This is open source version for flash_tools, not perfect but open source totally. The current version also require python3 env, and if not please use tools to convert dts to dtb.
go get gopkg.in/ini.v1 github.com/pelletier/go-toml github.com/albenik/go-serialSwitch BL602 to program mode by pulling-up GPIO8 during booting, connect via the uart(which is hardcode now), and then run "go run flash_tool.go". Bin files are generated and then bl602 will be programmed.
Initially Golang version is only for mass production program with linux. Now, there are other better options for cross platform requirement. Thanks for these contributors.
Python version:
https://github.com/stschake/bl60x-flash
https://github.com/renzenicolai/bl602tool
Rust version:
https://github.com/spacemeowx2/blflash
https://github.com/mkroman/bouffalo-cli