IAR Information Center for Arm

• Important information
• New features
• Known problems
• Program corrections
• User guide corrections
• Miscellaneous
• Release history

Important information

• Linux drivers for SEGGER J-Link debug probes
  The drivers and documentation for SEGGER J-Link debug probes are NOT automatically installed during the product installation in Linux. Download and install the J-Link Software and Documentation Pack for Linux from https://www.segger.com/downloads/jlink/

• J-Link Ultra can be calibrated to ensure accurate power measurements. To calibrate J-Link Ultra follow these steps:

  1. Make sure the J-Link Ultra JTAG connector is disconnected from the target board
  2. Connect J-Link Ultra to the PC
  3. Start J-Link Commander (...\arm\bin\jlink.exe)
  4. Type "calibrate"

• The J-Link/J-Trace probe has a built-in flash programming capability for some devices. This capability might in some cases conflict with the flash loader mechanism provided by the debugger. For example when disabling the debugger flash loader with the intent of debugging directly in RAM, the J-Link/J-Trace built-in flash loader might still be active causing unexpected results. The J-Link/J-Trace built-in flash loader can be enabled/disabled using the J-Link control panel accessible from the Windows task bar when the Embedded Workbench is in debug mode.

• To J-Link DCC file names have changed in version 5.20. Use JLINKDCC_Process.c, JLINKDCC.h, JLINKDCC_HandleDataAbort.s instead of DCC_Process.c, DCC_Process.h, and DCC_HandleDataAbort.s.

• To debug with J-Link on Windows, the USB driver has to be installed. The driver is available in the ...\arm\drivers\JLink directory in the installation folder.

• For more information on installing J-Link, refer to the IAR Embedded Workbench Debugging Guide and the J-Link / J-Trace User Guide.

New features

See New features for the IAR C-SPY Debugger.

Known problems

See Known problems for the IAR C-SPY Debugger.

Program corrections

See Program corrections for the IAR C-SPY Debugger.

User guide corrections

See User guide corrections for the IAR C-SPY Debugger.

Miscellaneous

• J-Link is shipped with a 20-pin JTAG connector. 14-pin JTAG targets can be connected with a cable as shown below:

  

• Debugging multiple ARM cores

• J-Link can handle multicore debugging. In this case multiple ARM devices are connected to the same JTAG connector as shown below:

  

Release history

See IAR C-SPY Debugger Release history.