---

void PowerModeSwitchTask(void *pvParameters)
{
    lptmr_config_t lptmrConfig;

    lpm_power_mode_t targetPowerMode;
    uint32_t freq = 0U;
    uint8_t ch;
    int32_t status = SCMI_ERR_SUCCESS;

    /* Setup LPTMR. */
    LPTMR_GetDefaultConfig(&lptmrConfig);
    lptmrConfig.prescalerClockSource = kLPTMR_PrescalerClock_2;  /* Use RTC 32KHz as clock source. */
    lptmrConfig.bypassPrescaler      = true;
    lptmrConfig.value                = kLPTMR_Prescale_Glitch_0; /* Divide clock source by 2. */
    LPTMR_Init(LPTMR2, &lptmrConfig);
    NVIC_SetPriority(LPTMR2_IRQn, APP_LPTMR2_IRQ_PRIO);

    EnableIRQ(LPTMR2_IRQn);

    /* Setup LPUART. */
    NVIC_SetPriority(LPUART3_IRQn, APP_LPUART3_IRQ_PRIO);

    EnableIRQ(LPUART3_IRQn);

    for (;;)
    {
        freq = HAL_ClockGetIpFreq(hal_clock_m7);
        PRINTF("\r\n####################  Power Mode Switch Task ####################\n\r\n");
        PRINTF("    Build Time: %s--%s \r\n", __DATE__, __TIME__);
        PRINTF("    Core Clock: %dHz \r\n", freq);
        PRINTF("\r\nSelect the desired operation \n\r\n");
        PRINTF("Press  %c to enter: Normal RUN mode\r\n", kAPP_PowerModeRun);
        PRINTF("Press  %c to enter: WAIT mode\r\n", kAPP_PowerModeWait);
        PRINTF("Press  %c to enter: STOP mode\r\n", kAPP_PowerModeStop);
        PRINTF("Press  %c to enter: SUSPEND mode\r\n", kAPP_PowerModeSuspend);
        PRINTF("Press  P to suspend A55 core\r\n");
        PRINTF("Press  W to wakeup A55 core\r\n");
        PRINTF("Press  S to scan LPI2C3\r\n");
        PRINTF("Press  E to camera ON\r\n");
        PRINTF("Press  F to camera OFF\r\n");
        PRINTF("\r\nWaiting for power mode select..\r\n\r\n");

        /* Wait for user response */
        do
        {
            ch = GETCHAR();
        } while ((ch == '\r') || (ch == '\n'));

        if ((ch >= 'a') && (ch <= 'z'))
        {
            ch -= 'a' - 'A';
        }
        if ('S' == ch)
        {
            lpi2c_scan_bus(3);
            continue;
        }
        else if('E' == ch)
        {
            APP_SRTM_CameraSendCommandSync(SRTM_SERVICE_CAMERA_ID, 0, SRTM_CMD_CAMERA_ON, 50);
            continue;
        }
        else if('F' == ch)
        {
            APP_SRTM_CameraSendCommandSync(SRTM_SERVICE_CAMERA_ID, 0, SRTM_CMD_CAMERA_OFF, 50);
            continue;
        }

        int modeIndex = ch - 'A';

        if ((ch != 'P') && (ch != 'W') && ((modeIndex < 0) || (modeIndex >= LPM_PowerModeCount)))
        {
            PRINTF("Invalid power mode input: %c\r\n", ch);
            continue;
        }
        targetPowerMode = (lpm_power_mode_t)modeIndex;

        if (targetPowerMode < LPM_PowerModeCount)
        {
            if (targetPowerMode == s_curMode)
            {
                /* Same mode, skip it */
                continue;
            }
            if (targetPowerMode == LPM_PowerModeSuspend)
            {
                PRINTF("Application get in Suspend mode\r\n");
            }
            if (!LPM_SetPowerMode(targetPowerMode))
            {
                PRINTF("Some task doesn't allow to enter mode %s\r\n", s_modeNames[targetPowerMode]);
            }
            else /* Idle task will handle the low power state. */
            {
                APP_GetWakeupConfig();
                APP_SetWakeupConfig(targetPowerMode);
                PRINTF("Target powermode get in %s\r\n", s_modeNames[targetPowerMode]);
                xSemaphoreTake(s_wakeupSig, portMAX_DELAY);
            }
        }
        else if ('P' == ch)
        {
            /* skip this command if A55 already in suspend mode. */
            uint32_t runMode, velow, vehigh;
            uint32_t sleepMode = CPU_SLEEP_MODE_RUN;
            int32_t status = SCMI_ERR_SUCCESS;

            status = SCMI_CpuInfoGet(SCMI_A2P, AP_DOMAIN_LD, &runMode, &sleepMode, &velow, &vehigh);
            if (status != SCMI_ERR_SUCCESS)
            {
                PRINTF("Get AP info fail\r\n");
            }

            if (sleepMode == CPU_SLEEP_MODE_SUSPEND)
            {
                PRINTF("AP already in suspend mode, skip this command\r\n");
                continue;
            }
            else
            {
                status = SCMI_LmmSuspend(SCMI_A2P, AP_DOMAIN_LD);
                if (status != SCMI_ERR_SUCCESS)
                {
                    PRINTF("SCMI_LmmSuspend A55 fail\r\n");
                }
            }
        }
        else if ('W' == ch)
        {
            status = SCMI_LmmWake(SCMI_A2P, AP_DOMAIN_LD);
            if (status != SCMI_ERR_SUCCESS)
            {
                PRINTF("SCMI_LmmWake A55 fail\r\n");
            }
        }
        else
        {
            PRINTF("Invalid command %c[0x%x]\r\n", ch, ch);
        }

        /* update Mode state */
        s_curMode = LPM_PowerModeRun;      
        PRINTF("\r\nNext loop\r\n");
    }
}