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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”.