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author | Bertrik Sikken <bertrik@sikken.nl> | 2008-11-23 15:00:44 +0000 |
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committer | Bertrik Sikken <bertrik@sikken.nl> | 2008-11-23 15:00:44 +0000 |
commit | 078753395d8e184000ed3c08ef372783e997b3c0 (patch) | |
tree | 4b367fa5be60e5f0ea3ff6d5033b1beacfbc91a8 /firmware/target/arm/as3525/powermgmt-as3525.c | |
parent | 7ff34c40122edfc2364849a5e709076aa499a352 (diff) | |
download | rockbox-078753395d8e184000ed3c08ef372783e997b3c0.tar.gz rockbox-078753395d8e184000ed3c08ef372783e997b3c0.zip |
Implement a basic uncalibrated battery reading for all as3525 targets with a lithium battery.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19189 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/as3525/powermgmt-as3525.c')
-rw-r--r-- | firmware/target/arm/as3525/powermgmt-as3525.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/firmware/target/arm/as3525/powermgmt-as3525.c b/firmware/target/arm/as3525/powermgmt-as3525.c index ac1ee79f00..47e037684a 100644 --- a/firmware/target/arm/as3525/powermgmt-as3525.c +++ b/firmware/target/arm/as3525/powermgmt-as3525.c | |||
@@ -21,36 +21,53 @@ | |||
21 | 21 | ||
22 | #include "config.h" | 22 | #include "config.h" |
23 | #include "adc.h" | 23 | #include "adc.h" |
24 | #include "adc-target.h" | ||
24 | #include "powermgmt.h" | 25 | #include "powermgmt.h" |
25 | 26 | ||
26 | /* TODO */ | 27 | /* TODO |
28 | Each as3525 target should probably define its own battery properties | ||
29 | (dangerous/shutoff battery level, discharge/charge curves) in a file | ||
30 | called powermgmt-<target>.c in its own sub-directory. | ||
31 | |||
32 | For now, this file provides simple uncalibrated settings to get at least | ||
33 | a basic reading for all as3525 targets with a lithium battery. | ||
34 | */ | ||
27 | 35 | ||
28 | const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] = | 36 | const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] = |
29 | { | 37 | { |
30 | 0 | 38 | /* TODO: this is just an initial guess */ |
39 | 3400 | ||
31 | }; | 40 | }; |
32 | 41 | ||
33 | const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] = | 42 | const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] = |
34 | { | 43 | { |
35 | 0 | 44 | /* TODO: this is just an initial guess */ |
45 | 3300 | ||
36 | }; | 46 | }; |
37 | 47 | ||
38 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */ | 48 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */ |
39 | const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] = | 49 | const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] = |
40 | { | 50 | { |
41 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } | 51 | /* TODO: simple uncalibrated curve, linear except for first 10% */ |
52 | { 3300, 3390, 3480, 3570, 3660, 3750, 3840, 3930, 4020, 4110, 4200 } | ||
42 | }; | 53 | }; |
43 | 54 | ||
44 | #if CONFIG_CHARGING | 55 | #if CONFIG_CHARGING |
45 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */ | 56 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */ |
46 | const unsigned short percent_to_volt_charge[11] = | 57 | const unsigned short percent_to_volt_charge[11] = |
47 | { | 58 | { |
48 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 | 59 | /* TODO: simple uncalibrated curve, linear except for first 10% */ |
60 | 3300, 3390, 3480, 3570, 3660, 3750, 3840, 3930, 4020, 4110, 4200 | ||
49 | }; | 61 | }; |
50 | #endif /* CONFIG_CHARGING */ | 62 | #endif /* CONFIG_CHARGING */ |
51 | 63 | ||
64 | /* ADC should read 0x3ff=5.12V */ | ||
65 | #define BATTERY_SCALE_FACTOR 5125 | ||
66 | /* full-scale ADC readout (2^10) in millivolt */ | ||
67 | |||
52 | /* Returns battery voltage from ADC [millivolts] */ | 68 | /* Returns battery voltage from ADC [millivolts] */ |
53 | unsigned int battery_adc_voltage(void) | 69 | unsigned int battery_adc_voltage(void) |
54 | { | 70 | { |
55 | return 1; | 71 | return (adc_read(ADC_RTCSUP) * BATTERY_SCALE_FACTOR) >> 10; |
56 | } | 72 | } |
73 | |||