Failed to execute MI command

[leifzars]

Post port from CodeWarrior to KDS 2.0.0.

I get this when tiring to start a debugging session.

Error in final launch sequence

Failed to execute MI command:

tbreak main

Error message from debugger back end:

Cannot access memory at address 0x17bca

Cannot access memory at address 0x17bca

The only way I have found around this is to power on the K20 right before the code download begins.

Any thoughts on how to fix this?

SEGGER J-Link GDB Server V4.92 Command Line Version

JLinkARM.dll V4.92 (DLL compiled Sep 30 2014 09:33:42)

-----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:                 MK20DN512xxx10

Target interface:              JTAG

Target interface speed:        1000kHz

Target endian:                 little

Connecting to J-Link...

J-Link is connected.

Firmware: J-Link V9 compiled Sep 29 2014 18:56:38

Hardware: V9.00

S/N: 269301025

OEM: SEGGER-EDU

Feature(s): FlashBP, GDB

Checking target voltage...

Target voltage: 3.38 V

Listening on TCP/IP port 2331

Connecting to target...ERROR: Could not connect to target.

Target connection failed. GDBServer will be closed...Restoring target state and closing J-Link connection...

Shutting down...

[leifzars · Accepted solution]

Found my problem, it was self inflicted. I was toggling a JTAG line that was causing the debugger to fail. Pin A5 on a 80 pin k20