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Groups > comp.mobile.android > #33473
| From | Nigel Wade <nmw@local.domain> |
|---|---|
| Newsgroups | comp.mobile.android |
| Subject | Re: How does an app estimate charging current? |
| Date | 2016-08-17 15:50 +0100 |
| Message-ID | <e1jbu9FdeccU1@mid.individual.net> (permalink) |
| References | <nor8g4$jh1$1@gioia.aioe.org> <nosdg8$dku$3@dont-email.me> <nosr4m$1gk$1@dont-email.me> <nou7ct$gtd$1@gioia.aioe.org> |
On 16/08/16 06:13, Aardvarks wrote: > I can "see" that file by opening up the Android terminal emulator to type: > cd/sys/class/power_supply/battery/ > ... > cat current_now (No such file or directory) > cat current_avg (0) > cat current_max (No such file or directory) > ... > ls batt* (lots of stuff) > > I think all the current apps just read one or more of those files. > But HOW does the current get*into* those files? /sys is a pseudo-filesystem which provides direct hooks into the kernel device drivers. The "files" are not actual files, and when you read from them you are actually reading the kernel/device driver data structures directly. So, nothing actually writes any values into /sys/class/power_supply/battery/
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How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-15 02:13 +0000
Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-15 06:31 -0600
Re: How does an app estimate charging current? David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2016-08-15 17:37 +0100
Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-16 05:13 +0000
Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-16 05:28 -0600
Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-16 13:43 +0000
Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-17 04:59 -0600
Re: How does an app estimate charging current? David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2016-08-16 17:07 +0100
Re: How does an app estimate charging current? Nigel Wade <nmw@local.domain> - 2016-08-17 15:50 +0100
Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-17 17:12 +0000
Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-16 05:22 -0600
Re: How does an app estimate charging current? pamela <invalid@nospam.com> - 2016-08-16 21:07 +0100
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