Copyright © 2007 Simon Naunton (snaunton at users.sourceforge.net) Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
A Galileo download has a log and profile section as with the Uwatec Smart computers
The Galileo's model number is 17 (or 0x11 if you prefer).
This is still very much a work in progress. If you want to help, please send me some SmartTrak logs with Galileos downloaded to them. Or get in contact if you would like to help hack the download protocol - this does require a Galileo though :)
By all accounts the Galileo does not use the same download protocol as the Uwatec Smart computers. If anyone can try downloading a Galileo with a version of SmartTrak earlier than version 2 and let me know what happens - is it recognised? Downloaded? Error messages? etc - it would be appreciated. Also, if anyone would like to help hack the downloading please get in contact with me.
The Galileo's data is stored in SmartTrak in exactly the way as the Smart computers using the Log and Profile fields of the Dives table.
The header is 152 bytes in length and has the following format where (??) means that I do not have enough data to confirm, but it seems likely to be correct (if you would like to help, please email me a SmartTrak log with Galileo dives):
| Position | Num bytes | Description |
|---|---|---|
| 00-03 | 4 | 0xa5 0xa5 0x5a 0x5a |
| 04-07 | 4 | Dive Data Length |
| 08-11 | 4 | Dive Start Time |
| 12-15 | 4 | Unknown |
| 16 | 1 | UTC Offset (??) |
| 17 | 1 | Rep. No. |
| 18 | 1 | MB-level at start of dive (??) |
| 19 | 1 | Battery |
| 20-21 | 2 | Unknown |
| 22-23 | 2 | Maximum Depth |
| 24-25 | 2 | Unknown |
| 26-27 | 2 | Duration |
| 28-29 | 2 | Maximum Temperature |
| 30-31 | 2 | Minimum Temperature |
| 32-33 | 2 | Air Temperature |
| 34-37 | 4 | Unknown |
| 38-39 | 2 | Surface Interval |
| 40-41 | 2 | CNS% After Dive |
| 42-43 | 2 | Unknown |
| 44-45 | 2 | O2% Tank 1 |
| 46-47 | 2 | O2% Tank 2 (??) |
| 48-49 | 2 | O2% Tank D (??) |
| 50-51 | 2 | Tank 1 Pressure At End Of Dive |
| 52-53 | 2 | Tank 2 Pressure At Start Of Dive (??) |
| 54-55 | 2 | Tank D Pressure At End Of Dive (??) |
| 56-57 | 2 | Tank 1 Pressure At Start Of Dive |
| 58-59 | 2 | Tank 2 Pressure At End Of Dive (??) |
| 60-61 | 2 | Tank D Pressure At Start Of Dive (??) |
| 62-65 | 2 | Unknown |
| 66-67 | 2 | PO2 Limit - Tank 1 |
| 68-69 | 2 | PO2 Limit - Tank 2 |
| 70-71 | 2 | PO2 Limit - Tank D |
| 72-73 | 2 | Unknown |
| 74-75 | 2 | Altitude Level |
| 76-77 | 2 | Unknown |
| 78-79 | 2 | Depth Limit |
| 80-81 | 2 | Duration limit, default 60 mins? |
| 82-83 | 2 | Tank Pressure Limit - all tanks have the same limit. |
| 84-87 | 4 | Unknown |
| 88-89 | 2 | Desat Before Dive |
| 90-119 | 30 | Unknown |
| 120-123 | 4 | cpt data at start of dive. 8 cpts. Fast tissues to... |
| 124-127 | 4 | |
| 128-131 | 4 | |
| 132-135 | 4 | |
| 136-139 | 4 | |
| 140-143 | 4 | |
| 144-147 | 4 | |
| 148-151 | 4 | ...slow tissues |
32 bit big endian integer. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16) + (byte3 << 24)
The data length of the entire dive, profile + header including the 0xa5 0xa5 0x5a 0x5a at the begining of the header.
32 bit big endian integer. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16) + (byte3 << 24)
I originally thought that this was the number of half-seconds since 2000-01-01 00:00:00 UTC. However it is not and may be out by an hour or so (or even more?). To correct for this subtract the Time Correction obtained when downloading the dive computer from this value. Yes, this does mean that it is impossible to calculate the time exactly from a just a binary dump, including the Log and Profile fields in a smarttrak log book.
NOTE: This is in the UTC timezone, not the timezone the diver was in when the dive was undergone. smarttrak assumes that the dive was done in the same timezone as the PC that the dive computer is downloaded to - see the Adjust Time Zone section of the smarttrak manual. The Aladin PRIME and TEC have a built in timezone modifier called UTC Offset. See "UTC Offset" in the Aladin PRIME/TEC manuals.
8 bit integer. Aladin TEC/PRIME only.
Dive Start Time = UTC Offset * 1800 + Dive Start Time
1800 is the number of half-seconds in 15 minutes. See "UTC Offset" in the Aladin PRIME/TEC manuals.
8 bit integer. Aladin TEC/PRIME only.
I assume this number represents the dive number within a repetitative dive group.
8 bit integer.
The starting MB-level (Microbubble level) - Uwatec's diver settable fudge factor. Can be 0 to 5 representing L0 - L5.
8 bit integer. Aladin TEC/PRIME only.
I have no idea what this value actually means, however it corresponds with the Battery field in smarttrak.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The maximum depth of the dive in centimeters.
To convert to meters, divide by 100 (duh!)
To convert to feet, multiply by 0.032808399 (according to Google anyway).
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
Contains the duration of the dive in minutes.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The minimum temperature that occurred during a dive in tenths of a degree centigrade.
To convert to centigrade, divide by 10
To convert to fahrenheit... bah, work it out yourself!
16 bit big endian word. Aladin TEC/PRIME only. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The minimum temperature that occurred during a dive in tenths of a degree centigrade.
To convert to centigrade, divide by 10
To convert to fahrenheit... bah, work it out yourself!
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The percentage of O2 used for the dive. This value must be checked to be within the valid range (21 to 100), because this may contain weird values if the dive computer was in gauge mode during the dive.
16 bit big endian word. Aladin TEC/PRIME only. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The minimum temperature that occurred during a dive in tenths of a degree centigrade.
To convert to centigrade, divide by 10
To convert to fahrenheit... bah, work it out yourself!
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The number of seconds since the previous dive ended. If this value is 0 then there is no previous dive or the previous dive occurred to long ago for the surface interval to be relevant.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The CNS% after the dive.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
To convert to bar multiply by 0.0078125, add 0.5. and use the integer result.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The altitude level of the dive. See dive computer manual for a description.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
User settable PO2 Limit in bar * 10. Divide by 10 to convert to bar (duh! once more).
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
User settable depth limit alarm in centimeters. Divide by... no you can work that one out.
User settable tank pressure limit alarm.
To convert to bar multiply by 0.0078125, add 0.5. and use the integer result.
16 bit big endian word. To convert the value to an integer:
byte0 + (byte1 << 8) + (byte2 << 16)
The number of minutes to full desaturation when the dive starts.
The following works for all of the 6 Galileo profiles I have. There may be other data types that are not used in said profiles.
while bytes to read {
read byte
/* Test upper nibble of byte */
switch (byte & 0xf0) {
case 0x80 | 0x90:
RBT delta. 5 bit signed value in bits 0-4 of byte.
case 0xa0 :
Tank pressure delta in lower nibble of byte. 4 bit signed value in bits 0-3 of byte.
Divide by 4 for bar.
case 0xb0 :
Temperature delta in lower nibble of byte. 4 bit signed value in bits 0-3 of byte.
Divide by 2.5 for celcius.
case 0xc0 :
Increment Time by lower nibble of byte * 4 seconds. Lower nibble is 4 bit unsigned value.
case 0xd0 :
BPM delta in lower nibble of byte. 4 bit signed value in bits 0-3 of byte.
case 0xe0 :
Alarm
11100001 - Yellow buzzer in SmartTrak
11100010 - Red buzzer in SmartTrak
11100100 - Workload
11101000 - Safety stop timer started if current depth < 6.5 meters or bookmark
case 0xf0 :
/* Test lower nibble as well */
switch (byte & 0x0f) {
case 0 | 9:
Not sure of the meaning of either 0xf0 or 0xf9.
RBT display in smarttrak is turned off after:
11111001 00001000
And turned on after:
11111001 00000000
case 1 :
Absolute Depth in following two bytes MSB first.
Increment time by 4 seconds (unless this is the first depth read).
Divide by 50 for meters.
The first read of this is a calibration. Save the value
and subtract it from all further depths to get the
correct depth.
case 2 :
Absolute RBT in following byte
case 3 :
Absolute Temperature in following two bytes MSB first.
Divide by 2.5 for celcius.
case 4 :
Absolute Tank Pressure in following two bytes MSB first.
Divide by 4 for bar.
case 7 :
Absolute BPM in following byte
case 8 :
Absolute Bearing in following two bytes MSB first.
}
/* If byte does not match any of the above it must be a depth delta */
default :
Depth delta. 7 bit signed value in bits 0-6 of byte. Bit 7 is always 0.
Increment time by 4 seconds.
Divide by 50 for meters.
}
}
Thanks again to Rainer Mohr for more "active encouragment" and the provision of a SmartTrak logbook with Galileo data. His website divelogs.de will no doubt be the first implementation to use this spec.
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