Segger J-Link with Adafruit Feather M4

Contrary to the Feather nRF52840, the Feather M4 doesn't feature an SWD connector.

Since the board is very close to the Feather M0, the clues Adafruit provides with the Proper Debugging of ATSAMD21 Processors tutorial apply to the Feather M4.

The board provisions SWD pads for the SWDIO (data) and SWCLK (clock) signal.

Adafruit has posted the procedure at Make a Simple JTAG Debugging FeatherWing for the M0.

Thanks to its built-in 3.3.V regulator, the Adafruit Feather M4 can be powered by the Segger J-Link with +5V. The 3.3V pin provides the voltage reference to the programmer-debugger.

Debugging can start now with the command-line J-Link or the GUI Ozone!

Segger J-Link Programmer-Debugger

Posted: 31 Jan 2020
Updated:

Segger J-Link with Adafruit Feather M4​

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Segger J-Link with Adafruit Feather M4