[firmware] add missing knock-knock code

This program gets loaded into the PIC on the ADK
baseboard. It controls the erase line on the SAM3X.
When it receives the proper signal from the host,
it will erase the flash memory on the SAM3X.

Change-Id: I2f2838ccc75871fc2777a87bd9be34a19848fcc6
2 files changed
tree: ea56daae314de43adda8965affb35fec0e61d8c7
  1. hardware/
  2. library/
  3. MakefileBasedBuild/
  4. tools/
  5. .gitignore