1 files changed, 135 insertions, 0 deletions
diff --git a/altosui/AltosTelemetryRecordRaw.java b/altosui/AltosTelemetryRecordRaw.java
new file mode 100644
index 00000000..35796a22
--- /dev/null
+++ b/altosui/AltosTelemetryRecordRaw.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright © 2011 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.lang.*;
+import java.text.*;
+import java.util.HashMap;
+
+public class AltosTelemetryRecordRaw implements AltosTelemetryRecord {
+	int[]	bytes;
+	int	serial;
+	int	tick;
+	int	type;
+
+	final static int packet_type_TM_sensor = 0x01;
+	final static int packet_type_Tm_sensor = 0x02;
+	final static int packet_type_Tn_sensor = 0x03;
+	final static int packet_type_config = 0x04;
+	final static int packet_type_GPS_location = 0x05;
+	final static int packet_type_GPS_satellites = 0x06;
+	
+	final static int PKT_APPEND_STATUS_1_CRC_OK		= (1 << 7);
+	final static int PKT_APPEND_STATUS_1_LQI_MASK		= (0x7f);
+	final static int PKT_APPEND_STATUS_1_LQI_SHIFT		= 0;
+
+	static boolean cksum(int[] bytes) {
+		int	sum = 0x5a;
+		for (int i = 1; i < bytes.length - 1; i++)
+			sum += bytes[i];
+		sum &= 0xff;
+		System.out.printf("%d bytes sum 0x%x last byte 0x%x\n",
+				  bytes.length, sum, bytes[bytes.length - 1]);
+		return sum == bytes[bytes.length - 1];
+	}
+
+	public static AltosTelemetryRecord parse (String hex) throws ParseException, AltosCRCException {
+		AltosTelemetryRecord	r;
+
+		int[] bytes;
+		try {
+			bytes = Altos.hexbytes(hex);
+		} catch (NumberFormatException ne) {
+			throw new ParseException(ne.getMessage(), 0);
+		}
+
+		/* one for length, one for checksum */
+		if (bytes[0] != bytes.length - 2)
+			throw new ParseException(String.format("invalid length %d != %d\n",
+							       bytes[0],
+							       bytes.length - 2), 0);
+		if (!cksum(bytes))
+			throw new ParseException(String.format("invalid line \"%s\"", hex), 0);
+
+		int	rssi = Altos.int8(bytes, bytes.length - 3) / 2 - 74;
+		int	status = Altos.uint8(bytes, bytes.length - 2);
+
+		System.out.printf ("rssi 0x%x = %d status 0x%x\n",
+				   Altos.uint8(bytes, bytes.length - 3),
+				   rssi, status);
+
+		if ((status & PKT_APPEND_STATUS_1_CRC_OK) == 0)
+			throw new AltosCRCException(rssi);
+
+		/* length, data ..., rssi, status, checksum -- 4 bytes extra */
+		switch (bytes.length) {
+		case Altos.ao_telemetry_split_len + 4:
+			int	type = Altos.uint8(bytes, 4 + 1);
+			switch (type) {
+			case packet_type_TM_sensor:
+			case packet_type_Tm_sensor:
+			case packet_type_Tn_sensor:
+				r = new AltosTelemetryRecordSensor(bytes);
+				break;
+			default:
+				r = new AltosTelemetryRecordRaw(bytes);
+				break;
+			}
+		case Altos.ao_telemetry_legacy_len + 4:
+			r = new AltosTelemetryRecordLegacy(bytes, rssi, status);
+			break;
+		default:
+			throw new ParseException(String.format("Invalid packet length %d", bytes.length), 0);
+		}
+		return r;
+	}
+
+	public int int8(int off) {
+		return Altos.int8(bytes, off + 1);
+	}
+
+	public int uint8(int off) {
+		return Altos.uint8(bytes, off + 1);
+	}
+
+	public int int16(int off) {
+		return Altos.int16(bytes, off + 1);
+	}
+
+	public int uint16(int off) {
+		return Altos.uint16(bytes, off + 1);
+	}
+
+	public int uint32(int off) {
+		return Altos.uint32(bytes, off + 1);
+	}
+
+	public AltosTelemetryRecordRaw(int[] in_bytes) {
+		bytes = in_bytes;
+		serial = uint16(0);
+		tick   = uint16(2);
+		type   = uint8(4);
+	}
+
+	public AltosRecord update_state(AltosRecord previous) {
+		if (previous != null)
+			return new AltosRecord(previous);
+		else
+			return new AltosRecord();
+	}
+}