Segger J-Link - Page 118

118 CHAPTER 3 J-Link software and documentation package
J-Link / J-Trace (UM08001) ©
2004-2017 SEGGER Microcontroller GmbH & Co. KG
Syntax
-endian <endianess>
Example
jlinkgdbserver -endian little
3.3.5.4 -if
Description
Selects the target interface which is used by J-Link to connect to the device. The
default value is JTAG.
Note: Using GDB Server CL this option is mandatory to correctly connect to the
target, and should be given before connection via GDB.
Syntax
-if <Interface>
Example
jlinkgdbserver -if SWD
Add. information
Currently, the following values are accepted for <Interface>:
•JTAG
•SWD
•FINE
•2-wire-JTAG-PIC32
3.3.5.5 -ir
Description
Initializes the CPU register with default values on startup.
Note: For the GUI version, this setting is persistent for following uses of GDB
Server until changed via -noir or the GUI.
Example
jlinkgdbserver -ir
3.3.5.6 -excdbg
Syntax
-excdbg <nSteps>
Description
Enables exception debugging. Exceptions on ARM CPUs are handled by exception
handlers. Exception debugging makes the debugging of exceptions more user-
friendly by passing a signal to the GDB client and returning to the causative instruc-
tion.
In order to do this, a special exception handler is required as follows:
__attribute((naked)) void OnHardFault(void){
__asm volatile (
" bkpt 10 \n"
" bx lr \n"
);
}