Wireless interface using LoRa technology
Dependencies: AlohaTransceiver RingBuffer SX1276Lib SerialInterfaceProtocol mbed L3PDU
main.cpp
- Committer:
- rba90
- Date:
- 2016-08-23
- Revision:
- 18:f37e567f0497
- Parent:
- 16:ab2d9341997a
- Child:
- 19:6a59fb0ee921
File content as of revision 18:f37e567f0497:
#include "mbed.h" #include "AlohaTransceiver.h" #include "CommandPacket.h" #include "SerialInterfaceProtocol.h" #include "AlohaFrame.h" #include "ControlPacket.h" #include "DataBlockPacket.h" Serial pc(USBTX, USBRX); // sip uses two buffer queues CircularBuffer<uint8_t> SerialInputBuffer; CircularBuffer<uint8_t> SerialOutputBuffer; SerialInterfaceProtocol SIP(&SerialInputBuffer, &SerialOutputBuffer); // aloha transceiver AlohaTransceiver aloha(DEVICE_ID); AlohaFrame txFrame; void serialInterruptHandler() { // Note: you need to actually read from the serial to clear the RX interrupt int c = pc.getc(); // add to buffer if (SerialInputBuffer.isLocked()) { printf("Mutex Locked\r\n"); } else { SerialInputBuffer.enqueue((uint8_t) c); } } int toggleChecksum(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length) { // one payload if (payload_length != 1) { sprintf((char *) response, "Wrong Payload Length\r\n"); *response_length = 22; return 1; } if ((bool) payload[0]) { SIP.enableChecksum(); } else { SIP.disableChecksum(); } return 0; } /* * Format: * < : start flag * 02 : command * xx : length * xx: : 00: get, 01: set * xx : index for parameters * ... * ff :checksum (not currently in used) * > :end flag */ int configureRadio(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length) { // read settings from radio #if USE_MODEM_LORA == 1 AlohaTransceiver::LoRaSettings_t *settings = aloha.getSettings(); #elif USE_MODEM_FSK == 1 AlohaTransceiver::FskSettings_t *settings = aloha.getSettings(); #else #error "Please define a modem in the compiler options." #endif if (payload_length < 2) { sprintf((char *) response, "Wrong Payload Length\r\n"); *response_length = 22; return 1; } // true is set, false is get bool isSet = (bool) payload[0]; uint8_t idx = payload[1]; switch(idx) { case 0x00: // Power { if (isSet) { int8_t Power = (int8_t) payload[2]; settings->Power = Power; return 0; } else { response[0] = (uint8_t) settings->Power; *response_length = 1; return 0; } } case 0x01: // Bandwidth { if (isSet) { uint32_t Bandwidth = (payload[5]) | (payload[4] << 8) | (payload[3] << 16) | (payload[2] << 24); settings->Bandwidth = Bandwidth; return 0; } else { response[3] = (uint8_t) (settings->Bandwidth); response[2] = (uint8_t) (settings->Bandwidth >> 8); response[1] = (uint8_t) (settings->Bandwidth >> 16); response[0] = (uint8_t) (settings->Bandwidth >> 24); *response_length = 4; return 0; } } case 0x02: // Datarate, AKA Spreading Factor { if (isSet) { uint32_t Datarate = (payload[5]) | (payload[4] << 8) | (payload[3] << 16) | (payload[2] << 24); settings->Datarate = Datarate; return 0; } else { response[3] = (uint8_t) (settings->Datarate); response[2] = (uint8_t) (settings->Datarate >> 8); response[1] = (uint8_t) (settings->Datarate >> 16); response[0] = (uint8_t) (settings->Datarate >> 24); *response_length = 4; return 0; } } case 0x03: // Coderate { if (isSet) { uint8_t Coderate = payload[2]; settings->Coderate = Coderate; return 0; } else { response[0] = (uint8_t) settings->Coderate; *response_length = 1; return 0; } } case 0x04: //Preamble Length { if (isSet) { uint16_t PreambleLen = payload[3] | (payload[2] << 8); settings->PreambleLen = PreambleLen; return 0; } else { response[1] = (uint8_t) (settings->PreambleLen); response[0] = (uint8_t)(settings->PreambleLen >> 8); *response_length = 2; return 0; } } case 0x05: //Symbol Timeout { if (isSet) { uint16_t SymbolTimeout = payload[3] | (payload[2] << 8); settings->SymbolTimeout = SymbolTimeout; return 0; } else { response[1] = (uint8_t) (settings->SymbolTimeout); response[0] = (uint8_t) (settings->SymbolTimeout >> 8); *response_length = 2; return 0; } } case 0x06: //FixLen { if (isSet) { bool FixLen = payload[2]; settings->FixLen = FixLen; return 0; } else { response[0] = (bool) (settings->SymbolTimeout); *response_length = 1; return 0; } } case 0x07: //PayloadLen { if (isSet) { uint8_t PayloadLen = payload[2]; settings->PayloadLen = PayloadLen; return 0; } else { response[0] = (uint8_t) (settings->PayloadLen); return 0; } } case 0x08: //CrcOn { if (isSet) { bool CrcOn = payload[2]; settings->CrcOn = CrcOn; return 0; } else { response[0] = (bool) (settings->CrcOn); return 0; } } case 0x09: //FreqHopOn { if (isSet) { bool FreqHopOn = payload[2]; settings->FreqHopOn = FreqHopOn; return 0; } else { response[0] = (bool) (settings->FreqHopOn); return 0; } } case 0x0A: //HopPeriod { if (isSet) { uint8_t HopPeriod = payload[2]; settings->HopPeriod = HopPeriod; return 0; } else { response[0] = (uint8_t) (settings->HopPeriod); return 0; } } case 0x0B: //IqInverted { if (isSet) { bool IqInverted = payload[2]; settings->IqInverted = IqInverted; return 0; } else { response[0] = (bool) (settings->IqInverted); return 0; } } case 0x0C: //RxContinuous { if(isSet) { bool RxContinuous = payload[2]; settings->RxContinuous = RxContinuous; return 0; } else { response[0] = (bool) (settings->RxContinuous); return 0; } } case 0x0D: //TxTimeout { if (isSet) { uint32_t TxTimeout = (payload[5]) | (payload[4] << 8) | (payload[3] << 16) | (payload[2] << 24); settings->TxTimeout = TxTimeout; return 0; } else { response[3] = (uint8_t) (settings->TxTimeout); response[2] = (uint8_t) (settings->TxTimeout >> 8); response[1] = (uint8_t) (settings->TxTimeout >> 16); response[0] = (uint8_t) (settings->TxTimeout >> 24); *response_length = 4; return 0; } } default: { break; } //case } return 0; } int radioUpdateSettings(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length) { aloha.updateSettings(); return 0; } /* * Format: * < : start flag * 04 : command * 02 : length (2 bytes in this case) * 00/01 : query for temperature or door sensor * xx : node to query * ff : checksum (not currently in used) * > : end flag */ int querySensors(uint8_t *payload, uint8_t payload_length, uint8_t *response, uint8_t *response_length) { // check with payloads if (payload_length != 2) { sprintf((char *) response, "Wrong Payload Length"); *response_length = 20; return 1; } // decode the user message uint8_t sensor_type = payload[0]; uint8_t node_id = payload[1]; // create a command packet ControlPacket packet; // sequence id is not in used in this case packet.setSequenceID(0x0); // set source id as current device id packet.setSourceID(aloha.getDeviceID()); // set destination id as node id packet.setDestinationID(node_id); // set command as query (00 in this case) packet.setCommand(0x00); // store sensor type in data block 0 packet.setData(0, sensor_type); // generate crc packet.generateCrc(); // create buffer for transmission uint8_t buffer[8]; memset(buffer, 0x0, sizeof(buffer)); // copy bytes into buffer packet.serialize(buffer); // send to aloha transceiver aloha.send(buffer, 8, node_id); return 0; } void AlohaDataPacketHandler(uint8_t *payload, uint8_t payload_length, uint8_t src_addr) { // try to decode packet BasicPacket packet(payload); // verify crc // skip this for now // process the packet based on different feature id BasicPacket::L3Fid_t fid = (BasicPacket::L3Fid_t) packet.getFid(); // we don't care about the type conversion. just create a new one. switch (fid) { case BasicPacket::L3ControlPacket: { ControlPacket controlPacket(payload); // currently the base station do not respond to any control packet break; } case BasicPacket::L3DataBlockPacket: { DataBlockPacket dataBlockPacket(payload); uint8_t sensor_type = dataBlockPacket.getSourceType(); switch(sensor_type) { case 0x0: // temperature sensor { uint8_t payload[3]; // copy sensor type payload[0] = 0x00; // assume 0x00 is temperature sensor // copy sensor data payload[1] = src_addr; // assume we only use one byte // copy address of source node payload[2] = dataBlockPacket.getData(0); // make response SIP.respond(0xf0, payload, 3); break; } case 0x1: // door sensor { uint8_t payload[3]; // copy sensor type payload[0] = 0x01; // copy sensor data payload[1] = src_addr; // copy address of source node payload[2] = dataBlockPacket.getData(0); // make response SIP.respond(0xf0, payload, 3); break; } default: break; } // do something break; } default: break; } } int main() { // initialize radio module aloha.boardInit(); aloha.updateSettings(); aloha.enable(); // attach serial interrupt handler pc.attach(&serialInterruptHandler); // register callback functions for SIP SIP.registerCommand(0x00, toggleChecksum); SIP.registerCommand(0x01, NULL); // send message is not available for the base station SIP.registerCommand(0x02, configureRadio); SIP.registerCommand(0x03, radioUpdateSettings); SIP.registerCommand(0x04, querySensors); // register callback functions for aloha transceiver aloha.registerType(AlohaFrame::Aloha_Data, AlohaDataPacketHandler); while(1) { SIP.poll(); aloha.poll(); while (SerialOutputBuffer.getCounter() > 0) { uint8_t ch; ch = SerialOutputBuffer.dequeue(); pc.putc(ch); } } }