Luckfox Pico boards

U-Boot for the Luckfox Pico series of RV1103/RV1106 boards. Only the Pico Mini B (RV1103, 64MB DDR2, 128MB SPI NAND) is supported so far.

Quick Start

Get the DDR initialization binary
Build U-Boot
Boot the board over USB, or flash U-Boot into the SPI NAND

Get the DDR initialization binary

$ git clone https://github.com/rockchip-linux/rkbin.git

The DDR initialization binary is at rkbin/bin/rv11/rv1106_ddr_924MHz_v1.15.bin and covers both the RV1103 and the RV1106.

Build U-Boot

$ export CROSS_COMPILE=arm-linux-gnueabihf-
$ export ROCKCHIP_TPL=<path-to-rkbin>/bin/rv11/rv1106_ddr_924MHz_v1.15.bin
$ make luckfox-pico-mini-b-rv1103_defconfig
$ make

This produces idbloader.img and u-boot.img for flashing to the SPI NAND, plus u-boot-rockchip-usb471.bin and u-boot-rockchip-usb472.bin for booting over USB.

Boot over USB (maskrom mode)

Hold the BOOT button while applying power (or leave the boot media blank) and the BootROM enters maskrom mode on the USB OTG port, appearing as USB ID 2207:110c. U-Boot then runs entirely from RAM; nothing is written to the flash.

Send the two images with a maskrom download tool such as rockusb or rkdeveloptool (note that the loader format parser in older rkdeveloptool versions is not needed here, since these are raw images):

$ rockusb download-boot u-boot-rockchip-usb471.bin u-boot-rockchip-usb472.bin

Flash U-Boot into the SPI NAND

Enter maskrom mode as above, then use a loader from rkbin to run the Rockchip usbplug and write the images:

$ cd <path-to-rkbin>
$ ./tools/boot_merger RKBOOT/RV1106MINIALL.ini
$ ./tools/upgrade_tool db rv1106_download_*.bin
$ ./tools/upgrade_tool wl 0x200 idbloader.img
$ ./tools/upgrade_tool wl 0xa00 u-boot.img

Power cycle the board and U-Boot output appears on UART2 (115200,8N1).