How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

tesc — Fri, 22 Jul 2016 15:18:30 GMT

Both will work fine. If an external board is detected on both P19 and P20 then the board on P19 will be selected.

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

CMOS27 — Fri, 22 Jul 2016 14:57:08 GMT

I realize I am late to the party, but why do you recommend using p19 over p20? Are the connections not electrically the same? I ask because I am also about to use the nRF51-DK to program a prototype board, and have many 0.1" connectors/housings on hand but none of the tiny 10 pin connectors used by p19...

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

tesc — Fri, 22 Apr 2016 11:46:29 GMT

The checkmark, not the arrow. Click the checkmark. The round icon with what looks a little like a V.

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

MARTIN FR — Fri, 22 Apr 2016 11:33:23 GMT

Thank i did that could you help me to verify this question button configuration please devzone.nordicsemi.com/.../

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

tesc — Fri, 22 Apr 2016 11:28:23 GMT

If you are happy with the answer it would be great if you could click on the checkmark icon to the left near the top of the answer, to mark the answer as correct.

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

MARTIN FR — Fri, 22 Apr 2016 11:19:51 GMT

Thank you so much for your kind reply and its really helped me and able to see printf statements could you please have a look at this question if possible could you help me with button configurations

devzone.nordicsemi.com/.../

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

RK — Fri, 22 Apr 2016 10:09:54 GMT

Doesn't have to be P08-P11 on your custom board, it can be any GPIOs you like, as long as you change the UART mapping to use them. But yes if you connect those pins to P.08-P11 on the DK and this is important make sure the DK itself is running something which DOES NOT USE THEM, ie a null piece of software which does nothing, then you should be able to use the USB-UART bridge on the DK with data from your custom board.

If you use SEGGER RTT however, you don't have to do any of this stuff and can just use the SWDIO and SWDCLK you already have connected.

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

MARTIN FR — Fri, 22 Apr 2016 09:56:27 GMT

do you mean i have to connect P0.08 ofNRF51DK to P0.08of my custom PCB ?and p0.11 to p0.11 inorder to see my printf statements

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

RK — Wed, 20 Apr 2016 07:58:26 GMT

you should really ask separate questions for things which are totally separate questions.

Just hook the test board's UART output pins up to P.08-P.11 on the nRF-DK you are using as a programmer, and make sure whatever the NRF-DK is running isn't using those pins too, then you can use the on-board USB serial to talk to the test board.

If you haven't routed any more pins out, then you can't do this because you have nothing to connect.

There are however SO many better ways than the ancient, troublesome UART for getting information out of a connected board. Since you're connected via the SWD interface, why not use SEGGER RTT which travels over the same pins, requires no extra connections nor a UART, UART-USB bridge and a terminal program on the PC.

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

MARTIN FR — Wed, 20 Apr 2016 07:48:13 GMT

could you tell me how can i check the putty terminal (serial emulator to see the funvtionality of NRF51 custom board because previously i have used NRF51DK to test the sfotware it works fine but now i would like to check each and every functions of the custom board by using putty terminal (UART) using printf statements could you suggest what would be best methods to follow inorder to check the output

RE: How to program custom PCB uisng SWCLK AND SWDIO TEST PINS

RK — Tue, 19 Apr 2016 16:33:08 GMT

Almost - right connections but not the best connector. P20 is debug out but it's the one for a connected shield. What you really want to connect to is P19, which is the real debug out. I suppose, if the pins on P20 are easier to connect to than the P19 .5" pitch debug out connector you can use them, but it's probably better to use P19 if you can. I use a breakout adaptor which makes patching that connector to just about anything fairly easy.