Add Support for Serial Bootloaders using USB Stacks
This release of Tockloader is designed to support the Tock Bootloader on the Nano 33 BLE board based on the nRF52840. Since that board does not have an FTDI chip, the bootloader uses the nRF52's USB peripheral. This requires a new method for entering the bootloader, and Tockloader now supports setting the baud rate to 1200 to instruct the chip to enter the bootloader.
Other changes:
- Moved some output to only on
--debug
. - Added support for TABs that contain TBFs of different lengths.
- Added microbit v2 over openocd as known board.
- Added set start address command.