nimble/controller/include/controller/ble_ll_utils.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include <stdint.h>

#define INT16_GT(_a, _b) ((int16_t)((_a) - (_b)) > 0)
#define INT16_LT(_a, _b) ((int16_t)((_a) - (_b)) < 0)
#define INT16_LTE(_a, _b) ((int16_t)((_a) - (_b)) <= 0)

#define MIN(_a, _b) ((_a) < (_b) ? (_a) : (_b))
#define MAX(_a, _b) ((_a) > (_b) ? (_a) : (_b))
#define CLAMP(_n, _min, _max) (MAX(_min, MIN(_n, _max)))
#define IN_RANGE(_n, _min, _max) (((_n) >= (_min)) && ((_n) <= (_max)))

int ble_ll_utils_verify_aa(uint32_t aa);
uint32_t ble_ll_utils_calc_aa(void);
uint32_t ble_ll_utils_calc_seed_aa(void);
uint32_t ble_ll_utils_calc_big_aa(uint32_t seed_aa, uint32_t n);

uint8_t ble_ll_utils_chan_map_remap(const uint8_t *chan_map, uint8_t remap_index);
uint8_t ble_ll_utils_chan_map_used_get(const uint8_t *chan_map);

uint8_t ble_ll_utils_dci_csa2(uint16_t counter, uint16_t chan_id,
                              uint8_t num_used_chans, const uint8_t *chan_map);
uint16_t ble_ll_utils_dci_iso_event(uint16_t counter, uint16_t chan_id,
                                    uint16_t *prn_sub_lu, uint8_t chan_map_used,
                                    const uint8_t *chan_map, uint16_t *remap_idx);
uint16_t ble_ll_utils_dci_iso_subevent(uint16_t chan_id, uint16_t *prn_sub_lu,
                                       uint8_t chan_map_used, const uint8_t *chan_map,
                                       uint16_t *remap_idx);

uint32_t ble_ll_utils_calc_window_widening(uint32_t anchor_point,
                                           uint32_t last_anchor_point,
                                           uint8_t central_sca);