How do I discern Maidenhead Locator from GPS lat long info.

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  1. - 25th May 2018, 20:54 #31
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    astanapane
    astanapane is offline Senior Member
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    Default Re: How do I discern Maidenhead Locator from GPS lat long info.

    ok i'm stack.

    i place my code up to now. I dont want anyone to write a code for me, i just want from you to give me direction to solve my following problem.

    I know i have many mistakes and maybe i aproach the code in a wrong way, in a difficult direction.

    So one of my problems i would like to solve, is to give the right time, in 24H.

    I have in mind that i need to use interrupts.

    Is there any solution at the moment to use the SEROUT2 command

    Code:
    serout2  lcd,32,[$73,$00,$04,$00,$FF,$E0,"  TIME: ",dec2 hh+3," :",dec2 mm," :",dec2 ss,$00]
pause 100
    and jump at a label ???

    Code:
    Plusthree:
  hh = hh + 3
  IF hh = 25 THEN hh = 0  
RETURN
    I would like first to solve time issue, even if i have to refresh/clear the display.....then my next problem to solve is to keep the data on the screen and replace only the numbers or characters needed to be change.

    Following is the code up to now.

    Code:
    '*  Author  : LEONARDO BILALIS                                  *
'*  Notice  : Copyright (c) 2017 [LEONARDOS BILALIS]            *
'*          : All Rights Reserved                               *
'*  Date    : 24/5/2018                                         *
'*  Version : 1.0                                               *
'*  Notes   : This is a GPS                          * 
'*          :                                                   *
'****************************************************************

@ ERRORLEVEL -306 ; this command prevents the compiler to give you a notice of
                  ; crossing page boundary - make sure bits are set 

@ __config _CONFIG1, _HS_OSC & _WDT_OFF & _LVP_OFF & _CP_OFF

Include "MODEDEFS.BAS"
DEFINE OSC 8   
OSCCON=%01111000     '8 Mhz
CMCON = 7            'turn comparators off
ANSEL = 0            'All digital
PORTB = 0            'make low all ports at B range
input portb.0        'make input portb.0

'-----------------------------------------------------------------------------/
'                           [ ULCD 1'44 4D System ]                          /
'---------------------------------------------------------------------------/

' "o" degree character is manual created for degree value 

'----------------------------------------------------------------------------/
'                              [ PIC Variables ]                            /  
'--------------------------------------------------------------------------/

PWRLED      var     PORTb.1   ; this shows that the initialization is finished
LCD         var     PORTb.2   ; to LCD operation
GPS_TX      var     PORTb.0   ; info from GPS 
GPS_RX      var     PORTb.4   ; COMMANDS TO GPS
Testled     var     PORTb.5 
dots        var     byte
dots = 22
countremain var     byte      ; we use a countremain to check the incoming from portb.0  
pause 1000

' --------------------[ GPS Variables for NMEA sentenses ]---------------------/
'                                                                             /
'   $GPRMC,090045.000,A,3823.6645,N,02353.3600,E,0.02,195.80,170518,,,A*62   /
'   $GNGGA,140405.000,3823.6010,N,02353.3054,E,1,9,0.88,0.8,M,35.9,M,,*40   /
'                                                                          /
'-------------------------------------------------------------------------/
Timeout     con     2000
hh          var     byte    'hours
mm          var     byte    'minutes
ss          var     byte    'seconds  
sss         var     word    'milisecs
degrees		VAR     BYTE	'latitude/longitude degrees
minutes		VAR		BYTE	'latitude/Longitude minutes
minutesD	VAR		word	'latitude/LONGITUDE DECIMAL MINUTES
dir       	VAR     BYTE   	' direction (latitude: 0 = N, 1 = S / longitude: 0 = E, 1 = W)
degrees2	VAR     BYTE	'latitude/longitude degrees
minutes2	VAR		BYTE	'latitude/Longitude minutes
minutesD2	VAR		word	'latitude/LONGITUDE DECIMAL MINUTES
dir2        var     byte    ;direction (latitude: 0 = N, 1 = S / longitude: 0 = E, 1 = W)
SatNo   	VAR		BYTE	'number of satellites connected
knots       var     word    'speed over ground
knots2      var     byte    'speed over ground
course      var     word    'course
course2     var     byte    'course
day         var     byte    'day
month       var     byte    'month
year        var     byte    'year
i           var     word    
GNRMC       var     word    'protocol
GNGGA       var     WORD    'protocol
FIX         var     word    'fix sat V/A
Modefix     var     byte    'mode fix 1 or 2 or 3 depens
horizon     var     byte
precision   var     byte
meter       var     byte
METERS      var     byte
Meters2     var     byte

marker2     var     byte    'UTC OR GRT (GREEK TIME)

' -------------------------------------------------------------------------/  
'                          [ LCD Initialization ]                         /
'------------------------------------------------------------------------/

serout2 LCD,32,[$55]      ' uOLED Initialize
pause 2000
serout2 lcd,32,[$56,$01]
pause 1000
serout2 lcd,32,[$45]      ' clear the lcd
pause 500
serout2 lcd,32,[$55]
pause 500
serout2 lcd,32,[$45]      ' clesr the lcd
pause 500
serout2 lcd,32,[$73,$00,$03,$11,$ff,$ff," Leonardo Bilalis",$00]
pause 200                       
serout2 lcd,32,[$73,$02,$06,$10,$ff,"     Copyright 2018",$00]
pause 3000
serout2 lcd,32,[$45]
pause 1000
serout2 lcd,32,[$73,$02,$06,$10,$ff,$ff,"      GPS.........",$00]
pause 500
serout2 lcd,32,[$45]
pause 200

'----------------------------------------------------------------------/
'     [ After the lcd initialization we power the Led at PIC ]        /
'--------------------------------------------------------------------/

HIGH pwrled


'----------------------sent a centence to gps------------------------

;serout gps_rx,84,[$PMTK_103*30]
pause 100

'-------------------------------------------------------------------/
'                         [MAIN Program]                           /
'-----------------------------------------------------------------/

Main: 
;gosub clearlcd

serin2 gps_tx,84,[countremain]      ; we check what is coming from the port
if countremain = 0 then lostcable   ; if nothing is coming the we check the cable

;gosub clearlcd
'-------------------------------------------------------------------------------/
'                                                                              /
'                    [ Example NMEA Sentense of GNRMC ]                       /
' [$GNRMC,090045.000,A,3823.6645,N,02353.3600,E,0.02,195.80,170518,,,A*62]   /
'                                                                           /
'--------------------------------------------------------------------------/

serin2  gps_tx,84,[wait("$GNRMC"),_                ;we wait for $GNRMC
wait(","),dec2 hh,dec2 mm,dec2 ss,wait("."),dec3 sss,_          ;we wait for 090045.000 which is the time when we got the info
wait(","),fix,_                                                 ;we wait for A
wait(","),dec2 degrees,dec2 minutes,wait("."),dec4 minutesd,_   ;we wait for 3823.6645
wait(","),dir,_                                                 ;we wait for N 
wait(","),dec3 degrees2,dec2 minutes2,wait("."),dec4 minutesd2,_;we wait for 02353.3600
wait(","),dir2,_                                                ;we wait for E
wait(","),dec1 knots,wait("."),dec2 knots2,_                    ;we wait for 0.02
wait(","),dec3 course,wait("."),dec2 course2,_                  ;we wait for 195.80
wait(","),dec2 day,dec2 month,dec2 year]                        ;we wait for 170518

pause 500

'------------------------------------------------------------------------------/
'                                                                             /
'                     [ Example NMEA Sentense of GNGGA ]                     /
' [$GNGGA,140405.000,3823.6010,N,02353.3054,E,1,9,0.88,0.8,M,35.9,M,,*40    /           
'                                                                          /
'-------------------------------------------------------------------------/

serin2 gps_tx,84,[wait("$GNGGA"),_                              ;we wait for GNGGA
wait(","),dec2 hh,dec2 mm,dec2 ss,wait("."),dec3 sss,_          ;we wait for 140405.000 which is the time when we got info 
wait(","),dec2 degrees,dec2 minutes,wait("."),dec4 minutesd,_   ;we wait for 3823.6010 longitude
wait(","),dir,_                                                 ;we wait for the N/S
wait(","),dec3 degrees2,dec2 minutes2,wait("."),dec4 minutesd2,_;we wait for 02353.3054 latitude
wait(","),dir2,_                                                ;we wait for E/W
wait(","),modefix,_                                             ;we wait for modefix 1,2 or 3 check gps manual for NMEA
wait(","),dec2 satno,_                                          ;we wait for the number of fixed satellites, this is impoetant info
wait(","),dec3 horizon,dec precision,_                          ;we wait for horizon
wait(","),meter,dec2 METERS,dec Meters2]                        ;we wait for the meters 

pause 100


'---------------------------------------------------------------------------------/
' Here if the GPS module havent been fixed to any satellite will jump to notfix  /
'-------------------------------------------------------------------------------/

if fix = "V" then notfix                                                        
pause 100

'-----------------------------------------------------------------------------/
'                           [ Return from notfix ]                           /
'                   [ We clear any character on the display ]               /
'--------------------------------------------------------------------------/

gosub clearlcd
;serout2 lcd,32,[$45]
;pause 500


'--------------------------------------------------------------------------/
' here is where the code dispays the stored info from the NMEA sentenses  /
'------------------------------------------------------------------------/

serout2 lcd,32,[$73,$03,$00,$00,$FF,$FF,"Protocol:","NMEA",$00]
pause 100
serout2 lcd,32,[$73,$01,$02,$01,$07,$E0,"Date:",dec2 day,"/",dec2 month,"/",dec2 year,$00]
pause 100
serout2  lcd,32,[$73,$00,$04,$00,$FF,$E0,"  TIME: ",dec2 hh+3," :",dec2 mm," :",dec2 ss,$00]
pause 100
serout2 lcd,32,[$73,$00,$07,$00,$FF,$FF," Satellites",$00] 
pause 100
serout2 lcd,32,[$73,$03,$09,$11,$07,$FF,dec2 satno,$00]
pause 100
serout2 lcd,32,[$73,$00,$07,$00,$FF,$FF,"               Fixed",$00]
pause 100
serout2 lcd,32,[$73,$0D,$09,$11,$07,$FF,fix,$00]
pause 100
serout2 lcd,32,[$73,$00,$0B,$00,$ff,$ff,"Lat : ",dec2 degrees,"*",dec2 minutes,"'",dec4 minutesd," ",dir,$00]
pause 100
serout2 lcd,32,[$73,$00,$0D,$00,$ff,$ff,"Lon : ",dec3 degrees2,"*",dec2 minutes2,"'",dec4 minutesd2," ",dir2,$00]
pause 100
;serout2 lcd,32,[$73,$00,$0C,$00,$ff,$ff,"GND SPEED : ",(dec knots,".",dec2 knots2)*/1.852,$00]
;pause 200
;serout2 lcd,32,[$73,$00,$0E,$00,$ff,$ff,"Meters : ",dec2 METERS,dec Meters2,$00]
pause 5000
serout2 lcd,32,[$45]  ' clears the LCD 
pause 100

        goto main

'-----------------------------------------------------------------------------/
'                              [ SUB ROUTINES ]                              /
'---------------------------------------------------------------------------/

notfix:     ' Still looking for fixed signal
 
serout2 lcd,32,[$73,$00,$03,$11,$ff,$ff,"   Waiting for GPS",$00]
pause 100
serout2 lcd,32,[$73,$03,$06,$10,$ff," Time:",dec2 hh+3," :",dec2 mm," :",dec2 ss,$00]
pause 1000
serout2 lcd,32,[$73,$00,$08,$10,$ff,rep "." \22,$00]

pause 200
serout2 lcd,32,[$45]  ' clears the LCD 
pause 100

goto main       'returns to main    

lostcable:

serout2 lcd,32,[$73,$00,$03,$11,$ff,$ff,"   Connection lost",$00]
pause 100
serout2 lcd,32,[$73,$01,$06,$10,$ff,"   Please check cable",$00]
pause 2000
serout2 lcd,32,[$45]  ' clears the LCD 
pause 100

goto main

'-------------------------------------------------------------------------/
'                      GREEK TIME and Correcrion                         /
'-----------------------------------------------------------------------/

' at the moment this is not connected to any part of the code
Plusthree:
  hh = hh + 3
  IF hh = 25 THEN hh = 0  
RETURN  
'---------------------------------------------------------------------------/
'                              [ CLEAR LCD ]                               /
'-------------------------------------------------------------------------/

Clearlcd:
serout2 lcd,32,[$45]
pause 500
RETURN
    Last edited by astanapane; - 25th May 2018 at 20:56.
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