JohnSwenson wrote: > This wait for network to start jivelite may be problamatic. I know there > are going to be a fair number of people that will want to run with the > embedded LMS and have no network connection at all. Their only interface > to the system will be with jivelite. That is going to make it difficult > for those people. > > On the issue of RTC and time, we have to be careful about this, the > wandboard module does not allow for a battery backed up RTC. The EDM > spec has a pin for this but the wandboard module does not connect > anything to this. The RTC power pin of the processor is directly > connected to a regulator on the module, there is no way to change this > without doing surgery on the module. > > Thus upon a powerup boot the clock is going to be reset, so it has to be > set externally, either NTP or some other means. For those running > without a network connection the only way they have to set the time is > through jivelite, if jivelite doesn't start until the time is set they > are in a bit of a catch22. > > The only way I have been able to come up with an RTC that runs during > power off is to put one on the carrier with a supercap or some such. The > processor could then query the carrier RTC over I2C at boot time to set > IT'S RTC. Of course it would have to make sure it set the carrier RTC > when updating the time from NTP or manually. > > Currently CSP1 doesn't have an RTC, but it's not too hard to add one. I > could even do a little board that has an RTC and supercap that plugs > into an appropriate IO connector on the wandboard to test this out. > > John S.
We may be able to drop the network check - its the change of time by a large amount when ntp synchronises which caused jivelite to lock up. I haven't looked in detail where yet. ------------------------------------------------------------------------ Triode's Profile: http://forums.slimdevices.com/member.php?userid=17 View this thread: http://forums.slimdevices.com/showthread.php?t=98544 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
