204 lines
7.8 KiB
C++
204 lines
7.8 KiB
C++
#include "icsneo/communication/decoder.h"
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#include "icsneo/communication/communication.h"
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#include "icsneo/communication/message/serialnumbermessage.h"
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#include "icsneo/communication/message/resetstatusmessage.h"
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#include "icsneo/communication/message/readsettingsmessage.h"
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#include "icsneo/communication/command.h"
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#include "icsneo/device/device.h"
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#include <iostream>
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using namespace icsneo;
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uint64_t Decoder::GetUInt64FromLEBytes(uint8_t* bytes) {
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uint64_t ret = 0;
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for(int i = 0; i < 8; i++)
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ret |= (bytes[i] << (i * 8));
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return ret;
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}
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bool Decoder::decode(std::shared_ptr<Message>& result, const std::shared_ptr<Packet>& packet) {
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switch(packet->network.getType()) {
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case Network::Type::CAN: {
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if(packet->data.size() < 24)
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return false;
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HardwareCANPacket* data = (HardwareCANPacket*)packet->data.data();
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auto msg = std::make_shared<CANMessage>();
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msg->network = packet->network;
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// Timestamp calculation
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msg->timestamp = data->timestamp.TS * 25; // Timestamps are in 25ns increments since 1/1/2007 GMT 00:00:00.0000
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// Arb ID
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if(data->header.IDE) { // Extended 29-bit ID
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msg->arbid = (data->header.SID & 0x7ff) << 18;
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msg->arbid |= (data->eid.EID & 0xfff) << 6;
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msg->arbid |= (data->dlc.EID2 & 0x3f);
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msg->isExtended = true;
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} else { // Standard 11-bit ID
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msg->arbid = data->header.SID;
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}
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// DLC
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uint8_t length = data->dlc.DLC;
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msg->dlcOnWire = length; // This will hold the real DLC on wire 0x0 - 0xF
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if(data->header.EDL && data->timestamp.IsExtended) { // CAN FD
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msg->isCANFD = true;
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msg->baudrateSwitch = data->header.BRS; // CAN FD Baudrate Switch
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if(length > 8) {
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switch(length) { // CAN FD Length Decoding
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case 0x9:
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length = 12;
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break;
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case 0xa:
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length = 16;
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break;
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case 0xb:
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length = 20;
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break;
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case 0xc:
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length = 24;
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break;
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case 0xd:
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length = 32;
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break;
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case 0xe:
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length = 48;
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break;
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case 0xf:
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length = 64;
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break;
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default:
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return false;
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}
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}
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} else if(length > 8) { // This is a standard CAN frame with a length of more than 8
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// Yes, this is possible. On the wire, the length field is a nibble, and we do want to return an accurate value
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// We don't want to overread our buffer, though, so make sure we cap the length
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length = 8;
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}
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// Data
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// The first 8 bytes are always in the standard place
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if((data->dlc.RTR && data->header.IDE) || (!data->header.IDE && data->header.SRR)) { // Remote Request Frame
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msg->data.resize(length); // This data will be all zeros, but the length will be set
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msg->isRemote = true;
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} else {
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msg->data.reserve(length);
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msg->data.insert(msg->data.end(), data->data, data->data + (length > 8 ? 8 : length));
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if(length > 8) { // If there are more than 8 bytes, they come at the end of the message
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// Messages with extra data are formatted as message, then uint16_t netid, then uint16_t length, then extra data
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uint8_t* extraDataStart = packet->data.data() + sizeof(HardwareCANPacket) + 2 + 2;
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msg->data.insert(msg->data.end(), extraDataStart, extraDataStart + (length - 8));
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}
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}
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result = msg;
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return true;
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}
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case Network::Type::Internal: {
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switch(packet->network.getNetID()) {
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case Network::NetID::Reset_Status: {
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if(packet->data.size() < sizeof(HardwareResetStatusPacket))
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return false;
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HardwareResetStatusPacket* data = (HardwareResetStatusPacket*)packet->data.data();
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auto msg = std::make_shared<ResetStatusMessage>();
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msg->network = packet->network;
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msg->mainLoopTime = data->main_loop_time_25ns * 25;
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msg->maxMainLoopTime = data->max_main_loop_time_25ns * 25;
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msg->busVoltage = data->busVoltage;
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msg->deviceTemperature = data->deviceTemperature;
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msg->justReset = data->status.just_reset;
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msg->comEnabled = data->status.com_enabled;
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msg->cmRunning = data->status.cm_is_running;
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msg->cmChecksumFailed = data->status.cm_checksum_failed;
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msg->cmLicenseFailed = data->status.cm_license_failed;
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msg->cmVersionMismatch = data->status.cm_version_mismatch;
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msg->cmBootOff = data->status.cm_boot_off;
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msg->hardwareFailure = data->status.hardware_failure;
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msg->usbComEnabled = data->status.usbComEnabled;
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msg->linuxComEnabled = data->status.linuxComEnabled;
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msg->cmTooBig = data->status.cm_too_big;
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msg->hidUsbState = data->status.hidUsbState;
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msg->fpgaUsbState = data->status.fpgaUsbState;
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result = msg;
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return true;
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}
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default:
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break;//return false;
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}
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}
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default:
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switch(packet->network.getNetID()) {
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case Network::NetID::Main51: {
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switch((Command)packet->data[0]) {
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case Command::RequestSerialNumber: {
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auto msg = std::make_shared<SerialNumberMessage>();
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msg->network = packet->network;
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uint64_t serial = GetUInt64FromLEBytes(packet->data.data() + 1);
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// The device sends 64-bits of serial number, but we never use more than 32-bits.
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msg->deviceSerial = Device::SerialNumToString((uint32_t)serial);
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msg->hasMacAddress = packet->data.size() >= 15;
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if(msg->hasMacAddress)
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memcpy(msg->macAddress, packet->data.data() + 9, sizeof(msg->macAddress));
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msg->hasPCBSerial = packet->data.size() >= 31;
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if(msg->hasPCBSerial)
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memcpy(msg->pcbSerial, packet->data.data() + 15, sizeof(msg->pcbSerial));
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result = msg;
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return true;
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}
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default:
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auto msg = std::make_shared<Main51Message>();
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msg->network = packet->network;
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msg->command = Command(packet->data[0]);
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msg->data.insert(msg->data.begin(), packet->data.begin() + 1, packet->data.end());
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result = msg;
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return true;
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}
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}
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case Network::NetID::RED_OLDFORMAT: {
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/* So-called "old format" messages are a "new style, long format" wrapper around the old short messages.
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* They consist of a 16-bit LE length first, then the 8-bit length and netid combo byte, then the payload
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* with no checksum. The upper-nibble length of the combo byte should be ignored completely, using the
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* length from the first two bytes in it's place. Ideally, we never actually send the oldformat messages
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* out to the rest of the application as they can recursively get decoded to another message type here.
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* Feed the result back into the decoder in case we do something special with the resultant netid.
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*/
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uint16_t length = packet->data[0] | (packet->data[1] << 8);
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packet->network = Network(packet->data[2] & 0xF);
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packet->data.erase(packet->data.begin(), packet->data.begin() + 3);
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if(packet->data.size() != length)
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packet->data.resize(length);
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return decode(result, packet);
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}
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case Network::NetID::ReadSettings: {
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auto msg = std::make_shared<ReadSettingsMessage>();
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msg->network = packet->network;
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msg->response = ReadSettingsMessage::Response(packet->data[0]);
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if(msg->response == ReadSettingsMessage::Response::OK) {
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// The global settings structure is the payload of the message in this case
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msg->data.insert(msg->data.begin(), packet->data.begin() + 10, packet->data.end());
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uint16_t resp_len = msg->data[8] | (msg->data[9] << 8);
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if(msg->data.size() - 1 == resp_len) // There is a padding byte at the end
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msg->data.pop_back();
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result = msg;
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return true;
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}
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// We did not get a successful response, so the payload is all of the data
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msg->data.insert(msg->data.begin(), packet->data.begin(), packet->data.end());
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result = msg;
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return true;
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}
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}
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}
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// For the moment other types of messages will automatically be decoded as raw messages
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auto msg = std::make_shared<Message>();
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msg->network = packet->network;
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msg->data = packet->data;
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result = msg;
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return true;
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} |