iot-dc3-master.zip

/* * Copyright 2022 Pnoker All Rights Reserved * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* Part of Libnodave, a free communication libray for Siemens S7 (C) Thomas Hergenhahn (thomas.hergenhahn@web.de) 2005. Libnodave is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. Libnodave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Library General Public License along with this; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ package io.github.pnoker.driver.api.impl.nodave; import io.github.pnoker.driver.api.DaveArea; /** * @author Thomas Rudin */ public final class PDU { /** * known function codes */ public final static byte FUNC_READ = 4; public final static byte FUNC_WRITE = 5; public int data; int dlen; int error; int header; // the position of the header; int hlen; byte[] mem; public int param; // the position of the parameters; public int plen; public int udata; public int udlen; /** * set up the PDU information */ public PDU(final byte[] mem, final int pos) { this.mem = mem; this.header = pos; } public int addBitVarToReadRequest(final int area, final int DBnum, final int start, final int len) { final byte pa[] = {0x12, 0x0a, 0x10, 0x01, /* single bits */ 0x00, 0x1A, /* insert length in bytes here */ 0x00, 0x0B, /* insert DB number here */ (byte) 0x84, /* change this to real area code */ 0x00, 0x00, (byte) 0xC0 /* insert start address in bits */ }; Nodave.setUSBEWord(pa, 4, len); Nodave.setUSBEWord(pa, 6, DBnum); Nodave.setUSBELong(pa, 8, start); Nodave.setUSByte(pa, 8, area); this.mem[this.param + 1]++; System.arraycopy(pa, 0, this.mem, this.param + this.plen, pa.length); this.plen += pa.length; Nodave.setUSBEWord(this.mem, this.header + 6, this.plen); return 0; } public void addBitVarToWriteRequest(final DaveArea area, final int DBnum, final int start, final int byteCount, final byte[] buffer) { final byte da[] = {0, 3, 0, 0,}; final byte pa[] = {0x12, 0x0a, 0x10, 0x01, /* single bit */ 0, 0, /* insert length in bytes here */ 0, 0, /* insert DB number here */ 0, /* change this to real area code */ 0, 0, 0 /* insert start address in bits */ }; if ((area == DaveArea.TIMER) || (area == DaveArea.COUNTER) || (area == DaveArea.TIMER200) || (area == DaveArea.COUNTER200)) { pa[3] = (byte) area.getCode(); pa[4] = (byte) (((byteCount + 1) / 2) / 0x100); pa[5] = (byte) (((byteCount + 1) / 2) & 0xff); } else if ((area == DaveArea.ANALOGINPUTS200) || (area == DaveArea.ANALOGOUTPUTS200)) { pa[3] = 4; pa[4] = (byte) (((byteCount + 1) / 2) / 0x100); pa[5] = (byte) (((byteCount + 1) / 2) & 0xff); } else { pa[4] = (byte) (byteCount / 0x100); pa[5] = (byte) (byteCount & 0xff); } pa[6] = (byte) (DBnum / 256); pa[7] = (byte) (DBnum & 0xff); pa[8] = (byte) area.getCode(); pa[11] = (byte) (start & 0xff); pa[10] = (byte) ((start / 0x100) & 0xff); pa[9] = (byte) (start / 0x10000); if ((this.dlen % 2) != 0) { this.addData(da, 1); } this.mem[this.param + 1]++; if (this.dlen > 0) { final byte[] saveData = new byte[this.dlen]; System.arraycopy(this.mem, this.data, saveData, 0, this.dlen); System.arraycopy(saveData, 0, this.mem, this.data + pa.length, this.dlen); } System.arraycopy(pa, 0, this.mem, this.param + this.plen, pa.length); this.plen += pa.length; Nodave.setUSBEWord(this.mem, this.header + 6, this.plen); this.data = this.param + this.plen; this.addData(da); this.addValue(buffer); } /** * Add data after parameters, set dlen as needed. Needs valid header and * parameters */ void addData(final byte[] newData) { final int appPos = this.data + this.dlen; // append to this position this.dlen += newData.length; System.arraycopy(newData, 0, this.mem, appPos, newData.length); Nodave.setUSBEWord(this.mem, this.header + 8, this.dlen); } /** * Add len bytes of len after parameters from a maybe longer block of bytes. * Set dlen as needed. Needs valid header and parameters */ public void addData(final byte[] newData, final int len) { final int appPos = this.data + this.dlen; // append to this position this.dlen += len; System.arraycopy(newData, 0, this.mem, appPos, len); Nodave.setUSBEWord(this.mem, this.header + 8, this.dlen); } public void addParam(final byte[] pa) { this.plen = pa.length; System.arraycopy(pa, 0, this.mem, this.param, this.plen); Nodave.setUSBEWord(this.mem, this.header + 6, this.plen); // mem[header + 6] = (byte) (pa.length / 256); // mem[header + 7] = (byte) (pa.length % 256); this.data = this.param + this.plen; this.dlen = 0; } /* * add data in user data. Add a user data header, if not yet present. */ public void addUserData(final byte[] da) { final byte udh[] = {(byte) 0xff, 9, 0, 0}; if (this.dlen == 0) { this.addData(udh); } this.addValue(da); } /** * Add values after value header in data, adjust dlen and data count. Needs * valid header,parameters,data,dlen */ void addValue(final byte[] values) { int valCount = (0x100 * this.mem[this.data + 2]) + this.mem[this.data + 3]; if (this.mem[this.data + 1] == 4) { // bit data, length is in bits valCount += 8 * values.length; } else if (this.mem[this.data + 1] == 9) { // byte data, length is in // bytes valCount += values.length; } else { // XXX } if (this.udata == 0) { this.udata = this.data + 4; } this.udlen += values.length; Nodave.setUSBEWord(this.mem, this.data + 2, valCount); this.addData(values); } public int addVarToReadRequest(final DaveArea area, final int DBnum, int start, final int len) { final byte[] pa = {0x12, 0x0a, 0x10, 0x02, /* 1=single bit, 2=byte, 4=word */ 0x00, 0x1A, /* length in bytes */ 0x00, 0x0B, /* DB number */ (byte) 0x84, // * area code */ 0x00, 0x00, (byte) 0xC0 /* start address in bits */ }; if ((area == DaveArea.ANALOGINPUTS200) || (area == DaveArea.ANALOGOUTPUTS200)) { pa[3] = 4; start *= 8; /* bits */ } else if ((area == DaveArea