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Fastboot is a protocol that can be used to re-flash partitions on your device (update the flash file system in your devices). It is this small tool that comes with the Android SDK (Software Developer Kit), which is an alternative to the Recovery Mode for doing installations and updates. It first comes with Android. Google have submit the fastboot code to mainline U-boot. So we can use this protocol to flash partition on your device. There are three way to enter fastboot mode

Fastboot command

Rockchip use 0x2207 as its USB vendor ID. This VID is not in Google's original fastboot code. So every fastboot command have to use "-i" parameter to specify vid to fastboot.
To list all the Rockchip devices attached to your USB port in fastboot mode.

<code>$ sudo fastboot -i 0x2207 devices
0123456789AB fastboot</code>

To flash loader

<code>$ sudo fastboot -i 0x2207 flash loader "path to your loader"</code>

To flash Android boot image

<code>$ sudo fastboot -i 0x2207 flash boot_a "path to your boot image"
0123456789AB fastboot</code>

To flash Android system image

<code>$ sudo fastboot -i 0x2207 flash system_a "path to your system image"
0123456789AB fastboot</code>

To Get Version:

fastboot getvar version

To Get Version:

fastboot getvar version-bootloader

To Get Unlocked:

fastboot getvar unlocked 

To Get Locked:

fastboot getvar secure

To Get Product Information:

fastboot getvar product

To Get Serialno:

fastboot getvar serialno

To Get Partition Type:

fastboot getvar partition-type:<partition_name>

To Get Partition Size:

fastboot getvar partition-size:<partition_name>

To Get Partition Offset:

fastboot getvar partition-offset:<partition_name>



Download Image

To Download Image

fastboot flash <partition_name> <filename>

(For example:fastboot flash system system.img

When download the parameter or loader,需指定分区名为”parameter”/”loader”)

 To Update Firmware

fastboot update <filename> 

(The firmware package was generated from  android source code which is “make updatepackage”)

(升级包通过在android源码中make updatepackage生成)




fastboot oem recovery 


fastboot oem recovery:wipe_data


fastboot reboot


fastboot reboot-bootloader
fastboot continue 


Lock and Unlock the Device

fastboot oem unlock                                             解锁

fastboot oem unlock_accept                                        确认解锁

(需要在fastboot oem unlock命令后,5秒内输入)

fastboot oem lock                                                 锁住设备

Special Command

fastboot boot <kernel> [ <ramdisk> ]                             临时从指定固件启动


fastboot oem log                                                  获取串口log信息

fastboot oem ucmd <UBOOT cmds>                                 运行UBOOT命令 </pre>

Fastboot Unlock



1、执行fastboot oem unlock

2、5秒内继续执行fastboot oem unlock_accept


4、再次进入fastboot,则fastboot getvar unlocked应该返回"yes"(设备已解锁)


如果设备进入fastboot状态后,fastboot命令提示未发现设备,则需要在命令中加入-i参数指定设备vid,例如fastboot -i 0x2207 getvar unlocked