Jlink debug in eclipse and mac

[julian]

I am able to debug in windows using uVision, and now I port it to use eclipse in mac, however, I am getting GDBServer will be closed error, anything clue what did I do wrong?

SEGGER J-Link GDB Server V4.84 Command Line Version

JLinkARM.dll V4.84 (DLL compiled Mar 28 2014 16:35:10)

-----GDB Server start settings----- GDBInit file: none GDB Server Listening port: 2331 SWO raw output listening port: 2332 Terminal I/O port: 2333 Accept remote connection: localhost only Generate logfile: off Verify download: on Init regs on start: on Silent mode: off Single run mode: on Target connection timeout: 5 sec. ------J-Link related settings------ J-Link Host interface: USB J-Link script: none J-Link settings file: none ------Target related settings------ Target device: nRF51822_xxAA_s110 Target interface: SWD Target interface speed: 30kHz Target endian: little

Connecting to J-Link... J-Link is connected. Firmware: J-Link OB-SAM3U128 V1 compiled Dec 11 2013 20:20:11 Hardware: V1.00 S/N: 480205216 Checking target voltage... Target voltage: 3.30 V Listening on TCP/IP port 2331 Connecting to target...ERROR: Could not connect to target. Target connection failed. GDBServer will be closed...

[julian]

on gdb trace 331,697 2-environment-cd /Users/julian/Documents/firmware/gcc 331,698 3-list-thread-groups 331,698 2^done 331,700 (gdb) 331,700 3^done,groups=[{id="i1",type="process"}] 331,701 4-gdb-set breakpoint pending on 331,701 (gdb) 331,701 4^done 331,701 (gdb) 331,702 5-enable-pretty-printing 331,703 5^done 331,703 (gdb) 331,704 6-gdb-set python print-stack none 331,704 6^done 331,704 (gdb) 331,705 7-gdb-set print object on 331,706 7^done 331,706 (gdb) 331,708 8-gdb-set print sevenbit-strings on 331,711 8^done 331,711 (gdb) 331,713 9-gdb-set charset ISO-8859-1 331,714 9^done 331,714 (gdb) 331,716 10set mem inaccessible-by-default off 331,716 11source .gdbinit 331,717 &"set mem inaccessible-by-default off\n" 331,717 10^done 331,717 (gdb) 331,717 &"source .gdbinit\n" 331,718 &".gdbinit: No such file or directory.\n" 331,718 11^error,msg=".gdbinit: No such file or directory." 331,718 (gdb) 331,719 12-gdb-set auto-solib-add on 331,719 12^done 331,719 (gdb) 331,721 13-target-select remote localhost:2331

337,744 13^error,msg="Remote communication error. Target disconnected.: Connection reset by peer." 337,744 (gdb) 337,745 &"\n" 337,745 ^done 337,746 (gdb)

[Ole Morten]

I suspect that what you see is an issue with OS X and the Segger OB's CDC implementation, in that OS X's CDC driver requires exclusive access that messes with the GDB server's connection to the chip. If so, you should be able to get things working by unloading the CDC driver. Take a look at this question over at Segger's forum for details.

[Nguyen Hoan Hoang]

JLink has an issue with CDC on the OSX. You can get a shell script here http://hg.cmason.com/nrf to disable CDC driver on OSX in order for JLink to work properly.

The best Eclipse plugins for OSX is here gnuarmeclipse.livius.net/.../

[julian]

Thanks for the reply I did the ./disable_cdc.sh

without the ./disable_cdc.sh

it will not reach "J-Link is connected." stage,

[julian]

I did not do anything, just do some debug in windows, and then switch back to mac, now the debug works totally no idea why