bulkWrite(self,bulk_out_ep,send)
print("wrote to estick")
readData = usb.DeviceHandle.bulkRead(self, bulk_in_ep, length)
print("read from estick: "+ readData)
usb.util.release_interface(dev, interface)
这是 Stacktrace 显示的内容:
Traceback (most recent call last):
File "/home/user/workspace_Qt/ESS_project/ess_project.py", line 93, in pb_send_clicked
readData = usb.DeviceHandle.bulkRead(self,endpoint=bulk_in_ep,size=length)
File "/usr/lib/python3.3/usb/legacy.py", line 159, in bulkRead
return self.dev.read(endpoint, size, self.__claimed_interface, timeout)
AttributeError: 'MainWindow' object has no attribute 'dev'