def initialisation(self):
"""
initialisation de la liaison usb
:return: un handle sur la liaison usb (self.handle)
"""
print('Initialisation usb')
libusb1.libusb_init(NULL)
libusb1.libusb_set_debug(NULL, 3)
self.handle = libusb1.libusb_open_device_with_vid_pid(NULL, self.my_vid, self.my_pid)
libusb1.libusb_claim_interface(self.handle, 0)
print('Initialisation usb ........ ok')
def claimInterface(self, interface):
"""
Claim (= get exclusive access to) given interface number. Required to
receive/send data.
"""
result = libusb1.libusb_claim_interface(self.__handle, interface)
if result:
raise libusb1.USBError(result)
def open_cp2130():
context = libusb1.libusb_context_p()
deviceList = libusb1.libusb_device_p_p()
deviceCount = 0
deviceDescriptor = libusb1.libusb_device_descriptor()
device = libusb1.libusb_device_p()
cp2130Handle = libusb1.libusb_device_handle_p()
kernelAttached = 0
if libusb1.libusb_init(byref(context)) != 0:
print('Could not initialize libusb!')
exit_cp2130()
deviceCount = libusb1.libusb_get_device_list(context, byref(deviceList))
if deviceCount <= 0:
print('No devices found!')
exit_cp2130()
for i in range(0, deviceCount):
if libusb1.libusb_get_device_descriptor(deviceList[i],
byref(deviceDescriptor)) == 0:
if (deviceDescriptor.idVendor
== 0x10C4) and (deviceDescriptor.idProduct == 0x87A0):
device = deviceList[i]
break
if device == None:
print('CP2130 device not found!')
exit_cp2130()
if libusb1.libusb_open(device, byref(cp2130Handle)) != 0:
print('Could not open device!')
exit_cp2130()
if libusb1.libusb_kernel_driver_active(cp2130Handle, 0) != 0:
libusb1.libusb_detach_kernel_driver(cp2130Handle, 0)
kernelAttached = 1
if libusb1.libusb_claim_interface(cp2130Handle, 0) != 0:
print('Could not claim interface!')
exit_cp2130()
if cp2130_libusb_set_usb_config(cp2130Handle) == False:
exit_cp2130()
if cp2130_libusb_set_spi_word(cp2130Handle) == False:
exit_cp2130()
print('Successfully opened CP2130!')
return cp2130Handle, kernelAttached, deviceList, context
def connectToBoard(self, board):
# open device
if libusb1.libusb_open(self.device, byref(self.cp2130Handle)) != 0:
print('Could not open device!')
return
# See if a kernel driver is active already, if so detach it and store a flag so we can reattach when we are done
if libusb1.libusb_kernel_driver_active(self.cp2130Handle, 0) != 0:
libusb1.libusb_detach_kernel_driver(self.cp2130Handle, 0)
self.kernelAttached = 1
# claim the device
if libusb1.libusb_claim_interface(self.cp2130Handle, 0) != 0:
print('Could not claim interface!')
return
print("Connected to {}".format(board))
cp2130_libusb_set_spi_word(self.cp2130Handle)
cp2130_libusb_set_usb_config(self.cp2130Handle)
self.connStateChanged.emit(True)
def claimInterface(self, interface):
result = libusb1.libusb_claim_interface(self.handle, interface)
if result:
raise libusb1.USBError, result