Based on usbd_cdc_acm in the Bouffalo Labs sdk example

Supported Chips

CHIP	Remark
BL702/BL704/BL706
BL616/BL618
BL808	D0 has no irq

Compile (note that BL616 is all that's tested)

• BL616/BL618

docker run --rm -t -v $(pwd):/build git.lerch.org/lobo/bouffalo_open_sdk:2f6477f BOARD=bl616dk CHIP=bl616

• BL702/BL704/BL706

make CHIP=bl702 BOARD=bl702dk

• BL808

make CHIP=bl808 BOARD=bl808dk CPU_ID=m0
make CHIP=bl808 BOARD=bl808dk CPU_ID=d0

Flash

docker run --rm --device /dev/ttyACM0 -v $(pwd):/build git.lerch.org/lobo/bouffalo_open_sdk:2f6477f flash BOARD=bl616dk CHIP=bl616 COMX=/dev/ttyACM0