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import dongfang.mkt.comm.FrameQueue;
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import dongfang.mkt.comm.FrameQueue;
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import dongfang.mkt.comm.MKConnection;
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import dongfang.mkt.comm.MKConnection;
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import dongfang.mkt.comm.serial.RXTXSerialPort;
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import dongfang.mkt.comm.serial.RXTXSerialPort;
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import dongfang.mkt.frames.RequestFrame;
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import dongfang.mkt.frames.RequestFrame;
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import dongfang.mkt.frames.VariablesRequestFrame;
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import dongfang.mkt.frames.ReadVariablesRequestFrame;
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import dongfang.mkt.frames.VariablesResponseFrame;
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import dongfang.mkt.frames.ReadVariablesResponseFrame;
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public class VariablesReader {
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public class VariablesReader {
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        private static int[] readVariables(String portIdentifier) throws IOException {
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        private static int[] readVariables(String portIdentifier) throws IOException {
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                MKConnection port =  new RXTXSerialPort();
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                MKConnection port =  new RXTXSerialPort();
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                port.init(portIdentifier);
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                port.init(portIdentifier);
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                FrameQueue q = new FrameQueue(port);
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                FrameQueue q = new FrameQueue(port);
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                int[] variables = null;
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                int[] variables = null;
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                VariablesRequestFrame frame = new VariablesRequestFrame(RequestFrame.FC_ADDRESS);
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                ReadVariablesRequestFrame frame = new ReadVariablesRequestFrame(RequestFrame.FC_ADDRESS);
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                q.sendRequest(frame);
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                q.sendRequest(frame);
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                VariablesResponseFrame r = (VariablesResponseFrame) q.getResponseFor(frame, 5000);
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                ReadVariablesResponseFrame r = (ReadVariablesResponseFrame) q.getResponseFor(frame, 5000);
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                if (r == null) {
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                if (r == null) {
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                        System.err.println("ERROR. Timeout waiting for response.");
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                        System.err.println("ERROR. Timeout waiting for response.");