harmony 鸿蒙Wakeup Source Customization

2023-06-24
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Wakeup Source Customization

Overview

Introduction

OpenHarmony supports multiple wakeup sources, such as the power button, keyboard, and mouse, and provides custom modes for turning on and off these wakeup sources. After a device enters the sleep state, you can turn on the screen and wake up the device by pressing the power button, keyboard, or mouse. However, different products may support different peripherals, for example, stylus or folio keyboard. To address this issue, OpenHarmony provides the wakeup source customization function, allowing you to customize wakeup sources depending on your hardware specifications.

Constraints

The configuration paths for battery level customization are subject to the configuration policy. 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 wakeup source customization.

Create the power_manager folder in the product directory /vendor/hihope/rk3568.
Create a target folder by referring to the default folder of wakeup source configuration, and install it in /vendor/hihope/rk3568/power_manager. The content is as follows:
```
profile
├── BUILD.gn
├── power_wakeup.json
```

Write the custom power_wakeup.json file that contains the custom wakeup sources. The following is an example of wakeup source configuration:

{
    "powerkey": {
        "enable": true
    },
    "keyborad": {
        "enable": true
    },
    "mouse": {
        "enable": true
    },
    "touchscreen": {
        "enable": true,
        "click": 2
    },
    "touchpad": {
        "enable": true
    },
    "pen": {
        "enable": true
    },
    "lid": {
        "enable": true
    },
    "switch": {
        "enable": true
    }
}

Table 1 Description of wakeup sources

**Table 2** Description of the wakeup source configuration

Write the BUILD.gn file by referring to the BUILD.gn file in the default folder of wakeup source configuration to pack the power_wakeup.json file to the /vendor/etc/power_config directory. The configuration is as follows:

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


ohos_prebuilt_etc("wakeup_config") {
    source = "power_wakeup.json"
    relative_install_dir = "power_config"
    install_images = [ chipset_base_dir ] # Required configuration for installing the battery_config.json file in the vendor directory.
    part_name = "product_rk3568"          # Set part_name to product_rk3568 for subsequent build.
}

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/power_manager/profile:wakeup_config" // Add the configuration for building of wakeup_config.
            ]
        }
    },
    "subsystem": "product_hihope"
}

In the preceding code, //vendor/hihope/rk3568/power_manager/ is the folder path, profile is the folder name, and wakeup_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

Customize wakeup sources in the power_wakeup.json file.

{
    "powerkey": {
        "enable": true
    },
    "keyborad": {
        "enable": true
    },
    "mouse": {
        "enable": true
    },
    "touchscreen": {
        "enable": false,
        "click": 2
    },
    "touchpad": {
        "enable": false
    },
    "pen": {
        "enable": false
    },
    "lid": {
        "enable": false
    },
    "switch": {
        "enable": false
    }
}

After the device is powered on, press the power button to switch the device to the sleep mode. Then, press the power button again.

The device screen is turned on and the device is woken up.
Press the power button to switch the device to the sleep mode, and then press the keyboard.

The device screen is turned on and the device is woken up.
Press the power button to switch the device to the sleep mode, and then move the mouse.

The device screen is turned on and the device is woken up.