tree a42d3957b59426863215b184c22e01c3f1c36861
parent 02b31998d5be751bfe2a55633b5c00f3c8cfc933
author Jonathan Bell <jonathan@raspberrypi.com> 1657035672 +0100
committer Jonathan Bell <jonathan@raspberrypi.com> 1660834828 +0100

probe: add CMSIS-DAP PIO-driven implementation

CMSIS-DAP implementations explicitly use CPU bitbash to control SWD and
SWDIO, but we can do better. Transfers are handed off to PIO in phases,
which gets us deterministic clock timing as well as freeing the CPU up
for other tasks.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>