J-Link / J-Trace User Guide (UM08001) - Microcontrollers
J-Link / J-Trace User Guide (UM08001) - Microcontrollers
J-Link / J-Trace User Guide (UM08001) - Microcontrollers
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5.5 Multi-core debugging<br />
J-<strong>Link</strong> / J-<strong>Trace</strong> is able to debug multiple cores on one target system connected to the<br />
same scan chain. Configuring and using this feature is described in this section.<br />
5.5.1 How multi-core debugging works<br />
Multi-core debugging requires multiple debuggers or multiple instances of the same<br />
debugger. Two or more debuggers can use the same J-<strong>Link</strong> / J-<strong>Trace</strong> simultaneously.<br />
Configuring a debugger to work with a core in a multi-core environment does not<br />
require special settings. All that is required is proper setup of the scan chain for each<br />
debugger. This enables J-<strong>Link</strong> / J-<strong>Trace</strong> to debug more than one core on a target at<br />
the same time.<br />
The following figure shows a host, debugging two ARM cores with two instances of<br />
the same debugger.<br />
Debugger<br />
Instance 1<br />
ARM1<br />
Host (PC)<br />
USB<br />
J-<strong>Link</strong><br />
JTAG<br />
Debugger<br />
Instance 2<br />
Target hardware ARM2<br />
Both debuggers share the same physical connection. The core to debug is selected<br />
through the JTAG-settings as described below.<br />
J-<strong>Link</strong> / J-<strong>Trace</strong> (<strong>UM08001</strong>) © 2004-2010 SEGGER Microcontroller GmbH & Co. KG<br />
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