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author | Vitja Makarov <vitja.makarov@gmail.com> | 2008-12-21 19:16:54 +0000 |
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committer | Vitja Makarov <vitja.makarov@gmail.com> | 2008-12-21 19:16:54 +0000 |
commit | 19413fc8060fb80eae668ddfdf3c4fa7e751e5b4 (patch) | |
tree | af22ea8e93f0b752fe43f012cbbe57656dcf14ba /firmware/target/arm/tcc77x/iaudio7 | |
parent | f6789a7d7316c284e33a2ebbdf86d147ce703993 (diff) | |
download | rockbox-19413fc8060fb80eae668ddfdf3c4fa7e751e5b4.tar.gz rockbox-19413fc8060fb80eae668ddfdf3c4fa7e751e5b4.zip |
iaudio7: add battery voltage monitoring
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19549 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/tcc77x/iaudio7')
-rw-r--r-- | firmware/target/arm/tcc77x/iaudio7/powermgmt-iaudio7.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/firmware/target/arm/tcc77x/iaudio7/powermgmt-iaudio7.c b/firmware/target/arm/tcc77x/iaudio7/powermgmt-iaudio7.c new file mode 100644 index 0000000000..e391ada10a --- /dev/null +++ b/firmware/target/arm/tcc77x/iaudio7/powermgmt-iaudio7.c | |||
@@ -0,0 +1,84 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: powermgmt-cowond2.c 17847 2008-06-28 18:10:04Z bagder $ | ||
9 | * | ||
10 | * Copyright (C) 2007 by Karl Kurbjun | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "config.h" | ||
23 | #include "adc.h" | ||
24 | #include "powermgmt.h" | ||
25 | #include "kernel.h" | ||
26 | #include "pcf50606.h" | ||
27 | |||
28 | unsigned short current_voltage = 5150; | ||
29 | |||
30 | const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] = | ||
31 | { | ||
32 | /* FIXME: calibrate value */ | ||
33 | 3380 | ||
34 | }; | ||
35 | |||
36 | const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] = | ||
37 | { | ||
38 | /* FIXME: calibrate value */ | ||
39 | 3300 | ||
40 | }; | ||
41 | |||
42 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */ | ||
43 | const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] = | ||
44 | { | ||
45 | /* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */ | ||
46 | { 4500, 4810, 4910, 4970, 5030, 5070, 5120, 5140, 5170, 5250, 5400 } | ||
47 | }; | ||
48 | |||
49 | #if CONFIG_CHARGING | ||
50 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */ | ||
51 | const unsigned short percent_to_volt_charge[11] = | ||
52 | { | ||
53 | /* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */ | ||
54 | 4760, 5440, 5510, 5560, 5610, 5640, 5660, 5760, 5820, 5840, 5850 /* NiMH */ | ||
55 | }; | ||
56 | #endif /* CONFIG_CHARGING */ | ||
57 | |||
58 | #define BATTERY_SCALE_FACTOR 6000 | ||
59 | /* full-scale ADC readout (2^10) in millivolt */ | ||
60 | |||
61 | /* Returns battery voltage from ADC [millivolts] */ | ||
62 | unsigned int battery_adc_voltage(void) | ||
63 | { | ||
64 | static unsigned last_tick = 0; | ||
65 | |||
66 | if (0 == last_tick || TIME_BEFORE(last_tick+HZ, current_tick)) | ||
67 | { | ||
68 | int adc_val, irq_status; | ||
69 | unsigned char buf[2]; | ||
70 | |||
71 | irq_status = disable_irq_save(); | ||
72 | pcf50606_write(PCF5060X_ADCC2, 0x1); | ||
73 | pcf50606_read_multiple(PCF5060X_ADCS1, buf, 2); | ||
74 | restore_interrupt(irq_status); | ||
75 | |||
76 | adc_val = (buf[0]<<2) | (buf[1] & 3); //ADCDAT1H+ADCDAT1L | ||
77 | current_voltage = (adc_val * BATTERY_SCALE_FACTOR) >> 10; | ||
78 | |||
79 | last_tick = current_tick; | ||
80 | } | ||
81 | |||
82 | return current_voltage; | ||
83 | } | ||
84 | |||