Must ORG application to be bootloader to 0x1800 !
latest versions are in github https://github.com/charlie-x/l1_demoboard
might need to correct some of the offsets in the gld scripts.
Usb device
application loader
application flashing
Bootloader HEX file
QT Windows Version of HID bootloader
Native versions of windows / osx and linux bootloader tool
application setup
Org your code to 0x1800 example :
program (xr) : ORIGIN = 0x1800, LENGTH = 0x2A9F6
jumper goes here, red wires are an LED, look for the jumper next to it.