106 lines
2.8 KiB
Java
106 lines
2.8 KiB
Java
/*
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* Copyright © 2011 Keith Packard <keithp@keithp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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package org.altusmetrum.altoslib_14;
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import java.text.*;
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import java.util.concurrent.*;
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public class AltosEepromChunk {
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public static final int chunk_size = 256;
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public static final int per_line = 8;
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public int data[];
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public int address;
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public ParseException parse_exception = null;
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int[] ParseHex(String line) {
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String[] tokens = line.split("\\s+");
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int[] array = new int[tokens.length];
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for (int i = 0; i < tokens.length; i++)
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try {
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array[i] = Integer.parseInt(tokens[i], 16);
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} catch (NumberFormatException ne) {
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return null;
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}
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return array;
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}
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public int data(int offset) {
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return data[offset];
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}
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public int data16(int offset) {
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return data[offset] | (data[offset + 1] << 8);
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}
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public int data32(int offset) {
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return data[offset] | (data[offset + 1] << 8) |
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(data[offset+2] << 16) | (data[offset+3] << 24);
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}
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public boolean erased(int start, int len) {
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for (int i = 0; i < len; i++)
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if (data[start+i] != 0xff)
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return false;
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return true;
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}
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public boolean erased() {
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return erased(0, chunk_size);
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}
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public AltosEepromChunk(AltosLink link, int block, boolean flush)
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throws TimeoutException, InterruptedException {
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int offset;
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data = new int[chunk_size];
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address = block * chunk_size;
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if (flush)
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link.flush_input();
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link.printf("e %x\n", block);
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for (offset = 0; offset < chunk_size; offset += per_line) {
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try {
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String line = link.get_reply(5000);
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if (line == null)
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throw new TimeoutException();
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int[] values = ParseHex(line);
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if (values == null || values.length != per_line + 1)
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throw new ParseException(String.format("invalid line %s", line), 0);
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if (values[0] != offset)
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throw new ParseException(String.format("data address out of sync at 0x%x",
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address + offset), 0);
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for (int i = 0; i < per_line; i++)
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data[offset + i] = values[1 + i];
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} catch (ParseException pe) {
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for (int i = 0; i < per_line; i++)
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data[offset + i] = 0xff;
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if (parse_exception == null)
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parse_exception = pe;
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}
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}
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}
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}
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