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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:

  • Disconnect the power adapter first:
  • Dual male usb data cable connects one end to the host and the other end to the development board. _images/otg_interface.png
  • Press the RECOVERY button on the device and hold. _images/recovery_key.png
  • Connect to the power supply.
  • About two seconds later, release the RECOVERY button.

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”.