FAQS

Switch recording input source

ROC-RK3328-PC The default recording input source is an onboard microphone Builtin Mic,You can manually switch to phone recording Wired Headset:

1. Find sound in settgins APK and click it;
2. Click advanced and the audio input option will appear;
3. Select wired header

Open Root permissions

There are many powerful functions of the Android system that require root permissions. Developers often encounter permissions problems when using them. How to enable the root permissions of the system on the Firefly platform? Firefly has added the function of starting root privileges in the system. The specific steps are as follows:

1. Find About device in Settgins apk and click into it;
2. After clicking on Build number 5 times, it will prompt (you are now a developer);
3. Then return to the previous level and click the option Developer options, and click ROOT access in the options to open the root authority function.

What should I do if the boot is abnormal and restarts cyclically?

It may be that the power supply current is not enough. Please use a power supply with a voltage of 12V and a current of 2.5A~3A.

What is the default username and password for Ubuntu?

• Username: firefly
• Password: firefly
• Switch super user sudo -s

Write number tool to write SN, MAC address

Note: If the eMMC erase operation is performed on the development board, the previously written data will also be cleared.

Windows way

• Install RKDevInfoWriteTool
  • Download link
• Select "RPMB" in Settings of RKDevInfoWriteTool
• Configure "SN", "WIFI MAC", "LAN MAC", "BT MAC", etc. in the Settings of RKDevInfoWriteTool as needed
• The development board enters loader mode
• RKDevInfoWriteTool performs write or read operations

For specific operations, please refer to the PDF document "RKDevInfoWriteTool User Guide" under the RKDevInfoWriteTool installation directory.

Linux way

How to write the number of the development board itself

• Buildroot enable BR2_PACKAGE_VENDOR_STORAGE

• Read and write operations through the vendor_storage command

  • Download link
  • SN

  vendor_storage -w VENDOR_SN_ID -t string -i cad895bedb8ee15f
  vendor_storage -r VENDOR_SN_ID -t hex -i /dev/null

  • LAN MAC

  vendor_storage -w VENDOR_LAN_MAC_ID -t string -i AABBCCDDEEFF
  vendor_storage -r VENDOR_LAN_MAC_ID -t hex -i /dev/null

  Others can be operated according to the prompt of vendor_storage -h.

For how to read the application, please refer to the vendor_storage_read function in buildroot/package/rockchip/vendor_storage/vendor_storage.c.

On Ubuntu system, if there is no sound after plugging in headphones, what should I do?

Menu -> Multimedia -> PulseAudio Volume Control -> Configuration -> Select the sound card that is working and turn off the other sound card.

How to make the system crawl LOG under Android?

Settings (settings) -> About phone (about phone) -> Click 5 times Build number (version number) -> Developer options (Developer options) -> Enable logging to save Save). After the function is turned on, the folder .LOGSAVE will be generated under the root directory of the system storage, which includes the system logcat and kernel kmsg.