albert2lyu/rg99

RG99

Introduction

Thanks Paul Cercueil and Opendingux development team. OpenDingux system is getting better and better. Based on OpenDingux resource, now, Linux OS can run on RG99 handheld. If you would like to port some emulators or games into this device, you can follow the build instruction below, thanks !

Component	Description
CPU	Ingenic JZ4725B 360MHz
RAM	32MB
Storage	256MB
Screen	2.8" 320x480
Slot	MicroSD
Gamepad	DPad, 4 Buttons, M1, M2, Start, Select, L, R
USB	Client
Battery	3.7V 1800mA
Dimension	119mm x 82mm x 25mm
Weight	325g
Others	Vibrator

How to build Linux OS for RG99

prepare environment

• Debian 9 (x64)
• all of source code and prebuilt binary can be found from release page

configure toolchain

• extract toolchain_rg99.7z into /opt/rg99
• command:
  • export PATH=$PATH:/opt/rg99/usr/bin

build buildroot

• download buildroot.tar.gz from release page
• command:
  • $ make rg99_defconfig
  • $ make

build kernel

• download kernel_v1.0.tar.gz from release page
• command:
  • $ ARCH=mips CROSS_COMPILE=mipsel-linux- make rg99_defconfig
  • $ ARCH=mips CROSS_COMPILE=mipsel-linux- make uzImage.bin dtbs -j8
• for kernel (enable UART), copy "arch/mips/boot/dts/ingenic/rg99_dbg.dts" to "arch/mips/boot/dts/ingenic/rg99.dts"
• for kernel (disable UART), copy "arch/mips/boot/dts/ingenic/rg99_rel.dts" to "arch/mips/boot/dts/ingenic/rg99.dts"

flash bootloader

• download flasher.tar.gz from release page
• put RG99 into boot mode (Press START and then power up)
• plug USB into PC
• command:
  • $ sudo flash.sh

flash system

• download v1.0_sdcard.img.7z from release page
• prepare 4GB MicroSD
• flash sdcard.img into MicroSD

UART debug

• solder UART
• 
• download v1.0_boot_dbg.tar.gz from release page
• overwrite uzImage.bin and rg99.dtb in boot partition (MicroSD)
• open minicom or putty with baudrate 57600bps
• use root login
• now, you can start to debug your program (gdb and perf tools are preinstalled in rootfs already)
• if you want to disable gmenu2x from boot, edit "etc/init.d/S01syslogd" and then comment out "/etc/main &"
• all of post tasks are put in "/usr/sbin/post_init" file (include audio init and USB storage init)

https://steward-fu.github.io/website/index.htm