Programming different nRF51822 boards

RE: Programming different nRF51822 boards

Nguyen Hoan Hoang — Fri, 19 Jun 2015 21:25:24 GMT

You will need to connect to 3.3v to the VCC pin 1. That pin is for sensing the target voltage.

RE: Programming different nRF51822 boards

george — Fri, 19 Jun 2015 18:05:28 GMT

I am trying to program a custom board as well. I have the SWDIO and SWDCLK soldered to the board in question. I also have power and ground connected. My regulator comes alive and I can see my 3.3V rail up. I also have tried putting a 100k pull-up on SWDIO and 100k pull-down on SWDCLK as prescribed here.

www.keil.com/.../ulink2_hw_connectors.htm

I am still having issues getting it to program. Any thoughts on what it could be?

RE: Programming different nRF51822 boards

Shlomo Zippel — Fri, 15 May 2015 22:47:10 GMT

This is super helpful! I assume you meant PTR5518 pin 9 to ground and not pin 7

RE: Programming different nRF51822 boards

carthago — Wed, 13 Aug 2014 10:45:31 GMT

I used the pin 6 and 7 for the BLE_Health thermometer with NRF Break Out Board. how do you do pin assignment? state 20 and 22.

Thanks

RE: Programming different nRF51822 boards

Chris Hodapp — Mon, 05 May 2014 14:13:12 GMT

Thank you for that link.

As for my own setup, I soldered a series of thin wires to each contact, routed them through the holes in some perfboard, soldered the other side to a header, and hot-glued everything in place. It's very ugly, but it works and it's secure.

However, it was enough work that the module you linked to is probably preferable (plus it has all the GPIOs, it looks like).

RE: Programming different nRF51822 boards

John Kolovson — Mon, 05 May 2014 12:58:21 GMT

Chris, thanks for the detailed explanation. I'm just starting to get the pin outs figure out. Do you have photo of your setup by any chance ? Did you solder header pins on to PTR5518 directly ? Curious to see how you are going about it.

I ordered the board from here www.ebay.com/.../121113398808

RE: Programming different nRF51822 boards

Chris Hodapp — Thu, 01 May 2014 21:45:38 GMT

John,

I am using a PTR5518 as well as a J-Link Edu here.

I don't know if you resolved your pinout issue, but here is how I did it:

PTR5518 pin 7 to ground.
PTR5518 pin 10 to Vcc (3.3 V in my case)
PTR5518 pin 4 to JTAG pin 7 (SWDIO)
PTR5518 pin 5 to JTAG pin 9 (SWCLK)
JTAG pin 1 to the same Vcc
JTAG pin 4 to ground

As for the headers & SDK, I found that you can generally use them, but some changes are needed here and there. The board obviously has no LEDs or buttons on its own, so you must be mindful of that (and I don't believe it exposes the same pins as the LEDs on the eval board). The board has a 250 ppm external crystal rather than a 25 ppm one, and so you must account for this in the SOFTDEVICE_HANDLER_INIT call (it seems to be the same problem documented here). I had modified my code to use something like what was here:


    NRF_CLOCK->XTALFREQ = 0;
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART = 1;
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
    SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, false);

to replace SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false);

(It seems like I should be able to just switch that line to use NRF_CLOCK_LFCLKSRC_XTAL_250_PPM instead but for some reason this does not work , nor does the 500 ppm setting.)

Finally, a question for you: What is the breakout board you show in the photo?

RE: Programming different nRF51822 boards

FormerMember — Thu, 24 Apr 2014 08:57:35 GMT

Yes, he can copy the example codes to the custom made board. The chips are the same in both cases, the difference between the development kit and the custom made board is what is connected to the I/Os (pins) on the nRF51822 chip.

RE: Programming different nRF51822 boards

John Kolovson — Tue, 15 Apr 2014 12:38:26 GMT

David, that was actually my next question. I still haven't found an answer. If you do please let me know.

I think I have the pinouts figured out.

RE: Programming different nRF51822 boards

David — Mon, 14 Apr 2014 15:16:46 GMT

Sorry for hijacking this thread a little bit, but since he is using nRF51822 on a board that is not from dev/eval kit, can he still use the header files provided in the nRF51 SDK? (and the example code as well?)

RE: Programming different nRF51822 boards

Nguyen Hoan Hoang — Mon, 14 Apr 2014 13:37:04 GMT

Jtag connector pinout here

infocenter.arm.com/.../index.jsp

and here

www.support.code-red-tech.com/.../HardwareDebugConnections

RE: Programming different nRF51822 boards

John Kolovson — Mon, 14 Apr 2014 11:14:43 GMT

I found those pins on the breakout board but they are split apart as you can see on the diagram. Also I have the J-Link EDU www.segger.com/j-link-edu.html, which has 20 pins. How can I connect just those pins and they are split up ?

Also what about the 3rd Party module ?

RE: Programming different nRF51822 boards

Nguyen Hoan Hoang — Mon, 14 Apr 2014 10:52:57 GMT

You need to find the SWDIO & SWDCLK pins and connect them to the jtag along with the power & ground pins.