ENEL400 / AlohaTransceiver

Basic MAC data interface for LoRa transceiver

Dependencies:   L2Frame crc

Dependents:   LoRaBaseStation LoRaTerminal

AlohaTransceiver.cpp@25:bcd1cee4e5a8, 2016-09-03 (annotated)

Committer:
rba90
Date:
Sat Sep 03 01:03:30 2016 +0000
Revision:
25:bcd1cee4e5a8
Parent:
24:8f31c33c7675
Child:
26:e87c8d345644
add ack system into alohatransceiver

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 18:3e6483550f25 8
rba90 0:e2ccabf3f30c 9 // declear the type of radio state
rba90 0:e2ccabf3f30c 10 typedef enum
rba90 0:e2ccabf3f30c 11 {
rba90 0:e2ccabf3f30c 12 LOWPOWER = 0,
rba90 0:e2ccabf3f30c 13 IDLE,
rba90 0:e2ccabf3f30c 14
rba90 0:e2ccabf3f30c 15 RX,
rba90 0:e2ccabf3f30c 16 RX_TIMEOUT,
rba90 0:e2ccabf3f30c 17 RX_ERROR,
rba90 0:e2ccabf3f30c 18
rba90 0:e2ccabf3f30c 19 TX,
rba90 0:e2ccabf3f30c 20 TX_TIMEOUT,
rba90 0:e2ccabf3f30c 21
rba90 0:e2ccabf3f30c 22 CAD,
rba90 0:e2ccabf3f30c 23 CAD_DONE
rba90 0:e2ccabf3f30c 24 }AppStates_t;
rba90 0:e2ccabf3f30c 25
rba90 0:e2ccabf3f30c 26 // radio driver related variables
rba90 0:e2ccabf3f30c 27 static uint16_t BufferSize;
rba90 0:e2ccabf3f30c 28 static uint8_t Buffer[BUFFER_SIZE];
rba90 0:e2ccabf3f30c 29
rba90 0:e2ccabf3f30c 30 static int16_t RssiValue;
rba90 0:e2ccabf3f30c 31 static int8_t SnrValue;
rba90 0:e2ccabf3f30c 32
rba90 0:e2ccabf3f30c 33 static volatile AppStates_t State;
rba90 0:e2ccabf3f30c 34 static RadioEvents_t RadioEvents;
rba90 0:e2ccabf3f30c 35
rba90 17:c6e2e2cd6e5f 36
rba90 17:c6e2e2cd6e5f 37
rba90 0:e2ccabf3f30c 38 // callback functions for radio driver
rba90 0:e2ccabf3f30c 39 void OnTxDone();
rba90 0:e2ccabf3f30c 40 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr );
rba90 0:e2ccabf3f30c 41 void OnTxTimeout();
rba90 0:e2ccabf3f30c 42 void OnRxTimeout();
rba90 0:e2ccabf3f30c 43 void OnRxError();
rba90 0:e2ccabf3f30c 44 void OnFhssChangeChannel( uint8_t channelIndex );
rba90 0:e2ccabf3f30c 45 void OnCadDone();
rba90 0:e2ccabf3f30c 46
rba90 0:e2ccabf3f30c 47 // radio driver
rba90 20:bd26d3cbc0bd 48 #ifdef DRIVER_SX1276
rba90 0:e2ccabf3f30c 49 SX1276MB1xAS Radio( NULL );
rba90 0:e2ccabf3f30c 50 #endif
rba90 0:e2ccabf3f30c 51
rba90 20:bd26d3cbc0bd 52 #ifdef DRIVER_INAIR
rba90 0:e2ccabf3f30c 53 SX1276inAir Radio( NULL );
rba90 0:e2ccabf3f30c 54 #endif
rba90 0:e2ccabf3f30c 55
rba90 0:e2ccabf3f30c 56
rba90 0:e2ccabf3f30c 57 /*
rba90 0:e2ccabf3f30c 58 * Abstract interface for accessing radio driver
rba90 0:e2ccabf3f30c 59 */
rba90 0:e2ccabf3f30c 60
rba90 11:3e1ff29da71a 61 AlohaTransceiver::AlohaTransceiver(uint8_t id)
rba90 0:e2ccabf3f30c 62 {
rba90 11:3e1ff29da71a 63 // store unique device id
rba90 11:3e1ff29da71a 64 deviceId = id;
rba90 11:3e1ff29da71a 65
rba90 17:c6e2e2cd6e5f 66 // initialize sequenceid
rba90 17:c6e2e2cd6e5f 67 memset(seqid, 0x0, sizeof(seqid));
rba90 17:c6e2e2cd6e5f 68
rba90 0:e2ccabf3f30c 69 // configure properties
rba90 0:e2ccabf3f30c 70 #if USE_MODEM_LORA == 1
rba90 0:e2ccabf3f30c 71 Settings.Power = TX_OUTPUT_POWER;
rba90 0:e2ccabf3f30c 72 Settings.Bandwidth = LORA_BANDWIDTH;
rba90 0:e2ccabf3f30c 73 Settings.Datarate = LORA_SPREADING_FACTOR;
rba90 0:e2ccabf3f30c 74 Settings.Coderate = LORA_CODINGRATE;
rba90 0:e2ccabf3f30c 75 Settings.PreambleLen = LORA_PREAMBLE_LENGTH;
rba90 0:e2ccabf3f30c 76 Settings.SymbolTimeout = LORA_SYMBOL_TIMEOUT;
rba90 0:e2ccabf3f30c 77 Settings.FixLen = LORA_FIX_LENGTH_PAYLOAD_ON;
rba90 0:e2ccabf3f30c 78 Settings.PayloadLen = 0;
rba90 0:e2ccabf3f30c 79 Settings.CrcOn = LORA_CRC_ENABLED;
rba90 0:e2ccabf3f30c 80 Settings.FreqHopOn = LORA_FHSS_ENABLED;
rba90 0:e2ccabf3f30c 81 Settings.HopPeriod = LORA_NB_SYMB_HOP;
rba90 0:e2ccabf3f30c 82 Settings.IqInverted = LORA_IQ_INVERSION_ON;
rba90 0:e2ccabf3f30c 83 Settings.RxContinuous = true;
rba90 0:e2ccabf3f30c 84 Settings.TxTimeout = TX_TIMEOUT_VALUE;
rba90 0:e2ccabf3f30c 85
rba90 0:e2ccabf3f30c 86 #elif USE_MODEM_FSK == 1
rba90 0:e2ccabf3f30c 87 // TODO: Complete settings for FSK mode
rba90 0:e2ccabf3f30c 88 #error "FSK not implemented"
rba90 0:e2ccabf3f30c 89 #else
rba90 0:e2ccabf3f30c 90 #error "Please define a modem in the compiler options."
rba90 0:e2ccabf3f30c 91 #endif
rba90 0:e2ccabf3f30c 92 }
rba90 0:e2ccabf3f30c 93
rba90 0:e2ccabf3f30c 94 AlohaTransceiver::~AlohaTransceiver()
rba90 0:e2ccabf3f30c 95 {
rba90 0:e2ccabf3f30c 96
rba90 0:e2ccabf3f30c 97 }
rba90 0:e2ccabf3f30c 98
rba90 6:f545f5aa7de3 99 void AlohaTransceiver::boardInit()
rba90 0:e2ccabf3f30c 100 {
rba90 0:e2ccabf3f30c 101 // configure callback functions
rba90 0:e2ccabf3f30c 102 RadioEvents.TxDone = OnTxDone;
rba90 0:e2ccabf3f30c 103 RadioEvents.RxDone = OnRxDone;
rba90 0:e2ccabf3f30c 104 RadioEvents.RxError = OnRxError;
rba90 0:e2ccabf3f30c 105 RadioEvents.TxTimeout = OnTxTimeout;
rba90 0:e2ccabf3f30c 106 RadioEvents.RxTimeout = OnRxTimeout;
rba90 0:e2ccabf3f30c 107 Radio.Init( &RadioEvents );
rba90 0:e2ccabf3f30c 108
rba90 0:e2ccabf3f30c 109 // verify the connection with the board
rba90 0:e2ccabf3f30c 110 while( Radio.Read( REG_VERSION ) == 0x00 )
rba90 0:e2ccabf3f30c 111 {
rba90 18:3e6483550f25 112 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 113 debug( "Radio could not be detected!\n\r" );
rba90 18:3e6483550f25 114 #endif
rba90 0:e2ccabf3f30c 115 wait( 1 );
rba90 0:e2ccabf3f30c 116 }
rba90 18:3e6483550f25 117 #ifdef DEBUG_ALOHA
rba90 0:e2ccabf3f30c 118 printf("RadioRegVersion: %d\r\n", Radio.Read( REG_VERSION ));
rba90 18:3e6483550f25 119 #endif
rba90 0:e2ccabf3f30c 120 }
rba90 0:e2ccabf3f30c 121
rba90 0:e2ccabf3f30c 122 void AlohaTransceiver::updateSettings()
rba90 0:e2ccabf3f30c 123 {
rba90 6:f545f5aa7de3 124 Radio.SetChannel( RF_FREQUENCY );
rba90 0:e2ccabf3f30c 125 #if USE_MODEM_LORA == 1
rba90 0:e2ccabf3f30c 126
rba90 0:e2ccabf3f30c 127 Radio.SetTxConfig( MODEM_LORA, Settings.Power, 0, Settings.Bandwidth,
rba90 0:e2ccabf3f30c 128 Settings.Datarate, Settings.Coderate,
rba90 0:e2ccabf3f30c 129 Settings.PreambleLen, Settings.FixLen,
rba90 0:e2ccabf3f30c 130 Settings.CrcOn, Settings.FreqHopOn, Settings.HopPeriod,
rba90 0:e2ccabf3f30c 131 Settings.IqInverted, Settings.TxTimeout );
rba90 0:e2ccabf3f30c 132
rba90 0:e2ccabf3f30c 133 Radio.SetRxConfig( MODEM_LORA, Settings.Bandwidth, Settings.Datarate,
rba90 0:e2ccabf3f30c 134 Settings.Coderate, 0, Settings.PreambleLen,
rba90 0:e2ccabf3f30c 135 Settings.SymbolTimeout, Settings.FixLen, Settings.PayloadLen,
rba90 0:e2ccabf3f30c 136 Settings.CrcOn, Settings.FreqHopOn, Settings.HopPeriod,
rba90 0:e2ccabf3f30c 137 Settings.IqInverted, Settings.RxContinuous );
rba90 0:e2ccabf3f30c 138
rba90 0:e2ccabf3f30c 139 #elif USE_MODEM_FSK == 1
rba90 0:e2ccabf3f30c 140 #error "FSK not implemented"
rba90 0:e2ccabf3f30c 141 #else
rba90 0:e2ccabf3f30c 142 #error "Please define a modem in the compiler options."
rba90 0:e2ccabf3f30c 143 #endif
rba90 0:e2ccabf3f30c 144 }
rba90 0:e2ccabf3f30c 145
rba90 6:f545f5aa7de3 146 void AlohaTransceiver::enable()
rba90 6:f545f5aa7de3 147 {
rba90 6:f545f5aa7de3 148 // entering passive receiver mode
rba90 10:065a4b58c6ff 149 Radio.Rx( 0 );
rba90 6:f545f5aa7de3 150 }
rba90 6:f545f5aa7de3 151
rba90 0:e2ccabf3f30c 152 void AlohaTransceiver::poll()
rba90 0:e2ccabf3f30c 153 {
rba90 0:e2ccabf3f30c 154 switch( State )
rba90 0:e2ccabf3f30c 155 {
rba90 0:e2ccabf3f30c 156 case RX:
rba90 5:c3741633dc6f 157 {
rba90 0:e2ccabf3f30c 158 // create new frame instance
rba90 0:e2ccabf3f30c 159 AlohaFrame frame(Buffer, BufferSize);
rba90 0:e2ccabf3f30c 160
rba90 25:bcd1cee4e5a8 161 // schedule the ack frame immediatly after the data frame is received
rba90 25:bcd1cee4e5a8 162 if (frame.getType() == AlohaFrame::Aloha_Data)
rba90 25:bcd1cee4e5a8 163 {
rba90 25:bcd1cee4e5a8 164 sendAck(&frame);
rba90 25:bcd1cee4e5a8 165 }
rba90 25:bcd1cee4e5a8 166 else if (frame.getType() == AlohaFrame::Aloha_ACK)
rba90 25:bcd1cee4e5a8 167 {
rba90 25:bcd1cee4e5a8 168 #ifdef DEBUG_ALOHA
rba90 25:bcd1cee4e5a8 169 printf("TXACK::SEQID:0x%x\r\n", frame.getSequenceID());
rba90 25:bcd1cee4e5a8 170 #endif
rba90 25:bcd1cee4e5a8 171 }
rba90 25:bcd1cee4e5a8 172
rba90 11:3e1ff29da71a 173 // check destination
rba90 11:3e1ff29da71a 174 // if the destination is the device id, then processing, otherwise drop the packet and continue
rba90 11:3e1ff29da71a 175 // listening
rba90 11:3e1ff29da71a 176 if (frame.getDestinationAddress() == (deviceId & 0x0f))
rba90 25:bcd1cee4e5a8 177 {
rba90 11:3e1ff29da71a 178 // check registered callback function
rba90 11:3e1ff29da71a 179 // execute callback functions if registered
rba90 25:bcd1cee4e5a8 180 uint8_t type = frame.getType();
rba90 17:c6e2e2cd6e5f 181
rba90 17:c6e2e2cd6e5f 182 if (AlohaTypeCallbackTable[type] != NULL)
rba90 11:3e1ff29da71a 183 {
rba90 25:bcd1cee4e5a8 184 uint8_t payload_length = frame.getPayloadLength();
rba90 25:bcd1cee4e5a8 185 uint8_t payload[payload_length];
rba90 25:bcd1cee4e5a8 186 uint8_t src_addr = frame.getSourceAddress();
rba90 25:bcd1cee4e5a8 187
rba90 25:bcd1cee4e5a8 188 // extract payload
rba90 25:bcd1cee4e5a8 189 for (uint8_t i = 0; i < payload_length; i++)
rba90 25:bcd1cee4e5a8 190 {
rba90 25:bcd1cee4e5a8 191 payload[i] = frame.getPayload(i);
rba90 25:bcd1cee4e5a8 192 }
rba90 25:bcd1cee4e5a8 193
rba90 25:bcd1cee4e5a8 194 // execute callback function
rba90 17:c6e2e2cd6e5f 195 AlohaTypeCallbackTable[type](payload, payload_length, src_addr);
rba90 11:3e1ff29da71a 196 }
rba90 0:e2ccabf3f30c 197 }
rba90 0:e2ccabf3f30c 198
rba90 10:065a4b58c6ff 199 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 200 State = LOWPOWER;
rba90 0:e2ccabf3f30c 201 break;
rba90 0:e2ccabf3f30c 202 }
rba90 0:e2ccabf3f30c 203 case TX:
rba90 0:e2ccabf3f30c 204 {
rba90 10:065a4b58c6ff 205 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 206 State = LOWPOWER;
rba90 0:e2ccabf3f30c 207 break;
rba90 0:e2ccabf3f30c 208 }
rba90 0:e2ccabf3f30c 209 case RX_TIMEOUT:
rba90 0:e2ccabf3f30c 210 {
rba90 10:065a4b58c6ff 211 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 212 State = LOWPOWER;
rba90 0:e2ccabf3f30c 213 break;
rba90 0:e2ccabf3f30c 214 }
rba90 0:e2ccabf3f30c 215 case RX_ERROR:
rba90 0:e2ccabf3f30c 216 {
rba90 10:065a4b58c6ff 217 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 218 State = LOWPOWER;
rba90 0:e2ccabf3f30c 219 break;
rba90 0:e2ccabf3f30c 220 }
rba90 0:e2ccabf3f30c 221 case TX_TIMEOUT:
rba90 0:e2ccabf3f30c 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 LOWPOWER:
rba90 0:e2ccabf3f30c 228 {
rba90 22:2e39f382f782 229 // transmit packet when the radio is free
rba90 23:4b51a8e27f6a 230 if (AlohaTxQueue.getCounter() > 0)
rba90 22:2e39f382f782 231 {
rba90 22:2e39f382f782 232 AlohaFrame *frame = AlohaTxQueue.dequeue();
rba90 22:2e39f382f782 233
rba90 25:bcd1cee4e5a8 234 #ifdef DEBUG_ALOHA
rba90 25:bcd1cee4e5a8 235 printf("\r\nTXDATA:ADDR:0x%x, SEQID:0x%x\r\n", frame->getDestinationAddress(), frame->getSequenceID());
rba90 25:bcd1cee4e5a8 236 #endif
rba90 25:bcd1cee4e5a8 237
rba90 22:2e39f382f782 238 // create a buffer for transmit
rba90 22:2e39f382f782 239 uint8_t frame_length = frame->getPayloadLength() + FIXED_BYTE;
rba90 22:2e39f382f782 240 uint8_t buffer[frame_length]; // 4 fix fields
rba90 22:2e39f382f782 241 memset(buffer, 0x0, sizeof(buffer));
rba90 22:2e39f382f782 242
rba90 22:2e39f382f782 243 // copy content to buffer
rba90 22:2e39f382f782 244 frame->serialize(buffer);
rba90 22:2e39f382f782 245
rba90 22:2e39f382f782 246 // send to radio
rba90 22:2e39f382f782 247 Radio.Send(buffer, frame_length);
rba90 22:2e39f382f782 248
rba90 22:2e39f382f782 249 // free memory
rba90 22:2e39f382f782 250 delete frame;
rba90 22:2e39f382f782 251 }
rba90 0:e2ccabf3f30c 252 break;
rba90 0:e2ccabf3f30c 253 }
rba90 0:e2ccabf3f30c 254 default:
rba90 0:e2ccabf3f30c 255 {
rba90 0:e2ccabf3f30c 256 State = LOWPOWER;
rba90 0:e2ccabf3f30c 257 break;
rba90 0:e2ccabf3f30c 258 }
rba90 0:e2ccabf3f30c 259 }
rba90 0:e2ccabf3f30c 260 }
rba90 0:e2ccabf3f30c 261
rba90 24:8f31c33c7675 262 bool AlohaTransceiver::send(BasicPacket *packet)
rba90 24:8f31c33c7675 263 {
rba90 24:8f31c33c7675 264 // for the reason that we only transmit basic packet format, the
rba90 24:8f31c33c7675 265 // length is always 8
rba90 24:8f31c33c7675 266 uint8_t payload_length = 8;
rba90 24:8f31c33c7675 267
rba90 24:8f31c33c7675 268 // get destination address
rba90 24:8f31c33c7675 269 uint8_t destination_address = findNextHop(packet->getDestinationID());
rba90 24:8f31c33c7675 270
rba90 24:8f31c33c7675 271 // serialize the packet from upper layer
rba90 24:8f31c33c7675 272 uint8_t buffer[payload_length];
rba90 24:8f31c33c7675 273 memset(buffer, 0x0, sizeof(buffer));
rba90 24:8f31c33c7675 274
rba90 24:8f31c33c7675 275 // copy bytes into buffer
rba90 24:8f31c33c7675 276 packet->serialize(buffer);
rba90 17:c6e2e2cd6e5f 277
rba90 17:c6e2e2cd6e5f 278 // create a new frame
rba90 22:2e39f382f782 279 AlohaFrame *frame = new AlohaFrame();
rba90 17:c6e2e2cd6e5f 280
rba90 22:2e39f382f782 281 // set properfies
rba90 24:8f31c33c7675 282 // set payload as data
rba90 22:2e39f382f782 283 frame->setType(AlohaFrame::Aloha_Data);
rba90 24:8f31c33c7675 284
rba90 24:8f31c33c7675 285 // set payload length (8 bytes for BasicPacket)
rba90 22:2e39f382f782 286 frame->setPayloadLength(payload_length);
rba90 24:8f31c33c7675 287
rba90 24:8f31c33c7675 288 // set mac layer device id
rba90 22:2e39f382f782 289 frame->setSourceAddress(deviceId);
rba90 24:8f31c33c7675 290
rba90 24:8f31c33c7675 291 // set mac layer destination id
rba90 24:8f31c33c7675 292 // for multiple hop system, the destination is the next hop
rba90 24:8f31c33c7675 293 // in this case, we use destination id from upper layer
rba90 24:8f31c33c7675 294 frame->setDestinationAddress(packet->getDestinationID());
rba90 24:8f31c33c7675 295
rba90 24:8f31c33c7675 296 // set full message flag (always true in this case)
rba90 22:2e39f382f782 297 frame->setFullMessageFlag(0x1);
rba90 22:2e39f382f782 298
rba90 24:8f31c33c7675 299 // use dest_addr as key for accessing sequence id
rba90 24:8f31c33c7675 300 // the seqid should increase as it successfully transmit the packet
rba90 24:8f31c33c7675 301 frame->setSequenceID(seqid[destination_address]++);
rba90 24:8f31c33c7675 302
rba90 22:2e39f382f782 303 // set payload
rba90 17:c6e2e2cd6e5f 304 for (uint8_t i = 0; i < payload_length; i++)
rba90 17:c6e2e2cd6e5f 305 {
rba90 24:8f31c33c7675 306 frame->setPayload(i, buffer[i]);
rba90 17:c6e2e2cd6e5f 307 }
rba90 17:c6e2e2cd6e5f 308
rba90 17:c6e2e2cd6e5f 309 // calculate crc
rba90 22:2e39f382f782 310 frame->generateCrc();
rba90 17:c6e2e2cd6e5f 311
rba90 22:2e39f382f782 312 // push frame to the back of queue
rba90 22:2e39f382f782 313 AlohaTxQueue.enqueue(frame);
rba90 24:8f31c33c7675 314
rba90 17:c6e2e2cd6e5f 315 return true;
rba90 0:e2ccabf3f30c 316 }
rba90 0:e2ccabf3f30c 317
rba90 25:bcd1cee4e5a8 318 void AlohaTransceiver::sendAck(AlohaFrame *inFrame)
rba90 25:bcd1cee4e5a8 319 {
rba90 25:bcd1cee4e5a8 320 // create a new frame by calling it's constructor
rba90 25:bcd1cee4e5a8 321 AlohaFrame *outFrame = new AlohaFrame();
rba90 25:bcd1cee4e5a8 322
rba90 25:bcd1cee4e5a8 323 // set frame type
rba90 25:bcd1cee4e5a8 324 outFrame->setType(AlohaFrame::Aloha_ACK);
rba90 25:bcd1cee4e5a8 325
rba90 25:bcd1cee4e5a8 326 // set payload length (0 byte payload for ack frame)
rba90 25:bcd1cee4e5a8 327 outFrame->setPayloadLength(0);
rba90 25:bcd1cee4e5a8 328
rba90 25:bcd1cee4e5a8 329 // set mac layer device id
rba90 25:bcd1cee4e5a8 330 outFrame->setSourceAddress(deviceId);
rba90 25:bcd1cee4e5a8 331
rba90 25:bcd1cee4e5a8 332 // set mac layer destination id
rba90 25:bcd1cee4e5a8 333 outFrame->setDestinationAddress(inFrame->getSourceAddress());
rba90 25:bcd1cee4e5a8 334
rba90 25:bcd1cee4e5a8 335 // set full message flag
rba90 25:bcd1cee4e5a8 336 outFrame->setFullMessageFlag(0x1);
rba90 25:bcd1cee4e5a8 337
rba90 25:bcd1cee4e5a8 338 // set seqid
rba90 25:bcd1cee4e5a8 339 // the sequence id is always the source id + 1
rba90 25:bcd1cee4e5a8 340 outFrame->setSequenceID(inFrame->getSequenceID() + 1);
rba90 25:bcd1cee4e5a8 341
rba90 25:bcd1cee4e5a8 342 // no payload
rba90 25:bcd1cee4e5a8 343
rba90 25:bcd1cee4e5a8 344 // generate cec
rba90 25:bcd1cee4e5a8 345 outFrame->generateCrc();
rba90 25:bcd1cee4e5a8 346
rba90 25:bcd1cee4e5a8 347 // push frame to the back of queue
rba90 25:bcd1cee4e5a8 348 AlohaTxQueue.enqueue(outFrame);
rba90 25:bcd1cee4e5a8 349
rba90 25:bcd1cee4e5a8 350 // debug
rba90 25:bcd1cee4e5a8 351 #ifdef DEBUG_ALOHA
rba90 25:bcd1cee4e5a8 352 printf("\r\nTXACK::ADDR:0x%x, SEQID:0x%x\r\n", outFrame->getDestinationAddress(), outFrame->getSequenceID());
rba90 25:bcd1cee4e5a8 353 #endif
rba90 25:bcd1cee4e5a8 354 }
rba90 25:bcd1cee4e5a8 355
rba90 0:e2ccabf3f30c 356 void AlohaTransceiver::registerType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 357 {
rba90 0:e2ccabf3f30c 358 AlohaTypeCallbackTable[type] = f;
rba90 0:e2ccabf3f30c 359 }
rba90 0:e2ccabf3f30c 360
rba90 0:e2ccabf3f30c 361 void AlohaTransceiver::deRegisterType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 362 {
rba90 0:e2ccabf3f30c 363 AlohaTypeCallbackTable[type] = NULL;
rba90 0:e2ccabf3f30c 364 }
rba90 0:e2ccabf3f30c 365
rba90 2:fa264e48d5f7 366 int16_t AlohaTransceiver::getRssi()
rba90 2:fa264e48d5f7 367 {
rba90 2:fa264e48d5f7 368 return RssiValue;
rba90 2:fa264e48d5f7 369 }
rba90 2:fa264e48d5f7 370
rba90 2:fa264e48d5f7 371 int8_t AlohaTransceiver::getSnr()
rba90 2:fa264e48d5f7 372 {
rba90 2:fa264e48d5f7 373 return SnrValue;
rba90 2:fa264e48d5f7 374 }
rba90 2:fa264e48d5f7 375
rba90 17:c6e2e2cd6e5f 376 uint8_t AlohaTransceiver::getDeviceID()
rba90 11:3e1ff29da71a 377 {
rba90 11:3e1ff29da71a 378 return deviceId;
rba90 11:3e1ff29da71a 379 }
rba90 11:3e1ff29da71a 380
rba90 17:c6e2e2cd6e5f 381 void AlohaTransceiver::setDeviceID(uint8_t id)
rba90 11:3e1ff29da71a 382 {
rba90 11:3e1ff29da71a 383 deviceId = id;
rba90 11:3e1ff29da71a 384 }
rba90 11:3e1ff29da71a 385
rba90 24:8f31c33c7675 386 uint8_t AlohaTransceiver::findNextHop(uint8_t addr)
rba90 24:8f31c33c7675 387 {
rba90 24:8f31c33c7675 388 // TODO: maintain a routing lookup table for choosing shortest path
rba90 24:8f31c33c7675 389 return addr;
rba90 24:8f31c33c7675 390 }
rba90 24:8f31c33c7675 391
rba90 8:4bda842f73d4 392 #if USE_MODEM_LORA == 1
rba90 8:4bda842f73d4 393 AlohaTransceiver::LoRaSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 394 {
rba90 8:4bda842f73d4 395 return &Settings;
rba90 8:4bda842f73d4 396 }
rba90 8:4bda842f73d4 397
rba90 8:4bda842f73d4 398 #elif USE_MODEM_FSK == 1
rba90 8:4bda842f73d4 399 AlohaTransceiver::FskSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 400 {
rba90 8:4bda842f73d4 401 return &Settings;
rba90 8:4bda842f73d4 402 }
rba90 8:4bda842f73d4 403 #else
rba90 8:4bda842f73d4 404 #error "Please define a modem in the compiler options."
rba90 8:4bda842f73d4 405 #endif
rba90 8:4bda842f73d4 406
rba90 0:e2ccabf3f30c 407 void OnTxDone( void )
rba90 0:e2ccabf3f30c 408 {
rba90 0:e2ccabf3f30c 409 Radio.Sleep( );
rba90 0:e2ccabf3f30c 410 State = TX;
rba90 18:3e6483550f25 411
rba90 18:3e6483550f25 412 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 413 debug("> OnTxDone\n\r" );
rba90 18:3e6483550f25 414 #endif
rba90 0:e2ccabf3f30c 415 }
rba90 0:e2ccabf3f30c 416
rba90 0:e2ccabf3f30c 417 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
rba90 0:e2ccabf3f30c 418 {
rba90 0:e2ccabf3f30c 419 Radio.Sleep( );
rba90 0:e2ccabf3f30c 420
rba90 0:e2ccabf3f30c 421 // safeguard: if size exceeded maximum buffer size, it will cause memory overflow
rba90 0:e2ccabf3f30c 422 BufferSize = size ? BUFFER_SIZE : size <= BUFFER_SIZE;
rba90 0:e2ccabf3f30c 423
rba90 0:e2ccabf3f30c 424 memcpy( Buffer, payload, BufferSize );
rba90 0:e2ccabf3f30c 425 RssiValue = rssi;
rba90 0:e2ccabf3f30c 426 SnrValue = snr;
rba90 0:e2ccabf3f30c 427 State = RX;
rba90 18:3e6483550f25 428
rba90 18:3e6483550f25 429 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 430 debug("> OnRxDone\n\r" );
rba90 18:3e6483550f25 431 #endif
rba90 0:e2ccabf3f30c 432 }
rba90 0:e2ccabf3f30c 433
rba90 0:e2ccabf3f30c 434 void OnTxTimeout( void )
rba90 0:e2ccabf3f30c 435 {
rba90 0:e2ccabf3f30c 436 Radio.Sleep( );
rba90 0:e2ccabf3f30c 437 State = TX_TIMEOUT;
rba90 18:3e6483550f25 438
rba90 18:3e6483550f25 439 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 440 debug("> OnTxTimeout\n\r" );
rba90 18:3e6483550f25 441 #endif
rba90 0:e2ccabf3f30c 442 }
rba90 0:e2ccabf3f30c 443
rba90 0:e2ccabf3f30c 444 void OnRxTimeout( void )
rba90 0:e2ccabf3f30c 445 {
rba90 0:e2ccabf3f30c 446 Radio.Sleep( );
rba90 0:e2ccabf3f30c 447 Buffer[ BufferSize ] = 0;
rba90 0:e2ccabf3f30c 448 State = RX_TIMEOUT;
rba90 18:3e6483550f25 449
rba90 18:3e6483550f25 450 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 451 debug("> OnRxTimeout\n\r" );
rba90 18:3e6483550f25 452 #endif
rba90 0:e2ccabf3f30c 453 }
rba90 0:e2ccabf3f30c 454
rba90 0:e2ccabf3f30c 455 void OnRxError( void )
rba90 0:e2ccabf3f30c 456 {
rba90 0:e2ccabf3f30c 457 Radio.Sleep( );
rba90 0:e2ccabf3f30c 458 State = RX_ERROR;
rba90 18:3e6483550f25 459
rba90 18:3e6483550f25 460 #ifdef DEBUG_ALOHA
rba90 18:3e6483550f25 461 debug( "> OnRxError\n\r" );
rba90 18:3e6483550f25 462 #endif
rba90 0:e2ccabf3f30c 463 }
rba90 24:8f31c33c7675 464