Enhancement request
Hi, I recently made work the dapboot with PlatformIO and libopencm3, but it would be great that this could be an out-of-the-box feature. I write the highboot-v1.11-bluepill-128.bin (on a 128k bluepill obviuslly) with the stlinkv2 and made this in platformio.ini on my Linux enviroment:
upload_protocol = dfu
upload_command = $PROJECT_PACKAGES_DIR/tool-dfuutil/bin/dfu-util -d 1209:db42 -D $SOURCE
I tested it on a windows VM, and it works (without driver requirement). Can this be added to platformio like upload_protocol = dapboot?
Procedure to upload the firmware
You have to activate BOOT1 and reset to activate the DFU, then change de BOOT1 again to the normal position, and upload the firmware 
This is de bootloader’s github: