Infinity R1

A brave effort to make a flashable linux image for the InfinityR1 (8G1/512M) AI Soundbox

⚠️ WARNING ⚠️

 Experimental stuff going on here, proceed with caution! 

InfinityR1 8G/512M

• CPU : Rockchip RK3229 quad core ARM Cortex A7 processor @1.5 GHz
• GPU : ARM Mali-400MP
• Memory : 512M DDR3
• Storage : 8GB samsung emmc flash,KLM8G1GEME-B041 8GB 16nm，EMMC5.1 #- Video Output : HDMI 2.0 up to 4K2K @60 fps, and 3.5mm AV output (composite)
• Audio Input ：
  • 4x MIC
  • 3x ES7243 ADC I2S/ADC
• Audio Output : DAC stereo|Mono ADC AK7755 to AMP TI TPA3118 class D #HDMI, AV, and coaxial S/PDIF
• Connectivity : wifi and bluetooth,CYPRESS CYW43455/802.11n/ac,BT4.2 #100Mbps Ethernet, 802.11 b/g/n WiFi
• USB : 1x USB 2.0 host ports|OTG
• Interfaces : 1x USB #HDMI port, RJ45 port, SPDIF port, 4x USB Host, SD Card Slot, AV Out DC jack.
• Power Supply : 5V/2A

TODO

• get UART output through USB OTG
• Build own U-Boot / Kernel / rootfs
• Video Output while booting
• Enable UART routing to USB port(?)
• Enable netbooting

How-to UART

What you need

• Setup a micro usb connector or wired directly.
• an USB-TTL adaptor such as CH340.

Wiring

the Check point on board and connect way as below.

USB-TTL to UART wiring

USB-TTL     UART
  OTG/ID -> TP12(not connected)
  RXD   ->   TP13/DP 
  TXD   ->   TP14/DM
  GND   ->   GND

Connect USB-TTL and open terminal emulator of choice

Baudraute : 1.5M(1500000)
Data bits : 8M
Stop bits : 1

Important: need connect r211 with the GND before plugin the power supply to soundbox.

How-to Build U-Boot

Follow this guide

or..

One script to handle it all

How to flash new u-boot.img to board

How-To boot the new u-boot.img from SD

How to..

How-to recover

• Start AndroidTool/RKBatchTool
• Shorten pins 8 & 9 on the nand chip (see image and make sure you do this right!!!)
• Power up using the OTG port

You should now see 'Found One MASKROM Device'

• Click the 'Upgrade Firmware' tab, then 'EraseFlash' (i had to select firmware before erasing)
• If successful, hit the 'Upgrade' button

All good?

Repair corrupted SDcard..

Red LED after tampering with the files on SDcard?

sudo fdisk -l
sudo fsck -a /dev/sd[partition]