nRF51422 Halts at sd_softdevice_enable on custom board.

[Keith Wakeham]

I've made a custom board with an nRF51422. The nRF51 part follows the reference schematics almost identically. After overcoming some reflow issues this board seems communicate well with the programmer. It's unable to transmit running any of the demo code which I've been attributing to difficulty reflowing the ST Micro Balun, but when I step through debug it's halting on the

return_value = sd_softdevice_enable(NRF_CLOCK_LFCLKSRC_XTAL_250_PPM, softdevice_assert_callback);

Seems this indicates that maybe the clock source isn't present, but it is, and I've check continuity several times to the chip and it "appears" good. Is there any other reason this would halt here? Is there a way to run it off the main clock temporarily to check? Could this be the result of attempting to power the device and having shorted ANT1 and ANT2 together causing the transceiver to die?

Any help would be appreciated. Some background on my difficulties in case it helps located at the url on my blog.

Thanks.

[Keith Wakeham]

Found how to run it on a simulated LFCLK source via the HFCLK. Still halts, so I'm beginning to believe I fried it. Thoughts?

[Hung Bui]

Hi Keith,

I am sorry for the late response. We are suffering the short of work force due to the vacation time.

Have you managed to fix the crystal issue ? You can test if the crystal running properly by using a oscilloscope.

I can see that you have got something running from your blog. Let us know if you need any assistance.

Hung

[Keith Wakeham]

Forgot I never accepted an answer on this. I think it was just the soft device working its way through the process but because it's pre-programmed I couldn't see it, and it just appeared to be halting. I couldn't step it though. But seems to be running fine if I don't go through debug mode line by line.