Uttam Bhat / LoRaWAN-SX1276-Application-Demo

SX1276 Shield based Applications

Dependencies:   X_NUCLEO_IKS01A1 LoRaWAN-lib SX1276Lib mbed

LoRaWAN-SX1276-Application Demo uses SX1276MB1LAS mbed component shield on a nucleo board platform to demonstrate a Class-A LoRaWAN device in the 915MHz ISM band for North American region. It uses the LoRaWAN-lib and SX1276Lib libraries.

Comissioning.h (LoRaWAN Network Configuration)

The end-device can be activated in one of the two ways:

Over the Air (OTA) activation can be enabled as shown in the figure below. /media/uploads/ubhat/ota_enable.png

The end-device must be configured with the following parameters:

  • LORAWAN_DEVICE_EUI (8 Bytes) : Fist 3 Bytes is the Organizationally Unique Identifier (OUI) followed by 5 bytes of unique ID. If not defined by user, then the firmware automatically assigns one to the end-device
  • LORAWAN_APPLICATION_EUI (8 Bytes)
  • LORAWAN_APPLICATION_KEY (or DEVKEY) (16 Bytes)

/media/uploads/ubhat/ota_eui.png

Activation by Personalization (ABP) can be enabled as shown in the figure below. /media/uploads/ubhat/abp_enable.png

The end-device must be configured with the following parameters:

  • LORAWAN_DEVICE_ADDRESS (4 Bytes) : If not defined by user, then the firmware automatically assigns one to the end-device
  • LORAWAN_NWKSKEY (16 Bytes)
  • LORAWAN_APPSKEY (16 Bytes)

/media/uploads/ubhat/abp_key.png

Config.h (LoRaWAN Communication Parameters)

  • Mode of Operation : Hybrid If the end-device needs to be configured to operate over 8-channels, then Hybrid Mode needs to be enabled /media/uploads/ubhat/hybridenable.png
  • Mode of Operation : Frequency Hop If the end-device needs to be configured to operate over 64-channels, then Hybrid Mode needs to be disabled
  • Delay between successive JOIN REQUESTs : The delay between successive Join Requests (until the end-device joins the network) can be configured using the parameter OVER_THE_AIR_ACTIVATION_DUTYCYCLE
  • Inter-Frame Delay : One can change the delay between each frame transmission using APP_TX_DUTYCYCLE It is advisable that APP_TX_DUTYCYCLE is greater than or equal to 3sec.
  • Data Rate : The data rate can be configured as per LoRaWAN specification using the paramter LORAWAN_DEFAULT_DATARATE. The range of values are DR_0, DR_1, DR_2, DR_3 and DR_4
  • Confirmed/Unconfirmed Messages : The uplink message or payload can be chosen to be confirmed or unconfirmed using the parameter LORAWAN_CONFIRMED_MSG_ON. When set to 1, the transmitted messages need to be confirmed with an ACK by the network server in the subsequent RX window. When set to 0, no ACK is requested.
  • ADR ON/OFF : The ADR can be enabled or disabled using the parameter LORAWAN_ADR_ON. When set to 1, ADR is enabled and disabled when set to 0.
  • Application Port : The application port can be set using parameter LORAWAN_APP_PORT. A few examples are associated to specific Application Port, and are defined in Config.h
  • Payload Length : The lenght of the payload (in bytes) to be transmitted can be configured using LORAWAN_APP_DATA_SIZE
  • Transmit Power : The transmit power can be configured using LORAWAN_TX_POWER (LoRaMAC verifies if the set power is compliant with the LoRaWAN spec and FCC guidelines)

/media/uploads/ubhat/loraconfig.png

The baud-rate for serial terminal display is 115200

system/crypto/cmac.cpp@0:42863a11464a, 2016-08-26 (annotated)

Committer:
ubhat
Date:
Fri Aug 26 19:36:35 2016 +0000
Revision:
0:42863a11464a
SX1276 Shield based Applications

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ubhat 0:42863a11464a 1 /**************************************************************************
ubhat 0:42863a11464a 2 Copyright (C) 2009 Lander Casado, Philippas Tsigas
ubhat 0:42863a11464a 3
ubhat 0:42863a11464a 4 All rights reserved.
ubhat 0:42863a11464a 5
ubhat 0:42863a11464a 6 Permission is hereby granted, free of charge, to any person obtaining
ubhat 0:42863a11464a 7 a copy of this software and associated documentation files
ubhat 0:42863a11464a 8 (the "Software"), to deal with the Software without restriction, including
ubhat 0:42863a11464a 9 without limitation the rights to use, copy, modify, merge, publish,
ubhat 0:42863a11464a 10 distribute, sublicense, and/or sell copies of the Software, and to
ubhat 0:42863a11464a 11 permit persons to whom the Software is furnished to do so, subject to
ubhat 0:42863a11464a 12 the following conditions:
ubhat 0:42863a11464a 13
ubhat 0:42863a11464a 14 Redistributions of source code must retain the above copyright notice,
ubhat 0:42863a11464a 15 this list of conditions and the following disclaimers. Redistributions in
ubhat 0:42863a11464a 16 binary form must reproduce the above copyright notice, this list of
ubhat 0:42863a11464a 17 conditions and the following disclaimers in the documentation and/or
ubhat 0:42863a11464a 18 other materials provided with the distribution.
ubhat 0:42863a11464a 19
ubhat 0:42863a11464a 20 In no event shall the authors or copyright holders be liable for any special,
ubhat 0:42863a11464a 21 incidental, indirect or consequential damages of any kind, or any damages
ubhat 0:42863a11464a 22 whatsoever resulting from loss of use, data or profits, whether or not
ubhat 0:42863a11464a 23 advised of the possibility of damage, and on any theory of liability,
ubhat 0:42863a11464a 24 arising out of or in connection with the use or performance of this software.
ubhat 0:42863a11464a 25
ubhat 0:42863a11464a 26 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
ubhat 0:42863a11464a 27 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ubhat 0:42863a11464a 28 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ubhat 0:42863a11464a 29 CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ubhat 0:42863a11464a 30 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
ubhat 0:42863a11464a 31 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
ubhat 0:42863a11464a 32 DEALINGS WITH THE SOFTWARE
ubhat 0:42863a11464a 33
ubhat 0:42863a11464a 34 *****************************************************************************/
ubhat 0:42863a11464a 35 //#include <sys/param.h>
ubhat 0:42863a11464a 36 //#include <sys/systm.h>
ubhat 0:42863a11464a 37 #include <stdint.h>
ubhat 0:42863a11464a 38 #include "aes.h"
ubhat 0:42863a11464a 39 #include "cmac.h"
ubhat 0:42863a11464a 40 #include "utilities.h"
ubhat 0:42863a11464a 41
ubhat 0:42863a11464a 42 #define LSHIFT(v, r) do { \
ubhat 0:42863a11464a 43 int32_t i; \
ubhat 0:42863a11464a 44 for (i = 0; i < 15; i++) \
ubhat 0:42863a11464a 45 (r)[i] = (v)[i] << 1 | (v)[i + 1] >> 7; \
ubhat 0:42863a11464a 46 (r)[15] = (v)[15] << 1; \
ubhat 0:42863a11464a 47 } while (0)
ubhat 0:42863a11464a 48
ubhat 0:42863a11464a 49 #define XOR(v, r) do { \
ubhat 0:42863a11464a 50 int32_t i; \
ubhat 0:42863a11464a 51 for (i = 0; i < 16; i++) \
ubhat 0:42863a11464a 52 { \
ubhat 0:42863a11464a 53 (r)[i] = (r)[i] ^ (v)[i]; \
ubhat 0:42863a11464a 54 } \
ubhat 0:42863a11464a 55 } while (0) \
ubhat 0:42863a11464a 56
ubhat 0:42863a11464a 57
ubhat 0:42863a11464a 58 void AES_CMAC_Init(AES_CMAC_CTX *ctx)
ubhat 0:42863a11464a 59 {
ubhat 0:42863a11464a 60 memset1(ctx->X, 0, sizeof ctx->X);
ubhat 0:42863a11464a 61 ctx->M_n = 0;
ubhat 0:42863a11464a 62 memset1(ctx->rijndael.ksch, '\0', 240);
ubhat 0:42863a11464a 63 }
ubhat 0:42863a11464a 64
ubhat 0:42863a11464a 65 void AES_CMAC_SetKey(AES_CMAC_CTX *ctx, const uint8_t key[AES_CMAC_KEY_LENGTH])
ubhat 0:42863a11464a 66 {
ubhat 0:42863a11464a 67 //rijndael_set_key_enc_only(&ctx->rijndael, key, 128);
ubhat 0:42863a11464a 68 aes_set_key( key, AES_CMAC_KEY_LENGTH, &ctx->rijndael);
ubhat 0:42863a11464a 69 }
ubhat 0:42863a11464a 70
ubhat 0:42863a11464a 71 void AES_CMAC_Update(AES_CMAC_CTX *ctx, const uint8_t *data, uint32_t len)
ubhat 0:42863a11464a 72 {
ubhat 0:42863a11464a 73 uint32_t mlen;
ubhat 0:42863a11464a 74 uint8_t in[16];
ubhat 0:42863a11464a 75
ubhat 0:42863a11464a 76 if (ctx->M_n > 0) {
ubhat 0:42863a11464a 77 mlen = MIN(16 - ctx->M_n, len);
ubhat 0:42863a11464a 78 memcpy1(ctx->M_last + ctx->M_n, data, mlen);
ubhat 0:42863a11464a 79 ctx->M_n += mlen;
ubhat 0:42863a11464a 80 if (ctx->M_n < 16 || len == mlen)
ubhat 0:42863a11464a 81 return;
ubhat 0:42863a11464a 82 XOR(ctx->M_last, ctx->X);
ubhat 0:42863a11464a 83 //rijndael_encrypt(&ctx->rijndael, ctx->X, ctx->X);
ubhat 0:42863a11464a 84 aes_encrypt( ctx->X, ctx->X, &ctx->rijndael);
ubhat 0:42863a11464a 85 data += mlen;
ubhat 0:42863a11464a 86 len -= mlen;
ubhat 0:42863a11464a 87 }
ubhat 0:42863a11464a 88 while (len > 16) { /* not last block */
ubhat 0:42863a11464a 89
ubhat 0:42863a11464a 90 XOR(data, ctx->X);
ubhat 0:42863a11464a 91 //rijndael_encrypt(&ctx->rijndael, ctx->X, ctx->X);
ubhat 0:42863a11464a 92
ubhat 0:42863a11464a 93 memcpy1(in, &ctx->X[0], 16); //Bestela ez du ondo iten
ubhat 0:42863a11464a 94 aes_encrypt( in, in, &ctx->rijndael);
ubhat 0:42863a11464a 95 memcpy1(&ctx->X[0], in, 16);
ubhat 0:42863a11464a 96
ubhat 0:42863a11464a 97 data += 16;
ubhat 0:42863a11464a 98 len -= 16;
ubhat 0:42863a11464a 99 }
ubhat 0:42863a11464a 100 /* potential last block, save it */
ubhat 0:42863a11464a 101 memcpy1(ctx->M_last, data, len);
ubhat 0:42863a11464a 102 ctx->M_n = len;
ubhat 0:42863a11464a 103 }
ubhat 0:42863a11464a 104
ubhat 0:42863a11464a 105 void AES_CMAC_Final(uint8_t digest[AES_CMAC_DIGEST_LENGTH], AES_CMAC_CTX *ctx)
ubhat 0:42863a11464a 106 {
ubhat 0:42863a11464a 107 uint8_t K[16];
ubhat 0:42863a11464a 108 uint8_t in[16];
ubhat 0:42863a11464a 109 /* generate subkey K1 */
ubhat 0:42863a11464a 110 memset1(K, '\0', 16);
ubhat 0:42863a11464a 111
ubhat 0:42863a11464a 112 //rijndael_encrypt(&ctx->rijndael, K, K);
ubhat 0:42863a11464a 113
ubhat 0:42863a11464a 114 aes_encrypt( K, K, &ctx->rijndael);
ubhat 0:42863a11464a 115
ubhat 0:42863a11464a 116 if (K[0] & 0x80) {
ubhat 0:42863a11464a 117 LSHIFT(K, K);
ubhat 0:42863a11464a 118 K[15] ^= 0x87;
ubhat 0:42863a11464a 119 } else
ubhat 0:42863a11464a 120 LSHIFT(K, K);
ubhat 0:42863a11464a 121
ubhat 0:42863a11464a 122
ubhat 0:42863a11464a 123 if (ctx->M_n == 16) {
ubhat 0:42863a11464a 124 /* last block was a complete block */
ubhat 0:42863a11464a 125 XOR(K, ctx->M_last);
ubhat 0:42863a11464a 126
ubhat 0:42863a11464a 127 } else {
ubhat 0:42863a11464a 128 /* generate subkey K2 */
ubhat 0:42863a11464a 129 if (K[0] & 0x80) {
ubhat 0:42863a11464a 130 LSHIFT(K, K);
ubhat 0:42863a11464a 131 K[15] ^= 0x87;
ubhat 0:42863a11464a 132 } else
ubhat 0:42863a11464a 133 LSHIFT(K, K);
ubhat 0:42863a11464a 134
ubhat 0:42863a11464a 135 /* padding(M_last) */
ubhat 0:42863a11464a 136 ctx->M_last[ctx->M_n] = 0x80;
ubhat 0:42863a11464a 137 while (++ctx->M_n < 16)
ubhat 0:42863a11464a 138 ctx->M_last[ctx->M_n] = 0;
ubhat 0:42863a11464a 139
ubhat 0:42863a11464a 140 XOR(K, ctx->M_last);
ubhat 0:42863a11464a 141
ubhat 0:42863a11464a 142
ubhat 0:42863a11464a 143 }
ubhat 0:42863a11464a 144 XOR(ctx->M_last, ctx->X);
ubhat 0:42863a11464a 145
ubhat 0:42863a11464a 146 //rijndael_encrypt(&ctx->rijndael, ctx->X, digest);
ubhat 0:42863a11464a 147
ubhat 0:42863a11464a 148 memcpy1(in, &ctx->X[0], 16); //Bestela ez du ondo iten
ubhat 0:42863a11464a 149 aes_encrypt(in, digest, &ctx->rijndael);
ubhat 0:42863a11464a 150 memset1(K, 0, sizeof K);
ubhat 0:42863a11464a 151
ubhat 0:42863a11464a 152 }
ubhat 0:42863a11464a 153