Using SWD with nRF52832 via custom software

RE: Using SWD with nRF52832 via custom software

gamnes — Fri, 02 Jun 2017 17:07:14 GMT

Hi, This blog post was just uploaded: devzone.nordicsemi.com/.../

Hopefully this includes enough information on the SWD protocol and the interfacing towards the nRF52832.

RE: Using SWD with nRF52832 via custom software

daguro — Fri, 17 Mar 2017 20:06:51 GMT

I had seen the drawings in that docx file before. From the drawing, I assumed that data was sampled on the negative phase of the clock, as it is in the middle of the clock cell. From the drawing, it would appear that clock cycles are delineated by the rising edge and define the set up and hold time for the negative edge which is where the data is sampled. I implemented it as such , and now need to revise my implementation.

RE: Using SWD with nRF52832 via custom software

guraaf — Wed, 01 Mar 2017 17:31:55 GMT

Perfect. This helps tremendously. Appreciate it. Thanks

RE: Using SWD with nRF52832 via custom software

run_ar — Wed, 01 Mar 2017 10:29:00 GMT

Added an attachment. Note that this is work in progress. Please let me know if this helps or not.

EDIT: had to remove the attachment due to copyright issues.

RE: Using SWD with nRF52832 via custom software

guraaf — Thu, 02 Feb 2017 01:37:28 GMT

"run_ar" I went through the document but it only describes how to program, erase, control the nRF52. Which will be super useful once I get the SWD working. But for now, this doc only refers me to the ARM infocenter which isn't very helpful. I have the protocol but NRF52 doesn't respond. Do you have someone who can confirm how the nRF52 implements the SWD? infocenter.arm.com/.../index.jsp

RE: Using SWD with nRF52832 via custom software

guraaf — Wed, 01 Feb 2017 13:28:57 GMT

Good idea. Will look at this as well. Thanks for the pointer.

RE: Using SWD with nRF52832 via custom software

guraaf — Wed, 01 Feb 2017 13:28:39 GMT

No, somehow I missed it. Reading it. Looks very informative. Thanks a lot.

RE: Using SWD with nRF52832 via custom software

Roger Clark — Wed, 01 Feb 2017 10:25:34 GMT

You may like to look at the source code for something like the Blackmagic probe.

github.com/.../blackmagic

Its open source and is compatible with the nRF5x series, so you should be able to work out how it controls the SWD and SWCLK lines

RE: Using SWD with nRF52832 via custom software

run_ar — Wed, 01 Feb 2017 09:26:55 GMT

Did you look at our whitepaper, nRF52832 Production Programming?