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J-Link RTT for easy debug prints

Not really a question, but it took me way to long to find out about J-Link RTT (i.e. j-link Real Time Terminal for easy debug printing so I thought I would mention it for future searchers on the subject.

If you have been using serial to get trace output on the dev boards and are looking for an option to get multiple channels of text output (and input!) with just a few .c files on your target device, you might want to check it out:

www.segger.com/jlink-real-time-terminal.html

Also really loving the Tag-Connect form factor for connecting my little target board to J-Link if you haven't checked it out.

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  • Turns out that's actually quite easy. I just had to upgrade to the latest J-Link Version(currently V.4.96C) and disable "use MicroLIB" in the Keil-Project-Settings (Tab Target) to get rid of:

    "Error: L6915E: Library reports error: __use_no_semihosting was requested, but a semihosting fputc was linked in"

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  • Turns out that's actually quite easy. I just had to upgrade to the latest J-Link Version(currently V.4.96C) and disable "use MicroLIB" in the Keil-Project-Settings (Tab Target) to get rid of:

    "Error: L6915E: Library reports error: __use_no_semihosting was requested, but a semihosting fputc was linked in"

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