Back in March, I was fortunate enough to pick up an interesting little cheap RISC-V board off AliExpress and begin messing around. There was a buildroot patch released which compiled well but didn’t include full functionality at the time.
The following will provide the steps I took to build the K210 image for my MAiX BiT from a staging repo, but will eventually be available from Buildroot’s master repo
Pulling the repo
The K210 changes didn’t exist in the Buildroot’s master during the time of testing, so Damien’s repo is referenced until changes are merged
# git clone https://github.com/damien-lemoal/buildroot.gitor
# git clone git://git.buildroot.net/buildrootMake Menuconfig
Here’s the fun part
# make kendryte_k210_defconfig
# make menuconfigThis part copies over the K210 config an allows you to change packages and settings before compiling the final binary
Build
Once you’ve made your final changes, its time to bring everything together
# make -j 8(8 because that’s how many cores I have, feel free to add or subtract)
Burn Burn Burn
We’re almost there, now its time to copy that image onto the K210’s memory
# kflash -B bit_mic -b 115200 -p /dev/ttyUSB0 output/images/loader.binMine board is a SiPEED MAiX BiT, but kflash supports other boards as well:
“kd233”, “dan”, “bit”, “bit_mic”, “goE”, “goD”, “maixduino”, “trainer”
(Also, I was only able to get 115200 baud to work, higher speeds may work on other boards)
Hello K210
Your board is ready for use. Fire up your serial monitor and connect at 115200 baud
# screen /dev/ttyUSB0 115200You should be presented with a prompt. Have Fun!
Final Sources
Vowstar’s Nommu Github
Damien’s Buildroot Github
Buildroot K210 Patch Thread