Loader upgrade mode

For the introduction of boot mode, please refer to the chapter “Introduction to updating firmware”

Introduction

In Loader mode, the bootloader will enter the upgrade state, waiting for the host command for firmware upgrade and so on. To enter Loader mode, the bootloader must detect a RECOVERY key press at startup and the USB is connected.

Here’s how to put your device into upgrade mode:

One way is to disconnect the Type-C data cable

  • Press and hold the RECOVERY button(near by the phone jack) on the device and hold it.

  • Plug in the power(Type-C data cable)

  • After about two seconds, release the RECOVERY key.

Another way is to connect the Type-C data cable

  • The Type-C data cable connects the device and the host.

  • Press and hold the RECOVERY button on the device and hold it.

  • After about two seconds, release the RECOVERY key.

upgrade firmware

Developers can choose different firmware upgrade tools according to their different PC operating systems.

  • Windows environment

If developers use Windows host for development, they can use RKDevTool to upgrade the tool. For details, please refer to “Using RKDevTool to upgrade firmware”.

  • Linux environment

If developers use Linux host for development, they can use upgrade_tool to upgrade the tool. For details, please refer to “Using upgrade_tool to upgrade firmware”.