ENEL400 / AlohaTransceiver

Basic MAC data interface for LoRa transceiver

Dependencies:   L2Frame crc

Dependents:   LoRaBaseStation LoRaTerminal

AlohaTransceiver.cpp@29:6c59b0bba861, 2016-09-03 (annotated)

Committer:
rba90
Date:
Sat Sep 03 02:47:46 2016 +0000
Revision:
29:6c59b0bba861
Parent:
28:2c0e115b4f72
Child:
30:bccad60351ac
minor changes to the debug text

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 29:6c59b0bba861 181 {
rba90 29:6c59b0bba861 182 #ifdef DEBUG_ALOHA
rba90 29:6c59b0bba861 183 printf("\r\nRXDATA::SRC_ADDR:0x%x,SEQID:0x%x\r\n", frame->getSourceAddress(), frame->getSequenceID());
rba90 29:6c59b0bba861 184 #endif
rba90 27:463688e3bd12 185 sendAck(frame);
rba90 27:463688e3bd12 186 }
rba90 27:463688e3bd12 187 else if (type == AlohaFrame::Aloha_ACK)
rba90 27:463688e3bd12 188 {
rba90 26:e87c8d345644 189 #ifdef DEBUG_ALOHA
rba90 29:6c59b0bba861 190 printf("\r\nRXACK::SRC_ADDR:0x%x,SEQID:0x%x\r\n", frame->getSourceAddress(), frame->getSequenceID());
rba90 26:e87c8d345644 191 #endif
rba90 27:463688e3bd12 192 }
rba90 27:463688e3bd12 193
rba90 27:463688e3bd12 194 // check registered callback function
rba90 27:463688e3bd12 195 // execute callback functions if registered
rba90 27:463688e3bd12 196 if (AlohaTypeCallbackTable[type] != NULL)
rba90 27:463688e3bd12 197 {
rba90 27:463688e3bd12 198 uint8_t payload_length = frame->getPayloadLength();
rba90 27:463688e3bd12 199 uint8_t payload[payload_length];
rba90 27:463688e3bd12 200 uint8_t src_addr = frame->getSourceAddress();
rba90 27:463688e3bd12 201
rba90 27:463688e3bd12 202 // extract payload
rba90 27:463688e3bd12 203 for (uint8_t i = 0; i < payload_length; i++)
rba90 27:463688e3bd12 204 {
rba90 27:463688e3bd12 205 payload[i] = frame->getPayload(i);
rba90 27:463688e3bd12 206 }
rba90 27:463688e3bd12 207
rba90 27:463688e3bd12 208 // execute callback function
rba90 27:463688e3bd12 209 AlohaTypeCallbackTable[type](payload, payload_length, src_addr);
rba90 27:463688e3bd12 210 }
rba90 26:e87c8d345644 211 }
rba90 17:c6e2e2cd6e5f 212
rba90 27:463688e3bd12 213 // free memory
rba90 27:463688e3bd12 214 delete frame;
rba90 0:e2ccabf3f30c 215 }
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:
rba90 0:e2ccabf3f30c 222 {
rba90 28:2c0e115b4f72 223 // set tx to done, allow next transmission
rba90 28:2c0e115b4f72 224 setTxDoneFlag();
rba90 28:2c0e115b4f72 225
rba90 10:065a4b58c6ff 226 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 227 State = LOWPOWER;
rba90 0:e2ccabf3f30c 228 break;
rba90 0:e2ccabf3f30c 229 }
rba90 0:e2ccabf3f30c 230 case RX_TIMEOUT:
rba90 0:e2ccabf3f30c 231 {
rba90 10:065a4b58c6ff 232 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 233 State = LOWPOWER;
rba90 0:e2ccabf3f30c 234 break;
rba90 0:e2ccabf3f30c 235 }
rba90 0:e2ccabf3f30c 236 case RX_ERROR:
rba90 0:e2ccabf3f30c 237 {
rba90 10:065a4b58c6ff 238 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 239 State = LOWPOWER;
rba90 0:e2ccabf3f30c 240 break;
rba90 0:e2ccabf3f30c 241 }
rba90 0:e2ccabf3f30c 242 case TX_TIMEOUT:
rba90 0:e2ccabf3f30c 243 {
rba90 29:6c59b0bba861 244 // set tx to done, allow next transmission
rba90 29:6c59b0bba861 245 setTxDoneFlag();
rba90 29:6c59b0bba861 246
rba90 10:065a4b58c6ff 247 Radio.Rx( 0 );
rba90 0:e2ccabf3f30c 248 State = LOWPOWER;
rba90 0:e2ccabf3f30c 249 break;
rba90 0:e2ccabf3f30c 250 }
rba90 0:e2ccabf3f30c 251 case LOWPOWER:
rba90 0:e2ccabf3f30c 252 {
rba90 22:2e39f382f782 253 // transmit packet when the radio is free
rba90 28:2c0e115b4f72 254 if (getTxDoneFlag() && AlohaTxQueue.getCounter() > 0)
rba90 22:2e39f382f782 255 {
rba90 22:2e39f382f782 256 AlohaFrame *frame = AlohaTxQueue.dequeue();
rba90 22:2e39f382f782 257
rba90 22:2e39f382f782 258 // create a buffer for transmit
rba90 22:2e39f382f782 259 uint8_t frame_length = frame->getPayloadLength() + FIXED_BYTE;
rba90 22:2e39f382f782 260 uint8_t buffer[frame_length]; // 4 fix fields
rba90 22:2e39f382f782 261 memset(buffer, 0x0, sizeof(buffer));
rba90 22:2e39f382f782 262
rba90 22:2e39f382f782 263 // copy content to buffer
rba90 22:2e39f382f782 264 frame->serialize(buffer);
rba90 22:2e39f382f782 265
rba90 22:2e39f382f782 266 // send to radio
rba90 22:2e39f382f782 267 Radio.Send(buffer, frame_length);
rba90 22:2e39f382f782 268
rba90 28:2c0e115b4f72 269 // block the next transmission until previous transmission is done
rba90 28:2c0e115b4f72 270 clearTxDoneFlag();
rba90 28:2c0e115b4f72 271
rba90 22:2e39f382f782 272 // free memory
rba90 22:2e39f382f782 273 delete frame;
rba90 22:2e39f382f782 274 }
rba90 0:e2ccabf3f30c 275 break;
rba90 0:e2ccabf3f30c 276 }
rba90 0:e2ccabf3f30c 277 default:
rba90 0:e2ccabf3f30c 278 {
rba90 0:e2ccabf3f30c 279 State = LOWPOWER;
rba90 0:e2ccabf3f30c 280 break;
rba90 0:e2ccabf3f30c 281 }
rba90 0:e2ccabf3f30c 282 }
rba90 0:e2ccabf3f30c 283 }
rba90 0:e2ccabf3f30c 284
rba90 24:8f31c33c7675 285 bool AlohaTransceiver::send(BasicPacket *packet)
rba90 24:8f31c33c7675 286 {
rba90 24:8f31c33c7675 287 // for the reason that we only transmit basic packet format, the
rba90 24:8f31c33c7675 288 // length is always 8
rba90 24:8f31c33c7675 289 uint8_t payload_length = 8;
rba90 24:8f31c33c7675 290
rba90 24:8f31c33c7675 291 // get destination address
rba90 24:8f31c33c7675 292 uint8_t destination_address = findNextHop(packet->getDestinationID());
rba90 24:8f31c33c7675 293
rba90 24:8f31c33c7675 294 // serialize the packet from upper layer
rba90 24:8f31c33c7675 295 uint8_t buffer[payload_length];
rba90 24:8f31c33c7675 296 memset(buffer, 0x0, sizeof(buffer));
rba90 24:8f31c33c7675 297
rba90 24:8f31c33c7675 298 // copy bytes into buffer
rba90 24:8f31c33c7675 299 packet->serialize(buffer);
rba90 17:c6e2e2cd6e5f 300
rba90 17:c6e2e2cd6e5f 301 // create a new frame
rba90 22:2e39f382f782 302 AlohaFrame *frame = new AlohaFrame();
rba90 17:c6e2e2cd6e5f 303
rba90 22:2e39f382f782 304 // set properfies
rba90 24:8f31c33c7675 305 // set payload as data
rba90 22:2e39f382f782 306 frame->setType(AlohaFrame::Aloha_Data);
rba90 24:8f31c33c7675 307
rba90 24:8f31c33c7675 308 // set payload length (8 bytes for BasicPacket)
rba90 22:2e39f382f782 309 frame->setPayloadLength(payload_length);
rba90 24:8f31c33c7675 310
rba90 24:8f31c33c7675 311 // set mac layer device id
rba90 22:2e39f382f782 312 frame->setSourceAddress(deviceId);
rba90 24:8f31c33c7675 313
rba90 24:8f31c33c7675 314 // set mac layer destination id
rba90 24:8f31c33c7675 315 // for multiple hop system, the destination is the next hop
rba90 24:8f31c33c7675 316 // in this case, we use destination id from upper layer
rba90 24:8f31c33c7675 317 frame->setDestinationAddress(packet->getDestinationID());
rba90 24:8f31c33c7675 318
rba90 24:8f31c33c7675 319 // set full message flag (always true in this case)
rba90 22:2e39f382f782 320 frame->setFullMessageFlag(0x1);
rba90 22:2e39f382f782 321
rba90 24:8f31c33c7675 322 // use dest_addr as key for accessing sequence id
rba90 24:8f31c33c7675 323 // the seqid should increase as it successfully transmit the packet
rba90 24:8f31c33c7675 324 frame->setSequenceID(seqid[destination_address]++);
rba90 24:8f31c33c7675 325
rba90 22:2e39f382f782 326 // set payload
rba90 17:c6e2e2cd6e5f 327 for (uint8_t i = 0; i < payload_length; i++)
rba90 17:c6e2e2cd6e5f 328 {
rba90 24:8f31c33c7675 329 frame->setPayload(i, buffer[i]);
rba90 17:c6e2e2cd6e5f 330 }
rba90 17:c6e2e2cd6e5f 331
rba90 17:c6e2e2cd6e5f 332 // calculate crc
rba90 22:2e39f382f782 333 frame->generateCrc();
rba90 17:c6e2e2cd6e5f 334
rba90 22:2e39f382f782 335 // push frame to the back of queue
rba90 22:2e39f382f782 336 AlohaTxQueue.enqueue(frame);
rba90 27:463688e3bd12 337
rba90 27:463688e3bd12 338 // debug
rba90 27:463688e3bd12 339 #ifdef DEBUG_ALOHA
rba90 29:6c59b0bba861 340 printf("\r\nTXDATA::DEST_ADDR:0x%x,SEQID:0x%x\r\n", frame->getDestinationAddress(), frame->getSequenceID());
rba90 27:463688e3bd12 341 #endif
rba90 17:c6e2e2cd6e5f 342 return true;
rba90 0:e2ccabf3f30c 343 }
rba90 0:e2ccabf3f30c 344
rba90 25:bcd1cee4e5a8 345 void AlohaTransceiver::sendAck(AlohaFrame *inFrame)
rba90 25:bcd1cee4e5a8 346 {
rba90 25:bcd1cee4e5a8 347 // create a new frame by calling it's constructor
rba90 25:bcd1cee4e5a8 348 AlohaFrame *outFrame = new AlohaFrame();
rba90 25:bcd1cee4e5a8 349
rba90 25:bcd1cee4e5a8 350 // set frame type
rba90 25:bcd1cee4e5a8 351 outFrame->setType(AlohaFrame::Aloha_ACK);
rba90 25:bcd1cee4e5a8 352
rba90 25:bcd1cee4e5a8 353 // set payload length (0 byte payload for ack frame)
rba90 25:bcd1cee4e5a8 354 outFrame->setPayloadLength(0);
rba90 25:bcd1cee4e5a8 355
rba90 25:bcd1cee4e5a8 356 // set mac layer device id
rba90 25:bcd1cee4e5a8 357 outFrame->setSourceAddress(deviceId);
rba90 25:bcd1cee4e5a8 358
rba90 25:bcd1cee4e5a8 359 // set mac layer destination id
rba90 25:bcd1cee4e5a8 360 outFrame->setDestinationAddress(inFrame->getSourceAddress());
rba90 25:bcd1cee4e5a8 361
rba90 25:bcd1cee4e5a8 362 // set full message flag
rba90 25:bcd1cee4e5a8 363 outFrame->setFullMessageFlag(0x1);
rba90 25:bcd1cee4e5a8 364
rba90 25:bcd1cee4e5a8 365 // set seqid
rba90 25:bcd1cee4e5a8 366 // the sequence id is always the source id + 1
rba90 25:bcd1cee4e5a8 367 outFrame->setSequenceID(inFrame->getSequenceID() + 1);
rba90 25:bcd1cee4e5a8 368
rba90 25:bcd1cee4e5a8 369 // no payload
rba90 25:bcd1cee4e5a8 370
rba90 25:bcd1cee4e5a8 371 // generate cec
rba90 25:bcd1cee4e5a8 372 outFrame->generateCrc();
rba90 25:bcd1cee4e5a8 373
rba90 25:bcd1cee4e5a8 374 // push frame to the back of queue
rba90 25:bcd1cee4e5a8 375 AlohaTxQueue.enqueue(outFrame);
rba90 25:bcd1cee4e5a8 376
rba90 25:bcd1cee4e5a8 377 // debug
rba90 25:bcd1cee4e5a8 378 #ifdef DEBUG_ALOHA
rba90 29:6c59b0bba861 379 printf("\r\nTXACK::DEST_ADDR:0x%x,SEQID:0x%x\r\n", outFrame->getDestinationAddress(), outFrame->getSequenceID());
rba90 25:bcd1cee4e5a8 380 #endif
rba90 25:bcd1cee4e5a8 381 }
rba90 25:bcd1cee4e5a8 382
rba90 28:2c0e115b4f72 383 bool AlohaTransceiver::getTxDoneFlag()
rba90 28:2c0e115b4f72 384 {
rba90 28:2c0e115b4f72 385 return CHECK_FLAG(flags, 0);
rba90 28:2c0e115b4f72 386 }
rba90 28:2c0e115b4f72 387
rba90 28:2c0e115b4f72 388 void AlohaTransceiver::setTxDoneFlag()
rba90 28:2c0e115b4f72 389 {
rba90 28:2c0e115b4f72 390 SET_FLAG(flags, 0);
rba90 28:2c0e115b4f72 391 }
rba90 28:2c0e115b4f72 392
rba90 28:2c0e115b4f72 393 void AlohaTransceiver::clearTxDoneFlag()
rba90 28:2c0e115b4f72 394 {
rba90 28:2c0e115b4f72 395 CLEAR_FLAG(flags, 0);
rba90 28:2c0e115b4f72 396 }
rba90 28:2c0e115b4f72 397
rba90 0:e2ccabf3f30c 398 void AlohaTransceiver::registerType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 399 {
rba90 0:e2ccabf3f30c 400 AlohaTypeCallbackTable[type] = f;
rba90 0:e2ccabf3f30c 401 }
rba90 0:e2ccabf3f30c 402
rba90 0:e2ccabf3f30c 403 void AlohaTransceiver::deRegisterType(AlohaFrame::AlohaType_t type, aloha_callback_func f)
rba90 0:e2ccabf3f30c 404 {
rba90 0:e2ccabf3f30c 405 AlohaTypeCallbackTable[type] = NULL;
rba90 0:e2ccabf3f30c 406 }
rba90 0:e2ccabf3f30c 407
rba90 2:fa264e48d5f7 408 int16_t AlohaTransceiver::getRssi()
rba90 2:fa264e48d5f7 409 {
rba90 2:fa264e48d5f7 410 return RssiValue;
rba90 2:fa264e48d5f7 411 }
rba90 2:fa264e48d5f7 412
rba90 2:fa264e48d5f7 413 int8_t AlohaTransceiver::getSnr()
rba90 2:fa264e48d5f7 414 {
rba90 2:fa264e48d5f7 415 return SnrValue;
rba90 2:fa264e48d5f7 416 }
rba90 2:fa264e48d5f7 417
rba90 17:c6e2e2cd6e5f 418 uint8_t AlohaTransceiver::getDeviceID()
rba90 11:3e1ff29da71a 419 {
rba90 11:3e1ff29da71a 420 return deviceId;
rba90 11:3e1ff29da71a 421 }
rba90 11:3e1ff29da71a 422
rba90 17:c6e2e2cd6e5f 423 void AlohaTransceiver::setDeviceID(uint8_t id)
rba90 11:3e1ff29da71a 424 {
rba90 11:3e1ff29da71a 425 deviceId = id;
rba90 11:3e1ff29da71a 426 }
rba90 11:3e1ff29da71a 427
rba90 24:8f31c33c7675 428 uint8_t AlohaTransceiver::findNextHop(uint8_t addr)
rba90 24:8f31c33c7675 429 {
rba90 24:8f31c33c7675 430 // TODO: maintain a routing lookup table for choosing shortest path
rba90 24:8f31c33c7675 431 return addr;
rba90 24:8f31c33c7675 432 }
rba90 24:8f31c33c7675 433
rba90 8:4bda842f73d4 434 #if USE_MODEM_LORA == 1
rba90 8:4bda842f73d4 435 AlohaTransceiver::LoRaSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 436 {
rba90 8:4bda842f73d4 437 return &Settings;
rba90 8:4bda842f73d4 438 }
rba90 8:4bda842f73d4 439
rba90 8:4bda842f73d4 440 #elif USE_MODEM_FSK == 1
rba90 8:4bda842f73d4 441 AlohaTransceiver::FskSettings_t *AlohaTransceiver::getSettings()
rba90 8:4bda842f73d4 442 {
rba90 8:4bda842f73d4 443 return &Settings;
rba90 8:4bda842f73d4 444 }
rba90 8:4bda842f73d4 445 #else
rba90 8:4bda842f73d4 446 #error "Please define a modem in the compiler options."
rba90 8:4bda842f73d4 447 #endif
rba90 8:4bda842f73d4 448
rba90 0:e2ccabf3f30c 449 void OnTxDone( void )
rba90 0:e2ccabf3f30c 450 {
rba90 0:e2ccabf3f30c 451 Radio.Sleep( );
rba90 0:e2ccabf3f30c 452 State = TX;
rba90 18:3e6483550f25 453
rba90 18:3e6483550f25 454 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 455 debug_if(ALLOW_CALLBACK_DEBUG, "> OnTxDone\n\r" );
rba90 18:3e6483550f25 456 #endif
rba90 0:e2ccabf3f30c 457 }
rba90 0:e2ccabf3f30c 458
rba90 0:e2ccabf3f30c 459 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
rba90 0:e2ccabf3f30c 460 {
rba90 27:463688e3bd12 461 uint8_t payload_length;
rba90 27:463688e3bd12 462
rba90 0:e2ccabf3f30c 463 Radio.Sleep( );
rba90 0:e2ccabf3f30c 464
rba90 0:e2ccabf3f30c 465 // safeguard: if size exceeded maximum buffer size, it will cause memory overflow
rba90 27:463688e3bd12 466 payload_length = size ? BUFFER_SIZE : size <= BUFFER_SIZE;
rba90 27:463688e3bd12 467
rba90 27:463688e3bd12 468 // create a new frame instance
rba90 27:463688e3bd12 469 AlohaFrame *frame = new AlohaFrame(payload, payload_length);
rba90 27:463688e3bd12 470
rba90 27:463688e3bd12 471 // push onto the end of queue
rba90 27:463688e3bd12 472 AlohaRxQueue.enqueue(frame);
rba90 0:e2ccabf3f30c 473
rba90 0:e2ccabf3f30c 474 RssiValue = rssi;
rba90 0:e2ccabf3f30c 475 SnrValue = snr;
rba90 0:e2ccabf3f30c 476 State = RX;
rba90 18:3e6483550f25 477
rba90 18:3e6483550f25 478 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 479 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxDone\n\r" );
rba90 18:3e6483550f25 480 #endif
rba90 0:e2ccabf3f30c 481 }
rba90 0:e2ccabf3f30c 482
rba90 0:e2ccabf3f30c 483 void OnTxTimeout( void )
rba90 0:e2ccabf3f30c 484 {
rba90 0:e2ccabf3f30c 485 Radio.Sleep( );
rba90 0:e2ccabf3f30c 486 State = TX_TIMEOUT;
rba90 18:3e6483550f25 487
rba90 18:3e6483550f25 488 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 489 debug_if(ALLOW_CALLBACK_DEBUG, "> OnTxTimeout\n\r" );
rba90 18:3e6483550f25 490 #endif
rba90 0:e2ccabf3f30c 491 }
rba90 0:e2ccabf3f30c 492
rba90 0:e2ccabf3f30c 493 void OnRxTimeout( void )
rba90 0:e2ccabf3f30c 494 {
rba90 0:e2ccabf3f30c 495 Radio.Sleep( );
rba90 0:e2ccabf3f30c 496 State = RX_TIMEOUT;
rba90 18:3e6483550f25 497
rba90 18:3e6483550f25 498 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 499 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxTimeout\n\r" );
rba90 18:3e6483550f25 500 #endif
rba90 0:e2ccabf3f30c 501 }
rba90 0:e2ccabf3f30c 502
rba90 0:e2ccabf3f30c 503 void OnRxError( void )
rba90 0:e2ccabf3f30c 504 {
rba90 0:e2ccabf3f30c 505 Radio.Sleep( );
rba90 0:e2ccabf3f30c 506 State = RX_ERROR;
rba90 18:3e6483550f25 507
rba90 18:3e6483550f25 508 #ifdef DEBUG_ALOHA
rba90 28:2c0e115b4f72 509 debug_if(ALLOW_CALLBACK_DEBUG, "> OnRxError\n\r" );
rba90 18:3e6483550f25 510 #endif
rba90 0:e2ccabf3f30c 511 }
rba90 24:8f31c33c7675 512