That was a silly library, full of middleware and memory leaks. Debugging libswd was a good way to get familiar enough with SWD to write a replacement really quickly :P

This still doesn't work reliably, it seems to have the same unsynchronization bug that the old code was having. But it's much smaller and easier to understand now!

Some silly bugs are undoubtedly lurking here, but sometimes this will successfully read and write target RAM :)

For the vendor code to make it through string conversions unharmed, we should make it part of the printable ASCII subset. Fixes compatibility with xusb when reading WCID descriptor.

Just saw Paul's note about USB DMA from Flash being sketchy. In the boot loader it doesn't matter since we exec from RAM anyway, but we might as well un-const the WCID descriptor for consistency.

Thought this would make the win32 dfu-util less spammy. No such luck, but it seems like a good idea anyway.

FC-Boot works now, no need for this.

This is some Microsoft-specific gunk which allows us to work with usermode apps without any onerous driver installation. Much better user experience!

Note that this now requires a debugger that can issue Mass Erase in order to reprogram the boot loader!