FreeCalypso > hg > ffs-data-bundle
comparison charging/c1xx/standard @ 1:fa09662fe3e2
batteries, charging: import from fc-battery-conf repository
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Mon, 04 Apr 2022 07:56:53 +0000 |
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| 0:6ef2edd7ab6d | 1:fa09662fe3e2 |
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| 1 # This is the "standard" charging config for Mot C1xx phones running | |
| 2 # FreeCalypso fw. The key points are: | |
| 3 # | |
| 4 # 1) The battery is charged to the full 4.2 V, not a lower voltage, | |
| 5 # for traditional mobile phone usage patterns in which the user charges | |
| 6 # the battery fully before going out. | |
| 7 # | |
| 8 # 2) The start threshold is set fairly high on the reasoning that if | |
| 9 # the user connects the charging power source (which is not USB and thus | |
| 10 # not required for computer connection), it means that she actually intends | |
| 11 # to charge the battery, but it is set to 4100 mV instead of "always" | |
| 12 # so that if the battery is really full, an explicit AT@CHG=1 command | |
| 13 # or a future UI equivalent will be needed to force a charging start. | |
| 14 # | |
| 15 # 3) The restart threshold is a reasonable setting so if the phone is left | |
| 16 # plugged into the charger for a long time, the user won't be surprised | |
| 17 # with a battery that has run down significantly after the completion | |
| 18 # of the initial charging cycle. | |
| 19 | |
| 20 start-threshold 4100 # mV | |
| 21 restart-threshold 3900 # mV | |
| 22 | |
| 23 # Constant Voltage charging parameters mostly copied from Pirelli | |
| 24 | |
| 25 ci2cv-threshold 4245 # mV, lowered from Pirelli's 4250 | |
| 26 cv-initial-setpoint 4220 # mV | |
| 27 cv-ctrl-loop-high 4236 # mV | |
| 28 cv-ctrl-loop-low 4170 # mV, bumped up from Pirelli's 4160 | |
| 29 cv-dac-max-incr 8 # DAC units | |
| 30 cv-dac-max-decr 50 # DAC units | |
| 31 cv-ctrl-loop-sample-count 6 # our logic is simpler than Pirelli's | |
| 32 overvoltage 4280 # mV, bumped up from Pirelli's 4270 | |
| 33 | |
| 34 # For the current settings, keep in mind that C1xx phones use a current | |
| 35 # measurement resistor of 0.15R instead of TI's "canonical" value of 0.20R, | |
| 36 # hence the conversion factor between mA and ADC/DAC numbers changes | |
| 37 # accordingly. The CI current setting is based on what Motorola's fw | |
| 38 # has been observed to set, but the end current setting is our own, | |
| 39 # chosen empirically. | |
| 40 | |
| 41 ci-current 280 # DAC units, about 320 mA | |
| 42 end-current 60 # ADC units, about 68 mA | |
| 43 ichg-max-spike 26 # ADC units, about 30 mA | |
| 44 ichg-low-samples-needed 30 # sample count | |
| 45 | |
| 46 # The apppropriate charging time limit and restart delay have yet to be | |
| 47 # determined; for now we give it a super-generous 6 h charging time limit | |
| 48 # and 2 h restart delay. | |
| 49 | |
| 50 charging-time-limit 21600 | |
| 51 restart-delay 7200 | |
| 52 | |
| 53 # Motorola's fw does not seem to use the I2V offset mechanism, | |
| 54 # but we use the same setting as Pirelli. | |
| 55 | |
| 56 i2v-offset 0x18 # register setting |