98 lines
4.3 KiB
C
98 lines
4.3 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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* 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 "py/runtime.h"
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#include "shared-bindings/_bleio/__init__.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/UUID.h"
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void common_hal_bleio_descriptor_construct(bleio_descriptor_obj_t *self, bleio_characteristic_obj_t *characteristic, bleio_uuid_obj_t *uuid, bleio_attribute_security_mode_t read_perm, bleio_attribute_security_mode_t write_perm, mp_int_t max_length, bool fixed_length, mp_buffer_info_t *initial_value_bufinfo) {
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self->characteristic = characteristic;
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self->uuid = uuid;
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self->handle = BLE_GATT_HANDLE_INVALID;
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self->read_perm = read_perm;
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self->write_perm = write_perm;
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const mp_int_t max_length_max = fixed_length ? BLE_GATTS_FIX_ATTR_LEN_MAX : BLE_GATTS_VAR_ATTR_LEN_MAX;
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if (max_length < 0 || max_length > max_length_max) {
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mp_raise_ValueError_varg(translate("max_length must be 0-%d when fixed_length is %s"),
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max_length_max, fixed_length ? "True" : "False");
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}
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self->max_length = max_length;
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self->fixed_length = fixed_length;
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common_hal_bleio_descriptor_set_value(self, initial_value_bufinfo);
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}
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bleio_uuid_obj_t *common_hal_bleio_descriptor_get_uuid(bleio_descriptor_obj_t *self) {
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return self->uuid;
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}
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bleio_characteristic_obj_t *common_hal_bleio_descriptor_get_characteristic(bleio_descriptor_obj_t *self) {
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return self->characteristic;
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}
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size_t common_hal_bleio_descriptor_get_value(bleio_descriptor_obj_t *self, uint8_t* buf, size_t len) {
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// Do GATT operations only if this descriptor has been registered
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if (self->handle != BLE_GATT_HANDLE_INVALID) {
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uint16_t conn_handle = bleio_connection_get_conn_handle(self->characteristic->service->connection);
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if (common_hal_bleio_service_get_is_remote(self->characteristic->service)) {
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return common_hal_bleio_gattc_read(self->handle, conn_handle, buf, len);
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} else {
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return common_hal_bleio_gatts_read(self->handle, conn_handle, buf, len);
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}
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}
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return 0;
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}
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void common_hal_bleio_descriptor_set_value(bleio_descriptor_obj_t *self, mp_buffer_info_t *bufinfo) {
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if (self->fixed_length && bufinfo->len != self->max_length) {
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mp_raise_ValueError(translate("Value length != required fixed length"));
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}
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if (bufinfo->len > self->max_length) {
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mp_raise_ValueError(translate("Value length > max_length"));
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}
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self->value = mp_obj_new_bytes(bufinfo->buf, bufinfo->len);
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// Do GATT operations only if this descriptor has been registered.
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if (self->handle != BLE_GATT_HANDLE_INVALID) {
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uint16_t conn_handle = bleio_connection_get_conn_handle(self->characteristic->service->connection);
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if (common_hal_bleio_service_get_is_remote(self->characteristic->service)) {
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// false means WRITE_REQ, not write-no-response
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common_hal_bleio_gattc_write(self->handle, conn_handle, bufinfo, false);
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} else {
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common_hal_bleio_gatts_write(self->handle, conn_handle, bufinfo);
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}
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}
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}
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