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/*
* 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) 2016 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 "py/runtime.h"
#include "shared-bindings/_bleio/__init__.h"
#include "shared-bindings/_bleio/Descriptor.h"
#include "shared-bindings/_bleio/Service.h"
#include "shared-bindings/_bleio/UUID.h"
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) {
self->characteristic = characteristic;
self->uuid = uuid;
self->handle = BLE_GATT_HANDLE_INVALID;
self->read_perm = read_perm;
self->write_perm = write_perm;
self->value = mp_obj_new_bytes(initial_value_bufinfo->buf, initial_value_bufinfo->len);
const mp_int_t max_length_max = fixed_length ? BLE_GATTS_FIX_ATTR_LEN_MAX : BLE_GATTS_VAR_ATTR_LEN_MAX;
if (max_length < 0 || max_length > max_length_max) {
mp_raise_ValueError_varg(translate("max_length must be 0-%d when fixed_length is %s"),
max_length_max, fixed_length ? "True" : "False");
}
self->max_length = max_length;
self->fixed_length = fixed_length;
common_hal_bleio_descriptor_set_value(self, initial_value_bufinfo);
}
bleio_uuid_obj_t *common_hal_bleio_descriptor_get_uuid(bleio_descriptor_obj_t *self) {
return self->uuid;
}
bleio_characteristic_obj_t *common_hal_bleio_descriptor_get_characteristic(bleio_descriptor_obj_t *self) {
return self->characteristic;
}
size_t common_hal_bleio_descriptor_get_value(bleio_descriptor_obj_t *self, uint8_t *buf, size_t len) {
// Do GATT operations only if this descriptor has been registered
if (self->handle != BLE_GATT_HANDLE_INVALID) {
if (common_hal_bleio_service_get_is_remote(self->characteristic->service)) {
// uint16_t conn_handle = bleio_connection_get_conn_handle(self->characteristic->service->connection);
// FIX have att_read_req fill in a buffer
// uint8_t rsp[MAX(len, 512)];
// return att_read_req(conn_handle, self->handle, rsp, len);
return 0;
} else {
mp_buffer_info_t bufinfo;
if (!mp_get_buffer(self->value, &bufinfo, MP_BUFFER_READ)) {
return 0;
}
const size_t actual_length = MIN(len, bufinfo.len);
memcpy(buf, bufinfo.buf, actual_length);
return actual_length;
}
}
return 0;
}
void common_hal_bleio_descriptor_set_value(bleio_descriptor_obj_t *self, mp_buffer_info_t *bufinfo) {
if (self->fixed_length && bufinfo->len != self->max_length) {
mp_raise_ValueError(translate("Value length != required fixed length"));
}
if (bufinfo->len > self->max_length) {
mp_raise_ValueError(translate("Value length > max_length"));
}
self->value = mp_obj_new_bytes(bufinfo->buf, bufinfo->len);
// Do GATT operations only if this descriptor has been registered.
if (self->handle != BLE_GATT_HANDLE_INVALID) {
if (common_hal_bleio_service_get_is_remote(self->characteristic->service)) {
// FIX
// uint16_t conn_handle = bleio_connection_get_conn_handle(self->service->connection);
// att_write_req(conn_handle, self->handle, bufinfo->buf, bufinfo->len, rsp);
} else {
// Always write the value locally even if no connections are active.
if (self->fixed_length && bufinfo->len != self->max_length) {
return;
}
if (bufinfo->len > self->max_length) {
return;
}
self->value = mp_obj_new_bytes(bufinfo->buf, bufinfo->len);
}
}
}
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