harmony 鸿蒙Charging Idle State Customization

2023-06-24
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Charging Idle State Customization

Overview

Introduction

By default, OpenHarmony provides the charging idle state feature. It determines whether a device is currently in the idle state according to a thermal level, battery level, charging state, and charging current of the device. A device in this state may execute some background intensive tasks. However, the conditions that determine the charging idle state vary according to product specifications. To address this issue, OpenHarmony provides the charging idle state customization function.

Constraints

The configuration path for battery level customization is subject to the configuration policy. In this development guide, /vendor is used as an example of the configuration path. During actual development, you need to modify the customization path based on the product configuration policy.

How to Develop

Setting Up the Environment

Hardware requirements:

Development board running the standard system, for example, the DAYU200 or Hi3516D V300 open source suite.

Environment requirements:

For details about the requirements on the Linux environment, see Quick Start.

Getting Started with Development

The following uses DAYU200 as an example to illustrate charging idle state customization.

Create the thermal folder in the product directory /vendor/hihope/rk3568.
Create a target folder by referring to the default folder of battery idle state configuration, and install it in //vendor/hihope/rk3568/thermal. The content is as follows:
```
profile
├── BUILD.gn
├── thermal_service_config.xml
```
Write the custom thermal_service_config.xml file by referring to the thermal_service_config.xml file in the default folder of charging idle state configuration. The following table describes the related configuration items.

Table 1 Configuration items for the charging idle state

```shell
<idle name="charging">
    <thermallevel>1</thermallevel>
    <soc>90</soc>
    <charging>1</charging>
    <current>1000</current>
</idle>
```

Write the BUILD.gn file by referring to the BUILD.gn file in the default folder of charging idle state configuration to pack the thermal_service_config.xml file to the /vendor/etc/thermal_config directory. The configuration is as follows:

import("//build/ohos.gni")                      # Reference build/ohos.gni.


ohos_prebuilt_etc("thermal_service_config") {
    source = "thermal_service_config.xml"
    relative_install_dir = "thermal_config"
    install_images = [ chipset_base_dir ]       # Required configuration for installing the thermal_service_config.xml file in the vendor directory.
    part_name = "product_rk3568"                # Set part_name to product_rk3568 for subsequent build. You can change it as required.
}

Add the build target to module_list in ohos.build in the /vendor/hihope/rk3568 directory. For example:

{
    "parts": {
        "product_rk3568": {
            "module_list": [
                "//vendor/hihope/rk3568/default_app_config:default_app_config",
                "//vendor/hihope/rk3568/image_conf:custom_image_conf",
                "//vendor/hihope/rk3568/preinstall-config:preinstall-config",
                "//vendor/hihope/rk3568/resourceschedule:resourceschedule",
                "//vendor/hihope/rk3568/etc:product_etc_conf",
                "//vendor/hihope/rk3568/thermal/profile:thermal_service_config", // Add the configuration for building of thermal_service_config.
            ]
        }
    },
    "subsystem": "product_hihope"
}

In the preceding code, //vendor/hihope/rk3568/thermal/ is the folder path, profile is the folder name, and thermal_service_config is the build target.

Build the customized version by referring to Quick Start.
```
./build.sh --product-name rk3568 --ccache
```
Burn the customized version to the DAYU200 development board.

Debugging and Verification

After startup, run the following command to launch the shell command line:
```
hdc shell
```

Obtain the current charging idle state.

hidumper -s 3303 -a -i

The following is the reference charging idle state after customization:

-------------------------------[ability]-------------------------------


----------------------------------ThermalService---------------------------------
thermallevel: 1
soc: 100
charging: 1
current: 1000