From mboxrd@z Thu Jan 1 00:00:00 1970 References: <6D8D77BA-B884-43B8-B23B-69A1823EA275@hamnavoe.com> <3b747c78adce4081499331c846f49aca@hamnavoe.com> From: Bakul Shah Content-Type: multipart/alternative; boundary=Apple-Mail-8CAEB44D-32B8-4CF8-B937-54B5161FF907 In-Reply-To: Message-Id: Date: Mon, 7 Jul 2014 07:58:15 -0700 To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Subject: Re: [9fans] Fwd: Building a Raspberry Pi image / Keyboard support Topicbox-Message-UUID: 00f76a48-ead9-11e9-9d60-3106f5b1d025 --Apple-Mail-8CAEB44D-32B8-4CF8-B937-54B5161FF907 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable On one RPi I am using a GPS module. I need to add support for its PPS signal= for more accurate time keeping. > On Jul 7, 2014, at 7:39 AM, Skip Tavakkolian w= rote: >=20 > there are RTC modules for the pi (talk over i2c, based on DS1307 or DS3231= ). i use them with linux distro's and they seem to work fine. >=20 >=20 >=20 >> On Mon, Jul 7, 2014 at 6:59 AM, Richard Miller <9fans@hamnavoe.com> wrote= : >> > By the way, how I can arrage the correct time in this system? >> > I don't mean the /adm/timezone/local, because >> > in the usual PC, we can change it at BIOS screen. >>=20 >> Unlike a PC, the raspberry pi doesn't have a battery-backed >> real time clock. If you configure a kernel without the 'fakertc' >> device, it will prompt you to enter the time and date when you >> power on. For me this was too annoying, which is why I made the >> fakertc device. With a network connection, the time should be >> corrected by aux/timesync soon after booting. >=20 --Apple-Mail-8CAEB44D-32B8-4CF8-B937-54B5161FF907 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
On one RPi I am using a GPS module. I need to add support for its PPS signal for more accurate time keeping.

On Jul 7, 2014, at 7:39 AM, Skip Tavakkolian <skip.tavakkolian@gmail.com> wrote:

there are RTC modules for the pi (talk over i2c, based on DS1307 or DS3231). i use them with linux distro's and they seem to work fine.



On Mon, Jul 7, 2014 at 6:59 AM, Richard Miller <9fans@hamnavoe.com> wrote:
> By the way, how I can arrage the correct time in this system?
> I don't mean the /adm/timezone/local, because
> in the usual PC, we can change it at BIOS screen.

Unlike a PC, the raspberry pi doesn't have a battery-backed
real time clock.  If you configure a kernel without the 'fakertc'
device, it will prompt you to enter the time and date when you
power on.  For me this was too annoying, which is why I made the
fakertc device.  With a network connection, the time should be
corrected by aux/timesync soon after booting.



--Apple-Mail-8CAEB44D-32B8-4CF8-B937-54B5161FF907--