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aucun résumé de modification
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== Introduction ==
Now that we have the module wired up and verified that you can see the module with i2cdetect, we can set up the module.
{{ambox-stop|text=Don't forget to set up I2C in the previous step! }}
== Raspbian Jessie (Systemd) ==
You can add support for the RTC by adding a device tree overlay. Run
sudo nano /boot/config.txt
to edit the pi configuration and add whichever matches your RTC chip:
dtoverlay=i2c-rtc,ds1307
or
dtoverlay=i2c-rtc,pcf8523
or
dtoverlay=i2c-rtc,ds3231
to the end of the file
{{ADFImage|RASP-PCF8523-Fixer-Heure-00.png}}
Save it and run {{fname|sudo reboot}} to start again. Log in and run {{fname|sudo i2cdetect -y 1}} to see the UU show up where 0x68 should be
{{ADFImage|RASP-PCF8523-Fixer-Heure-01.png}}
<nowiki>sudo apt-get -y remove fake-hwclock
sudo update-rc.d -f fake-hwclock remove</nowiki>
Disable the "fake hwclock" which interferes with the 'real' hwclock
{{ADFImage|RASP-PCF8523-Fixer-Heure-02.png}}
Now with the fake-hw clock off, you can start the original 'hardware clock' script.
Run {{fname|sudo nano /lib/udev/hwclock-set}} and comment out these three lines:
<nowiki>#if [ -e /run/systemd/system ] ; then
# exit 0
#fi</nowiki>
{{ADFImage|RASP-PCF8523-Fixer-Heure-03.png}}
== Fixer l'heure de la RTC ==
When you first plug in the RTC module, it's going to have the wrong time because it has to be set once. You can always read the time directly from the RTC with {{fname|sudo hwclock -D -r}}
{{ADFImage|RASP-PCF8523-Fixer-Heure-10.png}}
{{RASP-PCF8523-TRAILER}}
{{RASP-PCF8523-TRAILER}}