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mission:log:2015:02:06:patching-kernel-ntp-to-fix-odroid-armv7a-chrony-adjtimex-bug [2015/02/07 17:42] – created chrono | mission:log:2015:02:06:patching-kernel-ntp-to-fix-odroid-armv7a-chrony-adjtimex-bug [2015/02/07 19:36] – [Hacking a new RTC power supply with a goldcap capacitor] chrono | ||
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- | After patching the odroid sources with the recommended one from the bugtracker chronyd is working like a charm again. So if you're having issues with newer kernels (at least from an embedded perspective), | + | After patching the odroid sources with the recommended one from the bugtracker chronyd is working like a charm again. So if you're having issues with newer kernels (at least from an embedded perspective), |
===== Hacking a new RTC power supply with a goldcap capacitor ===== | ===== Hacking a new RTC power supply with a goldcap capacitor ===== | ||
- | The Odroid C1 also comes with another not so obvious pitfall: The RTC power supply. The optional RTC battery, you can usually buy wherever you can buy the Odroid itself, is the only power supply for the RTC. Meaning: When you don't have this battery, the RTC will not get powered at all (not even when your system is powered and running) so in order to get the RTC working, you need to feed power to the RTC Header. | + | The Odroid C1 also came with another not so obvious pitfall: The RTC power supply. The optional RTC battery, you can usually buy wherever you can buy the Odroid itself, is the only power supply for the RTC. Meaning: When you don't have this battery, the RTC will not get powered at all (not even when your system is powered and running) so in order to get the RTC working |
- | A quick glance in the schematics revealed the secret: | + | U15 (XC6215B0927R-G) is a highly precise, low noise, positive voltage LDO regulator |
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+ | Since using a battery seemed kinda backwards and there was a 5.5V 1F goldcap | ||
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