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  VS Arduino › › › Debugging Adafruit Feather M4 with JLink
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Rich R
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Debugging Adafruit Feather M4 with JLink
Jan 23rd, 2022 at 9:47pm
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I am just starting to do real debugging including step by step.  I have a JLink and am trying to debug an Adafruit M4 Feather using the SWD hardware.   Does anyone know if there is a tutorial for VM that I can start from?   I wasn't able to find a clean simple approach but am guessing I'm certianly not the first one to do it so I'm likely not looking in the right place.

Any help appreciated.
  
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Simon@Visual Micro
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Re: Debugging Adafruit Feather M4 with JLink
Reply #1 - Jan 24th, 2022 at 10:10am
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There is the below page which shows how to setup the software for use with the JLink and a SAMD board, like the Feather M4:
https://www.visualmicro.com/page/SAMD-Debugging.aspx

The SWD IO and CLK pins look to be broken out to pads on the underside of the board (depending on the model) so some soldering may be required to link these to the JLink.

NOTE: The 3.3v pin of the board will need connecting to Pin 1 of the JLink to ensure it can detect the board power, assuming the board is still being powered via the USB cable.
  
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Rich R
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Re: Debugging Adafruit Feather M4 with JLink
Reply #2 - Jan 25th, 2022 at 4:00pm
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Thanks, I tried to connect in a standard blink project but I dont see the debug->hardware option.  I'm on VS 17.01 Community 2022.   See attached, I think I'm missing something.  The J-Link software sees the device via USB.
  
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Re: Debugging Adafruit Feather M4 with JLink
Reply #3 - Jan 25th, 2022 at 4:08pm
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Thanks for the update.

Have you installed the WinUSB Driver for the JLink?
https://www.visualmicro.com/page/Zadig-Driver-Installation-Guide.aspx

The "Debug: Hardware" option is on the vMicro > Debugger Menu, and once selected go back to the vMicro > Debugger Menu, and you will be able to select the JLink as the probe.
  
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