ENEL400 / Mbed 2 deprecated LoRaBaseStation

Wireless interface using LoRa technology

Dependencies:   AlohaTransceiver RingBuffer SX1276Lib SerialInterfaceProtocol mbed L3PDU

main.cpp@6:19457108c899, 2016-07-27 (annotated)

Committer:
rba90
Date:
Wed Jul 27 03:21:37 2016 +0000
Revision:
6:19457108c899
Parent:
5:445f35444a6a
Child:
8:332099ece6e9
fix error

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rba90 0:1e42d79b42e1 1 #include "mbed.h"
rba90 0:1e42d79b42e1 2 #include "AlohaTransceiver.h"
rba90 0:1e42d79b42e1 3 #include "buffer.h"
rba90 0:1e42d79b42e1 4 #include "SerialInterfaceProtocol.h"
rba90 0:1e42d79b42e1 5 #include "AlohaFrame.h"
rba90 0:1e42d79b42e1 6
rba90 0:1e42d79b42e1 7 Serial pc(USBTX, USBRX);
rba90 0:1e42d79b42e1 8
rba90 0:1e42d79b42e1 9 // sip uses two buffer queues
rba90 0:1e42d79b42e1 10 CircularBuffer<uint8_t> SerialInputBuffer;
rba90 0:1e42d79b42e1 11 CircularBuffer<uint8_t> SerialOutputBuffer;
rba90 0:1e42d79b42e1 12 SerialInterfaceProtocol SIP(&SerialInputBuffer, &SerialOutputBuffer);
rba90 0:1e42d79b42e1 13
rba90 0:1e42d79b42e1 14 // aloha transceiver
rba90 0:1e42d79b42e1 15 AlohaTransceiver aloha;
rba90 0:1e42d79b42e1 16 AlohaFrame txFrame;
rba90 0:1e42d79b42e1 17
rba90 0:1e42d79b42e1 18 void serialInterruptHandler() {
rba90 0:1e42d79b42e1 19 // Note: you need to actually read from the serial to clear the RX interrupt
rba90 0:1e42d79b42e1 20 int c = pc.getc();
rba90 0:1e42d79b42e1 21
rba90 0:1e42d79b42e1 22 // add to buffer
rba90 0:1e42d79b42e1 23 if (SerialInputBuffer.isLocked())
rba90 0:1e42d79b42e1 24 {
rba90 0:1e42d79b42e1 25 printf("Mutex Locked\r\n");
rba90 0:1e42d79b42e1 26 }
rba90 0:1e42d79b42e1 27 else
rba90 0:1e42d79b42e1 28 {
rba90 0:1e42d79b42e1 29 SerialInputBuffer.enqueue((uint8_t) c);
rba90 0:1e42d79b42e1 30 }
rba90 0:1e42d79b42e1 31 }
rba90 0:1e42d79b42e1 32
rba90 0:1e42d79b42e1 33 int toggleChecksum(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length)
rba90 0:1e42d79b42e1 34 {
rba90 0:1e42d79b42e1 35 // one payload
rba90 0:1e42d79b42e1 36 if (payload_length != 1)
rba90 0:1e42d79b42e1 37 {
rba90 0:1e42d79b42e1 38 sprintf((char *) response, "Wrong Payload Length\r\n");
rba90 0:1e42d79b42e1 39 *response_length = 22;
rba90 0:1e42d79b42e1 40 return 1;
rba90 0:1e42d79b42e1 41 }
rba90 0:1e42d79b42e1 42
rba90 0:1e42d79b42e1 43 if ((bool) payload[0])
rba90 0:1e42d79b42e1 44 {
rba90 0:1e42d79b42e1 45 SIP.enableChecksum();
rba90 0:1e42d79b42e1 46 }
rba90 0:1e42d79b42e1 47 else
rba90 0:1e42d79b42e1 48 {
rba90 0:1e42d79b42e1 49 SIP.disableChecksum();
rba90 0:1e42d79b42e1 50 }
rba90 0:1e42d79b42e1 51
rba90 0:1e42d79b42e1 52 return 0;
rba90 0:1e42d79b42e1 53 }
rba90 0:1e42d79b42e1 54
rba90 6:19457108c899 55 int sendMessage(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length)
rba90 6:19457108c899 56 {
rba90 6:19457108c899 57 static uint8_t seqid = 0;
rba90 6:19457108c899 58
rba90 6:19457108c899 59 // prepare for the frame
rba90 6:19457108c899 60 txFrame.setType(AlohaFrame::Aloha_Data);
rba90 6:19457108c899 61 txFrame.setPayloadLength(0x0);
rba90 6:19457108c899 62 txFrame.setSourceAddress(0x1);
rba90 6:19457108c899 63 txFrame.setDestinationAddress(0x2);
rba90 6:19457108c899 64 txFrame.setFullMessageFlag(0x1);
rba90 6:19457108c899 65 txFrame.setSequenceID(seqid);
rba90 6:19457108c899 66 txFrame.generateCrc();
rba90 6:19457108c899 67
rba90 6:19457108c899 68
rba90 6:19457108c899 69 uint8_t buffer[20];
rba90 6:19457108c899 70 memset(buffer, 0x0, sizeof(buffer));
rba90 6:19457108c899 71 txFrame.serialize(buffer);
rba90 6:19457108c899 72
rba90 6:19457108c899 73 aloha.send(buffer, 20);
rba90 6:19457108c899 74
rba90 6:19457108c899 75 seqid += 1;
rba90 6:19457108c899 76
rba90 6:19457108c899 77 return 0;
rba90 6:19457108c899 78 }
rba90 6:19457108c899 79
rba90 2:ae85337d4ca7 80 void AlohaDataEcho(AlohaFrame *frame)
rba90 3:a4f6abad9378 81 {
rba90 2:ae85337d4ca7 82 // get rssi and snr
rba90 2:ae85337d4ca7 83 uint16_t rssi = aloha.getRssi();
rba90 2:ae85337d4ca7 84 uint8_t snr = aloha.getSnr();
rba90 2:ae85337d4ca7 85
rba90 2:ae85337d4ca7 86 uint8_t rssi_h = (rssi & 0xff00) >> 8;
rba90 2:ae85337d4ca7 87 uint8_t rssi_l = rssi & 0xff;
rba90 2:ae85337d4ca7 88
rba90 2:ae85337d4ca7 89 // Transmit RSSI and SNR back to sender
rba90 2:ae85337d4ca7 90 txFrame.setType(AlohaFrame::Aloha_Data);
rba90 2:ae85337d4ca7 91 txFrame.setPayloadLength(3);
rba90 2:ae85337d4ca7 92 txFrame.setSourceAddress(frame->getDestinationAddress());
rba90 2:ae85337d4ca7 93 txFrame.setDestinationAddress(frame->getSourceAddress());
rba90 2:ae85337d4ca7 94 txFrame.setFullMessageFlag(frame->getFullMessageFlag());
rba90 2:ae85337d4ca7 95 txFrame.setSequenceID(frame->getSequenceID() + 1);
rba90 2:ae85337d4ca7 96 txFrame.setPayload(snr, 0);
rba90 2:ae85337d4ca7 97 txFrame.setPayload(rssi_h, 1);
rba90 2:ae85337d4ca7 98 txFrame.setPayload(rssi_l, 2);
rba90 2:ae85337d4ca7 99 txFrame.generateCrc();
rba90 2:ae85337d4ca7 100
rba90 2:ae85337d4ca7 101
rba90 2:ae85337d4ca7 102 uint8_t buffer[20];
rba90 2:ae85337d4ca7 103 memset(buffer, 0x0, sizeof(buffer));
rba90 2:ae85337d4ca7 104 txFrame.serialize(buffer);
rba90 2:ae85337d4ca7 105
rba90 2:ae85337d4ca7 106 aloha.send(buffer, 20);
rba90 2:ae85337d4ca7 107
rba90 3:a4f6abad9378 108 // print received message
rba90 3:a4f6abad9378 109 printf("-----------------------------------------\r\n");
rba90 3:a4f6abad9378 110 printf(">Received Frame\r\n");
rba90 3:a4f6abad9378 111 printf("> Type: 0x%x, PayloadLength: 0x%x\r\n", frame->getType(), frame->getPayloadLength());
rba90 3:a4f6abad9378 112 printf("> SrcAddr: 0x%x, DestAddr: 0x%x\r\n", frame->getSourceAddress(), frame->getDestinationAddress());
rba90 3:a4f6abad9378 113 printf("> FMF: 0x%x, SequenceID: 0x%x\r\n", frame->getFullMessageFlag(), frame->getSequenceID());
rba90 3:a4f6abad9378 114 for (uint8_t i = 0; i < frame->getPayloadLength(); i++)
rba90 3:a4f6abad9378 115 {
rba90 3:a4f6abad9378 116 printf("> Payload[%d]: 0x%x\r\n", i, frame->getPayload(i));
rba90 3:a4f6abad9378 117 }
rba90 3:a4f6abad9378 118 printf("> CRC: 0x%x\r\n", frame->getCrc());
rba90 3:a4f6abad9378 119 printf("-----------------------------------------\r\n");
rba90 0:1e42d79b42e1 120 }
rba90 0:1e42d79b42e1 121
rba90 0:1e42d79b42e1 122 int main() {
rba90 0:1e42d79b42e1 123 // initialize radio module
rba90 5:445f35444a6a 124 aloha.boardInit();
rba90 6:19457108c899 125 aloha.updateSettings();
rba90 6:19457108c899 126 aloha.enable();
rba90 0:1e42d79b42e1 127
rba90 0:1e42d79b42e1 128 // attach serial interrupt handler
rba90 0:1e42d79b42e1 129 pc.attach(&serialInterruptHandler);
rba90 0:1e42d79b42e1 130
rba90 0:1e42d79b42e1 131 // register callback functions for SIP
rba90 0:1e42d79b42e1 132 SIP.registerCommand(0x00, toggleChecksum);
rba90 6:19457108c899 133 SIP.registerCommand(0x01, sendMessage);
rba90 0:1e42d79b42e1 134
rba90 0:1e42d79b42e1 135 // register callback functions for aloha transceiver
rba90 2:ae85337d4ca7 136 aloha.registerType(AlohaFrame::Aloha_Data, AlohaDataEcho);
rba90 0:1e42d79b42e1 137
rba90 0:1e42d79b42e1 138 while(1) {
rba90 0:1e42d79b42e1 139 SIP.poll();
rba90 0:1e42d79b42e1 140 aloha.poll();
rba90 0:1e42d79b42e1 141
rba90 0:1e42d79b42e1 142 while (SerialOutputBuffer.getCounter() > 0)
rba90 0:1e42d79b42e1 143 {
rba90 0:1e42d79b42e1 144 uint8_t ch;
rba90 0:1e42d79b42e1 145 ch = SerialOutputBuffer.dequeue();
rba90 0:1e42d79b42e1 146 pc.putc(ch);
rba90 0:1e42d79b42e1 147 }
rba90 0:1e42d79b42e1 148 }
rba90 0:1e42d79b42e1 149 }