I love to use on board debugger of FRDM to debug off-board microcontroller. Today I found an issue of WRONG SWDIO.
I used to MDK since it can be used to read chip IDCODE in debugger configuration Window. The target is M0+, MKL25Z. I have multiple boards. Some boards can be read as regular as:
SWDIO: 0x0BC11477 for MKL25Z128 (M0+)
SWDIO:0x2BA01477 for MK20DX128 (M4)
Some other boards will be read as:
Due to wrong IDCODE, MDK refuses to download.
I guess it is hardware related issue. Is there anything I can do? Shorter cable? Layout issue?