Contiki-NG
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ieee-addr.c
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1/*
2 * Copyright (c) 2018, Texas Instruments Incorporated - http://www.ti.com/
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holder nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30/**
31 * \addtogroup cc13xx-cc26xx-rf-ieee-addr
32 * @{
33 *
34 * \file
35 * Implementation of the CC13xx/CC26xx IEEE addresses driver.
36 * \author
37 * Edvard Pettersen <e.pettersen@ti.com>
38 */
39/*---------------------------------------------------------------------------*/
40#include "contiki.h"
41#include "net/linkaddr.h"
42
43#include "rf/ieee-addr.h"
44#include "ieee-addr-id.h"
45/*---------------------------------------------------------------------------*/
46#include <ti/devices/DeviceFamily.h>
47#include DeviceFamily_constructPath(inc/hw_memmap.h)
48#include DeviceFamily_constructPath(inc/hw_fcfg1.h)
49#include DeviceFamily_constructPath(inc/hw_ccfg.h)
50/*---------------------------------------------------------------------------*/
51#include <stdint.h>
52#include <string.h>
53/*---------------------------------------------------------------------------*/
54#define IEEE_ADDR_HARDCODED IEEE_ADDR_CONF_HARDCODED
55#define IEEE_ADDR_ADDRESS IEEE_ADDR_CONF_ADDRESS
56/*---------------------------------------------------------------------------*/
57#define IEEE_MAC_PRIMARY_ADDRESS (FCFG1_BASE + FCFG1_O_MAC_15_4_0)
58#define IEEE_MAC_SECONDARY_ADDRESS (CCFG_BASE + CCFG_O_IEEE_MAC_0)
59/*---------------------------------------------------------------------------*/
60int
61ieee_addr_cpy_to(uint8_t *dst, uint8_t len)
62{
63 if(len > LINKADDR_SIZE) {
64 return -1;
65 }
66
67 if(IEEE_ADDR_HARDCODED) {
68 const uint8_t ieee_addr_hc[LINKADDR_SIZE] = IEEE_ADDR_ADDRESS;
69
70 memcpy(dst, &ieee_addr_hc[LINKADDR_SIZE - len], len);
71 } else {
72 int i;
73
74 volatile const uint8_t *const primary = (uint8_t *)IEEE_MAC_PRIMARY_ADDRESS;
75 volatile const uint8_t *const secondary = (uint8_t *)IEEE_MAC_SECONDARY_ADDRESS;
76
77 /* Reading from primary location... */
78 volatile const uint8_t *ieee_addr = primary;
79
80 /*
81 * ...unless we can find a byte != 0xFF in secondary.
82 *
83 * Intentionally checking all 8 bytes here instead of len, because we
84 * are checking validity of the entire address respective of the
85 * actual number of bytes the caller wants to copy over.
86 */
87 for(i = 0; i < len; i++) {
88 if(secondary[i] != 0xFF) {
89 /* A byte in the secondary location is not 0xFF. Use the secondary */
90 ieee_addr = secondary;
91 break;
92 }
93 }
94
95 /*
96 * We have chosen what address to read the address from. Do so,
97 * in inverted byte order.
98 */
99 for(i = 0; i < len; i++) {
100 dst[i] = ieee_addr[len - 1 - i];
101 }
102 }
103
104#ifdef IEEE_ADDR_NODE_ID
105 dst[len - 1] = (IEEE_ADDR_NODE_ID >> 0) & 0xFF;
106 dst[len - 2] = (IEEE_ADDR_NODE_ID >> 8) & 0xFF;
107#endif
108
109 return 0;
110}
111/*---------------------------------------------------------------------------*/
112/** @} */
void ieee_addr_cpy_to(uint8_t *dst, uint8_t len)
Definition ieee-addr.c:47
Header file for the link-layer address representation.