Android Startup Charging Icon and Charging Animation Effect

  • 2021-11-14 07:06:44
  • OfStack

First, the driver needs to obtain two power supply

kernel\msm-3.18\drivers\usb\phy\phy-msm-usb.c


motg->usb_psy.name = "usb";
motg->usb_psy.type = POWER_SUPPLY_TYPE_USB;
motg->usb_psy.supplied_to = otg_pm_power_supplied_to;
motg->usb_psy.num_supplicants = ARRAY_SIZE(otg_pm_power_supplied_to);
motg->usb_psy.properties = otg_pm_power_props_usb;
motg->usb_psy.num_properties = ARRAY_SIZE(otg_pm_power_props_usb);
motg->usb_psy.get_property = otg_power_get_property_usb;
motg->usb_psy.set_property = otg_power_set_property_usb;
motg->usb_psy.property_is_writeable
  = otg_power_property_is_writeable_usb;

if (!msm_otg_register_power_supply(pdev, motg))
  psy = &motg->usb_psy;

kernel\msm-3.18\drivers\power\bq2570x\bq2570x_charger.c


 usb_psy = power_supply_get_by_name("usb");

static int bq2570x_psy_register(struct bq2570x *bq)
{
  int ret;

  bq->batt_psy.name = "dc_o2";
  bq->batt_psy.type = POWER_SUPPLY_TYPE_BATTERY;
  bq->batt_psy.properties = bq2570x_charger_props;
  bq->batt_psy.num_properties = ARRAY_SIZE(bq2570x_charger_props);
  bq->batt_psy.get_property = bq2570x_charger_get_property;
  bq->batt_psy.set_property = bq2570x_charger_set_property;
  bq->batt_psy.external_power_changed = bq2570x_external_power_changed;
  bq->batt_psy.property_is_writeable = bq2570x_charger_is_writeable;

  ret = power_supply_register(bq->dev, &bq->batt_psy);
  if (ret < 0) {
    pr_err("failed to register batt_psy:%d\n", ret);
    return ret;
  }

  return 0;
}

Charging lightning icon and charging animation startup logic

Lightning icon startup logic: power supply of POWER_SUPPLY_TYPE_USB reported USB type (CDP, DCP, USB)


power_supply_set_supply_type(bq->usb_psy, POWER_SUPPLY_TYPE_USB);
ret = power_supply_set_online(bq->usb_psy, true);
power_supply_changed(bq->usb_psy);

Startup logic of charging animation: power supply of POWER_SUPPLY_TYPE_BATTERY reports charging status


(CHARGE_STATE_NOT_CHARGING , CHARGE_STATE_FASTCHARGE)
bq->charge_state = CHARGE_STATE_FASTCHARGE;
power_supply_changed(&bq->batt_psy);

Using dumpsys to analyze the current battery status


V2_PRO:/ # dumpsys battery
Current Battery Service state:
 AC powered: false
 USB powered: true
 Wireless powered: false
 Max charging current: 0
 Max charging voltage: 0
 Charge counter: 0
 status: 2
 health: 2
 present: true
 level: 46
 scale: 100
 voltage: 7
 temperature: 270
 technology: Li-ion

The above mainly focuses on two fields:

USB powered : true

Then the lightning icon should appear

status: 2

Then the charging animation should start

At the same time, we can also start the charging icon and charging animation through shell command

dumpsys battery set usb 1

The lightning icon should appear

dumpsys battery set status 2

Charging animation should start

dumpsys battery set usb 0

Lightning icon disappears

dumpsys battery set status 4

Charging animation disappears

Summarize


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