PCM-3292 Users Manual
Contents
1. Id Description 038 Sierra Leone 078 Malta 1 WGS84 039 Algeria 079 Finland and Norway 000 Ethiopian Sudan 040 Bahrain Island 080 Portugal and Spain 001 Burkina Faso 041 Saudi Arabia 081 European 1979 002 Cameroon 042 _ Sumatra Indonesia 082 Iceland 003 Ethiopia 043 Iran 083 Ireland 004 Mali 044 Hong Kong 084 England Isle of Man 005 Senegal 045 Taiwan 085 England 006 Sudan 046 Bangladesh 086 England Wales 007 Somalia 047 India and Nepal 087 Scotland Shetland Islands 008 Botswana 048 Thailand 088 Wales 009 Burundi 049 Vietnam 089 Sardinia 010 Lesotho 050 Con Son Island 090 Hungary 011 Malawi 051 Thailand 1997 091 Poland OI Swaziland 052 Undonesia 092 _ Czechoslovakia 013 Zaire 053 Sri Lanka 093 Latvia 014 Zambia 054 West Malaysia Singapore 094 Kazakhstan 015 Zimbabwe 055 Korean Geodetic System 095 Albania 016 Kenya Tanzania 056 Masirah Island 096 Romania 017 Kenya 057 United Arab Emirates 097 Czechoslovakia 018 Tanzania 058 Saudi Arabia 098 Florida and Bahamas 019 Djibouti 059 Oman 099 CONUS 020 Guinea Bissau 060 Qatar 100 Western USA 021 South Africa 061 Singapore 101 Eastern USA 022 Tunisia 062 East Malaysia 102 _ Alaska excluding Aleutian Islands 023 Guinea Bissau 063 Japan Korea 103 Aleutian Isle East of 180 W 024 Egypt 062. lt altitude gt Maximum value for altitude meters lt velocity gt Maximum value for velocity m s lt acceleration gt Maximum value for acceleration m s2 The PCM3292 module checks the given parameters values against fixed upper limits for each of these parameters same as the factory defaults see below thus the user cannot set the parameters beyond these values If necessary the lt acceleration gt or lt velocity gt and lt acceleration gt parameters may be omitted If all the three parameters are omitted the command displays the current maximum limit values 5 5 Logging Commands The following sections introduce commands related to the CT5501 logging system 5 5 1 LOGCLEAR Clear log data Erases logs in CT5501 s memory PFST LOGCLEAR lt MODE gt lt MODE gt Clear operation 0 Reclaim the flash file system only Doesn t delete any logged data only frees up data clusters that have been deleted but not freed yet 1 Delete log data default Deletes logged data but keeps the current logging settings 2 Format the flash file system Formats the file system used by the logging system Not recommended for normal use useable only for recovering from an extreme system disaster 5 5 2 LOGFREE Amount of free space for log data Calculates how much space is available for log data S8PFST LOGFREE This command outputs the amount of free space in the reply messa
3. Porto Santo and Madeira Islands 208 ge E EE 73 Colombia 167 Puerto Rico and Virgin Islands 209 Kalimantan Indonesia 126 Argentina 168 South Greenland 210 Afghanistan 127 Paraguay 169 Sao Miguel 211 former Yugoslavia 128 Brazil 170 East Falkland Island 212 Pakistan Bolivia Chile Colombia Ecuador 129 Guyana Peru and Venezuela 171 Salvage Islands 213 Russia 130 Bolivia 172 __ Tristan da Cunha 214 Madagascar 131 Northern Chile 173 Cocos Islands 215 Tunisia Algeria 132 Southern Chile 174 Republic of Maldives 216 Tunisia Algeria 133 Colombia 175 Diego Garcia 217 Uruguay R 176 Kerguelen Island a SE es Jarjestelma 135 Guyana 177 _ Mahe Island 136 Peru 178 Mascarence Island 137 Venezuela 179 Ameriacn Samoa Island 138 Southern Chile 180 Iwo Jima 139 Mean Solution 181 Tern Island 140 Argentina 182 Marcus Island 141 Bolivia 183 Efate and Erromango Islands 142 Brazil 184 Phoenix Islands 143 Chile 185 Chatham Island New Zealand 144 Colombia 186 Gizo Island 145 _ Ecuador excluding Galapagos Islands 187 _ Easter Island 146 Baltra Galapagos Islands 188 New Zealand 147 _ Guyana 189 _ Guam 148 Paraguay 190 Guadalcanal Island 149 Peru 191 Johnston Island Caroline Island Fed States of 150 Trinidad and Tobago 192 Micronesia 151 Venezuela 193 Philippines 152 Suriname 194 Mindanao Island 153 Antigua Leeward Islands 195 Midway Islands 154 Ascencion Island 196 old Hawaiian 155 St
4. s thus quite normal for the logging to stop while enough flash space for several dozen more logs seems to be available This early stopping is implemented to prevent problems with logging settings and book keeping information due to the lack of available memory 40
5. Altitude 40 meters above the sea level PFST INITAID 131500 78 100102 lt CR gt lt LF gt Sets the initial time only NOTE This command has to be given before starting navigating If AUTOSTART is active navigation has to be stopped after switching on the power then issue the INITAID command and then START the navigation again The AUTOSTART is always set in CT5510 so this procedure must always be followed after power up with CT5510 29 Sample procedure SEND PFST STOP 1 lt CR gt lt LF gt POWER OFF This command allows CT5510 to store Almanac and Ephemeris data in the flash memory prior to shutting down Off time contributes to the start time of CT5510 General rules of thumb is as follows Between 1 to 4 hours Hot Start gt 10 15 seconds Over 4 hours Warm Start gt 35 50 seconds SEND PFST STOP 0 lt CR gt lt LF gt SEND PFST INITAID lt current time gt lt current date gt lt CR gt lt LF gt SEND PFST START lt CR gt lt LF gt 30 9 0 Overview The core engine of PCM 3292 is CT5510 The data logging capability of CT5510 enables the storage of time and location information in the built in flash memory while the module is navigating When logging the receiver periodically stores new log points which consist of the current navigation information There may be several different logs in the module s memory at the same time so that different routes ca
6. Helena Island 197 Hawaii 156 _ Bermuda Island 198 Kauai 157 Deception Island Antarctica 199 Maut 158 Nevis St Kitts Leeward Island 200 Oahu 159 _ Pico Sao Jorge 201 Pitcairn Island 160 South Georgia Island 202 Espirito Santo Island 25 8 0 Appendix Agenda The core engine of PCM 3292 is CT5510 The design of CT5510 emphasizes on compact overall physical dimension and fast fix time To accomplish these traits CT5510 was designed not to carry a capacitor or backup battery onboard This application notes will demonstrate on ways to efficiently manage the power consumption of CT5510 and achieve fast start fix time Power saving methods 1 Using the Sleep mode and PWRDOWN command 2 Using the INITAID Initial position and time aiding command Advantages 8 1 1PWRDOWN command procedure Using the sleep mode is recommended when navigation isn t needed since CT5510 consumes remarkably little power in the sleep mode and still re acquires the navigation fix quickly after waking up CT5510 consume between 70 v A to 100 v A during sleep mode comparing to 50mA in navigation mode INITAID command procedure Setting this information before starting navigating with the PFST START command reduces the time required for finding the satellites and receiving the first valid navigation fix Therefore CT5510 achieves fast starting time that s comparable to modules that have battery backup units Not
7. PPS timing signal mode 5 3 1 PPSMODE Set Pulse Per Second Mode Activates the One Pulse Per Second 1PPS operating mode The PPS mode requires precise information about antenna positioning to allow precise timing pulse Thus PCM3292 supports several PPS modes for acquiring the antenna position This command can be given only when navigation is stopped otherwise an error code results PFST PPSMODE lt mode gt lt mode gt PPS operating mode may be one of the following 0 PPS mode off PCM3292 doesn t output PPS pulse 1 PPS survey mode PCM3292 outputs PPS pulse 2 PPS static mode PCM3292 outputs PPS pulse 3 PPS roving mode PCM3292 outputs PPS pulse 5 3 2 PPSPOS PPS Static Mode Antenna Position Sets the antenna coordinates for PPS static mode The PCM3292 module can t start outputting the PPS signal until the antenna position is defined with this command PFST PPSPOS xxmm dddd lt N S gt yyymm dddd lt E W gt d d xxmm dddd Latitude xx degrees mm minutes dddd decimal part of minutes lt N S gt Either character N or character S N North S South yyymm dddd Longitude yyy degrees mm minutes dddd decimal part of minutes lt E W gt Either character E or character W E East W West D Altitude meters from sea level 5 3 3 SURVEYLEN PPS Survey Period Length Set PPS survey mode averaging period length SPFST SURVEYLEN
8. Step 1 Logging settings The logging filter settings define how often new points are added to the log and how much information is saved at each log point The default settings are that a new point is added to the log if the receiver has moved at least 15 meters AND at least 5 seconds have elapsed since the previous point was added to the log According to the default settings CT5510 stores time and latitude amp longitude coordinates at each point Step 2 Logging start mode By default logging is disabled To activate logging set the logging start mode to 3 In this mode a new log is created and logging is started each time when navigation is started The old logs are stored in the memory Using NMEA protocol The logging start mode is set to 3 with the following command PFST LOGMODE 3 lt CR gt lt LF gt NOTES e When using NMEA navigation has to be stopped before setting the logging start mode e In the logging start mode 3 logging is started each time when navigation is started To disable logging the start mode has to be set to zero see step 6 below e The logging settings are stored in flash memory and can thus persist resetting the module and switching off the power 32 Step 3 Start navigation When the logging settings have been configured as described in the previous sections logging starts automatically as navigation is started Navigation is started by e Giving the NMEA comman
9. lt LEN gt lt len gt Survey mode length number of valid fixes that are averaged during the survey mode 5 3 4 CABLEDEL Set PPS Cable Delay Set 1PPS mode cable delay PFST CABLEDEL lt DELAY gt lt DELAY gt Cable delay in units of 0 01 ms The cable delay can be either positive or negative in range of approx 21 21 ms 5 3 5 PULSEPOL Set PPS Pulse Polarity Set PPS mode electric pulse polarity PFST PULSEPOL lt POL gt lt POL gt 0 The PPS signal sets from high to low at PPS pulse 1 The PPS signal raises from low to high at PPS pulse 5 3 6 PULSELEN Set 1PPS Pulse Length Set PPS mode electric pulse length 8PFST PULSELEN lt LEN gt lt LEN gt 1 PPS pulse length in ms range 10 900 ms 5 4 Navigation Aiding Commands The following sections introduce the commands that provide the PCM3292 receiver with additional data which may be helpful for starting and during navigations 5 4 1 INITAID Initial Position And Time Aiding Gives the PCM3292 module the current position and time information for aiding the navigation startup Setting this information before navigation starts with the PFST START command reduces the time required for finding the satellites and receiving the first valid navigation fix If the position isn t known the initial time may also be given alone by omitting the position parameters i e using the command
10. of time that is stored into the log Users may affect the amount of data and span of time or distance that can fit into the available memory by using these settings Position and interval limits Users may define the minimum and maximum time intervals as well as the movement limits between the storing points Minimum interval time seconds A new point won t be added to a log if the time elapsed since the previous log point is less than the minimum interval time set An exception is that if the maximum movement limit is exceeded then a new point is logged Maximum interval time seconds If the time elapsed since the previous log point is longer than the maximum interval time set a new point is then logged The maximum limit is ignored if it s set to zero Minimum movement meters A new point won t be added to a log if the distance travelled from the previous log point is less than this limit An exception is that if the maximum interval time from the previous log point is exceeded then a new point is logged Maximum movement meters If the distance travelled from the previous log point is equal to or more than the maximum value set a new point is logged If the maximum value is set to zero the maximum limit isn t used 35 In pseudo code the limit rules are evaluated as follows if time gt min_interval and distance gt min_move then log else if time gt max_interval or distance gt max_move th
11. with only the two first parameters The altitude information is not critical and can be set to zero i e mean sea level if not known NOTE Even when INITAID is being used the PCM3292 module reports navigation data of the previous actual navigation fix until a new fix is acquired not the position and time data given in the INITAID command 8PFST INITAID lt time gt lt date gt lt lat gt lt N S gt lt long gt lt E W gt lt altitude gt lt time gt UTC time in hhmmss dd format hh hours 2 digits mm minutes 2 digits ss dd seconds with two decimals 2 2 digits lt date gt UTC date in ddmmyy format dd day 2 digits mm month 2 digits yy year 2 digits lt lat gt Latitude in degrees and minutes in xxmm dddd format xx degrees 1 2 digits mm dddd minutes with four decimals 2 4 digits lt N S gt Either a character N or S N north S south lt long gt Longitude in degrees and minutes in yyymm dddd format yyy degrees 1 3 digits mm dddd minutes with four decimals 2 4 digits lt E W gt Either a character E or W E east W west lt altitude gt Altitude from the sea level in meters 1 5 digits 16 5 4 2 ALTAID Set The Altitude Aiding Mode Sets or disables the altitude aiding mode where the navigation is assisted by using the given altitude value or an altitude value from a previous fix Altitude aiding enabl
12. 21 IRQ15 Table 2 PIN No PIN Name PIN No PIN Name PIN No PIN Name JP4 COM1 JP5 COM2 JP6 COM3 JP7 COM4 Table 3 PIN No PIN Name PIN No PIN Name JP10 External Interrupt Setting JP15 IRQ5 JP1 PIN No PIN Name JP1 Time Mark Output Setting J7 PIN No PIN Name PIN No PIN Name 1 NC 2 NC 3 NC 4 NC 5 GND Power 6 NC 7 NC 8 NC 9 Time Mark Pulse 1PPS 1 10 VCC Power PC 104 connectors J4 J5 J4 NENNEN 31 32 Row B QO Gr gt Row A 2 EE DNH 31 32 J5 NENNEN 19 20 Row C ot OQO Row D DLE O K DEER 19 20 PC 104 connectors Signal J4 Signal J5 ETORO Row A Row B Row C Row D 1 IOCHCHK 0V UN UN 2 SD7 RESET SBHE MEMCS16 3 SD6 5V LA23 IOCS16 4 SD5 IRQ9 LA22 IRQ10 5 SD4 5V LA21 IRQI1 6 SD3 DRQ2 LA20 IRQ12 7 SD2 12V LA19 IRQI5 8 SD1 ENDXFR LA18 IRQ14 9 SDO 12 LA17 DACK0 10 IOCHRDY KEY MEMR DRQO 11 AEN SMEMW MEMW DACKS5 12 SA19 SMEMR SD8 DROS 13 SA18 IOow SD9 DACK6 14 SA17 IOR SD10 DRQ6 15 SA16 DACK3 SD11 DACK7 16 SA15 DRQ3 SD12 DRQ7 17 SA14 DACK1 SD13 5V 18 SA13 DRQI SD14 MASTER 19 SA12 REFRESH SD15 0V 20 SA11 SYSCLK KEY 0V 21 SA10 IRQ7 Gs ee 22 SA9 IRQ6 23 SA8 IROS Ge 24 SA7 IRQ4 25 SA6 IRQ3 Ges 26 SAS DACK2 E 27 SA4 TC SC Se 28 SA3 BALE 29 SA2 5V S
13. 3292 module 5 2 Configuration Commands The following sections introduce the commands used for controlling the behavior of PCM3292 5 2 1 NMEA NMEA Serial Communication Sets the NMEA message mask and NMEA serial port communication speed This message mask defines which of the NMEA messages are being outputted PFST NMEA lt mask gt lt speed gt lt mask gt NMEA messaging mask bitmap in hexadecimal notation If it s desired to change only the speed while keeping the old message mask this parameter may be omitted and use instead Mask bits for message are defined as follows Message bit GSV 0x0001 GSA 0x0002 ZDA 0x0004 PPS 0x0010 FOM 0x0020 Reserved 0x0040 GLL 0x 1000 GGA 0x2000 VTG 0x4000 RMC 0x8000 Le to allow GLL and RMC messages one would set mask as 0x1000 0x8000 0x9000 See examples below Note that hexadecimal digits A B C D E and F must be in capital letters Enables a message used for special purposes lt speed gt Communication speed Either 1200 2400 4800 9600 19200 57600 or 115200 NOTE 1 Using message mask FFFF command PFST NMEA FFFF is not recommended Although it may be used to turn on all messages the side effect of this would be that all new messages in future PCM3292 versions will also be turned on The following messages are enabled by default GGA RMC GSA GSV NOTE 2 NMEA Serial port settings
14. 4 Japan 104 Aleutian Isle West of 180 W 025 Tunisia 065 Okinawa 105 Bahamas 026 Ghana 066 South Korea 106 San Salvador Island 027 Liberia 067 Australia 1966 107 Canada Mean Solution 028 Eritrea 068 Australia 1984 108 Alberta and British Columbia Id Description 029 Morocco 109 Eastern Canada 030 Cameroon 069 Estonia 110 Manitoba and Ontario 031 Nigeria 070 Europe 1950 111 NW Territories and Saskatchewan 032 Gabon 071 Westerm Europe 1950 112 Yukon 033 Algeria 072 Cyprus 113 Canal Zone Id Description 073 England Channel Islands 114 Caribbean 034 Old Egypt 074 England Ireland 115 Central America 035 Burkina Faso and Niger 075 __ Greece 116 Cuba 036 Congo 076 Italy Sardinia 117 Greenland Hayes Peninsula 037 Namibia 077 __ Italy Sicily 118 Mexico 24 119 Alaska excluding Aleutian Islands 161 Cayman Brac Island 203 Viti Levu Island Fiji Islands 120 Aleutian Islands 162 Montserrat Leeward Islands 204 Marshall Isalands 121 Canada 163 Trinidad and Tobago 205 Wake Atoll Bankga and Belitung Islands 122 _ CONUS 164 _ Corvo and Flores Islands 206 Indonesia0 123 Hawaii 165 _ Cayman Island 207 Camp McMurdo Area Antarctica 124 Mexico and Central America 166
15. ORE NOTE Navigation has to be stopped before giving this command NOTE PCM3292 doesn t store configuration parameters in flash memory and thus this command doesn t have any effects on the PCM3292 modules For PCM3292 the preferred way is to set parameters each time when the module is reset or switched on 5 2 8 RESETDATA Erases the navigation data stored in the flash memory i e erases the last good known navigation fix ephemeris almanac and UTC Ionosphere model data The module has to be reset after this command to abandon all the above data otherwise some of the data may still reside in RAM memory PFST RESETDATA NOTE Navigation has to be stopped before giving this command NOTE This command doesn t affect logged data Log data is cleared with PFST LOGCLEAR command 5 2 9 RESTORE Restores Default Parameter Set Restores factory default parameter set SPFST RESTORE NOTE Navigation has to be stopped before giving this command NOTE PCM3292 doesn t store configuration parameters to flash memory and thus this command is irrelevant with PCM3292 module NOTE This command doesn t affect the last good navigation fix ephemeris UTC ionosphere model data or log data Navigation ephemeris and model data is erased with the PFST RESETDATA command Log data is cleared with the PFST LOGCLEAR command 5 3 PPS Mode Commands The following sections introduce commands used for controlling the one pulse per second
16. PCM 3292 PC 104 GPS Module Users Manual Contents 1 0 Connectors DENIM ic icdcvserincanstadtesavediaacerpideadaneelsaaeaneldddanaeldagesabededavaedlandanstdeadsvaetiadasataestavad Mantehtvens 4 2 0 Jumper Settings 0 00 nre eaaa ne eee eee ern EENE RANEA EEEE AEREE EEEE NEEE ERARA 6 KO MORE eege ee ge e pared A E OAA 6 4 0 Module Dimensions ce aeee cece eee ceeaaeaeeeeeeesecaaaaeceeeeeeeesecaaeaeeeeeeeseeescaeeeeeeeeteenaees 8 5 0 NMEA Protocol ee 9 5 1 General NMEA CommandS ceccccecce cece ee eeeeecaeceeeeeeececeaaaeceeeeeeeseceaaaeceeeeeeesecucaesaeeeeeeesetsnnaeeeees 9 5 1 1 START Start Navigation 9 6 1 2 STOP Stop Navigation 0 eee tre ie eee eens eerie ee Enun Aten erties AE teases tneeeeee 10 5 1 2 PWRDOWN PCM3292 Sleep Mode sssnsssesisssesiiesssrrsserrsstrrsstrrsntttrnnsttnrnntennnsttnnnnten nnt 10 5 1 3 SW PCM3292 Software Hevision ec cceceeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeseeeaeeeseeeaeeeeeeeaaeeeseenanees 10 5 2 Configuration Commandes 11 5 2 1 NMEA NMEA Serial Communication cccececeeeeeeeeeeeeeeeeeeeeeecacaeeeeeeesesesnaeaeeeeeees 11 5 2 2 AUTOSTART Set Autostart Mode 12 5 2 3 CONF Set Configuration Parameters sssseseerrenssnnesesnnannannnnneennaanannanetnnaanannnneennadnannaa 12 5 2 4 DATUM Set Local Coordinate System essseeeessesssrrssesnnansnnnaneennaannannanttnnaannnnaatennaanannaa 13 0 20 FIXRATE Seu EE 13 5 2 6 SYNCMODE
17. Synchronous NMEA Output Mode 13 5 2 7 STORE Store Current Parameter Gei 13 D2 O RESETDATA E 14 5 2 9 RESTORE Restores Default Parameter Gei 14 9 3 PPS Mode COmMands ivc cstcccieaccecissinancarcecvecs sates canscecdecenatade sanded ddeasdecsasnacesdecavanndathancacdevannutausaesaad 15 5 3 1 PPSMODE Set Pulse Per Second Mode sssesssssrennseeseersrtnrstsstttnrtnnntnsstentrnnnn nnne nenna 15 5 3 2 PPSPOS PPS Static Mode Antenna Position cceeceeeeeeeneeeeeeeeeeeeeeeeeeeseeeaeeeseeaeees 15 5 3 3 SURVEYLEN PPS Survey Period Length 15 5 3 4 CABLEDEL Set PPS Cable Delai 16 5 3 5 PULSEPOL Set PPS Pulse Polarity ccceccceeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeaeeeesenaeereeeatees 16 5 3 6 PULSELEN Set 1PPS Pulse Lengt 16 5 4 Navigation Aiding Commandes cece e cette eee aaO 16 5 4 1 INITAID Initial Position And Time Aiding cccceeeceeeeeeeeeeeeeeeeeeeeeeeteneeeeeteeaeeeeenaeees 16 5 4 2 ALTAID Set The Altitude Aiding Mode A 17 5 4 3 SETLIMIT Set Limits For Altitude Velocity And Acceleration 0 c ccseereereteees 17 9 5 Logging Benn EE 18 5 5 1 LOGCLEAR Clear log data 18 5 5 2 LOGFREE Amount of free space for log data 18 5 5 3 LOGGET Output logged data 18 5 5 4 LOGINFO Show log miormaton nanten nnanen nna 18 5 5 5 LOGMODE Set logging start mode cece eeeeee ee teee eter eeeeeeeeeeeeeaeeeseeeaeeeseeeaeeeeeeaees 19 5 5 6 LOGNAME Set log Na
18. T teeter ee eeeeeeeeeeneeeeeseneeeeesecceaeeeseneaeeeseneaeeeseeaeeeseeaaaees 39 14 0 USAGE CONGSIDERATIONS A 40 Major Specifications Satellite Tracking RF input Center frequency Characteristics impedanc Signal sensitivity Default Software Selectable Positioning system Positioning accuracy Position Velocity Follow up performance Acceleration Navigation Update Rate Operation Temperature Storage Temperature Operating voltage Antenna supply Antenna Power drain Communication Specification Communication method Transfer rate input output Logic levels Communication format Default Output Message Time mark pulse output Weight Dimensions 12 Parallel channels 1575 42MHz L1 band C A code 50 ohm 145 dBm WGS 84 All major coordinate systems 10 m CEP 50 0 2m s 50 4G Default 1 second 40 C to 85 C 40 C to 95 C 5Vt5 ripples within 50mVp p 3 3V External active antenna 160mA Active antenna power not included Start stop synchronization 2400 4800 Default 9600 19200 115200bps TTL compatible NMEA O0183 GGA GSA GSV RMC VTG 1 PPS less 110 g 95 9 x90 2 x28 6 mm 1 0 Connectors Defined Table 1 PIN No PIN Name PIN No PIN Name PIN No PIN Name JP8 IRQ3 JP13 IRQ3 JP18 IRQII1 JP9 IRQ4 JP14 IRQ4 JP19 IRQ12 JP11 IRQS JP16 IRQ7 JP20 IRQ14 JP12 IRQ7 JP17 IRQ10 JP
19. d PFST START lt CR gt lt LF gt e Resetting the CT5510 module assuming that the auto start after power up is enabled on by default Step 4 Downloading logged data After the CT5510 has been navigating and logged the logged data can be downloaded to PC in the following ways Using NMEA protocol 1 Stop navigation to finish the logging session 2 Read the number of logs that are in CT5510 s memory as new logs are created each time when logging is started with the given settings The number of logs can be displayed with the PFST LOGNUM command e g PFST LOGNUM lt CR gt lt LF gt The system responds with a message containing the number of logs e g SPF ST LOGNUM 1 32 This shows that there is one log currently in the memory 3 The logged data can be outputted using the command PFST LOGGET lt N gt where lt N gt is the log number of interest This command outputs the logged data in standard NMEA format For example the following command will display all data in log 1 PFST LOGGET 1 lt CR gt lt LF gt NOTE If there are plenty of data in the log it may take some time to output all the data as NMEA messages To speed up the operation it is advised to increase the NMEA port speed or disable some of the NMEA messages 33 Step 5 Erasing logs CT5510 s logging system doesn t automatically delete old log data but always creates new logs or appends data to the previous log While it s often advanta
20. disabled default 1 Logging is started so that a new log is created once when navigation is started for the next time On consecutive navigation starts logging won t be used after that 2 The previous log is continued once when navigation is started for the next time On the consecutive navigation starts logging won t be used after that 3 Logging is started so that a new log is created each time when navigation is started Logging is active until user changes the start mode again 4 The previous log is continued each time when navigation is started Logging is active until user changes the start mode again 5 5 6 LOGNAME Set log name Set log name This name concatenated with the log number is displayed in the log information SPFST LOGNAME lt NAME gt lt NAME gt New name to be used with new logs If omitted displays the current name 5 5 7 LOGNUM Get number of logs Show how many logs are currently stored in the memory SPFST LOGNUM The number of logs lt NUM gt is displayed on the reply message SPFST LOGNUM lt NUM gt hh 5 5 8 LOGSETTING Set logging settings Sets the logging settings 8PFST LOGSETTING lt LEVEL gt lt MININT gt lt MINMOVE gt lt MAXINT gt lt MAXMOVE gt lt LEVEL gt How much information is saved along each log item may have values between 1 6 lt MININT gt Minimum interval time seconds A new point won t be added to a log if the tim
21. e comparing to the PWRDOWN command procedure INITAID command requires the complete shut down of power supply including the antenna 26 PWRDOWN CT5510 to Sleep Mode Commands CT5510 to sleep mode CT5510 wakes up from the sleep mode when the timeout has expired or the GPIO pin 11 state is toggled If the receiver was navigating when the PWRDOWN command was given navigation will automatically be restarted after waking up from the sleep mode PFST PWRDOWN lt hours gt lt minutes gt lt seconds gt or PFST PWRDOWN lt hours gt How many hours to sleep lt minutes gt How many minutes to sleep lt seconds gt How many seconds to sleep Examples PFST PWRDOWN 1 30 15 lt CR gt lt LF gt Sleep for Ih 30min 15 sec or until GPIO 11 pin is toggled PFST PWRDOWN 0 0 30 lt CR gt lt LF gt Sleep for 30 seconds or until GPIO 11 pin is toggled PFST PWRDOWNK lt CR gt lt LF gt Sleep until GPIO 11 pin is toggled 27 The following section introduces commands for providing the CT5510 receiver with additional data that will be helpful when starting navigation and during navigation INITAID Initial position and time aiding Gives the CT5510 module the current position and time information for aiding the navigation startup If the position isn t known the initial time may also be given alone by omitting the position parameters i e using the comma
22. e elapsed is less the set value since the previous log point An exception is that if the maximum movement limit is exceeded then a new point is logged lt MINMOVE gt Minimum movement meters A new point won t be added to a log if the distance traveled from the previous log point is less than this limit An exception is that if the maximum interval time from the previous log point is exceeded then a new point is logged lt MAXINT gt optional Maximum interval time seconds If this time or longer has elapsed since the previous log point a new point is logged If omitted or set to zero the maximum limit isn t used lt MAXMOVE gt optional Maximum movement meters If distance from the previous log point is this distance or more a new point is logged If omitted or set to zero the maximum limit isn t used If all parameters are omitted the command shows the current settings in the reply message 5 5 9 LOGSTOP Stop Logging This command can be used to stop logging while navigating without stopping navigation at the same time When navigation is started next time logging is started in a normal fashion as defined by the logging start mode 6 0 NMEA Message This chapter describes the supported NMEA output messages 6 1 GGA Global Positioning System Fix Data Time position and fix related data for a GPS receiver GPGGA hhmmss dd xxmm dddd lt N S gt yyymm dddd lt E W gt v ss d d h h M g
23. en log else dont_log Default settings for the filter limit are as follows min interval 5 max interval 0 max limit not used min move 15 max move 0 max limit not used According to these default settings a new point is logged when at least 5 seconds has elapsed from the previous point and the distance from the previous point is at least 15 meters Example Assume that the limit settings are defined as follows min interval 5 max interval 60 min move 15 max move 100 In this case a new point is logged when at least 5 seconds has elapsed from the previous point and the distance from the previous point is at least 15 meters A new point is also logged when at least 60 seconds has elapsed since the previous point or the distance from the previous point is 100 meters or more 36 Logging data level Logging data level controls how much information is stored at each log point The data level directly affects how much space each log point requires and consequently how many log points can fit in memory Data Level Size per point Information stored per point 16 bit words 1 4 Latitude amp Longitude coordinates 2 6 Lat amp Lon GPS Time 3 2 Lat amp Lon Time Altitude 4 8 Lat amp Lon Time Alt Fix information i e number of satellites used for fix 2D 3D fix indicator HDOP value 5 10 Lat amp Lon Time Alt FixInfo Horizontal Velocit
24. es a navigation fix with fewer than four satellites and as a matter of fact altitude aiding is used only if there are four or less satellites visible Note that the aided altitude is used as an additional observation and the altitude is still calculated not fixed to the given or aided altitude Altitude aiding commands can be given before starting or during the navigation The altitude aiding mode is reset to no altitude aiding when navigation is stopped By default the altitude aiding mode is disabled PFST ALTAID lt mode gt lt altitude gt lt mode gt A numeric value indicating the new altitude aiding mode 0 No altitude aiding default 1 Altitude hold mode Use an altitude from the previous fix 2 External altitude mode Use constant altitude given in the lt altitude gt parameter lt altitude gt Constant altitude in meters above the sea level used in altitude aiding mode 2 This parameter is ignored in other modes The constant altitude is subject to the altitude limits as defined in the command PFST SETLIMITS 5 4 3 SETLIMIT Set Limits For Altitude Velocity And Acceleration Sets the upper limits for altitude velocity and acceleration parameters that the PCM3292 navigation subsystem accepts for a valid fix Setting realistic lower than default limits for these parameters hastens finding a valid navigation fix 8PFST SETLIMIT lt altitude gt lt velocity gt lt acceleration gt
25. ff 10 BOOL 1 Carrier smoothing on off 17 BOOL 0 Route nav amp msg task messages to host enables calculating the navigation fix in host 45 WORD 12 Number of receiver channels 47 BOOL 0 Disable fast search gt uses slower but more sensitive search mode 48 WORD 7000 Acq search window width Hz from middle of the window 50 DOUBLE 5 _ Timeout for resetting the post filters 51 DOUBLE 0 4 Coefficient for position smoothing high 52 DOUBLE 0 12 Coefficient for position smoothing low 53 DOUBLE 0 0001 Velocity filter coefficient low limit 54 DOUBLE 0 5 Velocity filter coefficient high limit 55 DOUBLE 3 0 Pinning lag criteria meters In pinning mode the position may lag behind the actual position by this amount 59 DOUBLE 1 0 Pinning velocity limit Goes to pinning mode if velocity is below this limit 70 DOUBLE 50 FOM limit Fix is marked invalid if FOM is larger than this value 71 DOUBLE 22 HDOP limit Fix is marked invalid if HDOP is larger than this value NOTE In order to preserve this setting after reset or power up the new setting has to be stored to flash memory by using the PFST STORE command 5 2 4 DATUM Set Local Coordinate System Selects the local coordinate system After this command the PCM3292 will return positions in the selected coordinate system 8PFST DATUM lt datum_id gt lt datum_id gt Coo
26. g M a a xxxx hh lt CR gt lt LF gt hhmmss dd UTC time hh hours mm minutes ss seconds dd decimal part of seconds xxmm dddd Latitude xx degrees mm minutes dddd decimal part of minutes lt N S gt Either character N or character S N North S South yyymm dddd Longitude yyy degrees mm minutes dddd decimal part of minutes lt E W gt Either character E or character W E East W West V Fix valid indicator 0 Fix not valid 1 Fix valid Ss Number of satellites used in position fix 00 12 Fixed length d d HDOP Horizontal Dilution Of Precision h h Altitude mean sea level geoid M letter M g g Difference between the WGS 84 reference ellipsoid surface and the mean sea level altitude M letter M a a NULL missing XXXX NULL missing 20 6 2 GSA DOP And Active Satellites GPS receiver operating mode satellites used in the navigation solution reported by the GGA sentence and DOP values GPGSA a b XX XX XX XX XX XX XX XX XX XX XX XX 0 0 h A v v hAh lt CR gt lt LF gt A Mode M Manual forced to operate in 2D or 3D mode A Automatic allowed to automatically switch 2D 3D B Mode 1 Fix not available 2 2D 3 3D XX ID PRN numbers of GPS satellites used in solution p p PDOP h h HDOP V V VDOP 6 3 GSV Satellites In View Number of satellites in view satellite ID PRN numbers elevation az
27. ge 8PFST LOGFREE lt WORDS gt lt ITEMS gt hh Where lt WORDS gt is the amount of free space in 16bit words and lt ITEMS gt is how many log items fit into the free space with the current logging settings 5 5 3 LOGGET Output logged data Output logged data items This command outputs the logged data in standard NMEA format messages according to the current NMEA settings PFST LOGGET lt LOGNUM gt lt FIRSTITEM gt lt NUMITEMS gt lt LOGNUM gt Log number lt FIRSTITEM gt optional The first item that is outputted If omitted starts from the first item of the log lt NUMITEMS gt optional The amount of items being outputted If omitted outputs all items until the end of the log 5 5 4 LOGINFO Show log information Show log information including log name how many items have been stored to the log and what data level has been used PFST LOGINFO lt L LOGNUM gt OGNUM gt lt LOGNUM gt Number of the log of interest The log information is displayed on the reply message PFST LOGINFO lt LOGNUM gt lt NAME gt lt ITEMS gt lt DATALEVEL gt hh Where lt NAME gt is name of the log lt ITEMS gt is the amount of items data points that are in the log and lt DATALEVEL gt is the data level setting 5 5 5LOGMODE Set logging start mode Set logging start mode PFST LOGMODE lt MODE gt lt MODE gt Log start mode May be one of the following 0 Logging
28. geous to have several logging sessions in memory at the same time eventually the memory will be filled up if old log data isn t erased Using NMEA protocol The log data is deleted with the following command SPFST LOGCLEAR lt CR gt lt LF gt Step 6 Disable logging When the logging system is configured as described above a new log is created each time when navigation is started To stop using the logging capability the logging can be disabled by setting the start mode to Zero Using NMEA protocol The logging start mode is set to zero with the following command PFST LOGMODE 0 lt CR gt lt LF gt Summary This chapter describes the quick steps for using the CT5510 logging system 1 No action needed at first step if the default logging settings are ok 2 Set logging start mode to 3 NMEA SPFST LOGMODE 3 lt CR gt lt LF gt 3 Start navigation SPFST START lt CR gt lt LF gt 4 Download logged data NMEA PFST LOGGET 1 lt CR gt lt LF gt 5 Erase log data NMEA PFST LOGCLEAR lt CR gt lt LF gt 6 Disable logging 34 NMEA SPFST LOGMODE 0 lt CR gt lt LF gt 11 0 LOGGING SETTINGS This chapter describes the settings that affect the logging system These settings can be configured by using the NMEA protocol The log settings are stored in flash memory and thus they will stay valid until the user reconfigures them Logging filters Logging filters control how often and the amount
29. imuth and SNR value The maximum information for each message is four satellites Additional messages up to a maximum of eight is sent as needed The satellites are in the PRN number order Only the SNR signal to noise ratio value is available until a position fix is attained The elevation and azimuth angles are also added after a fix Note that there CAN be theoretical satellites in the GSV message These are the satellites with known angles elevation azimuth but for some reason e g due to an obstruction have not been found by PCM3292 The SNR value for these satellites are set to zero Please notice that as all viewable satellites are reported the amount of satellites may occasionally be exceed the number of receiver tracking channels 12 GPGSV N M SS XX C AAA CN 0 eee eee Nee aaa cn hh lt CR gt lt LF gt N Total number of messages 1 to 9 M Message number 1 to 9 Ss Total number of satellites in view Xx Satellite ID PRN number Ee Satellite elevation degrees 90 max Aaa Satellite azimuth degrees True 000 to 359 cn SNR C No 00 99 dB Hz zero when not tracking 21 6 4 RMC Recommended Minimum Specific GNSS Data Time date position course and speed data GPRMC hhmmss dd S xxmm dddd lt N S gt yyymm dddd lt E W gt s s h h ddmmyy d d lt E W gt M hh lt CR gt lt L F gt hhmmss dd UTC time hh hours mm minutes ss seconds dd decimal
30. me e EEeEudeteE gege aa aaa ERRA Na EAEAN RE ARARA 19 5 5 7 LOGNUM Get number Of logs c ce cecceeeeeeeeeeeeeeeeeeeeeeeeeeeeseeaeeeseeeaeeeseeeaeeeseeaaeeeeeeaaeees 19 5 5 8 LOGSETTING Set logging Settings ssec eeeceeeceeeeeeeeeeeeeeeseeeeeeeeseeeaeeeseeeaeeeseeaeeeeeeaeess 19 5 899 LOGSTOP Stop Logging cressoni ea aE A EARE AEA E 20 6 0 NMEA MESSAGE EE 20 6 1 GGA Global Positioning System Fix Data 20 6 2 GSA DOP And Active Satellites jis tsiucnacccccineecudianncndeessaaucsananandedesaawdarasanddeessdenetiasiadeiassaandeatanades 21 6 3 CSV Satellites Im Vio W tat ge cexsuas danas shavecssnndadacatsaaecdanesdanatwnde aA E A a 21 6 4 RMC Recommended Minimum Specific GNSS Data 22 6 5 VTG Course Over Ground And Ground Gpeed nennen nenen 23 0 Appendix Datum RE 24 8 0 Appendix EE WEE 26 8 1 1 PWRDOWN command Drocedure tetese ttttntttestttttttt tenenti ttnn nnanet nn rEnn nennen neen 26 INITAID Initial position and time aiding eeeseeeeeeeeeeeeenreseeerrssernssttrrsnttnnnsttnnnntennnnstennnntennnnennn 28 9 0 Overview 22 eeceecccccceceee cece ceaeee cece tesa aeaeeaeceeeeeea ce aaanaeceeeeeceaaaeaeeeeeeeseceaeaaeaeceseesegeenceeeeesesensaneeeeees 31 10 0 QUICK START 32 11 0 LOGGING SETTINGS 1 0 ter rr ie nee eee ere ee eerie essere eee ee tees ee neeeeeeaeeeee 35 12 0 DOWNLOADING LOGGED DATA TO HOST 000 eeeceeeeceeeeeeeeeeeeeeeeteneeeeeseneaaeeeseneaeeesenaeeeseneaeees 38 13 0 NMEA PROTOCOL GUDPOR
31. n be stored The user may upload the logged data from the module to a PC or other host devices for observation and processing Users may choose how much information is stored along each point affecting the number of log points stored in the available memory Each log point may contain the following navigation information or a subset of them e Latitude longitude coordinates with a resolution of 0 0000001 degrees about 1 cm on earth surface e Altitude with a resolution of 1 meter e Time with a resolution of 1 second e Horizontal and vertical velocity with a resolution of 0 01 m s direction of movement with a resolution of 0 01 degrees e Fix quality information like the number of satellites used in a fix 2D 3D fix indication HDOP value with a resolution of 0 1 units User may also set various conditions for how often new data points are added to the log e Minimum and maximum time may elapse between logging points e Minimum and maximum distance the receiver may move between logging points Depending on the logging settings between 14000 to 39000 log points can fit into the memory of a standard CT5510 module with 8Mbits of flash memory The logging capability is not available in CT5510 modules with 4Mbit flash memory 31 10 0 QUICK START This chapter describes the quick steps to start using the logging system During these steps users may use either the NMEA protocol to communicate with the CT5510 module
32. n is typically 25milliseconds l RO NOR OB eh chl Width 25ms Figure 1 GPS Receiver Time Mark Pulse Waveform 4 0 Module Dimensions 3250 350 3775 28 6 Unit mm 5 0 NMEA Protocol NMEA Commands This chapter describes the supported NMEA commands 5 1 General NMEA Commands The following sections introduces the general purpose NMEA commands the basic PCM3292 operations 5 1 1 START Start Navigation Commands PCM3292 to start navigation The command has no effect if called while PCM3292 is already navigating After the start command has been given it takes some time for PCM3292 to acquire satellites gather data from the signal and calculate a first fix SPFST START lt startmode gt lt start mode gt Navigation start modes 0 Autostart Always uses the fastest possible start mode 1 4 Default value 1 Force cold start Module will behave as if no valid ephemeris or PVT data were available 2 Request warm start 3 Request hot start Requires RTC time valid ephemeris and PT data Calculates a fix as soon as PS time is acquired from the GPS signal 4 Request quick start Requires RTC time and recent ephemeris Assumes that RTC time is very accurate and doesn t wait for GPS time Notice that if the host requests faster start mode than possible e g hot start when there is no ephemeris data available start mode 0 will be used RTC time is available if
33. nd with only the first two parameters The altitude information is not critical and can be set to zero i e mean sea level if not known NOTE Even after INITAID is issued the CT5510 module continues to report the navigation data of the previous actual navigation fix until a new fix is acquired PFST INITAID lt time gt lt date gt lt lat gt lt N S gt lt long gt lt E W gt lt altitude gt lt time gt UTC time in hhmmss dd format hh hours 2 digits mm minutes 2 digits ss dd seconds with two decimals 2 2 digits lt date gt UTC date in ddmmyy format dd day 2 digits mm month 2 digits yy year 2 digits lt lat gt Latitude in degrees and minutes in xxmm dddd format xx degrees 1 2 digits mm dddd minutes with four decimals 2 4 digits lt N S gt Either a character N or S N north S south lt long gt Longitude in degrees and minutes in yyymm dddd format yyy degrees 1 3 digits mm dddd minutes with four decimals 2 4 digits lt E W gt Either a character E or W E east W west lt altitude gt Altitude from the sea level in meters 1 5 digits Examples PFST INITAID 13 1500 78 100102 6016 3075 N 2458 3817 E 40 lt CR gt lt LF gt Sets the initial position and time as follows 28 Time 13 15 00 78 UTC Date 10 10 Jan Jan 2002 Latitude N60 16 3075 Longitude E24 58 3817
34. ogging commands Command Description LOGCLEAR Erase log data from CT5510 s memory LOGFREE Calculate how much space is left for log data LOGGET Output logged data as standard NMEA messages LOGINFO Show log information LOGMODE Set logging start mode LOGNAME Set log name LOGNUM Show how many logs are currently stored in the memory LOGSETTING Sets the logging settings LOGSTOP Stop logging without stopping navigation 39 14 0 USAGE CONSIDERATIONS Sleep mode Sleep mode power down mode doesn t affect the logging system If logging is active when going to sleep mode logging is resumed as the module wakes up and first valid fixes are received Power down The CT5510 s logging system can sustain sudden power losses without major affects however it s suggested to stop navigation properly prior to switching off the power or otherwise some of the most recently logged data may be lost and as CT5510 s logging system performs automatic recovery checks due to the power loss the next power up time may be longer It s also possible that CT5510 s logging system may occasionally unable to continue the previous log logging start modes 2 and 4 after sudden power losses In such cases the logging system creates a new log and continues using that one as usual Memory full CT5510 s logging system automatically ceases from logging shortly before the flash memory gets totally full It
35. other than speed cannot be changed The settings for the port are Default speed 4800 bps No parity cannot be changed 8 data bits cannot be changed 1 stop bit cannot be changed NOTE 3 In order to preserve this setting after reset or power up the new setting has to be stored in flash memory by using the PFST STORE command 11 5 2 2 AUTOSTART Set Autostart Mode Defines if PCM3292 automatically starts navigation when power is turned on or PCM3292 is reset PFST AUTOSTART lt 1 0 gt lt 1 0 gt 1 to enable 0 to disable autostart NOTE In order for this message to have an effect the new setting has to be stored in flash memory by using the PFST STORE command NOTE Since PCM3292 doesn t save parameters in non volatile memory AUTOSTART command has no effect in PCM3292 5 2 3 CONF Set Configuration Parameters This command is used for setting the configuration parameters of PCM3292 SPFST CONF lt ID gt lt VALUE gt lt ID gt Configuration parameter ID number See the table below for possible values lt VALUE gt New value for the parameter If omitted the command shows the current value of the configuration parameter Available configuration parameter ID s are Param ID Param Default Description Type value 1 BOOL 1 Position pinning on off 1 on 3 BOOL 1 Velocity smoothing on off 4 BOOL 1 Position smoothing on o
36. part of seconds Status indicator A valid V invalid xxmm dddd Latitude xx degrees mm minutes dddd decimal part of minutes lt N S gt Either character N or character S N North S South yyymm ddd Longitude yyy degrees mm minutes dddd decimal part of minutes lt E W gt Either character E or character W E East W West S S Speed knots h h Heading ddmmyy Date dd date mm month yy year d d Magnetic variation This value is available if magnetic model data has been stored to the flash memory available since firmware rev 1 08 lt E W gt Declination Either character E or character W E East W West Mode indicator A autonomous N data not valid 22 6 5 VTG Course Over Ground And Ground Speed Course and speed GPVTG h h T m m M 8s s N s 8 K M hh lt CR gt lt LF gt h h Heading T Degrees heading units m m Magnetic heading This value is available if magnetic model data has been stored to the flash memory available since firmware rev 1 08 M Degrees Magnetic heading units S S Speed knots N Knots Speed unit S S Speed km h K km h Speed units M Mode indicator A autonomous N data not valid 23 7 0 Appendix Datum IDS Table below defines all coordinate systems that PCM3292 supports with appropriate datum ids
37. rdinate system id See appendix for supported DATUM id s NOTE In order to preserve this setting after reset or power up the new setting has to be stored to flash memory by using the PFST STORE command 5 2 5 FIXRATE Set Fixrate Defines how often PCM3292 should acquire navigation fix and thus output the NMEA messages PFST FIXRATE lt fixrate gt lt fixrate gt Number of seconds to between navigation fixes NOTE In order to preserve this setting after reset or power up the new setting has to be stored to flash memory by using the PFST STORE command 5 2 6 SYNCMODE Synchronous NMEA Output Mode Enables or disables the synchronous NMEA output mode In the synchronous output mode all the enabled NMEA navigation messages are outputted approx once per second regardless of the availability of a valid navigation fix The synchronous mode is enabled by default 8PFST SYNCMODE lt mode gt lt mode gt Set synchronous mode on or off 0 off 1 on default NOTE In order to preserve this setting after reset or power up the new setting has to be stored to flash memory by using the PFST STORE command 5 2 7 STORE Store Current Parameter Set Stores the current parameter set in PCM3292 s flash memory These parameters include those that are defined by the commands ALTAID AUTOSTART CONF CABLEDEL DATUM FIXRATE NMEA PPSMODE PULSEPOL PULSELEN SETLIMIT SURVEYLEN and SYNCMODE PFST ST
38. s SS 30 SA1 OSC 31 SAO UN Se 32 UN UN a Low active 2 0 Jumper Settings Serial Port Select Jump No Define Note JP4 COM Short Enable Open Disable JP5 COM2 Short Enable Open Disable JP6 COM3 Short Enable Open Disable JP7 COM4 Short Enable Open Disable Jump No Define Note JP8 IRQ3 Short Enable Open Disable JP9 IRQ4 Short Enable Open Disable JP11 IROS Short Enable Open Disable JP12 IRQ7 Short Enable Open Disable Interrupt Port Select The default setting is COM3 IRQ5 Enable Enhance Jump No Define Note JP13 IRQ3 Short Enable Open Disable JP14 IRQ4 Short Enable Open Disable JP15 IRQ5 Short Enable Open Disable JP16 IRQ7 Short Enable Open Disable JP17 IRQ10 Short Enable Open Disable JP18 IRQ11 Short Enable Open Disable JP19 IRQ12 Short Enable Open Disable JP20 IRQ14 Short Enable Open Disable JP21 IRQ15 Short Enable Open Disable Note If you want to add on Enhance part please setting the jump of JP10 at enable before setting JP13 JP21 3 0 TMARK The TMARK pulse waveform is shown in Figure 1 This signal is a positive logic buffered CMOS level output pulse that transitions from a logic low condition to a logic high at a 1 Hz rate The TMARK output pulse rise times typically less than 2 nanoseconds and the pulse duratio
39. the module has already been navigating after the previous power up or if the time has been given by using the PFST INITAID command Valid ephemeris data is available if the module has been navigating within the last two hours and the navigation has been stopped properly by giving the PFST STOP command 6 1 2 STOP Stop Navigation Commands PCM3292 to stop navigating and enter the idle state While in idle state the PCM3292 receiver doesn t navigate but still accept commands less power is consumed in the idle state than in the navigation state however remarkably more than in the power down mode This command also stores the LastknownGood fix ephemeris and almanac data in flash memory PFST STOP lt 1 0 gt lt 1 0 gt 1 to save 0 not to save LastKknownGood fix ephemeris and almanac data to flash memory 5 1 2 PWRDOWN PCM3292 Sleep Mode Commands PCM3292 to sleep mode Using the sleep mode is recommended when navigation isn t needed PCM3292 consumes remarkably little power in the sleep mode and still re acquires the navigation fix quickly after waking up PCM3292 wakes up from the sleep mode when the timeout has expired If the receiver was navigating when the PWRDOWN command was given navigation will restart automatically after waking up from the sleep mode SPFST PWRDOWN lt hours gt lt minutes gt lt seconds gt 5 1 3 SW PCM3292 Software Revision Shows the firmware revision of the PCM
40. ve until user changes the start mode again Using NMEA logging start mode is configured with the command PFST LOGMODE dLog name The system stores a log name which has a user given log name text string and the index number of the log The default log name is Log Using NMEA log names can be configured with the command PFST LOGNAME 12 0 DOWNLOADING LOGGED DATA TO HOST The logged data can be downloaded to the host device using one of these alternative approaches e Using the NMEA protocol In this approach the CT5510 outputs the logged data to the NMEA serial port as standard NMEA messages e Using the iTalk protocol The binary iTalk protocol offers an efficient way for downloading the logged data to applications Downloading log data using NMEA CT5510 can output the log data through the NMEA serial port in standard NMEA message format The users may then capture and parse the outputted messages from the serial port by his her own means Depending on the data level settings that were used when logging the data it may be possible that not all the data required for generating complete NMEA messages are available in such case the missing data fields are replaced with Zeros The output is activated with the NMEA command PFST LOGGET 38 13 0 NMEA PROTOCOL SUPPORT CT5510 has a set of NMEA commands that can be used to control the logging system On the table below is a summary of the available NMEA l
41. y Direction of movement 6 11 Lat amp Lon Time Alt FixInfo HVel Dir Vertical velocity Configuring the filter settings Using NMEA Filter settings are configured with the command SPFST LOGSETTING Start modes Logging start mode controls if and how CT5510 should start logging when GPS navigation is started Depending on the start mode the system may create a new log each time when logging is started or continue using the old log so that new log points are appended after the old points The start mode also controls if logging starts only once at the next time when navigation starts or continuously so that logging always starts when navigation starts until again disabled by user Available start modes are described in the following table Start Mode Description 0 Logging disabled default 1 Logging is started so that a new log is created once when navigation is started for the next time On the consecutive navigation starts after that logging won t be used 2 The previous log is continued once when navigation is started for the next time On the consecutive navigation starts after that logging won t be used 3 Logging is started so that a new log is created each time when 37 navigation is started Logging is active until user changes the start mode again 4 The previous log is continued each time when navigation is started Logging is acti
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