On Fri, Jul 18, 2014 at 05:33:39PM +0800, Andrii Anpilogov wrote:
> When I run openocd with this config and it looks like nRF51 simple doesn’t 
> response to request command:
> Debug: 223 192 ftdi.c:982 ftdi_swd_run_queue(): JUNK DP read reg 0 = ffffffff

You'll need this hack for now:
https://gist.github.com/projectgus/224f06d0276affc69826 .

> > ./openocd -f interface/stlink-v2.cfg -f target/nrf51_stlink.tcl
> Open On-Chip Debugger 0.9.0-dev-00098-ge03eb89 (2014-07-15-18:05)
> Licensed under GNU GPL v2
> For bug reports, read
>       http://openocd.sourceforge.net/doc/doxygen/bugs.html
> Error: session's transport is not selected.
> Info : session transport was not selected, defaulting to JTAG
> Error: Debug adapter doesn't support 'jtag' transport

openocd -f interface/stlink-v2.cfg -c "transport select hla_swd" -f 
target/nrf51_stlink.tcl

HTH
-- 
Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software!
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