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iPod Classic/6G: fix battery voltage ADC scale

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Scale battery voltage ADC readings by 1023 instead of 1000,
using ADC1 (substractor) instead of ADC0 (multiplicator) to
get better resolution.

Percent charge/discharge tables are also modified to return
a similar value than the old ones.

Change-Id: I2951c75faa02f4302599ec24f9156cfd209c36eb
This commit is contained in:
Cástor Muñoz 2013-01-09 21:01:22 +01:00
parent d798c721e5
commit 1d901a82fd
2 changed files with 5 additions and 5 deletions
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2
firmware/target/arm/s5l8702/ipod6g/pmu-ipod6g.c
View file

@ -73,7 +73,7 @@ int pmu_read_adc(unsigned int adc)
/* millivolts */
int pmu_read_battery_voltage(void)
{
return pmu_read_adc(0) * 6;
return (pmu_read_adc(1) * 2000 / 1023) + 2250;
}
/* milliamps */

8
firmware/target/arm/s5l8702/ipod6g/powermgmt-ipod6g.c
View file

@ -27,25 +27,25 @@
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
3600
3500
};
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
3350
3300
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
{ 3600, 3730, 3780, 3810, 3840, 3880, 3930, 3990, 4080, 4170, 4270 }
{ 3500, 3670, 3720, 3750, 3770, 3800, 3860, 3920, 3980, 4070, 4170 }
};
#if CONFIG_CHARGING
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
3800, 3900, 3990, 4070, 4140, 4200, 4250, 4290, 4320, 4340, 4350
3700, 3820, 3900, 3950, 3990, 4030, 4070, 4120, 4170, 4190, 4200
};
#endif /* CONFIG_CHARGING */