Function parse

app/rcc/scripts/parser/js/ubx_ublox.js:188–231

* Parses a UBX message frame into the predefined array structure. * * UBX message structure: * Bytes 0-1: Sync characters (0xB5 0x62) * Byte 2: Message class * Byte 3: Message ID * Bytes 4-5: Payload length (little-endian) * Bytes 6-n: Payload * Byte n+1: Checksum A

(frame)

 * @returns {array} Array of values mapped according to messageMap
 */
function parse(frame) {
  if (frame.length < 6)
    return parsedValues;

  var msgClass     = frame[0];
  var msgId        = frame[1];
  var payloadLength = frame[2] | (frame[3] << 8);

  if (frame.length < 4 + payloadLength + 2) {
    console.error("Incomplete UBX frame");
    return parsedValues;
  }

  var payload = [];
  for (var i = 0; i < payloadLength; i++)
    payload.push(frame[4 + i]);

  var ckA = frame[4 + payloadLength];
  var ckB = frame[4 + payloadLength + 1];

  if (!validateChecksum(msgClass, msgId, payloadLength, payload, ckA, ckB)) {
    console.error("UBX checksum validation failed");
    return parsedValues;
  }

  var messageKey = "0x" + msgClass.toString(16).padStart(2, '0') +
                   "-0x" + msgId.toString(16).padStart(2, '0');

  if (!messageMap.hasOwnProperty(messageKey))
    return parsedValues;

  var config = messageMap[messageKey];

  try {
    var values = config.parser(payload);
    for (var i = 0; i < values.length && i < config.indices.length; i++)
      parsedValues[config.indices[i]] = values[i];
  }
  catch (e) {
    console.error("UBX parsing error:", e.message);
  }

  return parsedValues;
}