Jorge Troncoso / Mbed OS 0A101_mDot_Sensor_Rev3_AUS

a

Dependencies:   Sensor2 MAX31855-1 libmDot-1

radio_sensor.cpp@1:2d0abfac692b, 2018-01-04 (annotated)

Committer:
jortronm2
Date:
Thu Jan 04 03:44:09 2018 +0000
Revision:
1:2d0abfac692b
Parent:
0:1441b10e38a6 
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jortronm2 0:1441b10e38a6 1 /*
jortronm2 0:1441b10e38a6 2 ** Because we're working with relatively small packet sizes (~10 bytes) each set
jortronm2 0:1441b10e38a6 3 ** of sensor data must be split up and sent in multiple packets. To keep track
jortronm2 0:1441b10e38a6 4 ** of these packets they will each contain a id which indicates the set of
jortronm2 0:1441b10e38a6 5 ** sensor data they belong to and a sequence number which indicates their
jortronm2 0:1441b10e38a6 6 ** position in that set of sensor data. The first packet of each set will also
jortronm2 0:1441b10e38a6 7 ** include and additional field which will be the number of packets to expect.
jortronm2 0:1441b10e38a6 8 ** This will make it easy to determine if packets have been dropped and
jortronm2 0:1441b10e38a6 9 ** therefore if the set of sensor data will be valid.
jortronm2 0:1441b10e38a6 10 ** The packet structure:
jortronm2 0:1441b10e38a6 11 ** [id (1 byte)] [sequence (1 byte)] [expected packets (1 byte)] [data (n - 3 bytes)]
jortronm2 0:1441b10e38a6 12 ** [id (1 byte)] [sequence (1 byte)] [data (n - 2 bytes)]
jortronm2 0:1441b10e38a6 13 ** Note:
jortronm2 0:1441b10e38a6 14 ** The ID is allowed to and will be expected to overflow back to 0.
jortronm2 0:1441b10e38a6 15 */
jortronm2 0:1441b10e38a6 16
jortronm2 0:1441b10e38a6 17
jortronm2 0:1441b10e38a6 18 #include "radio_sensor.h"
jortronm2 0:1441b10e38a6 19
jortronm2 0:1441b10e38a6 20
jortronm2 0:1441b10e38a6 21 mDot* dot = NULL;
jortronm2 0:1441b10e38a6 22
jortronm2 0:1441b10e38a6 23 // Network settings.
jortronm2 0:1441b10e38a6 24 static uint8_t radio_network_address[] = {0x65, 0x34, 0x03, 0x04};
jortronm2 0:1441b10e38a6 25 static uint8_t radio_network_session_key[] = {0x23, 0x45, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04};
jortronm2 0:1441b10e38a6 26 static uint8_t radio_data_session_key[] = {0xF0, 0x34, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04};
jortronm2 0:1441b10e38a6 27
jortronm2 0:1441b10e38a6 28 static uint8_t radio_packet_current_id;
jortronm2 0:1441b10e38a6 29
jortronm2 0:1441b10e38a6 30
jortronm2 0:1441b10e38a6 31 extern int8_t radio_sensor_init(enum mts::MTSLog::logLevel logging_level) {
jortronm2 0:1441b10e38a6 32 uint8_t radio_data_rate, radio_power, radio_frequency_band;
jortronm2 0:1441b10e38a6 33 uint32_t radio_frequency;
jortronm2 0:1441b10e38a6 34 lora::ChannelPlan* plan;
jortronm2 0:1441b10e38a6 35
jortronm2 0:1441b10e38a6 36
jortronm2 0:1441b10e38a6 37 radio_packet_current_id = 0;
jortronm2 0:1441b10e38a6 38
jortronm2 0:1441b10e38a6 39
jortronm2 0:1441b10e38a6 40 // Configure the logging level and instatiate the mDot with the correct channel plan.
jortronm2 0:1441b10e38a6 41 mts::MTSLog::setLogLevel(logging_level);
jortronm2 0:1441b10e38a6 42
jortronm2 0:1441b10e38a6 43 #if RADIO_CHANNEL_PLAN == CP_US915
jortronm2 0:1441b10e38a6 44 plan = new lora::ChannelPlan_US915();
jortronm2 0:1441b10e38a6 45 #elif RADIO_CHANNEL_PLAN == CP_AU915
jortronm2 0:1441b10e38a6 46 plan = new lora::ChannelPlan_AU915();
jortronm2 0:1441b10e38a6 47 #elif RADIO_CHANNEL_PLAN == CP_EU868
jortronm2 0:1441b10e38a6 48 plan = new lora::ChannelPlan_EU868();
jortronm2 0:1441b10e38a6 49 #elif RADIO_CHANNEL_PLAN == CP_KR920
jortronm2 0:1441b10e38a6 50 plan = new lora::ChannelPlan_KR920();
jortronm2 0:1441b10e38a6 51 #elif RADIO_CHANNEL_PLAN == CP_AS923
jortronm2 0:1441b10e38a6 52 plan = new lora::ChannelPlan_AS923();
jortronm2 0:1441b10e38a6 53 #elif RADIO_CHANNEL_PLAN == CP_AS923_JAPAN
jortronm2 0:1441b10e38a6 54 plan = new lora::ChannelPlan_AS923_Japan();
jortronm2 0:1441b10e38a6 55 #elif RADIO_CHANNEL_PLAN == CP_IN865
jortronm2 0:1441b10e38a6 56 plan = new lora::ChannelPlan_IN865();
jortronm2 0:1441b10e38a6 57 #endif
jortronm2 0:1441b10e38a6 58 assert(plan);
jortronm2 0:1441b10e38a6 59
jortronm2 0:1441b10e38a6 60 dot = mDot::getInstance(plan);
jortronm2 0:1441b10e38a6 61 assert(dot);
jortronm2 0:1441b10e38a6 62 dot->setLogLevel(logging_level);
jortronm2 0:1441b10e38a6 63
jortronm2 0:1441b10e38a6 64 // Return the mdot to a known state.
jortronm2 0:1441b10e38a6 65 dot->resetConfig();
jortronm2 0:1441b10e38a6 66
jortronm2 0:1441b10e38a6 67 // Configure MDOT network settings.
jortronm2 0:1441b10e38a6 68 if (dot->getJoinMode() != mDot::PEER_TO_PEER) {
jortronm2 0:1441b10e38a6 69 logInfo("changing network join mode to PEER_TO_PEER");
jortronm2 0:1441b10e38a6 70 if (dot->setJoinMode(mDot::PEER_TO_PEER) != mDot::MDOT_OK) {
jortronm2 0:1441b10e38a6 71 logError("failed to set network join mode to PEER_TO_PEER");
jortronm2 0:1441b10e38a6 72 }
jortronm2 0:1441b10e38a6 73 }
jortronm2 0:1441b10e38a6 74
jortronm2 0:1441b10e38a6 75 radio_frequency_band = dot->getFrequencyBand();
jortronm2 0:1441b10e38a6 76 switch (radio_frequency_band) {
jortronm2 0:1441b10e38a6 77 case lora::ChannelPlan::EU868_OLD:
jortronm2 0:1441b10e38a6 78 case lora::ChannelPlan::EU868:
jortronm2 0:1441b10e38a6 79 // 250kHz channels achieve higher throughput
jortronm2 0:1441b10e38a6 80 // DR_6 : SF7 @ 250kHz
jortronm2 0:1441b10e38a6 81 // DR_0 - DR_5 (125kHz channels) available but much slower
jortronm2 0:1441b10e38a6 82 radio_frequency = 869850000;
jortronm2 0:1441b10e38a6 83 radio_data_rate = lora::DR_6;
jortronm2 0:1441b10e38a6 84 // the 869850000 frequency is 100% duty cycle if the total power is under 7 dBm - tx power 4 + antenna gain 3 = 7
jortronm2 0:1441b10e38a6 85 radio_power = 4;
jortronm2 0:1441b10e38a6 86 break;
jortronm2 0:1441b10e38a6 87
jortronm2 0:1441b10e38a6 88 case lora::ChannelPlan::US915_OLD:
jortronm2 0:1441b10e38a6 89 case lora::ChannelPlan::US915:
jortronm2 0:1441b10e38a6 90 case lora::ChannelPlan::AU915_OLD:
jortronm2 0:1441b10e38a6 91 case lora::ChannelPlan::AU915:
jortronm2 0:1441b10e38a6 92 // 500kHz channels achieve highest throughput
jortronm2 0:1441b10e38a6 93 // DR_8 : SF12 @ 500kHz
jortronm2 0:1441b10e38a6 94 // DR_9 : SF11 @ 500kHz
jortronm2 0:1441b10e38a6 95 // DR_10 : SF10 @ 500kHz
jortronm2 0:1441b10e38a6 96 // DR_11 : SF9 @ 500kHz
jortronm2 0:1441b10e38a6 97 // DR_12 : SF8 @ 500kHz
jortronm2 0:1441b10e38a6 98 // DR_13 : SF7 @ 500kHz
jortronm2 0:1441b10e38a6 99 // DR_0 - DR_3 (125kHz channels) available but much slower
jortronm2 0:1441b10e38a6 100 radio_frequency = 915500000;
jortronm2 0:1441b10e38a6 101 radio_data_rate = lora::DR_13;
jortronm2 0:1441b10e38a6 102 // 915 bands have no duty cycle restrictions, set tx power to max
jortronm2 0:1441b10e38a6 103 radio_power = 20;
jortronm2 0:1441b10e38a6 104 break;
jortronm2 0:1441b10e38a6 105
jortronm2 0:1441b10e38a6 106 case lora::ChannelPlan::AS923:
jortronm2 0:1441b10e38a6 107 case lora::ChannelPlan::AS923_JAPAN:
jortronm2 0:1441b10e38a6 108 // 250kHz channels achieve higher throughput
jortronm2 0:1441b10e38a6 109 // DR_6 : SF7 @ 250kHz
jortronm2 0:1441b10e38a6 110 // DR_0 - DR_5 (125kHz channels) available but much slower
jortronm2 0:1441b10e38a6 111 radio_frequency = 924800000;
jortronm2 0:1441b10e38a6 112 radio_data_rate = lora::DR_6;
jortronm2 0:1441b10e38a6 113 radio_power = 16;
jortronm2 0:1441b10e38a6 114 break;
jortronm2 0:1441b10e38a6 115
jortronm2 0:1441b10e38a6 116 case lora::ChannelPlan::KR920:
jortronm2 0:1441b10e38a6 117 // DR_5 : SF7 @ 125kHz
jortronm2 0:1441b10e38a6 118 radio_frequency = 922700000;
jortronm2 0:1441b10e38a6 119 radio_data_rate = lora::DR_5;
jortronm2 0:1441b10e38a6 120 radio_power = 14;
jortronm2 0:1441b10e38a6 121 break;
jortronm2 0:1441b10e38a6 122
jortronm2 0:1441b10e38a6 123 default:
jortronm2 0:1441b10e38a6 124 while (true) {
jortronm2 0:1441b10e38a6 125 logFatal("no known channel plan in use - extra configuration is needed!");
jortronm2 0:1441b10e38a6 126 wait(5);
jortronm2 0:1441b10e38a6 127 }
jortronm2 0:1441b10e38a6 128 }
jortronm2 0:1441b10e38a6 129
jortronm2 0:1441b10e38a6 130 update_peer_to_peer_config(radio_network_address, radio_network_session_key, radio_data_session_key, radio_frequency, radio_data_rate, radio_power);
jortronm2 0:1441b10e38a6 131
jortronm2 0:1441b10e38a6 132 // Save changes to configuration.
jortronm2 0:1441b10e38a6 133 logInfo("saving configuration");
jortronm2 0:1441b10e38a6 134 if (!dot->saveConfig()) {
jortronm2 0:1441b10e38a6 135 logError("failed to save configuration");
jortronm2 0:1441b10e38a6 136 }
jortronm2 0:1441b10e38a6 137
jortronm2 0:1441b10e38a6 138 // Join network if not joined.
jortronm2 0:1441b10e38a6 139 if (!dot->getNetworkJoinStatus()) {
jortronm2 0:1441b10e38a6 140 join_network();
jortronm2 0:1441b10e38a6 141 }
jortronm2 0:1441b10e38a6 142
jortronm2 0:1441b10e38a6 143 // Display configuration.
jortronm2 0:1441b10e38a6 144 display_config();
jortronm2 0:1441b10e38a6 145
jortronm2 0:1441b10e38a6 146 return 0;
jortronm2 0:1441b10e38a6 147 }
jortronm2 0:1441b10e38a6 148
jortronm2 0:1441b10e38a6 149 extern int8_t radio_sensor_transmit(struct sensor_data_raw data) {
jortronm2 0:1441b10e38a6 150 uint8_t packet_length_max, packet_seq, packets_required;
jortronm2 0:1441b10e38a6 151 uint8_t tx_buffer[sizeof(struct sensor_data_raw)];
jortronm2 0:1441b10e38a6 152 uint32_t packet_length_data, tx_buffer_size;
jortronm2 0:1441b10e38a6 153 std::vector<uint8_t> radio_packet;
jortronm2 0:1441b10e38a6 154
jortronm2 0:1441b10e38a6 155 packet_length_max = dot->getMaxPacketLength();
jortronm2 0:1441b10e38a6 156 logDebug("The maximum packet length is %i.", packet_length_max);
jortronm2 0:1441b10e38a6 157
jortronm2 0:1441b10e38a6 158 if(packet_length_max < 3) {
jortronm2 0:1441b10e38a6 159 logError("The packet length allowed by the mDot is too small (%u).", packet_length_max);
jortronm2 0:1441b10e38a6 160 return -1;
jortronm2 0:1441b10e38a6 161 }
jortronm2 0:1441b10e38a6 162
jortronm2 0:1441b10e38a6 163
jortronm2 0:1441b10e38a6 164 packet_length_data = packet_length_max - 2;
jortronm2 0:1441b10e38a6 165 tx_buffer_size = sizeof(struct sensor_data_raw);
jortronm2 0:1441b10e38a6 166 // This performs an integer division and round up operation.
jortronm2 0:1441b10e38a6 167 packets_required = (tx_buffer_size + packet_length_data - 1) / packet_length_data;
jortronm2 0:1441b10e38a6 168
jortronm2 0:1441b10e38a6 169 // Turn the sensor data into a stream of bytes.
jortronm2 0:1441b10e38a6 170 serialize_sensor_to_bytes(data, tx_buffer);
jortronm2 0:1441b10e38a6 171
jortronm2 0:1441b10e38a6 172 packet_seq = 0;
jortronm2 0:1441b10e38a6 173
jortronm2 0:1441b10e38a6 174 // For the first
jortronm2 0:1441b10e38a6 175 //radio_packet.push_back(radio_packet_current_id);
jortronm2 0:1441b10e38a6 176 //radio_packet.push_back(packet_seq);
jortronm2 0:1441b10e38a6 177 //radio_packet.push_back(packets_required);
jortronm2 0:1441b10e38a6 178
jortronm2 0:1441b10e38a6 179 for(uint32_t i = 0; i < tx_buffer_size; i++) {
jortronm2 0:1441b10e38a6 180 // Current packet finished constructing, send it and begin again.
jortronm2 0:1441b10e38a6 181 if(radio_packet.size() >= packet_length_max) {
jortronm2 0:1441b10e38a6 182 send_data(radio_packet);
jortronm2 0:1441b10e38a6 183 radio_packet.clear();
jortronm2 0:1441b10e38a6 184
jortronm2 0:1441b10e38a6 185 packet_seq++;
jortronm2 0:1441b10e38a6 186
jortronm2 0:1441b10e38a6 187 radio_packet.push_back(radio_packet_current_id);
jortronm2 0:1441b10e38a6 188 radio_packet.push_back(packet_seq);
jortronm2 0:1441b10e38a6 189 }
jortronm2 0:1441b10e38a6 190
jortronm2 0:1441b10e38a6 191 radio_packet.push_back(tx_buffer[i]);
jortronm2 0:1441b10e38a6 192 }
jortronm2 0:1441b10e38a6 193
jortronm2 0:1441b10e38a6 194 // Send the last packet. This will happen if the data is not divisible by the number of required packets.
jortronm2 0:1441b10e38a6 195 if(radio_packet.size() > 0) {
jortronm2 0:1441b10e38a6 196 send_data(radio_packet);
jortronm2 0:1441b10e38a6 197 radio_packet.clear();
jortronm2 0:1441b10e38a6 198 }
jortronm2 0:1441b10e38a6 199
jortronm2 0:1441b10e38a6 200 radio_packet_current_id++;
jortronm2 0:1441b10e38a6 201
jortronm2 0:1441b10e38a6 202 return 0;
jortronm2 0:1441b10e38a6 203 }