AntiLog V4.1 User Guide Supplement
Contents
1. Anticyclone Systems 4 AntiLog V4 1 User Guide Supplement Development Issue 0 1 Anticyclone Systems Limited 28 Jan 2007 You have been supplied with an early development release of the V4 1 AntiLog embedded software as part of our continued product development programme This supplement lists the significant changes introduced since V4 0 Please note that the feature set for V4 1 has not been frozen at this time Anticyclone Systems Ltd reserves the right to modify features and unit operation before V4 1 is formally released 1 Media Extraction Event Processing Removing the media from a unit while the menu system is active will now update the terminal menu For example removing the media will now show that FLASH media is not installed any more Although this menu output would have been displayed in V4 0 if no media was present and a menu refresh was requested it did not automatically appear when media was removed in playback mode Inserting media still automatically updates the menu as it did in V4 0 AntiLog MR 4 1 Serial number ASL 16 3605 FLASH media not present PLAYBACK mode Data transfer and On button aware lt S gt Start playback now or use On button lt R gt Recording options lt P gt Playback options lt G gt General options lt L gt Lock user options lt B gt Battery check lt lt A gt About AntiLog U gt Shut down 2 NOLOG option A customer specific option is now2. ach time the terminal application keyboard ENTER key is pressed DOC AntiLog UG Guide 2006005_1 0 Page 1 of 4 5 Ring Buffer Storage AntiLog V4 1 now supports a Ring Buffer storage method In normal operation collected data is written to the FLASH media store unit until it is full and then logging stops This is important for critical data collection because with this storage method no previously recorded data can ever get overwritten so for example accidentally switching a unit on and filling it up will never overwrite what has already been recorded on a unit The only way to delete previously recorded data is to actively delete it in the playback mode With the new ring buffer storage feature enabled you define the total storage volume you would like to use for a media ring buffer and AntiLog will maintain the most recent data but will overwrite discard the oldest so that the total collected data still fits into the allocated media space This storage method is ideal when you want to capture an event from your source equipment which may only occur vary rarely Instead of using a very large media storage option to record everything so you can capture the event you can select the ring buffer storage method with a suitable ring size to ensure you capture the event and then if the event is detected you have a record of the logged data leading up to the event without having to download and process very large quantities of data A new Media w
3. available for secure equipment initialisation The NOLOG N Option This option allows an AntiLog unit to be used in an application which requires equipment to be initialised in the field using AntiLog s built in user command system without the requirement to insert media to collect recorded data As no media is required the unit will operate continuously and can be used in secure situations where the data the equipment transmits could otherwise be considered sensitive if it were recorded 3 AntiLog Command Line V4 1 supports the new ACL command line interface This interface allows communication between single or multiple units connected together on a common serial port bus using a simple text based command language All commands start with the character contain only ASCII characters and optionally end with an checksum sequence The command language can be selected to operate from any available AntiLog serial port and can even share input and output with the standard menu system when required ACL detail and ICD reference to be inserted here 4 CR LF detection for menu system The menu system now automatically detects whether you are using a terminal application that outputs carriage return lt CR gt or line feed lt LF gt or both in response to pressing the ENTER key in your terminal application For example this new feature now prevents unwanted menu refreshes caused by terminal programs that output both lt CR gt and lt LF gt e
4. ld in the AntiLog non volatile settings store not on the media itself so you can use media cards with different capacities knowing you have the same settings for each recording session If you have defined a ring buffer size which is higher than the current inserted media size then the maximum size available on the inserted media will be used instead DOC AntiLog UG Guide 2006005_1 0 Page 2 of 4 To enter your own total ring buffer storage size select the lt U gt item and you will be prompted to enter a value in Mbytes Enter the total storage size to use for a new ring buffer in MBytes Range 1 to 4096 Available size on inserted media is 983MB Please note that if a media card has already been used for ring buffer storage and you are about to append some data to the store then the size already allocated on the card is used to add another session If you need the AntiLog unit settings applied instead then you will need to use the Erase all recorded data item in the Recording Options menu to start a new ring buffer with your desired settings Internally AntiLog uses a special block overwrite algorithm to implement the ring buffer When you define the amount of media to be used for the ring buffer AntiLog divides this space into four blocks Data is written into these blocks in turn until the maximum capacity defined by the ring buffer size is exceeded At this point AntiLog will delete and overwrite data that appears in the first a
5. llocated block then the second third etc In this way AntiLog will always have at least three out of the four blocks of recorded data available for replay As an example if you define the total ring buffer media size to be 4MByte then at least 3MByte or more of data will be available for replay when you have recorded 3 or more MByte of data After 2 blocks After 4 blocks After 7 blocks After 10 blocks Figure 1 Ring buffer block filling during record The major advantage to this block overwrite ring buffer method is that you can record data as you normally would including support for multiple sessions time stamping sessions with completely different settings etc The disadvantage is that some space i e the empty part of the block that is being written to is not available at all times so you can only guarantee the storage capacity of three out of the four ring blocks at any one instant There are no options to select for playing back data from a ring buffer store Playback is completely automatic from a normal store or ring buffer store and data will always appear in the order it was recorded 6 Playback mode from hardware pin state For OEM customers that have the P hardware option installed there is a new feature to allow units to automatically power on in playback mode rather than the default record mode when power is applied to the unit If the EventIN pin is pulled low when power is applied and this feature i
6. rite options item in the Recording Options menu allows you to select the media writing method for a given task and it shows which method is currently active Recording Options Dual channel data logging oe Configure serial port 230400 8 N 1 E Record all data lt N gt Record filtered GPS NMEA lt M gt Record ICD GPS 15x lt S gt ASCII line sub sample filter lt T gt Enable time stamping lt X gt Define ASCII end of line character lt B gt Define On and Off button actions lt F gt Polled user equipment commands and functions 1000 mS lt W gt Media write options Normal write method active lt U gt User equipment command management L Panel LEDs enabled lt E gt Erase all recorded data lt R gt Record data now lt Esc gt Select lt W gt item to open the Media Write Options menu allows to select the normal logging method or a ring buffer method Media Write Options N Normal logging mode Store data up to media capacity and stop x R Ring buffer mode Store the latest data discard the oldest x M Use maximum media storage space available for ring buffer lt U gt User defined maximum ring buffer storage space lt Esc gt 2 If you chose the ring buffer method you can allocate all of the space available on any inserted media card as the ring buffer or you can define your own total ring buffer size instead The total storage size you define is he
7. s enabled in the menu system then the unit will start in the playback mode There is a new lt W gt Power Management Options item in the General Options menu which allows you to change power settings General Options Data transfer and On button aware lt T gt System time and date options Menu system on playback port settings P lt U gt Menu system on user defined port settings Q Menu is not displayed until key press Quiet D Dual serial port operation E Keypad two button hold ERASE enabled lt M gt Media data recovery lt W gt Power Management Options lt gt Perform embedded software upgrade lt R gt Reset current user options to factory defaults lt O gt User option management DOC AntiLog UG Guide 2006005_1 0 Page 3 of 4 lt S gt Start playback now or use On button lt Esc gt 2 The Power Management Options menu allows the automatic power saving mode to be enabled default and disabled and also allows the EventIN line to be used during power up Power Management Options Data transfer and On button aware x A Automatic power saving enabled x P Setting OEM line EventIn low forces Playback Mode at start up lt Esc gt a DOC AntiLog UG Guide 2006005_1 0 Page 4 of 4
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