# libusb-1.0 python wrapper from ctypes import Structure, \ CFUNCTYPE, POINTER, addressof, sizeof, cast, \ c_short, c_int, c_uint, c_size_t, c_long, \ c_uint8, c_uint16, \ c_void_p, c_char, c_char_p, py_object, string_at from ctypes.util import find_library import platform import os.path import sys class Enum(object): def __init__(self, member_dict): forward_dict = {} reverse_dict = {} module_globals = globals() next_value = 0 for name, value in member_dict.iteritems(): if value is None: value = next_value next_value += 1 forward_dict[name] = value if value in reverse_dict: raise ValueError('Multiple names for value %r: %r, %r' % (value, reverse_dict[value], name)) reverse_dict[value] = name module_globals[name] = value self.forward_dict = forward_dict self.reverse_dict = reverse_dict def __call__(self, value): return self.reverse_dict[value] def get(self, value, default=None): return self.reverse_dict.get(value, default) class USBError(Exception): def __init__(self, value): Exception.__init__(self) self.value = value def __str__(self): return '%s [%s]' % (libusb_error.get(self.value, 'Unknown error'), self.value) c_uchar = c_uint8 c_int_p = POINTER(c_int) PATH_MAX = 4096 # XXX: True on linux, no idea about others. LITTLE_ENDIAN = sys.byteorder == 'little' class timeval(Structure): _fields_ = [('tv_sec', c_long), ('tv_usec', c_long)] timeval_p = POINTER(timeval) def _loadLibrary(): system = platform.system() if system == 'Windows': from ctypes import WinDLL as dll_loader libusb_path = find_library("libusb-1.0.dll") else: from ctypes import CDLL as dll_loader libusb_path = find_library("usb-1.0") if libusb_path is None and system == 'Darwin': # macport standard library path libusb_path = '/opt/local/lib/libusb-1.0.dylib' if not os.path.isfile(libusb_path): libusb_path = None if libusb_path is None: raise Exception('Can\'t locate usb-1.0 library') loader_kw = {} if sys.version_info[:2] >= (2, 6): loader_kw['use_errno'] = True loader_kw['use_last_error'] = True return dll_loader(libusb_path, **loader_kw) libusb = _loadLibrary() # libusb.h def bswap16(x): return (((x & 0xff) << 8) | (x >> 8)) if LITTLE_ENDIAN: def libusb_cpu_to_le16(x): return x def libusb_le16_to_cpu(x): return x else: libusb_cpu_to_le16 = bswap16 libusb_le16_to_cpu = bswap16 # standard USB stuff # Device and/or Interface Class codes libusb_class_code = Enum({ # In the context of a device descriptor, # this bDeviceClass value indicates that each interface specifies its # own class information and all interfaces operate independently. 'LIBUSB_CLASS_PER_INTERFACE': 0, # Audio class 'LIBUSB_CLASS_AUDIO': 1, # Communications class 'LIBUSB_CLASS_COMM': 2, # Human Interface Device class 'LIBUSB_CLASS_HID': 3, # Printer dclass 'LIBUSB_CLASS_PRINTER': 7, # Picture transfer protocol class 'LIBUSB_CLASS_PTP': 6, # Mass storage class 'LIBUSB_CLASS_MASS_STORAGE': 8, # Hub class 'LIBUSB_CLASS_HUB': 9, # Data class 'LIBUSB_CLASS_DATA': 10, # Wireless class 'LIBUSB_CLASS_WIRELESS': 0xe0, # Application class 'LIBUSB_CLASS_APPLICATION': 0xfe, # Class is vendor-specific 'LIBUSB_CLASS_VENDOR_SPEC': 0xff }) # Descriptor types as defined by the USB specification. libusb_descriptor_type = Enum({ # Device descriptor. See libusb_device_descriptor. 'LIBUSB_DT_DEVICE': 0x01, # Configuration descriptor. See libusb_config_descriptor. 'LIBUSB_DT_CONFIG': 0x02, # String descriptor 'LIBUSB_DT_STRING': 0x03, # Interface descriptor. See libusb_interface_descriptor. 'LIBUSB_DT_INTERFACE': 0x04, # Endpoint descriptor. See libusb_endpoint_descriptor. 'LIBUSB_DT_ENDPOINT': 0x05, # HID descriptor 'LIBUSB_DT_HID': 0x21, # HID report descriptor 'LIBUSB_DT_REPORT': 0x22, # Physical descriptor 'LIBUSB_DT_PHYSICAL': 0x23, # Hub descriptor 'LIBUSB_DT_HUB': 0x29 }) # Descriptor sizes per descriptor type LIBUSB_DT_DEVICE_SIZE = 18 LIBUSB_DT_CONFIG_SIZE = 9 LIBUSB_DT_INTERFACE_SIZE = 9 LIBUSB_DT_ENDPOINT_SIZE = 7 LIBUSB_DT_ENDPOINT_AUDIO_SIZE = 9 # Audio extension LIBUSB_DT_HUB_NONVAR_SIZE = 7 USB_ENDPOINT_ADDRESS_MASK = 0x0f # in bEndpointAddress USB_ENDPOINT_DIR_MASK = 0x80 # Endpoint direction. Values for bit 7 of the endpoint address scheme. libusb_endpoint_direction = Enum({ # In: device-to-host 'LIBUSB_ENDPOINT_IN': 0x80, # Out: host-to-device 'LIBUSB_ENDPOINT_OUT': 0x00 }) LIBUSB_TRANSFER_TYPE_MASK = 0x03 # in bmAttributes # Endpoint transfer type. Values for bits 0:1 of the endpoint attributes field. libusb_transfer_type = Enum({ # Control endpoint 'LIBUSB_TRANSFER_TYPE_CONTROL': 0, # Isochronous endpoint 'LIBUSB_TRANSFER_TYPE_ISOCHRONOUS': 1, # Bulk endpoint 'LIBUSB_TRANSFER_TYPE_BULK': 2, # Interrupt endpoint 'LIBUSB_TRANSFER_TYPE_INTERRUPT': 3 }) # Standard requests, as defined in table 9-3 of the USB2 specifications libusb_standard_request = Enum({ # Request status of the specific recipient 'LIBUSB_REQUEST_GET_STATUS': 0x00, # Clear or disable a specific feature 'LIBUSB_REQUEST_CLEAR_FEATURE': 0x01, # 0x02 is reserved # Set or enable a specific feature 'LIBUSB_REQUEST_SET_FEATURE': 0x03, # 0x04 is reserved # Set device address for all future accesses 'LIBUSB_REQUEST_SET_ADDRESS': 0x05, # Get the specified descriptor 'LIBUSB_REQUEST_GET_DESCRIPTOR': 0x06, # Used to update existing descriptors or add new descriptors 'LIBUSB_REQUEST_SET_DESCRIPTOR': 0x07, # Get the current device configuration value 'LIBUSB_REQUEST_GET_CONFIGURATION': 0x08, # Set device configuration 'LIBUSB_REQUEST_SET_CONFIGURATION': 0x09, # Return the selected alternate setting for the specified interface 'LIBUSB_REQUEST_GET_INTERFACE': 0x0a, # Select an alternate interface for the specified interface 'LIBUSB_REQUEST_SET_INTERFACE': 0x0b, # Set then report an endpoint's synchronization frame 'LIBUSB_REQUEST_SYNCH_FRAME': 0x0c }) # Request type bits of the bmRequestType field in control transfers. libusb_request_type = Enum({ # Standard 'LIBUSB_TYPE_STANDARD': (0x00 << 5), # Class 'LIBUSB_TYPE_CLASS': (0x01 << 5), # Vendor 'LIBUSB_TYPE_VENDOR': (0x02 << 5), # Reserved 'LIBUSB_TYPE_RESERVED': (0x03 << 5) }) # Recipient bits of the bmRequestType field in control transfers. Values 4 # through 31 are reserved. libusb_request_recipient = Enum({ # Device 'LIBUSB_RECIPIENT_DEVICE': 0x00, # Interface 'LIBUSB_RECIPIENT_INTERFACE': 0x01, # Endpoint 'LIBUSB_RECIPIENT_ENDPOINT': 0x02, # Other 'LIBUSB_RECIPIENT_OTHER': 0x03 }) LIBUSB_ISO_SYNC_TYPE_MASK = 0x0c # Synchronization type for isochronous endpoints. Values for bits 2:3 of the # bmAttributes field in libusb_endpoint_descriptor. libusb_iso_sync_type = Enum({ # No synchronization 'LIBUSB_ISO_SYNC_TYPE_NONE': 0, # Asynchronous 'LIBUSB_ISO_SYNC_TYPE_ASYNC': 1, # Adaptive 'LIBUSB_ISO_SYNC_TYPE_ADAPTIVE': 2, # Synchronous 'LIBUSB_ISO_SYNC_TYPE_SYNC': 3 }) LIBUSB_ISO_USAGE_TYPE_MASK = 0x30 # Usage type for isochronous endpoints. Values for bits 4:5 of the # bmAttributes field in libusb_endpoint_descriptor. libusb_iso_usage_type = Enum({ # Data endpoint 'LIBUSB_ISO_USAGE_TYPE_DATA': 0, # Feedback endpoint 'LIBUSB_ISO_USAGE_TYPE_FEEDBACK': 1, # Implicit feedback Data endpoint 'LIBUSB_ISO_USAGE_TYPE_IMPLICIT': 2 }) # A structure representing the standard USB device descriptor. This # descriptor is documented in section 9.6.1 of the USB 2.0 specification. # All multiple-byte fields are represented in host-endian format. class libusb_device_descriptor(Structure): _fields_ = [# Size of this descriptor (in bytes) ('bLength', c_uint8), # Descriptor type. Will have value LIBUSB_DT_DEVICE in this # context. ('bDescriptorType', c_uint8), # USB specification release number in binary-coded decimal. A # value of 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, # etc. ('bcdUSB', c_uint16), # USB-IF class code for the device. See libusb_class_code. ('bDeviceClass', c_uint8), # USB-IF subclass code for the device, qualified by the # bDeviceClass value ('bDeviceSubClass', c_uint8), # USB-IF protocol code for the device, qualified by the # bDeviceClass and bDeviceSubClass values ('bDeviceProtocol', c_uint8), # Maximum packet size for endpoint 0 ('bMaxPacketSize0', c_uint8), # USB-IF vendor ID ('idVendor', c_uint16), # USB-IF product ID ('idProduct', c_uint16), # Device release number in binary-coded decimal ('bcdDevice', c_uint16), # Index of string descriptor describing manufacturer ('iManufacturer', c_uint8), # Index of string descriptor describing product ('iProduct', c_uint8), # Index of string descriptor containing device serial number ('iSerialNumber', c_uint8), # Number of possible configurations ('bNumConfigurations', c_uint8)] libusb_device_descriptor_p = POINTER(libusb_device_descriptor) class libusb_endpoint_descriptor(Structure): _fields_ = [('bLength', c_uint8), ('bDescriptorType', c_uint8), ('bEndpointAddress', c_uint8), ('bmAttributes', c_uint8), ('wMaxPacketSize', c_uint16), ('bInterval', c_uint8), ('bRefresh', c_uint8), ('bSynchAddress', c_uint8), ('extra', c_void_p), ('extra_length', c_int)] libusb_endpoint_descriptor_p = POINTER(libusb_endpoint_descriptor) class libusb_interface_descriptor(Structure): _fields_ = [('bLength', c_uint8), ('bDescriptorType', c_uint8), ('bInterfaceNumber', c_uint8), ('bAlternateSetting', c_uint8), ('bNumEndpoints', c_uint8), ('bInterfaceClass', c_uint8), ('bInterfaceSubClass', c_uint8), ('bInterfaceProtocol', c_uint8), ('iInterface', c_uint8), ('endpoint', libusb_endpoint_descriptor_p), ('extra', c_void_p), ('extra_length', c_int)] libusb_interface_descriptor_p = POINTER(libusb_interface_descriptor) class libusb_interface(Structure): _fields_ = [('altsetting', libusb_interface_descriptor_p), ('num_altsetting', c_int)] libusb_interface_p = POINTER(libusb_interface) class libusb_config_descriptor(Structure): _fields_ = [('bLength', c_uint8), ('bDescriptorType', c_uint8), ('wTotalLength', c_uint16), ('bNumInterfaces', c_uint8), ('bConfigurationValue', c_uint8), ('iConfiguration', c_uint8), ('bmAttributes', c_uint8), ('MaxPower', c_uint8), ('interface', libusb_interface_p), ('extra', c_void_p), ('extra_length', c_int)] libusb_config_descriptor_p = POINTER(libusb_config_descriptor) libusb_config_descriptor_p_p = POINTER(libusb_config_descriptor_p) class libusb_control_setup(Structure): _fields_ = [('bRequestType', c_uint8), ('bRequest', c_uint8), ('wValue', c_uint16), ('wIndex', c_uint16), ('wLength', c_uint16)] libusb_control_setup_p = POINTER(libusb_control_setup) LIBUSB_CONTROL_SETUP_SIZE = sizeof(libusb_control_setup) # Structure representing a libusb session. The concept of individual libusb # sessions allows for your program to use two libraries (or dynamically # load two modules) which both independently use libusb. This will prevent # interference between the individual libusb users - for example # libusb_set_debug() will not affect the other user of the library, and # libusb_exit() will not destroy resources that the other user is still # using. # # Sessions are created by libusb_init() and destroyed through libusb_exit(). # If your application is guaranteed to only ever include a single libusb # user (i.e. you), you do not have to worry about contexts: pass NULL in # every function call where a context is required. The default context # will be used. # # For more information, see \ref contexts. class libusb_context(Structure): pass libusb_context_p = POINTER(libusb_context) libusb_context_p_p = POINTER(libusb_context_p) # Structure representing a USB device detected on the system. This is an # opaque type for which you are only ever provided with a pointer, usually # originating from libusb_get_device_list(). # # Certain operations can be performed on a device, but in order to do any # I/O you will have to first obtain a device handle using libusb_open(). # # Devices are reference counted with libusb_device_ref() and # libusb_device_unref(), and are freed when the reference count reaches 0. # New devices presented by libusb_get_device_list() have a reference count of # 1, and libusb_free_device_list() can optionally decrease the reference count # on all devices in the list. libusb_open() adds another reference which is # later destroyed by libusb_close(). class libusb_device(Structure): pass libusb_device_p = POINTER(libusb_device) libusb_device_p_p = POINTER(libusb_device_p) libusb_device_p_p_p = POINTER(libusb_device_p_p) # Structure representing a handle on a USB device. This is an opaque type for # which you are only ever provided with a pointer, usually originating from # libusb_open(). # # A device handle is used to perform I/O and other operations. When finished # with a device handle, you should call libusb_close(). class libusb_device_handle(Structure): pass libusb_device_handle_p = POINTER(libusb_device_handle) libusb_device_handle_p_p = POINTER(libusb_device_handle_p) # Error codes. Most libusb functions return 0 on success or one of these # codes on failure. libusb_error = Enum({ # Success (no error) 'LIBUSB_SUCCESS': 0, # Input/output error 'LIBUSB_ERROR_IO': -1, # Invalid parameter 'LIBUSB_ERROR_INVALID_PARAM': -2, # Access denied (insufficient permissions) 'LIBUSB_ERROR_ACCESS': -3, # No such device (it may have been disconnected) 'LIBUSB_ERROR_NO_DEVICE': -4, # Entity not found 'LIBUSB_ERROR_NOT_FOUND': -5, # Resource busy 'LIBUSB_ERROR_BUSY': -6, # Operation timed out 'LIBUSB_ERROR_TIMEOUT': -7, # Overflow 'LIBUSB_ERROR_OVERFLOW': -8, # Pipe error 'LIBUSB_ERROR_PIPE': -9, # System call interrupted (perhaps due to signal) 'LIBUSB_ERROR_INTERRUPTED': -10, # Insufficient memory 'LIBUSB_ERROR_NO_MEM': -11, # Operation not supported or unimplemented on this platform 'LIBUSB_ERROR_NOT_SUPPORTED': -12, # Other error 'LIBUSB_ERROR_OTHER': -99 }) # Transfer status codes libusb_transfer_status = Enum({ # Transfer completed without error. Note that this does not indicate # that the entire amount of requested data was transferred. 'LIBUSB_TRANSFER_COMPLETED': 0, # Transfer failed 'LIBUSB_TRANSFER_ERROR': 1, # Transfer timed out 'LIBUSB_TRANSFER_TIMED_OUT': 2, # Transfer was cancelled 'LIBUSB_TRANSFER_CANCELLED': 3, # For bulk/interrupt endpoints: halt condition detected (endpoint # stalled). For control endpoints: control request not supported. 'LIBUSB_TRANSFER_STALL': 4, # Device was disconnected 'LIBUSB_TRANSFER_NO_DEVICE': 5, # Device sent more data than requested 'LIBUSB_TRANSFER_OVERFLOW': 6 }) # libusb_transfer.flags values libusb_transfer_flags = Enum({ # Report short frames as errors 'LIBUSB_TRANSFER_SHORT_NOT_OK': 1<<0, # Automatically free() transfer buffer during libusb_free_transfer() 'LIBUSB_TRANSFER_FREE_BUFFER': 1<<1, # Automatically call libusb_free_transfer() after callback returns. # If this flag is set, it is illegal to call libusb_free_transfer() # from your transfer callback, as this will result in a double-free # when this flag is acted upon. 'LIBUSB_TRANSFER_FREE_TRANSFER': 1<<2 }) # Isochronous packet descriptor. class libusb_iso_packet_descriptor(Structure): _fields_ = [('length', c_uint), ('actual_length', c_uint), ('status', c_int)] # enum libusb_transfer_status libusb_iso_packet_descriptor_p = POINTER(libusb_iso_packet_descriptor) class libusb_transfer(Structure): pass libusb_transfer_p = POINTER(libusb_transfer) libusb_transfer_cb_fn_p = CFUNCTYPE(None, libusb_transfer_p) libusb_transfer._fields_ = [('dev_handle', libusb_device_handle_p), ('flags', c_uint8), ('endpoint', c_uchar), ('type', c_uchar), ('timeout', c_uint), ('status', c_int), # enum libusb_transfer_status ('length', c_int), ('actual_length', c_int), ('callback', libusb_transfer_cb_fn_p), ('user_data', py_object), ('buffer', c_void_p), ('num_iso_packets', c_int), ('iso_packet_desc', libusb_iso_packet_descriptor) ] #int libusb_init(libusb_context **ctx); libusb_init = libusb.libusb_init libusb_init.argtypes = [libusb_context_p_p] #void libusb_exit(libusb_context *ctx); libusb_exit = libusb.libusb_exit libusb_exit.argtypes = [libusb_context_p] libusb_exit.restype = None #void libusb_set_debug(libusb_context *ctx, int level); libusb_set_debug = libusb.libusb_set_debug libusb_set_debug.argtypes = [libusb_context_p, c_int] libusb_set_debug.restype = None try: #char *libusb_strerror(enum libusb_error errcode); libusb_strerror = libusb.libusb_strerror except AttributeError: # Place holder def libusb_strerror(errcode): return None else: libusb_strerror.argtypes = [c_int] libusb_strerror.restype = c_char_p #ssize_t libusb_get_device_list(libusb_context *ctx, # libusb_device ***list); libusb_get_device_list = libusb.libusb_get_device_list libusb_get_device_list.argtypes = [libusb_context_p, libusb_device_p_p_p] libusb_get_device_list.restype = c_size_t #void libusb_free_device_list(libusb_device **list, int unref_devices); libusb_free_device_list = libusb.libusb_free_device_list libusb_free_device_list.argtypes = [libusb_device_p_p, c_int] libusb_free_device_list.restype = None #libusb_device *libusb_ref_device(libusb_device *dev); libusb_ref_device = libusb.libusb_ref_device libusb_ref_device.argtypes = [libusb_device_p] libusb_ref_device.restype = libusb_device_p #void libusb_unref_device(libusb_device *dev); libusb_unref_device = libusb.libusb_unref_device libusb_unref_device.argtypes = [libusb_device_p] libusb_unref_device.restype = None #int libusb_get_configuration(libusb_device_handle *dev, int *config); libusb_get_configuration = libusb.libusb_get_configuration libusb_get_configuration.argtypes = [libusb_device_handle_p, c_int_p] #int libusb_get_device_descriptor(libusb_device *dev, # struct libusb_device_descriptor *desc); libusb_get_device_descriptor = libusb.libusb_get_device_descriptor libusb_get_device_descriptor.argtypes = [libusb_device_p, libusb_device_descriptor_p] #int libusb_get_active_config_descriptor(libusb_device *dev, # struct libusb_config_descriptor **config); libusb_get_active_config_descriptor = libusb.libusb_get_active_config_descriptor libusb_get_active_config_descriptor.argtypes = [libusb_device_p, libusb_config_descriptor_p_p] #int libusb_get_config_descriptor(libusb_device *dev, uint8_t config_index, # struct libusb_config_descriptor **config); libusb_get_config_descriptor = libusb.libusb_get_config_descriptor libusb_get_config_descriptor.argtypes = [libusb_device_p, c_uint8, libusb_config_descriptor_p_p] #int libusb_get_config_descriptor_by_value(libusb_device *dev, # uint8_t bConfigurationValue, struct libusb_config_descriptor **config); libusb_get_config_descriptor_by_value = \ libusb.libusb_get_config_descriptor_by_value libusb_get_config_descriptor_by_value.argtypes = [libusb_device_p, c_uint8, libusb_config_descriptor_p_p] #void libusb_free_config_descriptor(struct libusb_config_descriptor *config); libusb_free_config_descriptor = libusb.libusb_free_config_descriptor libusb_free_config_descriptor.argtypes = [libusb_config_descriptor_p] libusb_free_config_descriptor.restype = None #uint8_t libusb_get_bus_number(libusb_device *dev); libusb_get_bus_number = libusb.libusb_get_bus_number libusb_get_bus_number.argtypes = [libusb_device_p] libusb_get_bus_number.restype = c_uint8 #uint8_t libusb_get_device_address(libusb_device *dev); libusb_get_device_address = libusb.libusb_get_device_address libusb_get_device_address.argtypes = [libusb_device_p] libusb_get_device_address.restype = c_uint8 #int libusb_get_max_packet_size(libusb_device *dev, unsigned char endpoint); libusb_get_max_packet_size = libusb.libusb_get_max_packet_size libusb_get_max_packet_size.argtypes = [libusb_device_p, c_uchar] #int libusb_get_max_iso_packet_size(libusb_device *dev, unsigned char endpoint); libusb_get_max_iso_packet_size = libusb.libusb_get_max_iso_packet_size libusb_get_max_iso_packet_size.argtypes = [libusb_device_p, c_uchar] #int libusb_open(libusb_device *dev, libusb_device_handle **handle); libusb_open = libusb.libusb_open libusb_open.argtypes = [libusb_device_p, libusb_device_handle_p_p] #void libusb_close(libusb_device_handle *dev_handle); libusb_close = libusb.libusb_close libusb_close.argtypes = [libusb_device_handle_p] libusb_close.restype = None #libusb_device *libusb_get_device(libusb_device_handle *dev_handle); libusb_get_device = libusb.libusb_get_device libusb_get_device.argtypes = [libusb_device_handle_p] libusb_get_device.restype = libusb_device_p #int libusb_set_configuration(libusb_device_handle *dev, int configuration); libusb_set_configuration = libusb.libusb_set_configuration libusb_set_configuration.argtypes = [libusb_device_handle_p, c_int] #int libusb_claim_interface(libusb_device_handle *dev, int iface); libusb_claim_interface = libusb.libusb_claim_interface libusb_claim_interface.argtypes = [libusb_device_handle_p, c_int] #int libusb_release_interface(libusb_device_handle *dev, int iface); libusb_release_interface = libusb.libusb_release_interface libusb_release_interface.argtypes = [libusb_device_handle_p, c_int] #libusb_device_handle *libusb_open_device_with_vid_pid(libusb_context *ctx, # uint16_t vendor_id, uint16_t product_id); libusb_open_device_with_vid_pid = libusb.libusb_open_device_with_vid_pid libusb_open_device_with_vid_pid.argtypes = [libusb_context_p, c_uint16, c_uint16] libusb_open_device_with_vid_pid.restype = libusb_device_handle_p #int libusb_set_interface_alt_setting(libusb_device_handle *dev, # int interface_number, int alternate_setting); libusb_set_interface_alt_setting = libusb.libusb_set_interface_alt_setting libusb_set_interface_alt_setting.argtypes = [libusb_device_handle_p, c_int, c_int] #int libusb_clear_halt(libusb_device_handle *dev, unsigned char endpoint); libusb_clear_halt = libusb.libusb_clear_halt libusb_clear_halt.argtypes = [libusb_device_handle_p, c_uchar] #int libusb_reset_device(libusb_device_handle *dev); libusb_reset_device = libusb.libusb_reset_device libusb_reset_device.argtypes = [libusb_device_handle_p] #int libusb_kernel_driver_active(libusb_device_handle *dev, int interface); libusb_kernel_driver_active = libusb.libusb_kernel_driver_active libusb_kernel_driver_active.argtypes = [libusb_device_handle_p, c_int] #int libusb_detach_kernel_driver(libusb_device_handle *dev, int interface); libusb_detach_kernel_driver = libusb.libusb_detach_kernel_driver libusb_detach_kernel_driver.argtypes = [libusb_device_handle_p, c_int] #int libusb_attach_kernel_driver(libusb_device_handle *dev, int interface); libusb_attach_kernel_driver = libusb.libusb_attach_kernel_driver libusb_attach_kernel_driver.argtypes = [libusb_device_handle_p, c_int] # Get the data section of a control transfer. This convenience function is here # to remind you that the data does not start until 8 bytes into the actual # buffer, as the setup packet comes first. # # Calling this function only makes sense from a transfer callback function, # or situations where you have already allocated a suitably sized buffer at # transfer->buffer. # # \param transfer a transfer # \returns pointer to the first byte of the data section def libusb_control_transfer_get_data(transfer_p): transfer = transfer_p.contents return string_at(transfer.buffer, transfer.length)[ LIBUSB_CONTROL_SETUP_SIZE:] def libusb_control_transfer_get_setup(transfer_p): return cast(transfer_p.contents.buffer, libusb_control_setup_p) def libusb_fill_control_setup(setup_p, bmRequestType, bRequest, wValue, wIndex, wLength): setup = cast(setup_p, libusb_control_setup_p).contents setup.bmRequestType = bmRequestType setup.bRequest = bRequest setup.wValue = libusb_cpu_to_le16(wValue) setup.wIndex = libusb_cpu_to_le16(wIndex) setup.wLength = libusb_cpu_to_le16(wLength) #struct libusb_transfer *libusb_alloc_transfer(int iso_packets); libusb_alloc_transfer = libusb.libusb_alloc_transfer libusb_alloc_transfer.argtypes = [c_int] libusb_alloc_transfer.restype = libusb_transfer_p #int libusb_submit_transfer(struct libusb_transfer *transfer); libusb_submit_transfer = libusb.libusb_submit_transfer libusb_submit_transfer.argtypes = [libusb_transfer_p] #int libusb_cancel_transfer(struct libusb_transfer *transfer); libusb_cancel_transfer = libusb.libusb_cancel_transfer libusb_cancel_transfer.argtypes = [libusb_transfer_p] #void libusb_free_transfer(struct libusb_transfer *transfer); libusb_free_transfer = libusb.libusb_free_transfer libusb_free_transfer.argtypes = [libusb_transfer_p] libusb_free_transfer.restype = None def libusb_fill_control_transfer(transfer_p, dev_handle, buffer, callback, user_data, timeout): transfer = transfer_p.contents transfer.dev_handle = dev_handle transfer.endpoint = 0 transfer.type = LIBUSB_TRANSFER_TYPE_CONTROL transfer.timeout = timeout transfer.buffer = cast(buffer, c_void_p) if buffer is not None: setup = cast(buffer, libusb_control_setup_p).contents transfer.length = LIBUSB_CONTROL_SETUP_SIZE + \ libusb_le16_to_cpu(setup.wLength) transfer.user_data = user_data transfer.callback = callback def libusb_fill_bulk_transfer(transfer_p, dev_handle, endpoint, buffer, length, callback, user_data, timeout): transfer = transfer_p.contents transfer.dev_handle = dev_handle transfer.endpoint = endpoint transfer.type = LIBUSB_TRANSFER_TYPE_BULK transfer.timeout = timeout transfer.buffer = cast(buffer, c_void_p) transfer.length = length transfer.user_data = user_data transfer.callback = callback def libusb_fill_interrupt_transfer(transfer_p, dev_handle, endpoint, buffer, length, callback, user_data, timeout): transfer = transfer_p.contents transfer.dev_handle = dev_handle transfer.endpoint = endpoint transfer.type = LIBUSB_TRANSFER_TYPE_INTERRUPT transfer.timeout = timeout transfer.buffer = cast(buffer, c_void_p) transfer.length = length transfer.user_data = user_data transfer.callback = callback def libusb_fill_iso_transfer(transfer_p, dev_handle, endpoint, buffer, length, num_iso_packets, callback, user_data, timeout): transfer = transfer_p.contents transfer.dev_handle = dev_handle transfer.endpoint = endpoint transfer.type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS transfer.timeout = timeout transfer.buffer = cast(buffer, c_void_p) transfer.length = length transfer.num_iso_packets = num_iso_packets transfer.user_data = user_data transfer.callback = callback def _get_iso_packet_list(transfer): list_type = libusb_iso_packet_descriptor * transfer.num_iso_packets return list_type.from_address(addressof(transfer.iso_packet_desc)) def get_iso_packet_list(transfer_p): """ Python-specific helper extracting a list of iso packet descriptors, because it's not as straight-forward as in C. """ return _get_iso_packet_list(transfer_p.contents) def _get_iso_packet_buffer(transfer, offset, length): return string_at(addressof(transfer.buffer) + offset, length) def get_iso_packet_buffer_list(transfer_p): """ Python-specific helper extracting a list of iso packet buffers. """ transfer = transfer_p.contents offset = 0 result = [] append = result.append for iso_transfer in _get_iso_packet_list(transfer): length = iso_transfer.length append(_get_iso_packet_buffer(transfer, offset, length)) offset += length return result def libusb_set_iso_packet_lengths(transfer_p, length): transfer = transfer_p.contents for iso_packet_desc in _get_iso_packet_list(transfer): iso_packet_desc.length = length def libusb_get_iso_packet_buffer(transfer_p, packet): transfer = transfer_p.contents offset = 0 if packet >= transfer.num_iso_packets: return None iso_packet_desc_list = _get_iso_packet_list(transfer) for i in xrange(packet): offset += iso_packet_desc_list[i].length return _get_iso_packet_buffer(transfer, offset, iso_packet_desc_list[packet].length) def libusb_get_iso_packet_buffer_simple(transfer_p, packet): transfer = transfer_p.contents if packet >= transfer.num_iso_packets: return None iso_length = transfer.iso_packet_desc.length return _get_iso_packet_buffer(transfer, iso_length * packet, iso_length) # sync I/O #int libusb_control_transfer(libusb_device_handle *dev_handle, # uint8_t request_type, uint8_t request, uint16_t value, uint16_t index, # unsigned char *data, uint16_t length, unsigned int timeout); libusb_control_transfer = libusb.libusb_control_transfer libusb_control_transfer.argtypes = [libusb_device_handle_p, c_uint8, c_uint8, c_uint16, c_uint16, c_void_p, c_uint16, c_uint] #int libusb_bulk_transfer(libusb_device_handle *dev_handle, # unsigned char endpoint, unsigned char *data, int length, # int *actual_length, unsigned int timeout); libusb_bulk_transfer = libusb.libusb_bulk_transfer libusb_bulk_transfer.argtypes = [libusb_device_handle_p, c_uchar, c_void_p, c_int, c_int_p, c_uint] #int libusb_interrupt_transfer(libusb_device_handle *dev_handle, # unsigned char endpoint, unsigned char *data, int length, # int *actual_length, unsigned int timeout); libusb_interrupt_transfer = libusb.libusb_interrupt_transfer libusb_interrupt_transfer.argtypes = [libusb_device_handle_p, c_uchar, c_void_p, c_int, c_int_p, c_uint] def libusb_get_descriptor(dev, desc_type, desc_index, data, length): return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN, LIBUSB_REQUEST_GET_DESCRIPTOR, (desc_type << 8) | desc_index, 0, data, length, 1000) def libusb_get_string_descriptor(dev, desc_index, langid, data, length): return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN, LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | desc_index, langid, data, length, 1000) #int libusb_get_string_descriptor_ascii(libusb_device_handle *dev, # uint8_t index, unsigned char *data, int length); libusb_get_string_descriptor_ascii = libusb.libusb_get_string_descriptor_ascii libusb_get_string_descriptor_ascii.argtypes = [libusb_device_handle_p, c_uint8, c_void_p, c_int] # polling and timeouts #int libusb_try_lock_events(libusb_context *ctx); libusb_try_lock_events = libusb.libusb_try_lock_events libusb_try_lock_events.argtypes = [libusb_context_p] #void libusb_lock_events(libusb_context *ctx); libusb_lock_events = libusb.libusb_lock_events libusb_lock_events.argtypes = [libusb_context_p] #void libusb_unlock_events(libusb_context *ctx); libusb_unlock_events = libusb.libusb_unlock_events libusb_unlock_events.argtypes = [libusb_context_p] libusb_unlock_events.restype = None #int libusb_event_handling_ok(libusb_context *ctx); libusb_event_handling_ok = libusb.libusb_event_handling_ok libusb_event_handling_ok.argtypes = [libusb_context_p] #int libusb_event_handler_active(libusb_context *ctx); libusb_event_handler_active = libusb.libusb_event_handler_active libusb_event_handler_active.argtypes = [libusb_context_p] #void libusb_lock_event_waiters(libusb_context *ctx); libusb_lock_event_waiters = libusb.libusb_lock_event_waiters libusb_lock_event_waiters.argtypes = [libusb_context_p] libusb_lock_event_waiters.restype = None #void libusb_unlock_event_waiters(libusb_context *ctx); libusb_unlock_event_waiters = libusb.libusb_unlock_event_waiters libusb_unlock_event_waiters.argtypes = [] libusb_unlock_event_waiters.restype = None #int libusb_wait_for_event(libusb_context *ctx, struct timeval *tv); libusb_wait_for_event = libusb.libusb_wait_for_event libusb_wait_for_event.argtypes = [libusb_context_p, timeval_p] #int libusb_handle_events_timeout(libusb_context *ctx, struct timeval *tv); libusb_handle_events_timeout = libusb.libusb_handle_events_timeout libusb_handle_events_timeout.argtypes = [libusb_context_p, timeval_p] #int libusb_handle_events(libusb_context *ctx); libusb_handle_events = libusb.libusb_handle_events libusb_handle_events.argtypes = [libusb_context_p] #int libusb_handle_events_locked(libusb_context *ctx, struct timeval *tv); libusb_handle_events_locked = libusb.libusb_handle_events_locked libusb_handle_events_locked.argtypes = [libusb_context_p, timeval_p] #int libusb_get_next_timeout(libusb_context *ctx, struct timeval *tv); libusb_get_next_timeout = libusb.libusb_get_next_timeout libusb_get_next_timeout.argtypes = [libusb_context_p, timeval_p] class libusb_pollfd(Structure): _fields_ = [('fd', c_int), ('events', c_short)] libusb_pollfd_p = POINTER(libusb_pollfd) libusb_pollfd_p_p = POINTER(libusb_pollfd_p) libusb_pollfd_added_cb_p = CFUNCTYPE(None, c_int, c_short, py_object) libusb_pollfd_removed_cb_p = CFUNCTYPE(None, c_int, py_object) #const struct libusb_pollfd **libusb_get_pollfds(libusb_context *ctx); libusb_get_pollfds = libusb.libusb_get_pollfds libusb_get_pollfds.argtypes = [libusb_context_p] libusb_get_pollfds.restype = libusb_pollfd_p_p #void libusb_set_pollfd_notifiers(libusb_context *ctx, # libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, # void *user_data); libusb_set_pollfd_notifiers = libusb.libusb_set_pollfd_notifiers libusb_set_pollfd_notifiers.argtypes = [libusb_context_p, libusb_pollfd_added_cb_p, libusb_pollfd_removed_cb_p, py_object] libusb_set_pollfd_notifiers.restype = None # /libusb.h