Access to unit's IO pins through SWD interface.

RE: Access to unit's IO pins through SWD interface.

awneil — Mon, 11 Mar 2019 12:16:49 GMT

[quote userid="77903" url="~/f/nordic-q-a/44614/access-to-unit-s-io-pins-through-swd-interface/175304"]I don't really know which registers should be programmed[/quote]

See the Product Specification for register descriptions

RE: Access to unit's IO pins through SWD interface.

Leonid.K. — Mon, 11 Mar 2019 11:56:46 GMT

OK. Thanks.

I also have Algocraft WN-8 programmer connected to SWD bus and burning it with customer's file.

I can try to get access to peripheral pins of the using it. But I don't really know which registers should be programmed.

RE: Access to unit's IO pins through SWD interface.

awneil — Sat, 09 Mar 2019 12:36:20 GMT

So you're basically making your own debug adaptor?

That's going to be beyond the scope of the Nordic forum.

But, as far as the SWD interface goes, Nordic (like any other ARM licensee) has to abide by the standard spec - so look to the documentation from ARM...

You could also look at the open-source CMSIS-DAP.

But I would certainly start by using a standard debug probe - eg, JLink - and proving that you can achieve your requirements with that.

Then look at it's doing on the wires and, along with the ARM documentation, bas your implementation on that ...

RE: Access to unit's IO pins through SWD interface.

Leonid.K. — Sat, 09 Mar 2019 05:46:00 GMT

I'm using IO pins of Lattice device controlled by JTAG Technologies Provision software by Python code.

RE: Access to unit's IO pins through SWD interface.

awneil — Fri, 08 Mar 2019 22:00:44 GMT

What are you using to connect to SWD ?

[quote userid="77903" url="~/f/nordic-q-a/44614/access-to-unit-s-io-pins-through-swd-interface"]Is it possible to get an access to peripheral pins using SWD?[/quote]

I don't think you can directly, but you can use it to access the registers which control the pins.

You could also use it to load & run test code (possibly to RAM) ...