修改电源配置

电源

修改电源配置

2019-07-13 23:23发布生成海报

站内文章 / 电源技术

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使用注册表，修改电源配置

可以在cmd.exd命令行窗口执行powercfg.exe
电源配置所在注册表位置：HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlPowerUserPowerSchemes 最开始的时候，是想通过直接修改注册表去处理，可是发现各种没权限，在inno setup中写注册表不行，用api也不行，最后找到了这种方法。
powerfcg guid 参考地址：https://blogs.technet.microsoft.com/richardsmith/2007/11/29/powercfg-useful-if-you-know-the-guids/ 1.获取当前使用的电源计划，如：平衡，高性能，节能等。
对应的guid:
平衡：381b4222-f694-41f0-9685-ff5bb260df2e
高性能：8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
节能：a1841308-3541-4fab-bc81-f71556f20b4a

    //get current powercfg guid
    QString currPowerGuid;
    QProcess powercfg;
    powercfg.start("powercfg -getactivescheme");
    //if(powercfg.waitForReadyRead())
    while(powercfg.waitForFinished())
    {
        QString result = QString::fromLocal8Bit(powercfg.readAll());
        QStringList resultList = result.split(" ");
        //eg: 电源方案 GUID: 381b4222-f694-41f0-9685-ff5bb260df2e  (平衡)
        if(resultList.count() >= 4)
        {
            currPowerGuid = resultList[2];
        }
        else
        {
            g_log->logFunc2(LOG_ERROR, "get current powercfg guid error.");
            return;
        }
    }
    powercfg.close();

2.设置唤醒时不需要密码

    QString wakeupParentGuid = "fea3413e-7e05-4911-9a71-700331f1c294";
    QString wakeupPasswordGuid = "0e796bdb-100d-47d6-a2d5-f7d2daa51f51";
    //enable wake up password, not use wake up password
    QString cmdPasswordStr = "powercfg -setacvalueindex " + currPowerGuid + " "
            + wakeupParentGuid + " " + wakeupPasswordGuid + " " + QString::number(0);
    powercfg.start(cmdPasswordStr);
    while(powercfg.waitForFinished())
    {
        g_log->logFunc2(LOG_INFO, "disable wakeup password success");
    }
    powercfg.close();

3.设置启用定时器唤醒功能

    QString sleepGuid = "238c9fa8-0aad-41ed-83f4-97be242c8f20";
    QString enableTimerWakeGuid = "bd3b718a-0680-4d9d-8ab2-e1d2b4ac806d";
    //enable timer wake up, use wake up timer
    QString cmdStr = "powercfg -setacvalueindex " + currPowerGuid + " " + sleepGuid
            + " " + enableTimerWakeGuid + " " + QString::number(enable);
    powercfg.start(cmdStr);
    while(powercfg.waitForFinished())
    {
        g_log->logFunc2(LOG_INFO, "enable wakeup timer success");
    }
    powercfg.close();