Just for the heck of it, I am test-driving a RISCV Linux SBC called the Sipeed Lychee RV 86.
When I plugged it in, nothing happened. No console ouput on the USB tty, nothing on the screen. It turns out there is no software loaded on it: the flash memory slot is empty. So you need to provide your own storage, and own OS.
First attempt is with a "debian-minimal" install.
# dd if=debian-minimal-licheerv.img of=/dev/sdb bs=32K 134272+0 records in 134272+0 records out 4399824896 bytes (4.4 GB, 4.1 GiB) copied, 248.155 s, 17.7 MB/s
Those were the write speeds to my "Sandisk Extreme PLUS." Hmm... that does not seem to be an extreme speed, to me. It has a U3 designation. Oh well. UPDATE: Lexar x1000 was even worse: 15.7 MB/s and the write speed slows down, as you write more. Remind me never to buy Lexar SD cards again.
And it works! With the card inserted, I now get a login prompt on ttyUSB0 in 32 seconds. Not bad at all.
Somehow, it takes a long time for the Ethernet device to show up with ifconfig command? When it does, ifup usb0 is not working: ifup: unknown interface usb0
When I make usb0 interface known, the dhcp client will receive no offers, unfortunately. Despite the Ethernet light blinking, so there is network activity.
I have been able to work around the need for a proprietary MSWindows tool to use the Lichee RV disk images. With the OpenixCard tool, you can extract a normal image, that you can write with dd to an SDCARD.
$ file ~/Downloads/LicheeRV_Debian_86_480p.img /home/bram/Downloads/LicheeRV_Debian_86_480p.img: data ./OpenixCard -i ~/Downloads/LicheeRV_Debian_86_480p.img -d ... $ file /home/bram/Downloads/LicheeRV_Debian_86_480p.img.dump.out/LicheeRV_Debian_86_480p.img /home/bram/Downloads/LicheeRV_Debian_86_480p.img.dump.out/LicheeRV_Debian_86_480p.img: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x2,35,2), end-CHS (0x2,163,1), startsector 34336, 8064 sectors; partition 2 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x0,33,1), startsector 1, 2079 sectors $ sudo dd if=/home/bram/Downloads/LicheeRV_Debian_86_480p.img.dump.out/LicheeRV_Debian_86_480p.img of=/dev/sdb bs=1M 8237+1 records in 8237+1 records out 8637726720 bytes (8.6 GB, 8.0 GiB) copied, 435.776 s, 19.8 MB/s
The Debian image works great. I removed all X11 stuff, and will just use fb0.
I noticed that eth0 mac address is randomized at each boot, so I had to create an entry in /etc/network/if-pre-up file:
#!/bin/sh IFCONFIG=/sbin/ifconfig if [ ! -x $IFCONFIG ]; then exit 0 fi if [ "$IFACE" = eth0 ]; then $IFCONFIG $IFACE hw ether XX:XX:XX:XX:XX:XX fi
To set the timezone: $ timedatectl set-timezone America/Vancouver
If not using wifi, it is probably a good idea to remove xr829 from /etc/modules file.
I have been removing a lot of packages, trying to get a minimal install. To aide this effort, I decided to graph the dependencies, to see which cuts I can make in the dependency chains.