+++ /dev/null
-/*
- * Copyright © 2010 Keith Packard <keithp@keithp.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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 General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-package altosui;
-import java.io.*;
-
-public class AltosRomconfig {
- public boolean valid;
- public int version;
- public int check;
- public int serial_number;
- public int radio_calibration;
-
- static int get_int(byte[] bytes, int start, int len) {
- int v = 0;
- int o = 0;
- while (len > 0) {
- v = v | ((((int) bytes[start]) & 0xff) << o);
- start++;
- len--;
- o += 8;
- }
- return v;
- }
-
- static void put_int(int value, byte[] bytes, int start, int len) {
- while (len > 0) {
- bytes[start] = (byte) (value & 0xff);
- start++;
- len--;
- value >>= 8;
- }
- }
-
- static void put_string(String value, byte[] bytes, int start) {
- for (int i = 0; i < value.length(); i++)
- bytes[start + i] = (byte) value.charAt(i);
- }
-
- static final int AO_USB_DESC_STRING = 3;
-
- static void put_usb_serial(int value, byte[] bytes, int start) {
- int offset = start + 0xa;
- int string_num = 0;
-
- while (offset < bytes.length && bytes[offset] != 0) {
- if (bytes[offset + 1] == AO_USB_DESC_STRING) {
- ++string_num;
- if (string_num == 4)
- break;
- }
- offset += ((int) bytes[offset]) & 0xff;
- }
- if (offset >= bytes.length || bytes[offset] == 0)
- return;
- int len = ((((int) bytes[offset]) & 0xff) - 2) / 2;
- String fmt = String.format("%%0%dd", len);
-
- String s = String.format(fmt, value);
- if (s.length() != len) {
- System.out.printf("weird usb length issue %s isn't %d\n",
- s, len);
- return;
- }
- for (int i = 0; i < len; i++) {
- bytes[offset + 2 + i*2] = (byte) s.charAt(i);
- bytes[offset + 2 + i*2+1] = 0;
- }
- }
-
- public AltosRomconfig(byte[] bytes, int offset) {
- version = get_int(bytes, offset + 0, 2);
- check = get_int(bytes, offset + 2, 2);
- if (check == (~version & 0xffff)) {
- switch (version) {
- case 2:
- case 1:
- serial_number = get_int(bytes, offset + 4, 2);
- radio_calibration = get_int(bytes, offset + 6, 4);
- valid = true;
- break;
- }
- }
- }
-
- public AltosRomconfig(AltosHexfile hexfile) {
- this(hexfile.data, 0xa0 - hexfile.address);
- }
-
- public void write(byte[] bytes, int offset) throws IOException {
- if (!valid)
- throw new IOException("rom configuration invalid");
-
- if (offset < 0 || bytes.length < offset + 10)
- throw new IOException("image cannot contain rom config");
-
- AltosRomconfig existing = new AltosRomconfig(bytes, offset);
- if (!existing.valid)
- throw new IOException("image does not contain existing rom config");
-
- switch (existing.version) {
- case 2:
- put_usb_serial(serial_number, bytes, offset);
- case 1:
- put_int(serial_number, bytes, offset + 4, 2);
- put_int(radio_calibration, bytes, offset + 6, 4);
- break;
- }
- }
-
- public void write (AltosHexfile hexfile) throws IOException {
- write(hexfile.data, 0xa0 - hexfile.address);
- AltosRomconfig check = new AltosRomconfig(hexfile);
- if (!check.valid())
- throw new IOException("writing new rom config failed\n");
- }
-
- public AltosRomconfig(int in_serial_number, int in_radio_calibration) {
- valid = true;
- version = 1;
- check = (~version & 0xffff);
- serial_number = in_serial_number;
- radio_calibration = in_radio_calibration;
- }
-
- public boolean valid() {
- return valid && serial_number != 0;
- }
-
- public AltosRomconfig() {
- valid = false;
- }
-}