How to extract data from neo 6m gps module

Log in or register to post comments
Go To Last Post
61 posts / 0 new
View All

Pages

asking
asking's picture
Level: Hangaround
Joined: Fri. May 30, 2014
Posts: 233 View posts
Posted by asking: Thu. Jul 10, 2014 - 06:50 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Finally i have parsed the data and displayed time on the 16x2 Display. But i've issue regarding how to add +5.30 Time zone for india to current UTC time. any idea from friends here would help me to save my time...

Its not just simple to add 5hour to hour register and 30 minutes to min ones.. because when it would be 23 hours + 5 means it will show 28...and that's mess. so how to overcome this issue..

Top
awneil
awneil's picture
Level: 10k+ Postman
Joined: Fri. Jul 1, 2005
Posts: 15843 View posts
Location: Basingstoke, Hampshire, UK
Posted by awneil: Thu. Jul 10, 2014 - 07:35 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

So you just handle the overflow from hours to days...

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
Top
Kartman
Kartman's picture
Level: 10k+ Postman
Joined: Thu. Dec 30, 2004
Posts: 22139 View posts
Location: Melbourne,Australia
Posted by Kartman: Thu. Jul 10, 2014 - 10:21 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

One common method is to convert time to seconds add/subtract your offset then convert back to 'real' time. Its a common problem.

Top
clawson
clawson's picture
Level: Moderator
Joined: Mon. Jul 18, 2005
Posts: 96098 View posts
Location: (using avr-gcc in) Finchingfield, Essex, England
Posted by clawson: Fri. Jul 11, 2014 - 08:51 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

One common method is to convert time to seconds add/subtract your offset then convert back to 'real' time. Its a common problem.

Does your compiler offer functions like localtime() and mktime() ?

Top
JohanEkdahl
JohanEkdahl's picture
Level: 10k+ Postman
Joined: Wed. Mar 27, 2002
Posts: 26988 View posts
Location: Lund, Sweden
Posted by JohanEkdahl: Fri. Jul 11, 2014 - 09:16 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:
Its not just simple to add 5hour to hour register and 30 minutes to min ones..

I'll paraphrase resident 'freak David Prentice: Sit dow and do a few such additions on paper. Then think. Perhaps make a cup of tea. Then think again.

Then implement in a C function what you just did on paper.

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here. 

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

Top
asking
asking's picture
Level: Hangaround
Joined: Fri. May 30, 2014
Posts: 233 View posts
Posted by asking: Fri. Jul 11, 2014 - 09:20 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

clawson wrote:
Quote:

One common method is to convert time to seconds add/subtract your offset then convert back to 'real' time. Its a common problem.

Does your compiler offer functions like localtime() and mktime() ?

i am using Atmel Studio 6 with GCC compiler. i don't know whether it supports..?

Top
clawson
clawson's picture
Level: Moderator
Joined: Mon. Jul 18, 2005
Posts: 96098 View posts
Location: (using avr-gcc in) Finchingfield, Essex, England
Posted by clawson: Fri. Jul 11, 2014 - 09:29 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

i am using Atmel Studio 6 with GCC compiler. i don't know whether it supports..?

It doesn't have it in the currently issued version but in the "next" version you should find the functions added. In the meantime you can "cherry pick" what you need from here:

http://svn.savannah.nongnu.org/v...

Top
awneil
awneil's picture
Level: 10k+ Postman
Joined: Fri. Jul 1, 2005
Posts: 15843 View posts
Location: Basingstoke, Hampshire, UK
Posted by awneil: Fri. Jul 11, 2014 - 12:17 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

If you need the full date/time arithmetic - complete with days, months, leap years, etc - then you should use the functions.

If you just want a correct roll-over of the hours, then that's just simple arithmetic...

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
Top
asking
asking's picture
Level: Hangaround
Joined: Fri. May 30, 2014
Posts: 233 View posts
Posted by asking: Fri. Jul 11, 2014 - 03:16 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Yes i just want time...so i will use simple asthmatics i have some idea will post once successful..

Top
asking
asking's picture
Level: Hangaround
Joined: Fri. May 30, 2014
Posts: 233 View posts
Posted by asking: Fri. Jul 11, 2014 - 04:04 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Finally i have little success in converting simple arithmetic calculations.. as below

i have added +5.30 for Indian standard time

hour = nmea.getHour();
minute = nmea.getMinute();
hour = hour + 5;
minute = minute + 30; 
if(minute > 59)
{
minute = minute - 60;
hour = hour + 1;
} 
if(hour > 23)
{
hour = hour - 24;
}
Top

Pages

View All