ArtInChip D21x board
The board is built around 88-pin D21x CPU with 64mb of DRAM included.
The board is capabile to run FreeBSD, but no support yet available.
This is a 'hello world' app using MDEPX real-time operating system. The app initializes DDR controller using proprietary blob (see aic directory).
Use T-Head compiler that supports (non-standard) instruction set extensions
$ export CROSS_COMPILE=/path/to/bin/riscv64-unknown-elf-
$ git clone --recursive https://github.com/mdepx/d21x
$ cd d21x
$ make clean all
Create a single-partition fat32 image and copy files to it
$ mkfs.vfat /dev/sdb
$ mount /dev/sdb /mnt
$ cp obj/d21x.aic aic/bootcfg.txt /mnt/
$ umount /mnt
