GitHub - drehscheibe/ublox_localtime: takes UTC time from GPS satellites via ublox NEO-6 (or later) chip and shows local time (CET and CEST), weekday and ISO calendar week; provides self-contained small calendar library for calculation of daylight savings time (after EU rules) and ISO calendar week

drehscheibe / ublox_localtime Public

Notifications You must be signed in to change notification settings
Fork 0
Star 3

takes UTC time from GPS satellites via ublox NEO-6 (or later) chip and shows local time (CET and CEST), weekday and ISO calendar week; provides self-contained small calendar library for calculation of daylight savings time (after EU rules) and ISO calendar week

MIT license

3 stars 0 forks Branches Tags Activity

Star

Notifications

Branches Tags

Name		Name	Last commit message	Last commit date
Latest commit History 9 Commits
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README		README
calendar.c		calendar.c
calendar.h		calendar.h
fletcher.c		fletcher.c
fletcher.h		fletcher.h
main.c		main.c

Repository files navigation

ublox_localtime configures a ublox neo-6 (or later) GPS receiver chip to send
binary UBX NAV_TIMEUTC messages over the USB-serial interface. The received time
is then converted to local time CET/MEZ (A time, UTC +1) or CEST/MESZ (B time,
UTC +2) according to the DST rules of the EU (switch at 0100 UTC on the last
Sunday in March and October). Date and time is displayed once per second together
with the weekday and the ISO calendar week number.

The sole purpose of this project is to play with the ublox receiver and to
prepare for its use in an MCU clock project using libopencm3 and libnewlib.
That's why the core elements of this code don't depend on sophisticated
libraries and the calendar functions don't make plausibility checks for
arguments. This is left as an exercise to the user.  :-)




To get and build the latest source, do this:

  $ git clone https://github.com/drehscheibe/ublox_localtime.git
  $ cd ublox_localtime/
  $ make

  $ make help
  $ make DEBUG=1

The code is licensed under the MIT license as specified in file LICENSE.