Upgrade the firmware via USB cable

Introduction

This article describes how to upgrade the firmware file on the host to the flash memory of the development board through the Type-C data cable. When upgrading, you need to choose the appropriate upgrade mode according to the host operating system and firmware type.

Preparatory Tools

AIO-3576C development board
Firmware
host computer
Type-C data cable

Prepare Firmware

The firmware can be obtained by compiling the SDK, or you can download the public firmware (unified firmware) from the Resource download. There are two types of firmware files:

A single unified firmware

The unified firmware is a single file packaged and merged by all files such as the partition table, bootloader, uboot, kernel, system and so on. The firmware officially released by Firefly adopts a unified firmware format. Upgrading the unified firmware will update the data and partition table of all partitions on the motherboard, and erase all data on the motherboard.
Multiple partition images

That is, files with independent functions, such as partition table, bootloader, and kernel, are generated during the development phase. The independent partition image can only update the specified partition, while keeping other partition data from being destroyed, it will be very convenient to debug during the development process.

Through the unified firmware unpacking / packing tool, the unified firmware can be unpacked into multiple partition images, or multiple partition images can be merged into a unified firmware.

Install the Upgrade Tool

Windows Operating System

Install RK USB driver

Download Release_DriverAssistant.zip, extract, and then run the DriverInstall.exe inside . In order for all devices to use the updated driver, first select Driver uninstall(驱动卸载) and then select Driver install(驱动安装).

Run AndroidTool's RKDevTool.exe

In order to avoid the burning problem caused by the Androidtool version, it is recommended to use the tool packaged inside the public firmware package for burning.

You can also download AndroidTool separately, unzip it, and run RKDevTool.exe in the RKDevTool_Release_v2.xx directory (note that if you are running Windows 7/8, you need to right-click and select Run as administrator), as shown below:

Linux Operating System

There is no need to install device driver under Linux.

Linux_Upgrade_Tool

Download Linux_Upgrade_Tool, And install it into the system as follows for easy invocation:

unzip Linux_Upgrade_Tool_xxxx.zip
cd Linux_UpgradeTool_xxxx
sudo mv upgrade_tool /usr/local/bin
sudo chown root:root /usr/local/bin/upgrade_tool
sudo chmod a+x /usr/local/bin/upgrade_tool

Linux_adb_fastboot

Download Linux_adb_fastboot, And install it into the system as follows for easy invocation:

sudo mv adb /usr/local/bin
sudo chown root:root /usr/local/bin/adb
sudo chmod a+x /usr/local/bin/adb

sudo mv fastboot /usr/local/bin
sudo chown root:root /usr/local/bin/fastboot
sudo chmod a+x /usr/local/bin/fastboot

Enter Upgrade mode

Usually we upgrade firmware in two modes, namely Loader mode and MaskRom mode. Before we can write the firmware, we need to connect the device and put the board into upgradable mode.

Loader mode

Hardware way into Loader mode

Connect the device and press the RECOVERY button to enter the Loader mode. The steps are as follows:

The EC-A3576C enclosure has no reserved Recovery button; please enter Loader mode by software.

Software way into Loader mode

Type-C data cable is connected, use the command in the serial debugging terminal or adb shell:

reboot loader

Check the Loader mode

How to determine whether the board is in Loader mode, we can check through the tool

Windows Operating System

The AndroidTool displays the prompt Found One LOADER Device at the bottom

if the “Enter Loader mode” operation is performed, and the LOADER prompted by the upgrade tool is not displayed, check whether the Windows host computer you to discover new hardware and configure the driver. Open the Device manager and a new device Rockusb Device will appear, as shown below. If not, you can go back to the previous step to reinstall the driver.

Linux Operating System

After running upgrade_tool, you can see a Loader prompt in the connected device:

firefly@T-chip:~/severdir/down_firmware$ sudo upgrade_tool
List of rockusb connected
DevNo=1 Vid=0x2207,Pid=0x330c,LocationID=106    Loader
Found 1 rockusb,Select input DevNo,Rescan press <R>,Quit press <Q>:q

MaskRom mode

To enter MaskRom mode, MaskRom pattern is the last line of defense equipment burn out. Forced entry MaskRom involved hardware operation, have certain risk, so only in the equipment into the Loader mode, can try MaskRom mode.

Please read carefully and operate carefully!

The operation steps are as follows:

Disconnect the power, press and hold Maskrom button, plug in the power, release button after few seconds.

At this point, the device should go into MaskRom mode.

Disconnect the device from the power supply
Press and hold the MaskRom hole on EC-A3576C with a pin tool
The device is plugged into the power supply and powered on

The MaskRom hole position is shown in the figure below:

Switch to the Upgrade Firmware page.
Press the Firmware button to open the firmware file to be upgraded. The upgrade tool displays detailed firmware information.
Press the Upgrade button to start the upgrade.
If the upgrade fails, you can try to erase the Flash by pressing the EraseFlash button first, and then upgrade.

Linux Operating System

Upgrade unified firmware - update.img

sudo upgrade_tool uf update.img

If the upgrade fails, try erasing before upgrading.

# erase flash : Using the ef parameter requires the loader file or the corresponding update.img to be specified.
# update.img :The ubuntu firmware you need to upgrade.
sudo upgrade_tool ef update.img
# upgrade again
sudo upgrade_tool uf update.img

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