diff options
Diffstat (limited to 'ebus-scala/src')
| -rw-r--r-- | ebus-scala/src/App.scala | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/ebus-scala/src/App.scala b/ebus-scala/src/App.scala deleted file mode 100644 index 8bd27e9..0000000 --- a/ebus-scala/src/App.scala +++ /dev/null @@ -1,194 +0,0 @@ -import Stream._ -import java.io.{ InputStream, EOFException } -import java.net.{ InetAddress, InetSocketAddress, Socket } - -class EbusDefinition(val ebusXmlFile: String) { - import scala.xml.XML - import scala.xml.NodeSeq - - val xml = XML.loadFile(ebusXmlFile) - - def packetFromCommandId(primaryCommand: Char, secondaryCommand: Char): NodeSeq = { - val packet = (xml \ "packets" \ "packet").filter(n => - n.attribute("primary").get.text.toInt == primaryCommand && - n.attribute("secondary").get.text.toInt == secondaryCommand) - packet - } -} - -object EbusPacket { - /** - * Wird von {@link EbusReader} mit einer Streamposition aufgerufen. - * Ausgehend von dieser Position wird versucht ein Paket aufzubauen, - * und anschliesend die Checksumme geprüft. - * Im Erfolgsfall wird eine EbusPacket-Instanz als Option zurückgegen, - * sonst None - */ - def apply(stream: Stream[Int]): Option[EbusPacket] = { - try { - var rawLength = 0 - val source = stream.apply(0).toChar - val destination = stream.apply(1).toChar - val primaryCommand = stream.apply(2).toChar - val secondaryCommand = stream.apply(3).toChar - val payloadLength = stream.apply(4).toChar - rawLength = 5 - - var payload = new Array[Char](payloadLength) - for (i <- 0 until payloadLength) { - var it = stream.apply(rawLength).toChar - rawLength += 1 - // Handle escape sequences - // "eBUS Spezifikation Physikalische Schicht – OSI 1 - // Verbindungsschicht – OSI 2 V.1.3.1" auf Seite 8 - if (it == 0xa9.toChar) { - val itNext = stream.apply(rawLength).toChar - rawLength += 1 - if (itNext == 0x00.toChar) { - it = 0xa9.toChar - } else if (itNext == 0x01.toChar) { - it = 0xaa.toChar - } else { - println("Ignore escape sequence 0xa9 0x%02x".format(itNext)) - rawLength -= 1 - } - } - payload.update(i, it) - } - val crc = stream.apply(5 + payloadLength).toChar - rawLength += 1 - - return Some(new EbusPacket(source, destination, - primaryCommand, secondaryCommand, - payloadLength, payload, crc, rawLength)) - } catch { - case exc: IndexOutOfBoundsException => { - println(exc.toString) - exc.printStackTrace - return None - } - } - } -} - -class EbusPacket(val source: Char, - val destination: Char, - val primaryCommand: Char, - val secondaryCommand: Char, - val payloadLength: Char, - val payload: Array[Char], - val crc: Char, - val rawLength: Int) { - val length = 6 + payload.size - - override def toString: String = { - val p = if (payload.size == 0) - "" - else - payload.map(a => "%02x".format(a.toInt)). - reduceLeft((a: Any, b: String) => a + " " + b) - - "Ebus: d=%02x pC=%02x sC=%02x pL=%02x crc=%02x p=%s".format( - destination.toInt, primaryCommand.toInt, secondaryCommand.toInt, payloadLength.toInt, - crc.toInt, p.toString) - } - - /** - * Die CRC-Prüfsumme wird vom jeweiligen Sender über der expandierten Bytesendefolge mit dem - * Generatorpolynom X8 +X7 + X4 + X3 + X +1 gebildet und als letztes Byte der Nachricht, - * sofern notwendig, sogar expandiert gesendet. - * - * Generatorpol. 11001101 - */ - private def calcCrc: Char = { - val sum = destination + primaryCommand + secondaryCommand + payloadLength + - payload.reduce((a, b) => ((a.intValue + b.intValue) % 256).toChar) - val crc = 1 + 1 - 1 - } -} - -object EbusReader { - def apply(streamI: Stream[Int]): EbusPacket = { - var stream = streamI - while (true) { - // Überspringe Synchronisationszeichen - stream = stream.dropWhile(v => v.toChar == 0xaa.toChar) - - EbusPacket(stream) match { - case Some(packet) => { - stream = stream.drop(packet.rawLength) - return packet - } - case None => { - // Es konnte kein Paket eingelesen werden - // verschieben die Anfangsposition um ein Byte - stream = stream.drop(1) - println("skip 1 byte") - } - } - } - null - } -} - -object App { - val ebusDefinition = new EbusDefinition("/home/yvesf/vcs/ebus/ebus/ebus-xml/ebus.xml") - var source: InputStream = null - - def main(args: Array[String]): Unit = { - if (args.size == 1) { - println("Use stdin as source") - source = System.in - } else if (args.size == 2) { - val addr = InetAddress.getByName(args(0)) - val sockAddr = new InetSocketAddress(addr, args(1).toInt) - val s = new Socket() - s.connect(sockAddr) - println("Connected to %s %d".format(args(0), args(1).toInt)) - source = s.getInputStream - } else if (args.size == 3 && args(0) == "dump") { - val addr = InetAddress.getByName(args(1)) - val sockAddr = new InetSocketAddress(addr, args(2).toInt) - val s = new Socket() - s.connect(sockAddr) - System.err.println("Connected to %s %d".format(args(1), args(2).toInt)) - while (true) { - val v = s.getInputStream.read - if (v == -1) - System.exit(1) - print(v.toChar) - } - } else { - println("Missing Arguments") - println(" Read from stdin: -") - println(" Read from TCP: HOST PORT") - println(" Read from TCP and dump to stdout: dump HOST PORT") - System.exit(1) - } - - val read = (() => { - val value = source.read - if (value == -1) - throw new EOFException("End of File reached (read returned -1)") - value - }) - val stream: Stream[Int] = Stream.continually(read()) - - while (true) { - EbusReader(stream) match { - case x: EbusPacket => { - println(x) - val p = ebusDefinition.packetFromCommandId(x.primaryCommand, x.secondaryCommand) - if (p.size == 1) - println(p(0).attribute("name").get) - } - case null => { - println("null") - } - } - } - println("exiting") - source.close - } -} |