Android STR研究之四

dzy_mails2023-11-03 12:12

前言：

在前三篇中初步介绍了开机流程和STR流程，这里讲唤醒

Android STR研究之一-CSDN博客

Android STR研究之二-CSDN博客

Android STR研究之三-CSDN博客

唤醒

如上文所述，当唤醒的时候代码会继续往下执行

    private void doHandleDeepSleep(boolean simulatedMode) {
        // keep holding partial wakelock to prevent entering sleep before enterDeepSleep call
        // enterDeepSleep should force sleep entry even if wake lock is kept.
        mSystemInterface.switchToPartialWakeLock();
        mHandler.cancelProcessingComplete();
        synchronized (mLock) {
            mLastSleepEntryTime = SystemClock.elapsedRealtime();
        }
        int nextListenerState;
        if (simulatedMode) {
            simulateSleepByWaiting();
            nextListenerState = CarPowerStateListener.SHUTDOWN_CANCELLED;
        } else {
            boolean sleepSucceeded = suspendWithRetries();
            if (!sleepSucceeded) {
                // Suspend failed and we shut down instead.
                // We either won't get here at all or we will power off very soon.
                return;
            }
            // We suspended and have now resumed
            nextListenerState = CarPowerStateListener.SUSPEND_EXIT;
        }
        synchronized (mLock) {
            mIsResuming = true;
            // Any wakeup time from before is no longer valid.
            mNextWakeupSec = 0;
        }
        Slog.i(TAG, "Resuming after suspending");
        //恢复屏幕亮度
        mSystemInterface.refreshDisplayBrightness();
        //发送状态给vhal
        onApPowerStateChange(CpmsState.WAIT_FOR_VHAL, nextListenerState);
    }

此时给vhal发送的信号状态是（信号：VehicleProperty.AP_POWER_STATE_REPORT，信号值CarPowerStateListener.SUSPEND_EXIT）

Vhal会上报ON状态，正常使用