Segger J-Link Debugger

The CMSIS-Toolbox organizes for debuggers projects and configuration options. This chapter explains the usage of the Segger J-Link GDB Server in combination with the CMSIS-Toolbox.

• Extended Options explains additional configuration features that are required in specific use-cases.

Other manual sections describe how to configure debuggers:

• Run and Debug Configuration explains overall structure and how projects and images are configured.
• Debugger Configuration - J-Link Server contains details about the options that are specific to J-Link.

Extended Options

The section Debugger Configuration - J-Link Server contains the J-Link configuration for typical systems.

connect:

Configures the behavior for connecting J-Link to the hardware target for interactive debug.

connect:		Description
mode:	Required	Selects the connect mode: attach, halt (default).

Connect Mode	Description
attach	Do not change state of the core(s). No reset is executed.
halt	Halt core(s) after connect.

reset:

Configures the reset behavior for each core when a reset is requested during interactive debug.

reset:		Description
- pname:	Optional	Identifies the processor (not requried for single core system).
type:	Required	Selects the reset type: hardware, system (default), core.

Reset Types	Description
hardware	Use the J-Link reset pin reset mode.
system	Use the J-Link normal reset mode.
core	Use the J-Link core reset mode.

Examples:

debugger:
  name: J-Link Server       # default connect, halt and reset behavior

debugger:
  name: J-Link Server
  connect: attach           # connect without reset and without CPU state change
  reset:
    - type: system          # use system reset

debugger:
  name: J-Link Server
  connect: halt             # halt CPU after connect
  reset:
    - pname: Core0          # for Core0
      type: hardware        # use hardware reset
    - pname: Core1          # for Core1
      type: core            # use core reset