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This method can be also augmented by solution 2, for "default" shutdown threshold. | This method can be also augmented by solution 2, for "default" shutdown threshold. | ||
- | '''1.a gconf value plus guard time''' use a timer plus frequent probing to ensure the voltage stays below the threshold set by gconf. This is the recommended method since the whole shutdown shouldn't get triggered by sub-second "brownouts" caused by power consumption spikes. A suggested guard time is 30..60s, a suggested sampling frequency for voltage is 1/s, though the hardware has limited support for such high sampling frequencies of voltage - further evaluation needed. Other alternative concepts like average over moving window (again | + | '''1.a gconf value plus guard time''' use a timer plus frequent probing to ensure the voltage stays below the threshold set by gconf. This is the recommended method since the whole shutdown shouldn't get triggered by sub-second "brownouts" caused by power consumption spikes. A suggested guard time is 30..60s, a suggested sampling frequency for voltage is 1/s, though the hardware has limited support for such high sampling frequencies of voltage - further evaluation needed. Other alternative concepts like average over moving window (again widow size: 300..60s) might be worth to consider. |
Note that the high sampling frequency is only needed during the guard time. For moving window average this complicates the design a fair bit. | Note that the high sampling frequency is only needed during the guard time. For moving window average this complicates the design a fair bit. |
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