8.10.00 J-TRACE ARM Segger Microcontroller Systems, 8.10.00 J-TRACE ARM Datasheet - Page 123

• Manufacturer Part Number: 8.10.00 J-TRACE ARM
• Description: JTAG EMULATOR ARM7/ARM9 ETM
• Manufacturer: Segger Microcontroller Systems
• Type: Emulatorr

Specifications of 8.10.00 J-TRACE ARM

• Contents: Emulation Module
• For Use With/related Products: ARM7, ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 899-1006

5.10 J-Link script files
5.10.1 Actions that can be customized
5.10.1.1 ResetTarget()
5.10.1.2 InitEMU()
5.10.1.3 InitTarget()
5.10.2 Script file API functions
J-Link / J-Trace (UM08001)
In some situations it it necessary to customize some actions performed by J-Link. In
most cases it is the connection sequence and/or the way in which a reset is per-
formed by J-Link, since some custom hardware needs some special handling which
can not be integrated into the generic part of the J-Link software. J-Link script files
are written in C-like syntax in order to have an easy start to learning how to write J-
Link script files. The script file syntax does support most statements (if-else, while,
declaration of variables, ...) which are allowed in C, but not all of them. Moverover,
there are some statements that are script file specific. The script file allows maxi-
mum flexibility, so almost any target initialization which is necessary, can be sup-
ported.
The script file support allows customizing of different actions performed by J-Link. If
an generic-implemented action is replaced by an action defined in a scriptfile
depends on if the corresponding function is present in the scriptfile. In the following
all J-Link actions which can be customized using a script file, are listed and
explained.
Decsription
If present, it replaces the reset strategy performed by the DLL when issuing a reset.
Prototype
void ResetTarget(void);
Decsription
If present, it allows configuration of the emulator prior to starting target communica-
tion. Currently this function is only used to configure if the target which is connected
to J-Link has an ETB or not. For more information how to configure the existence of
an ETB, please refer to Global DLL variables on page 126.
Prototype
void InitEMU(void);
Decsription
If present, it can replace the auto-detection capability of J-Link. Some targets can
not be auto-detected by J-Link since some special target initialization is necessary
before communication with the core is possible. Moreover, J-Link uses a TAP reset to
get the JTAG IDs of the devices in the JTAG chain. On some targets this disables
access to the core.
Prototype
void InitTarget(void);
In the following, the API functions which can be used in a script file to communicate
with the DLL are explained.
© 2004-2011 SEGGER Microcontroller GmbH & Co. KG
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