A quick question about SWD vs JTAG…is there a functionality difference between the TMS/TCK/TDI/TDO/TRST JTAG interface and the SWDIO/SWCLK SWD interface?
More detail: I used the programmer shield with a Blackmagic Probe and it worked great. Then I got out the breadboard and only connected 3.3, RST, GND, TMS, and TCK in a SWD configuration and I noticed no change in functionality–it still worked great. Finally I tweaked the GPIO pin remap in main.cpp to disable remapping for JTAG but keep the remapping for the SWD pins, and again I noticed no difference–except that I was able to use D3-D5 to control an LED with Tinker while still debugging.
I’m just curious if a debugging guru out there might know if I would be losing something by switching to the SWD-only interface. It would be great to be able to get a bunch of pins back while retaining the ability to step through code!