1: env:

	1.1: prepare source code ,eg: ~/rk3566/
	1.2: cp  rkbin file(for build image done)---https://github.com/rockchip-linux/rkbin
		mv rkbin  ~/rk3566/
	1.3: SDDiskTool_v1.69.zip	 

2: build:
	cd ~/rk3566
	./make.sh rk3566
	./make.sh trust
	cp trust.img rk3566_tool/Image/
	cd  ~/rk3566/rk3566_tool
	kernel build:make ARCH=arm64 rk3566.img -j12--------generate resource.img
	cp resource.img ~/rk3566/rk3566_tool/Image
	sudo ./rk3566-mkupdate.sh
	
	so,we get the update.image -->>>>(at rk3566_tool/update.img).
	
3: DownLoad image (prepare  get u-boot with GPT info)

	new ,we need to downLoad update.img  by tool the "SDDiskTool_v1.69.zip" (need to run on windows system).

	SD_Firmware_Tool.exe  
    	"Fireware" of rk3566_tool/update.img 
		choose  "Create"  to download
	
4: 	get sub image (get u-boot with GPT and  loader，then  build  all to batocera).
	
	sudo dd if=/dev/sdb of=uboot.img count=32768 bs=512---------------Obtain
	sudo dd if=uboot.img of=/dev/sdb count=32768 bs=512---------------burn
	
	the u-boot.img is  we need.

5: so ,we get the image uboot.img (with three  part , GPT+loader+u-boot.img),the image can  boot to kernel(pex,filesystem);
	now  GPT  only contain  loader+uboot，if wonder add new partition ,need to modify  GPT。