197 lines
7.8 KiB
C
197 lines
7.8 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) 2019 Dan Halbert for Adafruit Industries
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* Copyright (c) 2018 Artur Pacholec
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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 "ble_drv.h"
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#include "ble.h"
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#include "py/runtime.h"
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#include "common-hal/_bleio/__init__.h"
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#include "shared-bindings/_bleio/Characteristic.h"
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#include "shared-bindings/_bleio/Descriptor.h"
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#include "shared-bindings/_bleio/Service.h"
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#include "shared-bindings/_bleio/Adapter.h"
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STATIC void _indicate_service_change(uint16_t start, uint16_t end) {
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for (size_t i = 0; i < BLEIO_TOTAL_CONNECTION_COUNT; i++) {
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bleio_connection_internal_t *connection = &bleio_connections[i];
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uint16_t conn_handle = connection->conn_handle;
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if (connection->conn_handle == BLE_CONN_HANDLE_INVALID) {
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continue;
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}
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sd_ble_gatts_service_changed(conn_handle, start, end);
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}
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}
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uint32_t _common_hal_bleio_service_construct(bleio_service_obj_t *self, bleio_uuid_obj_t *uuid, bool is_secondary, mp_obj_list_t *characteristic_list) {
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self->handle = 0xFFFF;
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self->uuid = uuid;
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self->characteristic_list = characteristic_list;
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self->is_remote = false;
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self->connection = NULL;
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self->is_secondary = is_secondary;
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ble_uuid_t nordic_uuid;
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bleio_uuid_convert_to_nrf_ble_uuid(uuid, &nordic_uuid);
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uint8_t service_type = BLE_GATTS_SRVC_TYPE_PRIMARY;
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if (is_secondary) {
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service_type = BLE_GATTS_SRVC_TYPE_SECONDARY;
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}
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uint32_t result = sd_ble_gatts_service_add(service_type, &nordic_uuid, &self->handle);
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// Do a service changed indication to all connected peers.
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if (result == NRF_SUCCESS) {
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_indicate_service_change(self->handle, self->handle);
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}
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return result;
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}
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void common_hal_bleio_service_construct(bleio_service_obj_t *self, bleio_uuid_obj_t *uuid, bool is_secondary) {
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check_nrf_error(_common_hal_bleio_service_construct(self, uuid, is_secondary,
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mp_obj_new_list(0, NULL)));
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}
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void bleio_service_from_connection(bleio_service_obj_t *self, mp_obj_t connection) {
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self->handle = 0xFFFF;
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self->uuid = NULL;
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self->characteristic_list = mp_obj_new_list(0, NULL);
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self->is_remote = true;
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self->is_secondary = false;
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self->connection = connection;
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}
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bleio_uuid_obj_t *common_hal_bleio_service_get_uuid(bleio_service_obj_t *self) {
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return self->uuid;
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}
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mp_obj_tuple_t *common_hal_bleio_service_get_characteristics(bleio_service_obj_t *self) {
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return mp_obj_new_tuple(self->characteristic_list->len, self->characteristic_list->items);
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}
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bool common_hal_bleio_service_get_is_remote(bleio_service_obj_t *self) {
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return self->is_remote;
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}
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bool common_hal_bleio_service_get_is_secondary(bleio_service_obj_t *self) {
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return self->is_secondary;
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}
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STATIC void _expand_range(uint16_t new_value, uint16_t *start, uint16_t *end) {
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if (new_value == 0) {
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return;
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}
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*start = MIN(*start, new_value);
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*end = MAX(*end, new_value);
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}
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void common_hal_bleio_service_add_characteristic(bleio_service_obj_t *self,
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bleio_characteristic_obj_t *characteristic,
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mp_buffer_info_t *initial_value_bufinfo,
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const char *user_description) {
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ble_gatts_char_md_t char_md = {
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.char_props.broadcast = (characteristic->props & CHAR_PROP_BROADCAST) ? 1 : 0,
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.char_props.read = (characteristic->props & CHAR_PROP_READ) ? 1 : 0,
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.char_props.write_wo_resp = (characteristic->props & CHAR_PROP_WRITE_NO_RESPONSE) ? 1 : 0,
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.char_props.write = (characteristic->props & CHAR_PROP_WRITE) ? 1 : 0,
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.char_props.notify = (characteristic->props & CHAR_PROP_NOTIFY) ? 1 : 0,
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.char_props.indicate = (characteristic->props & CHAR_PROP_INDICATE) ? 1 : 0,
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};
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ble_gatts_attr_md_t cccd_md = {
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.vloc = BLE_GATTS_VLOC_STACK,
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};
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ble_uuid_t char_uuid = {};
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bleio_uuid_convert_to_nrf_ble_uuid(characteristic->uuid, &char_uuid);
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ble_gatts_attr_md_t char_attr_md = {
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.vloc = BLE_GATTS_VLOC_STACK,
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.vlen = !characteristic->fixed_length,
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};
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if (char_md.char_props.notify || char_md.char_props.indicate) {
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
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// Make CCCD write permission match characteristic read permission.
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bleio_attribute_gatts_set_security_mode(&cccd_md.write_perm, characteristic->read_perm);
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char_md.p_cccd_md = &cccd_md;
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}
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ble_gatts_attr_md_t user_desc_md = {};
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if (user_description != NULL && strlen(user_description) > 0) {
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&user_desc_md.read_perm);
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// If the description is on the Python heap, then have the SD copy it. If not, assume it's
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// static and will live for longer than the SD.
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user_desc_md.vloc = gc_nbytes(user_description) > 0 ? BLE_GATTS_VLOC_STACK : BLE_GATTS_VLOC_USER;
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char_md.p_user_desc_md = &user_desc_md;
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char_md.p_char_user_desc = (const uint8_t *)user_description;
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char_md.char_user_desc_max_size = strlen(user_description);
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char_md.char_user_desc_size = strlen(user_description);
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}
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bleio_attribute_gatts_set_security_mode(&char_attr_md.read_perm, characteristic->read_perm);
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bleio_attribute_gatts_set_security_mode(&char_attr_md.write_perm, characteristic->write_perm);
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#if CIRCUITPY_VERBOSE_BLE
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// Turn on read authorization so that we receive an event to print on every read.
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char_attr_md.rd_auth = true;
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#endif
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ble_gatts_attr_t char_attr = {
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.p_uuid = &char_uuid,
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.p_attr_md = &char_attr_md,
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.init_len = characteristic->initial_value_len,
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.p_value = (uint8_t *)characteristic->initial_value,
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.init_offs = 0,
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.max_len = characteristic->max_length,
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};
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ble_gatts_char_handles_t char_handles;
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check_nrf_error(sd_ble_gatts_characteristic_add(self->handle, &char_md, &char_attr, &char_handles));
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characteristic->user_desc_handle = char_handles.user_desc_handle;
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characteristic->cccd_handle = char_handles.cccd_handle;
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characteristic->sccd_handle = char_handles.sccd_handle;
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characteristic->handle = char_handles.value_handle;
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// Indicate that the attribute table has changed.
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uint16_t start = char_handles.value_handle;
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uint16_t end = char_handles.value_handle;
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_expand_range(char_handles.cccd_handle, &start, &end);
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_expand_range(char_handles.sccd_handle, &start, &end);
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_expand_range(char_handles.user_desc_handle, &start, &end);
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_indicate_service_change(start, end);
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#if CIRCUITPY_VERBOSE_BLE
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mp_printf(&mp_plat_print, "Char handle %x user %x cccd %x sccd %x\n", characteristic->handle, characteristic->user_desc_handle, characteristic->cccd_handle, characteristic->sccd_handle);
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#endif
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mp_obj_list_append(self->characteristic_list, MP_OBJ_FROM_PTR(characteristic));
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}
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