https://devzone.nordicsemi.com/f/nordic-q-a/6389/how-to-view-register-values-in-interrupt-service-routine-sI want to see register values in interrupt service routines after a timer timeout. However, when I enable debugger in Keil, it only iterates once to the end of main function, and stops. How can I get into the interrupt service routine and view the registeren-USTelligent Community 13Wed, 08 Apr 2015 06:43:07 GMThttps://devzone.nordicsemi.com/thread/22282?ContentTypeID=1Wed, 08 Apr 2015 06:43:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6d19847-5af1-4325-8cb4-4a2cf92af520Susheel Nuguru<p>Adding to John&#39;s answer, After hitting your breakpoint in the ISR,</p> <pre><code>you can see ARM registers by selecting View-&gt;Register Window you can see nRF51 registers by selecting Peripherals-&gt;System Viewer-&gt;TIMER </code></pre><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22283?ContentTypeID=1Tue, 07 Apr 2015 13:02:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:11ec821a-e52a-46ad-b282-0ec7be66f50bJohn<p>You could set a breakpoint in the interrupt service routine you are interested and just let the application run after you start the debug session. Then it will stop when the ISR is entered.</p><div style="clear:both;"></div>