Does the BBB use the TPS65217 RTC to keep system time while powered, but not synchronized to any NTP server?
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Does the BBB use the TPS65217 RTC to keep system time while powered, but not synchronized to any NTP server?
No, the beaglebone uses the tsp65217c "real-time clock" to bring up the power rails on the beaglebone in the correct order, and all the other interresting power things. Such as charge batteries, etc. In other words, the tsp65217c is not a real-time clock. It's a power management IC.
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That part is a power management IC not a RTC there is a built in RTC in the processor that will not keep
time when powered down.
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By the way, you can use /dev/rtc0 just like any other real-time clock. Search the internet for "linux how to use real-time clock"
On Fri, Aug 19, 2016 at 9:29 PM, William Hermans <yyr...@gmail.com> wrote:
$ ls /sys/devices/platform/ocp/44e3e000.rtc/rtc
rtc0
On Fri, Aug 19, 2016 at 1:25 PM, <test...@gmail.com> wrote:
On Friday, August 19, 2016 at 3:55:34 PM UTC-4, Wulf Man wrote:That part is a power management IC not a RTC there is a built in RTC in the processor that will not keep
time when powered down.
Oh, my mistake. I was under the impression that part had a RTC, but lost time when powered down. See here: https://groups.google.com/forum/#!category-topic/beagleboard/vnu8sC9fgYo
In any case, if the RTC is in the processor, is there any way to enable it as I described? I'm interested in using it to keep more accurate time when power is ON; I have another means of setting the initial time correctly.
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Rtc0 is already used by default...
Le sam. 20 août 2016 06:30, William Hermans <yyr...@gmail.com> a écrit :
By the way, you can use /dev/rtc0 just like any other real-time clock. Search the internet for "linux how to use real-time clock"
On Fri, Aug 19, 2016 at 9:29 PM, William Hermans <yyr...@gmail.com> wrote:
$ ls /sys/devices/platform/ocp/44e3e000.rtc/rtc
rtc0
On Fri, Aug 19, 2016 at 1:25 PM, <test...@gmail.com> wrote:
On Friday, August 19, 2016 at 3:55:34 PM UTC-4, Wulf Man wrote:That part is a power management IC not a RTC there is a built in RTC in the processor that will not keep
time when powered down.
Oh, my mistake. I was under the impression that part had a RTC, but lost time when powered down. See here: https://groups.google.com/forum/#!category-topic/beagleboard/vnu8sC9fgYo
In any case, if the RTC is in the processor, is there any way to enable it as I described? I'm interested in using it to keep more accurate time when power is ON; I have another means of setting the initial time correctly.
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By the way, you can use /dev/rtc0 just like any other real-time clock. Search the internet for "linux how to use real-time clock"
that's probably in the TRM.
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