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/*
* Copyright © 2017 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, either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*/
package org.altusmetrum.altoslib_13;
public abstract class AltosEepromRecord implements Comparable<AltosEepromRecord> {
AltosEeprom eeprom;
int wide_tick;
final int start;
final int length;
public final static int header_length = 4;
public int cmd() {
return eeprom.data8(start);
}
public int tick() {
return eeprom.data16(start+2);
}
public int data8(int i) {
i += start + header_length;
return eeprom.data8(i);
}
public int data16(int i) {
return ((data8(i) | (data8(i+1) << 8)) << 16) >> 16;
}
public int data24(int i) {
return data8(i) | (data8(i+1) << 8) | (data8(i+2) << 16);
}
public int data32(int i) {
return data8(i) | (data8(i+1) << 8) | (data8(i+2) << 16) | (data8(i+3) << 24);
}
public boolean empty(int s) {
for (int i = 0; i < length; i++)
if (eeprom.data8(s + i) != 0xff)
return false;
return true;
}
public boolean valid(int s) {
int ck = AltosConvert.checksum(eeprom.data, s, length);
if (ck != 0) {
++eeprom.errors;
System.out.printf("invalid checksum 0x%x at 0x%x\n", ck, s);
return false;
}
return true;
}
public boolean valid() {
return valid(start);
}
private int cmdi() {
if (cmd() == AltosLib.AO_LOG_FLIGHT)
return 0;
return 1;
}
public AltosConfigData config_data() {
return eeprom.config_data();
}
public int compareTo(AltosEepromRecord o) {
int cmd_diff = cmdi() - o.cmdi();
if (cmd_diff != 0)
return cmd_diff;
int tick_diff = wide_tick - o.wide_tick;
if (tick_diff != 0)
return tick_diff;
return start - o.start;
}
/* AltosDataProvider */
public void provide_data(AltosDataListener listener, AltosCalData cal_data) {
listener.set_tick(tick());
if (cmd() == AltosLib.AO_LOG_FLIGHT)
cal_data.set_boost_tick();
listener.set_time(cal_data.time());
/* Flush any pending GPS changes */
if (!AltosLib.is_gps_cmd(cmd())) {
AltosGPS gps = listener.temp_gps();
if (gps != null)
listener.set_gps(gps);
}
}
public int next_start() {
int s = start + length;
while (s + length <= eeprom.data.size()) {
if (!empty(s) && valid(s))
return s;
s += length;
}
return -1;
}
public abstract AltosEepromRecord next();
public AltosEepromRecord(AltosEeprom eeprom, int start, int length) {
this.eeprom = eeprom;
this.start = start;
this.length = length;
}
}
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