Sam4, Hello Scrollbuffer

• Extends the previous sample with:

  • A large scroll-buffer for all regular output, which is just the trace-output in this sample.
  • Demonstrates using that, and shows switching from STDOUT to the windowed environment on-the-fly while tracing ...

• Test and demo:

  • Show effect of invalidate() (on scrollbuffer)
    • Requires source update and build ...