---
# System prepended metadata

title: AR8MXMQ Memory Test

---

AR8MXMQ Memory Test
=
1. Download uuu + image
[ar8mxmq_5.4_yocto_2021-0217.zip](https://engineering.bcmcom.com/CustomerDL/AR8MXMQ/ar8mxmq_5.4_yocto_2021-0217.zip)
2. Restore to eMMC
    * Connect USB Type C cable
    * Move jumper from JP5 to JP4, enter downloader mode
    * Run UUU command with administrator privilege
    ```
    uuu -b emmc_all flash-4gb.bin imx-image-multimedia-imx8mqevk-20210217070005.rootfs.wic.bz2
    ```
    * Move jumper back to JP5
3. Add imx8mq-ar8mxq.dtb to 1st partition
    * Connect serial console (3.3V TTL, TX/RX/GND) to CN21, power on and hit any key to enter u-boot command prompt. 
    ```
    u-boot=> ums 0 mmc 0:1
    ```
    * Use file explorer to copy `imx8mq-ar8mxmq.dtb` to eMMC 1st partition
    * Press `Ctrl-C` to exit `ums` and reboot AR8MXMQ board
    

4. Boot to Yocto and start test with Wayland Terminal
    * Run 500M memtester x5
    ```=shell
    nohup memtester 500M &
    ```
    * Run 3D tutorial x1
    ```=shell
    cd /opt/viv_samples/vdk
    ./tutorial3_es20
    ```
    * Open one terminal and check system load
    ```
    top
    ```
    * Open another terminal and check CPU temperature (update every 2 seconds)
    ```
    watch cat /sys/devices/virtual/thermal/thermal_zone0/temp
    ```