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From Nordic: Automating Power Profiler Kit measurements from the command line

Symmetry Electronics Team in Blogs on October 24, 2019

About Symmetry Electronics Team

Established in 1998, Symmetry Electronics is a focused global distributor of wireless connectivity solutions, sensors, and audio-video technologies. Offering comprehensive design support and available-to-ship inventory, Symmetry is committed to helping engineers accelerate time to market, reduce costs, and offer modern solutions for their IoT designs. Acquired by the Berkshire Hathaway company TTI, Inc. in 2017, Symmetry Electronics is headquartered in Los Angeles with international offices in Mexico, Canada, and China.

Nordic's Power Profiler Kit (PPK) is an inexpensive piece of hardware that can provide a significant amount of insight into the operation and performance of your project. Although there is a lot that you can learn by experimenting with the PPK using the Power Profiler app that's available inside nRF Connect for Desktop, the PPK can also be integrated deeper into your workflow to provide insight into how your design is performing as the hardware/software matures.

Regardless of whether or not you've used the PPK before it's a good idea to take a few minutes to check out the excellent "getting started" video here to remind yourself of its operation and nomenclature.


Connecting the PPK

The communication between the PC and the PPK uses Segger's Real-Time Transfer (RTT) functionality. This is essentially a very fast socket that is created by the J-Link debug probe that moves data between the J-Link drivers on a PC and a some RAM buffers on the microcontroller. The PPK itself doesn't have an onboard J-Link like Nordic development kits do so the typical scenario is to have the PPK simply hijack the Device Under Test's (DUT's) debug probe on a development kit. A standalone J-Link or an ancillary development kit can also be used to talk to the PPK if the DUT needs to use its own debug probe for programming or debugging. The various scenarios are described in the PPK's documentation.

This blog post assumes that you have access to two development kits and it uses the measuring current on an nRF5 DK while debugging configuration. In short, this look like:

  • An unmodified development kit plus a 10-pin, IDC cable is acting as the PPK's J-Link.
  • The IDC cable runs from the unmodified development kit's "Debug out" header to the PPK's "Debug in" header.
  • The development kit to use as the DUT has been modified so its "SB9" solder bridge is no longer shorted.
  • The PPK itself is plugged into the DUT development kit and the PPK's "DUT select" switch is set to "DK", the "Power select" switch is set to "DK", and the "COM" switch is set to "EXT".


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>>CLICK HERE TO KEEP READING

 

Source: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/ppk_5f00_api

 

Looking to integrate Nordic products with your design? Our Applications Engineers offer free design and technical help for your latest designs. Contact us today!

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Symmetry Electronics Team in Blogs on October 24, 2019

About Symmetry Electronics Team

Established in 1998, Symmetry Electronics is a focused global distributor of wireless connectivity solutions, sensors, and audio-video technologies. Offering comprehensive design support and available-to-ship inventory, Symmetry is committed to helping engineers accelerate time to market, reduce costs, and offer modern solutions for their IoT designs. Acquired by the Berkshire Hathaway company TTI, Inc. in 2017, Symmetry Electronics is headquartered in Los Angeles with international offices in Mexico, Canada, and China.

Why partner with Symmetry Electronics? Symmetry's technical staff is specially trained by our suppliers to provide a comprehensive level of technical support. Our in-house Applications Engineers provide free design services to help customers early in the design cycle, providing solutions to save them time, money and frustration. Contact Symmetry for more information.

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