blob: f8ea754ecc28df715b1590b54abc783909d20f2f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
-- Copyright 2016 Benjamin Barenblat
--
-- Licensed under the Apache License, Version 2.0 (the “License”); you may not
-- use this file except in compliance with the License. You may obtain a copy
-- of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an “AS IS” BASIS, WITHOUT
-- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-- License for the specific language governing permissions and limitations under
-- the License.
module Pandora
( chargePercent
, chargeCurrent
, chargingEnabled
, setCharging
) where
import Control.Applicative ((<$>))
import System.FilePath ((</>))
fuelGauge :: String
fuelGauge = "/sys/class/power_supply/bq27500-0"
acCharger :: String
acCharger = "/sys/class/power_supply/twl4030_ac"
chargePercent :: IO Int
chargePercent = read <$> readFile (fuelGauge </> "capacity")
-- | Determines the charge current in microamperes (µA).
chargeCurrent :: IO Int
chargeCurrent = read <$> readFile (fuelGauge </> "current_now")
chargingEnabled :: IO Bool
chargingEnabled = do
t <- readFile (acCharger </> "enable")
return $ case t of
"0\n" -> False
"1\n" -> True
_ -> error "no parse"
setCharging :: Bool -> IO ()
setCharging = writeFile (acCharger </> "enable") . showAsInt
showAsInt :: Bool -> String
showAsInt False = "0"
showAsInt True = "1"
|