circuitpython/devices/ble_hci/common-hal/_bleio/Service.c

131 lines
5.1 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Dan Halbert for Adafruit Industries
* Copyright (c) 2018 Artur Pacholec
*
* 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/runtime.h"
#include "shared-bindings/_bleio/__init__.h"
#include "shared-bindings/_bleio/Characteristic.h"
#include "shared-bindings/_bleio/Descriptor.h"
#include "shared-bindings/_bleio/Service.h"
#include "shared-bindings/_bleio/Adapter.h"
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) {
self->uuid = uuid;
self->characteristic_list = characteristic_list;
self->is_remote = false;
self->connection = NULL;
self->is_secondary = is_secondary;
vm_used_ble = true;
self->handle = bleio_adapter_add_attribute(&common_hal_bleio_adapter_obj, MP_OBJ_TO_PTR(self));
self->start_handle = self->handle;
self->end_handle = self->handle;
if (self->handle == BLE_GATT_HANDLE_INVALID) {
return 1;
}
return 0;
}
void common_hal_bleio_service_construct(bleio_service_obj_t *self, bleio_uuid_obj_t *uuid, bool is_secondary) {
if (_common_hal_bleio_service_construct(self, uuid, is_secondary,
mp_obj_new_list(0, NULL)) != 0) {
mp_raise_RuntimeError(translate("Failed to add service"));
}
}
void bleio_service_from_connection(bleio_service_obj_t *self, mp_obj_t connection) {
self->handle = 0xFFFF;
self->uuid = NULL;
self->characteristic_list = mp_obj_new_list(0, NULL);
self->is_remote = true;
self->is_secondary = false;
self->connection = connection;
}
bleio_uuid_obj_t *common_hal_bleio_service_get_uuid(bleio_service_obj_t *self) {
return self->uuid;
}
mp_obj_tuple_t *common_hal_bleio_service_get_characteristics(bleio_service_obj_t *self) {
return mp_obj_new_tuple(self->characteristic_list->len, self->characteristic_list->items);
}
bool common_hal_bleio_service_get_is_remote(bleio_service_obj_t *self) {
return self->is_remote;
}
bool common_hal_bleio_service_get_is_secondary(bleio_service_obj_t *self) {
return self->is_secondary;
}
void common_hal_bleio_service_add_characteristic(bleio_service_obj_t *self,
bleio_characteristic_obj_t *characteristic,
mp_buffer_info_t *initial_value_bufinfo,
const char *user_description) {
if (self->handle != common_hal_bleio_adapter_obj.last_added_service_handle) {
mp_raise_bleio_BluetoothError(
translate("Characteristic can only be added to most recently added service"));
}
characteristic->decl_handle = bleio_adapter_add_attribute(
&common_hal_bleio_adapter_obj, MP_OBJ_TO_PTR(characteristic));
// This is the value handle.
characteristic->handle = bleio_adapter_add_attribute(
&common_hal_bleio_adapter_obj, MP_OBJ_TO_PTR(characteristic));
self->end_handle = characteristic->handle;
if (characteristic->props & (CHAR_PROP_NOTIFY | CHAR_PROP_INDICATE)) {
// We need a CCCD if this characteristic is doing notify or indicate.
bleio_descriptor_obj_t *cccd = m_new_obj(bleio_descriptor_obj_t);
cccd->base.type = &bleio_descriptor_type;
uint16_t zero = 0;
mp_buffer_info_t zero_cccd_value = {
.buf = &zero,
.len = sizeof(zero),
};
common_hal_bleio_descriptor_construct(
cccd,
characteristic,
&cccd_uuid, // 0x2902
SECURITY_MODE_OPEN, // CCCD read perm
characteristic->read_perm, // Make CCCD write perm match characteristic read perm.
2, // 2 bytes
true, // fixed length
&zero_cccd_value // Initial value is 0.
);
// Adds CCCD to attribute table, and also extends self->end_handle to include the CCCD.
common_hal_bleio_characteristic_add_descriptor(characteristic, cccd);
characteristic->cccd = cccd;
}
mp_obj_list_append(self->characteristic_list, MP_OBJ_FROM_PTR(characteristic));
}