ae30a1e5aa
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
99 lines
3.8 KiB
C
99 lines
3.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Dan Halbert for Adafruit Industries
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* Copyright (c) 2018 Artur Pacholec
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* Copyright (c) 2016 Glenn Ruben Bakke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "py/runtime.h"
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#include "common-hal/_bleio/UUID.h"
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#include "shared-bindings/_bleio/__init__.h"
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#include "shared-bindings/_bleio/Adapter.h"
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#include "ble.h"
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#include "ble_drv.h"
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#include "nrf_error.h"
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// If uuid128 is NULL, this is a Bluetooth SIG 16-bit UUID.
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// If uuid128 is not NULL, it's a 128-bit (16-byte) UUID, with bytes 12 and 13 zero'd out, where
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// the 16-bit part goes. Those 16 bits are passed in uuid16.
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void common_hal_bleio_uuid_construct(bleio_uuid_obj_t *self, uint32_t uuid16, const uint8_t uuid128[]) {
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self->nrf_ble_uuid.uuid = uuid16;
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if (uuid128 == NULL) {
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self->nrf_ble_uuid.type = BLE_UUID_TYPE_BLE;
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} else {
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ble_uuid128_t vs_uuid;
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memcpy(vs_uuid.uuid128, uuid128, sizeof(vs_uuid.uuid128));
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// Register this vendor-specific UUID. Bytes 12 and 13 will be zero.
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const uint32_t err_code = sd_ble_uuid_vs_add(&vs_uuid, &self->nrf_ble_uuid.type);
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if (err_code != NRF_SUCCESS) {
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mp_raise_OSError_msg_varg(translate("Failed to register Vendor-Specific UUID, err 0x%04x"), err_code);
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}
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vm_used_ble = true;
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}
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}
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uint32_t common_hal_bleio_uuid_get_size(bleio_uuid_obj_t *self) {
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return self->nrf_ble_uuid.type == BLE_UUID_TYPE_BLE ? 16 : 128;
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}
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uint32_t common_hal_bleio_uuid_get_uuid16(bleio_uuid_obj_t *self) {
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return self->nrf_ble_uuid.uuid;
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}
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void common_hal_bleio_uuid_get_uuid128(bleio_uuid_obj_t *self, uint8_t uuid128[16]) {
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uint8_t length;
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const uint32_t err_code = sd_ble_uuid_encode(&self->nrf_ble_uuid, &length, uuid128);
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if (err_code != NRF_SUCCESS) {
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mp_raise_OSError_msg_varg(translate("Could not decode ble_uuid, err 0x%04x"), err_code);
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}
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}
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void common_hal_bleio_uuid_pack_into(bleio_uuid_obj_t *self, uint8_t* buf) {
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if (self->nrf_ble_uuid.type == BLE_UUID_TYPE_BLE) {
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buf[0] = self->nrf_ble_uuid.uuid & 0xff;
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buf[1] = self->nrf_ble_uuid.uuid >> 8;
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} else {
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common_hal_bleio_uuid_get_uuid128(self, buf);
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}
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}
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void bleio_uuid_construct_from_nrf_ble_uuid(bleio_uuid_obj_t *self, ble_uuid_t *nrf_ble_uuid) {
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if (nrf_ble_uuid->type == BLE_UUID_TYPE_UNKNOWN) {
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mp_raise_RuntimeError(translate("Unexpected nrfx uuid type"));
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}
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self->nrf_ble_uuid.uuid = nrf_ble_uuid->uuid;
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self->nrf_ble_uuid.type = nrf_ble_uuid->type;
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}
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// Fill in a ble_uuid_t from my values.
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void bleio_uuid_convert_to_nrf_ble_uuid(bleio_uuid_obj_t *self, ble_uuid_t *nrf_ble_uuid) {
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nrf_ble_uuid->uuid = self->nrf_ble_uuid.uuid;
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nrf_ble_uuid->type = self->nrf_ble_uuid.type;
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}
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