circuitpython/shared-bindings/_bleio/ScanEntry.c
Scott Shawcroft ae30a1e5aa
Refine _bleio
This PR refines the _bleio API. It was originally motivated by
the addition of a new CircuitPython service that enables reading
and modifying files on the device. Moving the BLE lifecycle outside
of the VM motivated a number of changes to remove heap allocations
in some APIs.

It also motivated unifying connection initiation to the Adapter class
rather than the Central and Peripheral classes which have been removed.
Adapter now handles the GAP portion of BLE including advertising, which
has moved but is largely unchanged, and scanning, which has been enhanced
to return an iterator of filtered results.

Once a connection is created (either by us (aka Central) or a remote
device (aka Peripheral)) it is represented by a new Connection class.
This class knows the current connection state and can discover and
instantiate remote Services along with their Characteristics and
Descriptors.

Relates to #586
2019-10-21 18:57:03 -07:00

178 lines
7.3 KiB
C

/*
* 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 <string.h>
#include "py/objproperty.h"
#include "py/runtime.h"
#include "shared-bindings/_bleio/Address.h"
#include "shared-bindings/_bleio/ScanEntry.h"
#include "shared-bindings/_bleio/UUID.h"
#include "shared-module/_bleio/ScanEntry.h"
//| .. currentmodule:: _bleio
//|
//| :class:`ScanEntry` -- BLE scan data
//| =========================================================
//|
//| Encapsulates information about a device that was received during scanning. It can be
//| advertisement or scan response data. This object may only be created by a `_bleio.ScanResults`:
//| it has no user-visible constructor.
//|
//| .. class:: ScanEntry()
//|
//| Cannot be instantiated directly. Use `_bleio.Adapter.start_scan`.
//|
//| .. method:: matches(prefixes, *, all=True)
//|
//| Returns True if the ScanEntry matches all prefixes when ``all`` is True. This is stricter
//| than the scan filtering which accepts any advertisements that match any of the prefixes
//| where all is False.
//|
STATIC mp_obj_t bleio_scanentry_matches(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
enum { ARG_prefixes, ARG_all };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_prefixes, MP_ARG_OBJ | MP_ARG_REQUIRED },
{ MP_QSTR_all, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = true} },
};
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);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[ARG_prefixes].u_obj, &bufinfo, MP_BUFFER_READ);
return mp_obj_new_bool(common_hal_bleio_scanentry_matches(self, bufinfo.buf, bufinfo.len, args[ARG_all].u_bool));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bleio_scanentry_matches_obj, 2, bleio_scanentry_matches);
//| .. attribute:: address
//|
//| The address of the device (read-only), of type `_bleio.Address`.
//|
STATIC mp_obj_t bleio_scanentry_get_address(mp_obj_t self_in) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(self_in);
return common_hal_bleio_scanentry_get_address(self);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanentry_get_address_obj, bleio_scanentry_get_address);
const mp_obj_property_t bleio_scanentry_address_obj = {
.base.type = &mp_type_property,
.proxy = { (mp_obj_t)&bleio_scanentry_get_address_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj },
};
//| .. attribute:: advertisement_bytes
//|
//| All the advertisement data present in the packet, returned as a ``bytes`` object. (read-only)
//|
STATIC mp_obj_t scanentry_get_advertisement_bytes(mp_obj_t self_in) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(self_in);
return common_hal_bleio_scanentry_get_advertisement_bytes(self);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanentry_get_advertisement_bytes_obj, scanentry_get_advertisement_bytes);
const mp_obj_property_t bleio_scanentry_advertisement_bytes_obj = {
.base.type = &mp_type_property,
.proxy = { (mp_obj_t)&bleio_scanentry_get_advertisement_bytes_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj },
};
//| .. attribute:: rssi
//|
//| The signal strength of the device at the time of the scan, in integer dBm. (read-only)
//|
STATIC mp_obj_t scanentry_get_rssi(mp_obj_t self_in) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_int(common_hal_bleio_scanentry_get_rssi(self));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanentry_get_rssi_obj, scanentry_get_rssi);
const mp_obj_property_t bleio_scanentry_rssi_obj = {
.base.type = &mp_type_property,
.proxy = { (mp_obj_t)&bleio_scanentry_get_rssi_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj },
};
//| .. attribute:: connectable
//|
//| True if the device can be connected to. (read-only)
//|
STATIC mp_obj_t scanentry_get_connectable(mp_obj_t self_in) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_bool(common_hal_bleio_scanentry_get_connectable(self));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanentry_get_connectable_obj, scanentry_get_connectable);
const mp_obj_property_t bleio_scanentry_connectable_obj = {
.base.type = &mp_type_property,
.proxy = { (mp_obj_t)&bleio_scanentry_get_connectable_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj },
};
//| .. attribute:: scan_response
//|
//| True if the entry was a scan response. (read-only)
//|
STATIC mp_obj_t scanentry_get_scan_response(mp_obj_t self_in) {
bleio_scanentry_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_bool(common_hal_bleio_scanentry_get_scan_response(self));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanentry_get_scan_response_obj, scanentry_get_scan_response);
const mp_obj_property_t bleio_scanentry_scan_response_obj = {
.base.type = &mp_type_property,
.proxy = { (mp_obj_t)&bleio_scanentry_get_scan_response_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj },
};
STATIC const mp_rom_map_elem_t bleio_scanentry_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_address), MP_ROM_PTR(&bleio_scanentry_address_obj) },
{ MP_ROM_QSTR(MP_QSTR_advertisement_bytes), MP_ROM_PTR(&bleio_scanentry_advertisement_bytes_obj) },
{ MP_ROM_QSTR(MP_QSTR_rssi), MP_ROM_PTR(&bleio_scanentry_rssi_obj) },
{ MP_ROM_QSTR(MP_QSTR_connectable), MP_ROM_PTR(&bleio_scanentry_connectable_obj) },
{ MP_ROM_QSTR(MP_QSTR_scan_response), MP_ROM_PTR(&bleio_scanentry_scan_response_obj) },
{ MP_ROM_QSTR(MP_QSTR_matches), MP_ROM_PTR(&bleio_scanentry_matches_obj) },
};
STATIC MP_DEFINE_CONST_DICT(bleio_scanentry_locals_dict, bleio_scanentry_locals_dict_table);
const mp_obj_type_t bleio_scanentry_type = {
{ &mp_type_type },
.name = MP_QSTR_ScanEntry,
.locals_dict = (mp_obj_dict_t*)&bleio_scanentry_locals_dict
};