Introduction
The Fast Device Firmware Update (Fast DFU) enables downloading the target firmware to a target device and enables the device to automatically check and update the firmware through Bluetooth transmission.
Compared with the over-the-air (OTA) technology which also enables downloading and updating the target firmware through Bluetooth transmission, GR551x Fast DFU greatly shortens the time for firmware update by providing Fast OTA Service which enables control, interaction, and various features of Fast DFU, as well as optimizing data read and write.
As a solution for wireless firmware update, Fast DFU features faster update process and better user experience. This document elaborates on principles and applications of Fast DFU for GR551x SoCs. Before you get started, it is recommended to refer to the following documents.
| Name | Description |
|---|---|
GR551x Developer Guide |
Introduces the software/hardware and quick start guide of GR551x SoCs. |
Bluetooth Core Spec v5.1 |
Offers official Bluetooth standards and core specification (v5.1) from Bluetooth SIG. Available at https://www.bluetooth.com/specifications/bluetooth-core-specification/. |
J-Link/J-Trace User Guide |
Provides J-Link operational instructions. Available at www.segger.com/downloads/jlink/UM08001_JLink.pdf. |
Keil User Guide |
Offers detailed Keil operational instructions. Available at www.keil.com/support/man/docs/uv4/. |
GR551x Bluetooth Low Energy Stack User Guide |
Introduces the BLE Protocol Stack supported by GR551x SoCs. |
