Getting started, can't connect to nRF51 dev board

RE: Getting started, can't connect to nRF51 dev board

Stefan Birnir Sverrisson — Wed, 04 Mar 2015 10:03:59 GMT

As RK points out, you need to be aware of if you have an application that is supposed to be used with a softdevice, or without a softdevice. The streamlined way of flashing the softdevice and see what is going on is with nRFgo Studio. This method is also described in the getting started guide in the nRF51 SDK.

This thread talks about applications with and without softdevice

RE: Getting started, can't connect to nRF51 dev board

RK — Mon, 02 Mar 2015 12:11:36 GMT

If you are loading blinky at 0x16000 then that would indicate you are building to use with a softdevice, have you put a softdevice on? Or if you are building basic blinky with no softdevice then the code builds for, and goes at, 0x00000.

RE: Getting started, can't connect to nRF51 dev board

Brian — Mon, 02 Mar 2015 00:40:01 GMT

Ok... tried the command line, and it looks like the blinky demo was already programmed? But no blinky. This seems pretty basic, but no blinky.

What am I missing?

Thanks, Brian

$JLinkExe -device nrf51822_xxaa -if swd -speed 4000

SEGGER J-Link Commander V4.96l ('?' for help)

Compiled Feb 25 2015 10:24:59

Info: Device "NRF51822_XXAA" selected.

DLL version V4.96l, compiled Feb 25 2015 10:24:52

Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 28 2014 10:32:04

Hardware: V1.00

S/N: 681313228

VTarget = 3.300V

Info: Found SWD-DP with ID 0x0BB11477

Info: Found Cortex-M0 r0p0, Little endian.

Info: FPUnit: 4 code (BP) slots and 0 literal slots

Cortex-M0 identified.

Target interface speed: 1000 kHz

J-Link>loadbin mbed_blinky_NRF51822.hex 0x16000

Halting CPU for downloading file.

Downloading file [mbed_blinky_NRF51822.hex]...Info: J-Link: Flash download: Flash download into internal flash skipped. Flash contents already match

Info: J-Link: Flash download: Total time needed: 0.347s (Prepare: 0.087s, Compare: 0.252s,

Erase: 0.000s, Program: 0.000s, Verify: 0.000s, Restore: 0.006s)

O.K.

J-Link>r

Reset delay: 0 ms

Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.

J-Link>g

J-Link>exit