/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2019 Dan Halbert for Adafruit Industries * Copyright (c) 2018 Artur Pacholec * Copyright (c) 2017 Glenn Ruben Bakke * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "py/objproperty.h" #include "py/runtime.h" #include "shared-bindings/_bleio/Attribute.h" #include "shared-bindings/_bleio/Characteristic.h" #include "shared-bindings/_bleio/Service.h" #include "shared-bindings/_bleio/UUID.h" //| class Characteristic: //| """Stores information about a BLE service characteristic and allows reading //| and writing of the characteristic's value.""" //| //| def __init__(self) -> None: //| """There is no regular constructor for a Characteristic. A new local Characteristic can be created //| and attached to a Service by calling `add_to_service()`. //| Remote Characteristic objects are created by `Connection.discover_remote_services()` //| as part of remote Services.""" //| ... //| def add_to_service( //| self, //| service: Service, //| uuid: UUID, //| *, //| properties: int = 0, //| read_perm: int = Attribute.OPEN, //| write_perm: int = Attribute.OPEN, //| max_length: int = 20, //| fixed_length: bool = False, //| initial_value: Optional[ReadableBuffer] = None, //| user_description: Optional[str] = None //| ) -> Characteristic: //| """Create a new Characteristic object, and add it to this Service. //| //| :param Service service: The service that will provide this characteristic //| :param UUID uuid: The uuid of the characteristic //| :param int properties: The properties of the characteristic, //| specified as a bitmask of these values bitwise-or'd together: //| `BROADCAST`, `INDICATE`, `NOTIFY`, `READ`, `WRITE`, `WRITE_NO_RESPONSE`. //| :param int read_perm: Specifies whether the characteristic can be read by a client, and if so, which //| security mode is required. Must be one of the integer values `Attribute.NO_ACCESS`, `Attribute.OPEN`, //| `Attribute.ENCRYPT_NO_MITM`, `Attribute.ENCRYPT_WITH_MITM`, `Attribute.LESC_ENCRYPT_WITH_MITM`, //| `Attribute.SIGNED_NO_MITM`, or `Attribute.SIGNED_WITH_MITM`. //| :param int write_perm: Specifies whether the characteristic can be written by a client, and if so, which //| security mode is required. Values allowed are the same as ``read_perm``. //| :param int max_length: Maximum length in bytes of the characteristic value. The maximum allowed is //| is 512, or possibly 510 if ``fixed_length`` is False. The default, 20, is the maximum //| number of data bytes that fit in a single BLE 4.x ATT packet. //| :param bool fixed_length: True if the characteristic value is of fixed length. //| :param ~circuitpython_typing.ReadableBuffer initial_value: The initial value for this characteristic. If not given, will be //| filled with zeros. //| :param str user_description: User friendly description of the characteristic //| //| :return: the new Characteristic.""" //| ... STATIC mp_obj_t bleio_characteristic_add_to_service(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { // class is arg[0], which we can ignore. enum { ARG_service, ARG_uuid, ARG_properties, ARG_read_perm, ARG_write_perm, ARG_max_length, ARG_fixed_length, ARG_initial_value, ARG_user_description }; static const mp_arg_t allowed_args[] = { { MP_QSTR_service, MP_ARG_REQUIRED | MP_ARG_OBJ }, { MP_QSTR_uuid, MP_ARG_REQUIRED | MP_ARG_OBJ }, { MP_QSTR_properties, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} }, { MP_QSTR_read_perm, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SECURITY_MODE_OPEN} }, { MP_QSTR_write_perm, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SECURITY_MODE_OPEN} }, { MP_QSTR_max_length, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 20} }, { MP_QSTR_fixed_length, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} }, { MP_QSTR_initial_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} }, { MP_QSTR_user_description, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} }, }; mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); bleio_service_obj_t *service = mp_arg_validate_type(args[ARG_service].u_obj, &bleio_service_type, MP_QSTR_service); bleio_uuid_obj_t *uuid = mp_arg_validate_type(args[ARG_uuid].u_obj, &bleio_uuid_type, MP_QSTR_uuid); const bleio_characteristic_properties_t properties = args[ARG_properties].u_int; if (properties & ~CHAR_PROP_ALL) { mp_arg_error_invalid(MP_QSTR_properties); } const bleio_attribute_security_mode_t read_perm = args[ARG_read_perm].u_int; common_hal_bleio_attribute_security_mode_check_valid(read_perm); const bleio_attribute_security_mode_t write_perm = args[ARG_write_perm].u_int; common_hal_bleio_attribute_security_mode_check_valid(write_perm); const mp_int_t max_length_int = mp_arg_validate_int_min(args[ARG_max_length].u_int, 0, MP_QSTR_max_length); const size_t max_length = (size_t)max_length_int; const bool fixed_length = args[ARG_fixed_length].u_bool; mp_obj_t initial_value = args[ARG_initial_value].u_obj; mp_buffer_info_t initial_value_bufinfo; if (initial_value == mp_const_none) { if (fixed_length && max_length > 0) { initial_value = mp_obj_new_bytes_of_zeros(max_length); } else { initial_value = mp_const_empty_bytes; } } mp_get_buffer_raise(initial_value, &initial_value_bufinfo, MP_BUFFER_READ); if (initial_value_bufinfo.len > max_length || (fixed_length && initial_value_bufinfo.len != max_length)) { mp_raise_ValueError(MP_ERROR_TEXT("initial_value length is wrong")); } const char *user_description = NULL; if (args[ARG_user_description].u_obj != mp_const_none) { user_description = mp_obj_str_get_str(args[ARG_user_description].u_obj); } bleio_characteristic_obj_t *characteristic = mp_obj_malloc(bleio_characteristic_obj_t, &bleio_characteristic_type); // Range checking on max_length arg is done by the common_hal layer, because // it may vary depending on underlying BLE implementation. common_hal_bleio_characteristic_construct( characteristic, service, 0, uuid, properties, read_perm, write_perm, max_length, fixed_length, &initial_value_bufinfo, user_description); return MP_OBJ_FROM_PTR(characteristic); } STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bleio_characteristic_add_to_service_fun_obj, 1, bleio_characteristic_add_to_service); STATIC MP_DEFINE_CONST_CLASSMETHOD_OBJ(bleio_characteristic_add_to_service_obj, MP_ROM_PTR(&bleio_characteristic_add_to_service_fun_obj)); //| properties: int //| """An int bitmask representing which properties are set, specified as bitwise or'ing of //| of these possible values. //| `BROADCAST`, `INDICATE`, `NOTIFY`, `READ`, `WRITE`, `WRITE_NO_RESPONSE`.""" STATIC mp_obj_t bleio_characteristic_get_properties(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_characteristic_get_properties(self)); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_properties_obj, bleio_characteristic_get_properties); MP_PROPERTY_GETTER(bleio_characteristic_properties_obj, (mp_obj_t)&bleio_characteristic_get_properties_obj); //| uuid: Optional[UUID] //| """The UUID of this characteristic. (read-only) //| //| Will be ``None`` if the 128-bit UUID for this characteristic is not known.""" STATIC mp_obj_t bleio_characteristic_get_uuid(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); bleio_uuid_obj_t *uuid = common_hal_bleio_characteristic_get_uuid(self); return uuid ? MP_OBJ_FROM_PTR(uuid) : mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_uuid_obj, bleio_characteristic_get_uuid); MP_PROPERTY_GETTER(bleio_characteristic_uuid_obj, (mp_obj_t)&bleio_characteristic_get_uuid_obj); //| value: bytearray //| """The value of this characteristic.""" STATIC mp_obj_t bleio_characteristic_get_value(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); uint8_t temp[512]; size_t actual_len = common_hal_bleio_characteristic_get_value(self, temp, sizeof(temp)); return mp_obj_new_bytearray(actual_len, temp); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_value_obj, bleio_characteristic_get_value); STATIC mp_obj_t bleio_characteristic_set_value(mp_obj_t self_in, mp_obj_t value_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); mp_buffer_info_t bufinfo; mp_get_buffer_raise(value_in, &bufinfo, MP_BUFFER_READ); common_hal_bleio_characteristic_set_value(self, &bufinfo); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_2(bleio_characteristic_set_value_obj, bleio_characteristic_set_value); MP_PROPERTY_GETSET(bleio_characteristic_value_obj, (mp_obj_t)&bleio_characteristic_get_value_obj, (mp_obj_t)&bleio_characteristic_set_value_obj); //| max_length: int //| """The max length of this characteristic.""" STATIC mp_obj_t bleio_characteristic_get_max_length(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_characteristic_get_max_length(self)); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_max_length_obj, bleio_characteristic_get_max_length); MP_PROPERTY_GETTER(bleio_characteristic_max_length_obj, (mp_obj_t)&bleio_characteristic_get_max_length_obj); //| descriptors: Descriptor //| """A tuple of :py:class:`Descriptor` objects related to this characteristic. (read-only)""" STATIC mp_obj_t bleio_characteristic_get_descriptors(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); // Return list as a tuple so user won't be able to change it. return MP_OBJ_FROM_PTR(common_hal_bleio_characteristic_get_descriptors(self)); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_descriptors_obj, bleio_characteristic_get_descriptors); MP_PROPERTY_GETTER(bleio_characteristic_descriptors_obj, (mp_obj_t)&bleio_characteristic_get_descriptors_obj); //| service: Service //| """The Service this Characteristic is a part of.""" STATIC mp_obj_t bleio_characteristic_get_service(mp_obj_t self_in) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); return common_hal_bleio_characteristic_get_service(self); } STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_characteristic_get_service_obj, bleio_characteristic_get_service); MP_PROPERTY_GETTER(bleio_characteristic_service_obj, (mp_obj_t)&bleio_characteristic_get_service_obj); //| def set_cccd(self, *, notify: bool = False, indicate: bool = False) -> None: //| """Set the remote characteristic's CCCD to enable or disable notification and indication. //| //| :param bool notify: True if Characteristic should receive notifications of remote writes //| :param float indicate: True if Characteristic should receive indications of remote writes //| """ //| ... STATIC mp_obj_t bleio_characteristic_set_cccd(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]); enum { ARG_notify, ARG_indicate }; static const mp_arg_t allowed_args[] = { { MP_QSTR_notify, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} }, { MP_QSTR_indicate, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} }, }; mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); common_hal_bleio_characteristic_set_cccd(self, args[ARG_notify].u_bool, args[ARG_indicate].u_bool); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bleio_characteristic_set_cccd_obj, 1, bleio_characteristic_set_cccd); STATIC const mp_rom_map_elem_t bleio_characteristic_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_add_to_service), MP_ROM_PTR(&bleio_characteristic_add_to_service_obj) }, { MP_ROM_QSTR(MP_QSTR_descriptors), MP_ROM_PTR(&bleio_characteristic_descriptors_obj) }, { MP_ROM_QSTR(MP_QSTR_properties), MP_ROM_PTR(&bleio_characteristic_properties_obj) }, { MP_ROM_QSTR(MP_QSTR_uuid), MP_ROM_PTR(&bleio_characteristic_uuid_obj) }, { MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&bleio_characteristic_value_obj) }, { MP_ROM_QSTR(MP_QSTR_set_cccd), MP_ROM_PTR(&bleio_characteristic_set_cccd_obj) }, // Bitmask constants to represent properties //| BROADCAST: int //| """property: allowed in advertising packets""" //| //| INDICATE: int //| """property: server will indicate to the client when the value is set and wait for a response""" //| //| NOTIFY: int //| """property: server will notify the client when the value is set""" //| //| READ: int //| """property: clients may read this characteristic""" //| //| WRITE: int //| """property: clients may write this characteristic; a response will be sent back""" //| //| WRITE_NO_RESPONSE: int //| """property: clients may write this characteristic; no response will be sent back""" //| { MP_ROM_QSTR(MP_QSTR_BROADCAST), MP_ROM_INT(CHAR_PROP_BROADCAST) }, { MP_ROM_QSTR(MP_QSTR_INDICATE), MP_ROM_INT(CHAR_PROP_INDICATE) }, { MP_ROM_QSTR(MP_QSTR_NOTIFY), MP_ROM_INT(CHAR_PROP_NOTIFY) }, { MP_ROM_QSTR(MP_QSTR_READ), MP_ROM_INT(CHAR_PROP_READ) }, { MP_ROM_QSTR(MP_QSTR_WRITE), MP_ROM_INT(CHAR_PROP_WRITE) }, { MP_ROM_QSTR(MP_QSTR_WRITE_NO_RESPONSE), MP_ROM_INT(CHAR_PROP_WRITE_NO_RESPONSE) }, }; STATIC MP_DEFINE_CONST_DICT(bleio_characteristic_locals_dict, bleio_characteristic_locals_dict_table); STATIC void bleio_characteristic_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { bleio_characteristic_obj_t *self = MP_OBJ_TO_PTR(self_in); if (self->uuid) { mp_printf(print, "Characteristic("); bleio_uuid_print(print, MP_OBJ_FROM_PTR(self->uuid), kind); mp_printf(print, ")"); } else { mp_printf(print, ""); } } MP_DEFINE_CONST_OBJ_TYPE( bleio_characteristic_type, MP_QSTR_Characteristic, MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS, print, bleio_characteristic_print, locals_dict, &bleio_characteristic_locals_dict );