ENEL400 / AlohaTransceiver

Basic MAC data interface for LoRa transceiver

Dependencies:   L2Frame crc

Dependents:   LoRaBaseStation LoRaTerminal

AlohaTransceiver.cpp@28:2c0e115b4f72, 2016-09-03 (annotated)

Committer:
rba90
Date:
Sat Sep 03 02:37:53 2016 +0000
Revision:
28:2c0e115b4f72
Parent:
27:463688e3bd12
Child:
29:6c59b0bba861
packet is only transmitted only if previous transmission is done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rba90 0:e2ccabf3f30c 1 #include "AlohaTransceiver.h"
rba90 0:e2ccabf3f30c 2 #include "mbed.h"
rba90 0:e2ccabf3f30c 3 #include "radio.h"
rba90 18:3e6483550f25 4 #include "debug.h"
rba90 0:e2ccabf3f30c 5 #include "AlohaFrame.h"
rba90 15:0dc9df48687a 6 #include "RingBuffer.h"
rba90 0:e2ccabf3f30c 7
rba90 28:2c0e115b4f72 8 #define ALLOW_CALLBACK_DEBUG 0
rba90 18:3e6483550f25 9
rba90 28:2c0e115b4f72 10 #define SET_FLAG(t, x) (t) |= 1 << (x)
rba90 28:2c0e115b4f72 11 #define CLEAR_FLAG(t, x) (t) &= ~(1 << (x))
rba90 28:2c0e115b4f72 12 #define TOGGLE_FLAG(t, x) (t) ^= 1 << (x)
rba90 28:2c0e115b4f72 13 #define CHECK_FLAG(t, x) (t) >> (x) & 1
rba90 27:463688e3bd12 14
rba90 0:e2ccabf3f30c 15 // declear the type of radio state
rba90 0:e2ccabf3f30c 16 typedef enum
rba90 0:e2ccabf3f30c 17 {
rba90 0:e2ccabf3f30c 18 LOWPOWER = 0,
rba90 0:e2ccabf3f30c 19 IDLE,
rba90 0:e2ccabf3f30c 20
rba90 0:e2ccabf3f30c 21 RX,
rba90 0:e2ccabf3f30c 22 RX_TIMEOUT,
rba90 0:e2ccabf3f30c 23 RX_ERROR,
rba90 0:e2ccabf3f30c 24
rba90 0:e2ccabf3f30c 25 TX,
rba90 0:e2ccabf3f30c 26 TX_TIMEOUT,
rba90 0:e2ccabf3f30c 27
rba90 0:e2ccabf3f30c 28 CAD,
rba90 0:e2ccabf3f30c 29 CAD_DONE
rba90 0:e2ccabf3f30c 30 }AppStates_t;
rba90 0:e2ccabf3f30c 31
rba90 0:e2ccabf3f30c 32 // radio driver related variables
rba90 0:e2ccabf3f30c 33 static int16_t RssiValue;
rba90 0:e2ccabf3f30c 34 static int8_t SnrValue;
rba90 0:e2ccabf3f30c 35
rba90 0:e2ccabf3f30c 36 static volatile AppStates_t State;
rba90 0:e2ccabf3f30c 37 static RadioEvents_t RadioEvents;
rba90 0:e2ccabf3f30c 38
rba90 27:463688e3bd12 39 // rx queue
rba90 27:463688e3bd12 40 CircularBuffer<AlohaFrame *> AlohaRxQueue(10);
rba90 17:c6e2e2cd6e5f 41
rba90 0:e2ccabf3f30c 42 // callback functions for radio driver
rba90 0:e2ccabf3f30c 43 void OnTxDone();
rba90 0:e2ccabf3f30c 44 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr );
rba90 0:e2ccabf3f30c 45 void OnTxTimeout();
rba90 0:e2ccabf3f30c 46 void OnRxTimeout();
rba90 0:e2ccabf3f30c 47 void OnRxError();
rba90 0:e2ccabf3f30c 48 void OnFhssChangeChannel( uint8_t channelIndex );
rba90 0:e2ccabf3f30c 49 void OnCadDone();
rba90 0:e2ccabf3f30c 50
rba90 0:e2ccabf3f30c 51 // radio driver
rba90 20:bd26d3cbc0bd 52 #ifdef DRIVER_SX1276
rba90 0:e2ccabf3f30c 53 SX1276MB1xAS Radio( NULL );
rba90 0:e2ccabf3f30c 54 #endif
rba90 0:e2ccabf3f30c 55
rba90 20:bd26d3cbc0bd 56 #ifdef DRIVER_INAIR
rba90 0:e2ccabf3f30c 57 SX1276inAir Radio( NULL );
rba90 0:e2ccabf3f30c 58 #endif
rba90 0:e2ccabf3f30c 59
rba90 0:e2ccabf3f30c 60
rba90 0:e2ccabf3f30c 61 /*
rba90 0:e2ccabf3f30c 62 * Abstract interface for accessing radio driver
rba90 0:e2ccabf3f30c 63 */
rba90 0:e2ccabf3f30c 64
rba90 27:463688e3bd12 65 AlohaTransceiver::AlohaTransceiver(uint8_t id):
rba90 27:463688e3bd12 66 AlohaTxQueue(10)
rba90 0:e2ccabf3f30c 67 {
rba90 11:3e1ff29da71a 68 // store unique device id
rba90 11:3e1ff29da71a 69 deviceId = id;
rba90 11:3e1ff29da71a 70
rba90 17:c6e2e2cd6e5f 71 // initialize sequenceid
rba90 17:c6e2e2cd6e5f 72 memset(seqid, 0x0, sizeof(seqid));
rba90 17:c6e2e2cd6e5f 73
rba90 28:2c0e115b4f72 74 // clear flags
rba90 28:2c0e115b4f72 75 flags = 0xff;
rba90 28:2c0e115b4f72 76
rba90 0:e2ccabf3f30c 77 // configure properties
rba90 0:e2ccabf3f30c 78 #if USE_MODEM_LORA == 1
rba90 0:e2ccabf3f30c 79 Settings.Power = TX_OUTPUT_POWER;
rba90 0:e2ccabf3f30c 80 Settings.Bandwidth = LORA_BANDWIDTH;
rba90 0:e2ccabf3f30c 81 Settings.Datarate = LORA_SPREADING_FACTOR;
rba90 0:e2ccabf3f30c 82 Settings.Coderate = LORA_CODINGRATE;
rba90 0:e2ccabf3f30c 83 Settings.PreambleLen = LORA_PREAMBLE_LENGTH;
rba90 0:e2ccabf3f30c 84 Settings.SymbolTimeout = LORA_SYMBOL_TIMEOUT;
rba90 0:e2ccabf3f30c 85 Settings.FixLen = LORA_FIX_LENGTH_PAYLOAD_ON;
rba90 0:e2ccabf3f30c 86 Settings.PayloadLen = 0;
rba90 0:e2ccabf3f30c 87 Settings.CrcOn = LORA_CRC_ENABLED;
rba90 0:e2ccabf3f30c 88 Settings.FreqHopOn = LORA_FHSS_ENABLED;
rba90 0:e2ccabf3f30c 89 Settings.HopPeriod = LORA_NB_SYMB_HOP;
rba90 0:e2ccabf3f30c 90 Settings.IqInverted = LORA_IQ_INVERSION_ON;
rba90 0:e2ccabf3f30c 91 Settings.RxContinuous = true;
rba90 0:e2ccabf3f30c 92 Settings.TxTimeout = TX_TIMEOUT_VALUE;
rba90 0:e2ccabf3f30c 93
rba90 0:e2ccabf3f30c 94 #elif USE_MODEM_FSK == 1
rba90 0:e2ccabf3f30c 95 // TODO: Complete settings for FSK mode
rba90 0:e2ccabf3f30c 96 #error "FSK not implemented"
rba90 0:e2ccabf3f30c 97 #else
rba90 0:e2ccabf3f30c 98 #error "Please define a modem in the compiler options."
rba90 0:e2ccabf3f30c 99 #endif
rba90 0:e2ccabf3f30c 100 }
rba90 0:e2ccabf3f30c 101
rba90 0:e2ccabf3f30c 102 AlohaTransceiver::~AlohaTransceiver()
rba90 0:e2ccabf3f30c 103 {
rba90 0:e2ccabf3f30c 104
rba90 0:e2ccabf3f30c 105 }
rba90 0:e2ccabf3f30c 106
rba90 6:f545f5aa7de3 107 void AlohaTransceiver::boardInit()
rba90 0:e2ccabf3f30c 108 {
rba90 0:e2ccabf3f30c 109 // configure callback functions
rba90 0:e2ccabf3f30c 110 RadioEvents.TxDone = OnTxDone;
rba90 0:e2ccabf3f30c 111 RadioEvents.RxDone = OnRxDone;
rba90 0:e2ccabf3f30c 112 RadioEvents.RxError = OnRxError;
rba90 0:e2ccabf3f30c 113 RadioEvents.TxTimeout = OnTxTimeout;
rba90 0:e2ccabf3f30c 114 RadioEvents.RxTimeout = OnRxTimeout;
rba90 0:e2ccabf3f30c 115 Radio.Init( &RadioEvents );
rba90 0:e2ccabf3f30c 116
rba90 0:e2ccabf3f30c 117 // verify the connection with the board
rba90 0:e2ccabf3f30c 118 while( Radio.Read( REG_VERSION ) == 0x00 )
rba90 0:e2ccabf3f30c 119 {
rba90 18:3e6483550f25 120 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 121 debug( "Radio could not be detected!\n\r" );
rba90 18:3e6483550f25 122 #endif
rba90 0:e2ccabf3f30c 123 wait( 1 );
rba90 0:e2ccabf3f30c 124 }
rba90 18:3e6483550f25 125 #ifdef DEBUG_ALOHA
rba90 0:e2ccabf3f30c 126 printf("RadioRegVersion: %d\r\n", Radio.Read( REG_VERSION ));
rba90 18:3e6483550f25 127 #endif
rba90 0:e2ccabf3f30c 128 }
rba90 0:e2ccabf3f30c 129
rba90 0:e2ccabf3f30c 130 void AlohaTransceiver::updateSettings()
rba90 0:e2ccabf3f30c 131 {
rba90 6:f545f5aa7de3 132 Radio.SetChannel( RF_FREQUENCY );
rba90 0:e2ccabf3f30c 133 #if USE_MODEM_LORA == 1
rba90 0:e2ccabf3f30c 134
rba90 0:e2ccabf3f30c 135 Radio.SetTxConfig( MODEM_LORA, Settings.Power, 0, Settings.Bandwidth,
rba90 0:e2ccabf3f30c 136 Settings.Datarate, Settings.Coderate,
rba90 0:e2ccabf3f30c 137 Settings.PreambleLen, Settings.FixLen,
rba90 0:e2ccabf3f30c 138 Settings.CrcOn, Settings.FreqHopOn, Settings.HopPeriod,
rba90 0:e2ccabf3f30c 139 Settings.IqInverted, Settings.TxTimeout );
rba90 0:e2ccabf3f30c 140
rba90 0:e2ccabf3f30c 141 Radio.SetRxConfig( MODEM_LORA, Settings.Bandwidth, Settings.Datarate,
rba90 0:e2ccabf3f30c 142 Settings.Coderate, 0, Settings.PreambleLen,
rba90 0:e2ccabf3f30c 143 Settings.SymbolTimeout, Settings.FixLen, Settings.PayloadLen,
rba90 0:e2ccabf3f30c 144 Settings.CrcOn, Settings.FreqHopOn, Settings.HopPeriod,
rba90 0:e2ccabf3f30c 145 Settings.IqInverted, Settings.RxContinuous );
rba90 0:e2ccabf3f30c 146
rba90 0:e2ccabf3f30c 147 #elif USE_MODEM_FSK == 1
rba90 0:e2ccabf3f30c 148 #error "FSK not implemented"
rba90 0:e2ccabf3f30c 149 #else
rba90 0:e2ccabf3f30c 150 #error "Please define a modem in the compiler options."
rba90 0:e2ccabf3f30c 151 #endif
rba90 0:e2ccabf3f30c 152 }
rba90 0:e2ccabf3f30c 153
rba90 6:f545f5aa7de3 154 void AlohaTransceiver::enable()
rba90 6:f545f5aa7de3 155 {
rba90 6:f545f5aa7de3 156 // entering passive receiver mode
rba90 10:065a4b58c6ff 157 Radio.Rx( 0 );
rba90 6:f545f5aa7de3 158 }
rba90 6:f545f5aa7de3 159
rba90 0:e2ccabf3f30c 160 void AlohaTransceiver::poll()
rba90 0:e2ccabf3f30c 161 {
rba90 0:e2ccabf3f30c 162 switch( State )
rba90 0:e2ccabf3f30c 163 {
rba90 0:e2ccabf3f30c 164 case RX:
rba90 5:c3741633dc6f 165 {
rba90 27:463688e3bd12 166 // process packet if received
rba90 27:463688e3bd12 167 while (AlohaRxQueue.getCounter() > 0)
rba90 25:bcd1cee4e5a8 168 {
rba90 27:463688e3bd12 169 // pop from queue
rba90 27:463688e3bd12 170 AlohaFrame *frame = AlohaRxQueue.dequeue();
rba90 27:463688e3bd12 171
rba90 27:463688e3bd12 172 // check destination
rba90 27:463688e3bd12 173 // if the destination is the device id, then processing, otherwise drop the packet and continue
rba90 27:463688e3bd12 174 // listening
rba90 27:463688e3bd12 175 if (frame->getDestinationAddress() == (deviceId & 0x0f))
rba90 26:e87c8d345644 176 {
rba90 27:463688e3bd12 177 uint8_t type = frame->getType();
rba90 27:463688e3bd12 178
rba90 27:463688e3bd12 179 // schedule the ack frame immediatly after the data frame is received
rba90 27:463688e3bd12 180 if (type == AlohaFrame::Aloha_Data)
rba90 27:463688e3bd12 181 {
rba90 27:463688e3bd12 182 sendAck(frame);
rba90 27:463688e3bd12 183 }
rba90 27:463688e3bd12 184 else if (type == AlohaFrame::Aloha_ACK)
rba90 27:463688e3bd12 185 {
rba90 26:e87c8d345644 186 #ifdef DEBUG_ALOHA
rba90 27:463688e3bd12 187 printf("RXACK::SEQID:0x%x\r\n", frame->getSequenceID());
rba90 26:e87c8d345644 188 #endif
rba90 27:463688e3bd12 189 }
rba90 27:463688e3bd12 190
rba90 27:463688e3bd12 191 // check registered callback function
rba90 27:463688e3bd12 192 // execute callback functions if registered
rba90 27:463688e3bd12 193 if (AlohaTypeCallbackTable[type] != NULL)
rba90 27:463688e3bd12 194 {
rba90 27:463688e3bd12 195 uint8_t payload_length = frame->getPayloadLength();
rba90 27:463688e3bd12 196 uint8_t payload[payload_length];
rba90 27:463688e3bd12 197 uint8_t src_addr = frame->getSourceAddress();
rba90 27:463688e3bd12 198
rba90 27:463688e3bd12 199 // extract payload
rba90 27:463688e3bd12 200 for (uint8_t i = 0; i < payload_length; i++)
rba90 27:463688e3bd12 201 {
rba90 27:463688e3bd12 202 payload[i] = frame->getPayload(i);
rba90 27:463688e3bd12 203 }
rba90 27:463688e3bd12 204
rba90 27:463688e3bd12 205 // execute callback function
rba90 27:463688e3bd12 206 AlohaTypeCallbackTable[type](payload, payload_length, src_addr);
rba90 27:463688e3bd12 207 }
rba90 26:e87c8d345644 208 }
rba90 17:c6e2e2cd6e5f 209
rba90 27:463688e3bd12 210 // free memory
rba90 27:463688e3bd12 211 delete frame;
rba90 0:e2ccabf3f30c 212 }
rba90 0:e2ccabf3f30c 213
rba90 10:065a4b58c6ff 214 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 215 State = LOWPOWER;
rba90 0:e2ccabf3f30c 216 break;
rba90 0:e2ccabf3f30c 217 }
rba90 0:e2ccabf3f30c 218 case TX:
rba90 0:e2ccabf3f30c 219 {
rba90 28:2c0e115b4f72 220 // set tx to done, allow next transmission
rba90 28:2c0e115b4f72 221 setTxDoneFlag();
rba90 28:2c0e115b4f72 222
rba90 10:065a4b58c6ff 223 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 224 State = LOWPOWER;
rba90 0:e2ccabf3f30c 225 break;
rba90 0:e2ccabf3f30c 226 }
rba90 0:e2ccabf3f30c 227 case RX_TIMEOUT:
rba90 0:e2ccabf3f30c 228 {
rba90 10:065a4b58c6ff 229 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 230 State = LOWPOWER;
rba90 0:e2ccabf3f30c 231 break;
rba90 0:e2ccabf3f30c 232 }
rba90 0:e2ccabf3f30c 233 case RX_ERROR:
rba90 0:e2ccabf3f30c 234 {
rba90 10:065a4b58c6ff 235 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 236 State = LOWPOWER;
rba90 0:e2ccabf3f30c 237 break;
rba90 0:e2ccabf3f30c 238 }
rba90 0:e2ccabf3f30c 239 case TX_TIMEOUT:
rba90 0:e2ccabf3f30c 240 {
rba90 10:065a4b58c6ff 241 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 242 State = LOWPOWER;
rba90 0:e2ccabf3f30c 243 break;
rba90 0:e2ccabf3f30c 244 }
rba90 0:e2ccabf3f30c 245 case LOWPOWER:
rba90 0:e2ccabf3f30c 246 {
rba90 22:2e39f382f782 247 // transmit packet when the radio is free
rba90 28:2c0e115b4f72 248 if (getTxDoneFlag() && AlohaTxQueue.getCounter() > 0)
rba90 22:2e39f382f782 249 {
rba90 22:2e39f382f782 250 AlohaFrame *frame = AlohaTxQueue.dequeue();
rba90 22:2e39f382f782 251
rba90 22:2e39f382f782 252 // create a buffer for transmit
rba90 22:2e39f382f782 253 uint8_t frame_length = frame->getPayloadLength() + FIXED_BYTE;
rba90 22:2e39f382f782 254 uint8_t buffer[frame_length]; // 4 fix fields
rba90 22:2e39f382f782 255 memset(buffer, 0x0, sizeof(buffer));
rba90 22:2e39f382f782 256
rba90 22:2e39f382f782 257 // copy content to buffer
rba90 22:2e39f382f782 258 frame->serialize(buffer);
rba90 22:2e39f382f782 259
rba90 22:2e39f382f782 260 // send to radio
rba90 22:2e39f382f782 261 Radio.Send(buffer, frame_length);
rba90 22:2e39f382f782 262
rba90 28:2c0e115b4f72 263 // block the next transmission until previous transmission is done
rba90 28:2c0e115b4f72 264 clearTxDoneFlag();
rba90 28:2c0e115b4f72 265
rba90 22:2e39f382f782 266 // free memory
rba90 22:2e39f382f782 267 delete frame;
rba90 22:2e39f382f782 268 }
rba90 0:e2ccabf3f30c 269 break;
rba90 0:e2ccabf3f30c 270 }
rba90 0:e2ccabf3f30c 271 default:
rba90 0:e2ccabf3f30c 272 {
rba90 0:e2ccabf3f30c 273 State = LOWPOWER;
rba90 0:e2ccabf3f30c 274 break;
rba90 0:e2ccabf3f30c 275 }
rba90 0:e2ccabf3f30c 276 }
rba90 0:e2ccabf3f30c 277 }
rba90 0:e2ccabf3f30c 278
rba90 24:8f31c33c7675 279 bool AlohaTransceiver::send(BasicPacket *packet)
rba90 24:8f31c33c7675 280 {
rba90 24:8f31c33c7675 281 // for the reason that we only transmit basic packet format, the
rba90 24:8f31c33c7675 282 // length is always 8
rba90 24:8f31c33c7675 283 uint8_t payload_length = 8;
rba90 24:8f31c33c7675 284
rba90 24:8f31c33c7675 285 // get destination address
rba90 24:8f31c33c7675 286 uint8_t destination_address = findNextHop(packet->getDestinationID());
rba90 24:8f31c33c7675 287
rba90 24:8f31c33c7675 288 // serialize the packet from upper layer
rba90 24:8f31c33c7675 289 uint8_t buffer[payload_length];
rba90 24:8f31c33c7675 290 memset(buffer, 0x0, sizeof(buffer));
rba90 24:8f31c33c7675 291
rba90 24:8f31c33c7675 292 // copy bytes into buffer
rba90 24:8f31c33c7675 293 packet->serialize(buffer);
rba90 17:c6e2e2cd6e5f 294
rba90 17:c6e2e2cd6e5f 295 // create a new frame
rba90 22:2e39f382f782 296 AlohaFrame *frame = new AlohaFrame();
rba90 17:c6e2e2cd6e5f 297
rba90 22:2e39f382f782 298 // set properfies
rba90 24:8f31c33c7675 299 // set payload as data
rba90 22:2e39f382f782 300 frame->setType(AlohaFrame::Aloha_Data);
rba90 24:8f31c33c7675 301
rba90 24:8f31c33c7675 302 // set payload length (8 bytes for BasicPacket)
rba90 22:2e39f382f782 303 frame->setPayloadLength(payload_length);
rba90 24:8f31c33c7675 304
rba90 24:8f31c33c7675 305 // set mac layer device id
rba90 22:2e39f382f782 306 frame->setSourceAddress(deviceId);
rba90 24:8f31c33c7675 307
rba90 24:8f31c33c7675 308 // set mac layer destination id
rba90 24:8f31c33c7675 309 // for multiple hop system, the destination is the next hop
rba90 24:8f31c33c7675 310 // in this case, we use destination id from upper layer
rba90 24:8f31c33c7675 311 frame->setDestinationAddress(packet->getDestinationID());
rba90 24:8f31c33c7675 312
rba90 24:8f31c33c7675 313 // set full message flag (always true in this case)
rba90 22:2e39f382f782 314 frame->setFullMessageFlag(0x1);
rba90 22:2e39f382f782 315
rba90 24:8f31c33c7675 316 // use dest_addr as key for accessing sequence id
rba90 24:8f31c33c7675 317 // the seqid should increase as it successfully transmit the packet
rba90 24:8f31c33c7675 318 frame->setSequenceID(seqid[destination_address]++);
rba90 24:8f31c33c7675 319
rba90 22:2e39f382f782 320 // set payload
rba90 17:c6e2e2cd6e5f 321 for (uint8_t i = 0; i < payload_length; i++)
rba90 17:c6e2e2cd6e5f 322 {
rba90 24:8f31c33c7675 323 frame->setPayload(i, buffer[i]);
rba90 17:c6e2e2cd6e5f 324 }
rba90 17:c6e2e2cd6e5f 325
rba90 17:c6e2e2cd6e5f 326 // calculate crc
rba90 22:2e39f382f782 327 frame->generateCrc();
rba90 17:c6e2e2cd6e5f 328
rba90 22:2e39f382f782 329 // push frame to the back of queue
rba90 22:2e39f382f782 330 AlohaTxQueue.enqueue(frame);
rba90 27:463688e3bd12 331
rba90 27:463688e3bd12 332 // debug
rba90 27:463688e3bd12 333 #ifdef DEBUG_ALOHA
rba90 27:463688e3bd12 334 printf("\r\nTXDATA::ADDR:0x%x, SEQID:0x%x\r\n", frame->getDestinationAddress(), frame->getSequenceID());
rba90 27:463688e3bd12 335 #endif
rba90 17:c6e2e2cd6e5f 336 return true;
rba90 0:e2ccabf3f30c 337 }
rba90 0:e2ccabf3f30c 338
rba90 25:bcd1cee4e5a8 339 void AlohaTransceiver::sendAck(AlohaFrame *inFrame)
rba90 25:bcd1cee4e5a8 340 {
rba90 25:bcd1cee4e5a8 341 // create a new frame by calling it's constructor
rba90 25:bcd1cee4e5a8 342 AlohaFrame *outFrame = new AlohaFrame();
rba90 25:bcd1cee4e5a8 343
rba90 25:bcd1cee4e5a8 344 // set frame type
rba90 25:bcd1cee4e5a8 345 outFrame->setType(AlohaFrame::Aloha_ACK);
rba90 25:bcd1cee4e5a8 346
rba90 25:bcd1cee4e5a8 347 // set payload length (0 byte payload for ack frame)
rba90 25:bcd1cee4e5a8 348 outFrame->setPayloadLength(0);
rba90 25:bcd1cee4e5a8 349
rba90 25:bcd1cee4e5a8 350 // set mac layer device id
rba90 25:bcd1cee4e5a8 351 outFrame->setSourceAddress(deviceId);
rba90 25:bcd1cee4e5a8 352
rba90 25:bcd1cee4e5a8 353 // set mac layer destination id
rba90 25:bcd1cee4e5a8 354 outFrame->setDestinationAddress(inFrame->getSourceAddress());
rba90 25:bcd1cee4e5a8 355
rba90 25:bcd1cee4e5a8 356 // set full message flag
rba90 25:bcd1cee4e5a8 357 outFrame->setFullMessageFlag(0x1);
rba90 25:bcd1cee4e5a8 358
rba90 25:bcd1cee4e5a8 359 // set seqid
rba90 25:bcd1cee4e5a8 360 // the sequence id is always the source id + 1
rba90 25:bcd1cee4e5a8 361 outFrame->setSequenceID(inFrame->getSequenceID() + 1);
rba90 25:bcd1cee4e5a8 362
rba90 25:bcd1cee4e5a8 363 // no payload
rba90 25:bcd1cee4e5a8 364
rba90 25:bcd1cee4e5a8 365 // generate cec
rba90 25:bcd1cee4e5a8 366 outFrame->generateCrc();
rba90 25:bcd1cee4e5a8 367
rba90 25:bcd1cee4e5a8 368 // push frame to the back of queue
rba90 25:bcd1cee4e5a8 369 AlohaTxQueue.enqueue(outFrame);
rba90 25:bcd1cee4e5a8 370
rba90 25:bcd1cee4e5a8 371 // debug
rba90 25:bcd1cee4e5a8 372 #ifdef DEBUG_ALOHA
rba90 25:bcd1cee4e5a8 373 printf("\r\nTXACK::ADDR:0x%x, SEQID:0x%x\r\n", outFrame->getDestinationAddress(), outFrame->getSequenceID());
rba90 25:bcd1cee4e5a8 374 #endif
rba90 25:bcd1cee4e5a8 375 }
rba90 25:bcd1cee4e5a8 376
rba90 28:2c0e115b4f72 377 bool AlohaTransceiver::getTxDoneFlag()
rba90 28:2c0e115b4f72 378 {
rba90 28:2c0e115b4f72 379 return CHECK_FLAG(flags, 0);
rba90 28:2c0e115b4f72 380 }
rba90 28:2c0e115b4f72 381
rba90 28:2c0e115b4f72 382 void AlohaTransceiver::setTxDoneFlag()
rba90 28:2c0e115b4f72 383 {
rba90 28:2c0e115b4f72 384 SET_FLAG(flags, 0);
rba90 28:2c0e115b4f72 385 }
rba90 28:2c0e115b4f72 386
rba90 28:2c0e115b4f72 387 void AlohaTransceiver::clearTxDoneFlag()
rba90 28:2c0e115b4f72 388 {
rba90 28:2c0e115b4f72 389 CLEAR_FLAG(flags, 0);
rba90 28:2c0e115b4f72 390 }
rba90 28:2c0e115b4f72 391
rba90 0:e2ccabf3f30c 392 void AlohaTransceiver::registerType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 393 {
rba90 0:e2ccabf3f30c 394 AlohaTypeCallbackTable[type] = f;
rba90 0:e2ccabf3f30c 395 }
rba90 0:e2ccabf3f30c 396
rba90 0:e2ccabf3f30c 397 void AlohaTransceiver::deRegisterType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 398 {
rba90 0:e2ccabf3f30c 399 AlohaTypeCallbackTable[type] = NULL;
rba90 0:e2ccabf3f30c 400 }
rba90 0:e2ccabf3f30c 401
rba90 2:fa264e48d5f7 402 int16_t AlohaTransceiver::getRssi()
rba90 2:fa264e48d5f7 403 {
rba90 2:fa264e48d5f7 404 return RssiValue;
rba90 2:fa264e48d5f7 405 }
rba90 2:fa264e48d5f7 406
rba90 2:fa264e48d5f7 407 int8_t AlohaTransceiver::getSnr()
rba90 2:fa264e48d5f7 408 {
rba90 2:fa264e48d5f7 409 return SnrValue;
rba90 2:fa264e48d5f7 410 }
rba90 2:fa264e48d5f7 411
rba90 17:c6e2e2cd6e5f 412 uint8_t AlohaTransceiver::getDeviceID()
rba90 11:3e1ff29da71a 413 {
rba90 11:3e1ff29da71a 414 return deviceId;
rba90 11:3e1ff29da71a 415 }
rba90 11:3e1ff29da71a 416
rba90 17:c6e2e2cd6e5f 417 void AlohaTransceiver::setDeviceID(uint8_t id)
rba90 11:3e1ff29da71a 418 {
rba90 11:3e1ff29da71a 419 deviceId = id;
rba90 11:3e1ff29da71a 420 }
rba90 11:3e1ff29da71a 421
rba90 24:8f31c33c7675 422 uint8_t AlohaTransceiver::findNextHop(uint8_t addr)
rba90 24:8f31c33c7675 423 {
rba90 24:8f31c33c7675 424 // TODO: maintain a routing lookup table for choosing shortest path
rba90 24:8f31c33c7675 425 return addr;
rba90 24:8f31c33c7675 426 }
rba90 24:8f31c33c7675 427
rba90 8:4bda842f73d4 428 #if USE_MODEM_LORA == 1
rba90 8:4bda842f73d4 429 AlohaTransceiver::LoRaSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 430 {
rba90 8:4bda842f73d4 431 return &Settings;
rba90 8:4bda842f73d4 432 }
rba90 8:4bda842f73d4 433
rba90 8:4bda842f73d4 434 #elif USE_MODEM_FSK == 1
rba90 8:4bda842f73d4 435 AlohaTransceiver::FskSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 436 {
rba90 8:4bda842f73d4 437 return &Settings;
rba90 8:4bda842f73d4 438 }
rba90 8:4bda842f73d4 439 #else
rba90 8:4bda842f73d4 440 #error "Please define a modem in the compiler options."
rba90 8:4bda842f73d4 441 #endif
rba90 8:4bda842f73d4 442
rba90 0:e2ccabf3f30c 443 void OnTxDone( void )
rba90 0:e2ccabf3f30c 444 {
rba90 0:e2ccabf3f30c 445 Radio.Sleep( );
rba90 0:e2ccabf3f30c 446 State = TX;
rba90 18:3e6483550f25 447
rba90 18:3e6483550f25 448 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 449 debug_if(ALLOW_CALLBACK_DEBUG, "> OnTxDone\n\r" );
rba90 18:3e6483550f25 450 #endif
rba90 0:e2ccabf3f30c 451 }
rba90 0:e2ccabf3f30c 452
rba90 0:e2ccabf3f30c 453 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
rba90 0:e2ccabf3f30c 454 {
rba90 27:463688e3bd12 455 uint8_t payload_length;
rba90 27:463688e3bd12 456
rba90 0:e2ccabf3f30c 457 Radio.Sleep( );
rba90 0:e2ccabf3f30c 458
rba90 0:e2ccabf3f30c 459 // safeguard: if size exceeded maximum buffer size, it will cause memory overflow
rba90 27:463688e3bd12 460 payload_length = size ? BUFFER_SIZE : size <= BUFFER_SIZE;
rba90 27:463688e3bd12 461
rba90 27:463688e3bd12 462 // create a new frame instance
rba90 27:463688e3bd12 463 AlohaFrame *frame = new AlohaFrame(payload, payload_length);
rba90 27:463688e3bd12 464
rba90 27:463688e3bd12 465 // push onto the end of queue
rba90 27:463688e3bd12 466 AlohaRxQueue.enqueue(frame);
rba90 0:e2ccabf3f30c 467
rba90 0:e2ccabf3f30c 468 RssiValue = rssi;
rba90 0:e2ccabf3f30c 469 SnrValue = snr;
rba90 0:e2ccabf3f30c 470 State = RX;
rba90 18:3e6483550f25 471
rba90 18:3e6483550f25 472 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 473 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxDone\n\r" );
rba90 18:3e6483550f25 474 #endif
rba90 0:e2ccabf3f30c 475 }
rba90 0:e2ccabf3f30c 476
rba90 0:e2ccabf3f30c 477 void OnTxTimeout( void )
rba90 0:e2ccabf3f30c 478 {
rba90 0:e2ccabf3f30c 479 Radio.Sleep( );
rba90 0:e2ccabf3f30c 480 State = TX_TIMEOUT;
rba90 18:3e6483550f25 481
rba90 18:3e6483550f25 482 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 483 debug_if(ALLOW_CALLBACK_DEBUG, "> OnTxTimeout\n\r" );
rba90 18:3e6483550f25 484 #endif
rba90 0:e2ccabf3f30c 485 }
rba90 0:e2ccabf3f30c 486
rba90 0:e2ccabf3f30c 487 void OnRxTimeout( void )
rba90 0:e2ccabf3f30c 488 {
rba90 0:e2ccabf3f30c 489 Radio.Sleep( );
rba90 0:e2ccabf3f30c 490 State = RX_TIMEOUT;
rba90 18:3e6483550f25 491
rba90 18:3e6483550f25 492 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 493 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxTimeout\n\r" );
rba90 18:3e6483550f25 494 #endif
rba90 0:e2ccabf3f30c 495 }
rba90 0:e2ccabf3f30c 496
rba90 0:e2ccabf3f30c 497 void OnRxError( void )
rba90 0:e2ccabf3f30c 498 {
rba90 0:e2ccabf3f30c 499 Radio.Sleep( );
rba90 0:e2ccabf3f30c 500 State = RX_ERROR;
rba90 18:3e6483550f25 501
rba90 18:3e6483550f25 502 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 503 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxError\n\r" );
rba90 18:3e6483550f25 504 #endif
rba90 0:e2ccabf3f30c 505 }
rba90 24:8f31c33c7675 506