altosui: Mark empty eeprom records 'invalid', don't generate exception

When reading empty eeprom records, mark them as 'invalid', but don't
generate an exception as it's normal to read these at the end of the
flight log.

Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit 7ca2cf1b7e03b8453b45b45e313a33ad65da9ad5)

diff --git a/altosui/AltosEepromRecord.java b/altosui/AltosEepromRecord.java
index 584a04b7c6c053e9a261f1368a603bbb1790c844..e5196c50039a69434d36bd661f612ad50bb3ae08 100644 (file)
--- a/altosui/AltosEepromRecord.java
+++ b/altosui/AltosEepromRecord.java
@@ -72,15 +72,24 @@ public class AltosEepromRecord {
                if (values[0] != (addr & 0xff))
                        throw new ParseException(String.format("data address out of sync at 0x%x",
                                                               addr), 0);
-               if (checksum(values) != 0)
-                       throw new ParseException(String.format("invalid checksum at 0x%x", addr), 0);
-
+               int i;
+               for (i = 1; i < values.length; i++)
+                       if (values[i] != 0xff)
+                               break;
                cmd = values[1];
+               tick_valid = true;
+               if (i != values.length) {
+                       if (checksum(values) != 0)
+                               throw new ParseException(String.format("invalid checksum at 0x%x in line %s", addr, line), 0);
+               } else {
+                       cmd = Altos.AO_LOG_INVALID;
+                       tick_valid = false;
+               }
+
                tick = values[3] + (values[4] << 8);
                a = values[5] + (values[6] << 8);
                b = values[7] + (values[8] << 8);
                data = null;
-               tick_valid = true;
        }
 
        public AltosEepromRecord (String line) {