Getting started, can't connect to nRF51 dev board

[Brian]

Hey guys,

Sorry to a basic question here, but it's been a few hours and I still can't get a connection to either of two brand new nRF51 dev boards, trying both on WindowsXP and MacOS.

See attached screenshot for Windows XP. JLink.exe seems to connect, but when I try to load the blinky .hex file via the Windows app J-Flash, it says "Error: Could not perform target reset"

Same in MacOS, typing JLinkExe... SEGGER J-Link Commander V4.96l ('?' for help) Compiled Feb 25 2015 10:24:59 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 Found 1 JTAG device, Total IRLen = 4: Cortex-M0 identified. Target interface speed: 100 kHz

Alright... this has got to be a simple answer here for something I'm missing. Pretty bad initial experience here with Nordic tools.

Thanks so much! Brian

[Brian]

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