https://devzone.nordicsemi.com/f/nordic-q-a/86182/nrf52-dk-can-be-made-to-silently-reset-even-with-all-arm-fault-handlers-implementedWe are developing a product based on nRF52832 and we need to verify that in case of problems, the device will &quot;fail gracefully&quot;. So we looked at implementing the ARM handlers, and also making a test setup to verify that they are working OK. The test setupen-USTelligent Community 13Wed, 30 Mar 2022 07:35:33 GMThttps://devzone.nordicsemi.com/thread/360674?ContentTypeID=1Wed, 30 Mar 2022 07:35:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:200a5497-7cac-4d74-b597-48ae0c012211danmcb<p>trying to reply to Einar - but for some reason the reply button is not under your post. Yes, lockup turned out to be the cause. Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/360002?ContentTypeID=1Fri, 25 Mar 2022 12:37:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52332a41-1b28-4b08-87e2-ab73fd7e2647Einarh<p>Hello!</p> <p>Have you checked the <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fpower.html&amp;cp=4_2_0_17_8_2&amp;anchor=register.RESETREAS">reset reason register</a>?</p> <p>You can read this on boot to check if you had a LOCKUP reset (hardfault in hardfault) (this can only happen when you&#39;re not in debug interface mode)</p> <p>Best regards,</p> <p>Einar</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/359863?ContentTypeID=1Thu, 24 Mar 2022 16:00:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b97e3a79-6c0b-44c0-9737-a64446977d90danmcb<p>I got some compiler output for the two functions. First the one that DOES trigger a BUS FAULT:</p> <p></p> <p>00026678 &lt;evil_recursive&gt;:<br />&nbsp;&nbsp; 26678:&nbsp;&nbsp; &nbsp;b5f0&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;push&nbsp;&nbsp; &nbsp;{r4, r5, r6, r7, lr}<br />&nbsp;&nbsp; 2667a:&nbsp;&nbsp; &nbsp;4e4c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r6, [pc, #304]&nbsp;&nbsp; &nbsp;; (267ac &lt;evil_recursive+0x134&gt;)<br />&nbsp;&nbsp; 2667c:&nbsp;&nbsp; &nbsp;b083&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;sub&nbsp;&nbsp; &nbsp;sp, #12<br />&nbsp;&nbsp; 2667e:&nbsp;&nbsp; &nbsp;4604&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r4, r0<br />&nbsp;&nbsp; 26680:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26682:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26684:&nbsp;&nbsp; &nbsp;f004 fb8f &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 26688:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 2668c:&nbsp;&nbsp; &nbsp;4f48&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r7, [pc, #288]&nbsp;&nbsp; &nbsp;; (267b0 &lt;evil_recursive+0x138&gt;)<br />&nbsp;&nbsp; 2668e:&nbsp;&nbsp; &nbsp;4d49&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r5, [pc, #292]&nbsp;&nbsp; &nbsp;; (267b4 &lt;evil_recursive+0x13c&gt;)<br />&nbsp;&nbsp; 26690:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 26692:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26694:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 26696:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 26698:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 2669a:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2669c:&nbsp;&nbsp; &nbsp;f004 fa14 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 266a0:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 266a2:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 266a4:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 266a6:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 266a8:&nbsp;&nbsp; &nbsp;f004 fb7d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 266ac:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 266b0:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 266b2:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 266b4:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 266b6:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 266b8:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 266ba:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 266bc:&nbsp;&nbsp; &nbsp;f004 fa04 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 266c0:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 266c2:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 266c4:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 266c6:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 266c8:&nbsp;&nbsp; &nbsp;f004 fb6d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 266cc:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 266d0:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 266d2:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 266d4:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 266d6:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 266d8:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 266da:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 266dc:&nbsp;&nbsp; &nbsp;f004 f9f4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 266e0:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 266e2:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 266e4:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 266e6:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 266e8:&nbsp;&nbsp; &nbsp;f004 fb5d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 266ec:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 266f0:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 266f2:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 266f4:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 266f6:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 266f8:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 266fa:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 266fc:&nbsp;&nbsp; &nbsp;f004 f9e4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 26700:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 26702:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26704:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26706:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 26708:&nbsp;&nbsp; &nbsp;f004 fb4d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 2670c:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 26710:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 26712:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 26714:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26716:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 26718:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 2671a:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2671c:&nbsp;&nbsp; &nbsp;f004 f9d4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 26720:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 26722:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26724:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26726:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 26728:&nbsp;&nbsp; &nbsp;f004 fb3d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 2672c:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 26730:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 26732:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 26734:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26736:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 26738:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 2673a:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2673c:&nbsp;&nbsp; &nbsp;f004 f9c4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 26740:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 26742:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26744:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26746:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 26748:&nbsp;&nbsp; &nbsp;f004 fb2d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 2674c:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 26750:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 26752:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 26754:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26756:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 26758:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 2675a:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2675c:&nbsp;&nbsp; &nbsp;f004 f9b4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 26760:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 26762:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26764:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26766:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 26768:&nbsp;&nbsp; &nbsp;f004 fb1d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 2676c:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 26770:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 26772:&nbsp;&nbsp; &nbsp;9301&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r3, [sp, #4]<br />&nbsp;&nbsp; 26774:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26776:&nbsp;&nbsp; &nbsp;9400&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;str&nbsp;&nbsp; &nbsp;r4, [sp, #0]<br />&nbsp;&nbsp; 26778:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 2677a:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2677c:&nbsp;&nbsp; &nbsp;f004 f9a4 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 26780:&nbsp;&nbsp; &nbsp;682b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r5, #0]<br />&nbsp;&nbsp; 26782:&nbsp;&nbsp; &nbsp;4630&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r0, r6<br />&nbsp;&nbsp; 26784:&nbsp;&nbsp; &nbsp;212f&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r1, #47&nbsp;&nbsp; &nbsp;; 0x2f<br />&nbsp;&nbsp; 26786:&nbsp;&nbsp; &nbsp;441c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r4, r3<br />&nbsp;&nbsp; 26788:&nbsp;&nbsp; &nbsp;f004 fb0d &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2ada6 &lt;strrchr&gt;<br />&nbsp;&nbsp; 2678c:&nbsp;&nbsp; &nbsp;f3ef 8308 &nbsp;&nbsp; &nbsp;mrs&nbsp;&nbsp; &nbsp;r3, MSP<br />&nbsp;&nbsp; 26790:&nbsp;&nbsp; &nbsp;223c&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r2, #60&nbsp;&nbsp; &nbsp;; 0x3c<br />&nbsp;&nbsp; 26792:&nbsp;&nbsp; &nbsp;1c41&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;adds&nbsp;&nbsp; &nbsp;r1, r0, #1<br />&nbsp;&nbsp; 26794:&nbsp;&nbsp; &nbsp;e9cd 4300 &nbsp;&nbsp; &nbsp;strd&nbsp;&nbsp; &nbsp;r4, r3, [sp]<br />&nbsp;&nbsp; 26798:&nbsp;&nbsp; &nbsp;2000&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;movs&nbsp;&nbsp; &nbsp;r0, #0<br />&nbsp;&nbsp; 2679a:&nbsp;&nbsp; &nbsp;463b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;mov&nbsp;&nbsp; &nbsp;r3, r7<br />&nbsp;&nbsp; 2679c:&nbsp;&nbsp; &nbsp;f004 f994 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;2aac8 &lt;project_log&gt;<br />&nbsp;&nbsp; 267a0:&nbsp;&nbsp; &nbsp;6828&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r0, [r5, #0]<br />&nbsp;&nbsp; 267a2:&nbsp;&nbsp; &nbsp;4420&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r0, r4<br />&nbsp;&nbsp; 267a4:&nbsp;&nbsp; &nbsp;f7ff ff68 &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;26678 &lt;evil_recursive&gt;<br />&nbsp;&nbsp; 267a8:&nbsp;&nbsp; &nbsp;b003&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;sp, #12<br />&nbsp;&nbsp; 267aa:&nbsp;&nbsp; &nbsp;bdf0&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;pop&nbsp;&nbsp; &nbsp;{r4, r5, r6, r7, pc}<br />&nbsp;&nbsp; 267ac:&nbsp;&nbsp; &nbsp;0002bd28 &nbsp;&nbsp; &nbsp;.word&nbsp;&nbsp; &nbsp;0x0002bd28<br />&nbsp;&nbsp; 267b0:&nbsp;&nbsp; &nbsp;0002bd3c &nbsp;&nbsp; &nbsp;.word&nbsp;&nbsp; &nbsp;0x0002bd3c<br />&nbsp;&nbsp; 267b4:&nbsp;&nbsp; &nbsp;20003310 &nbsp;&nbsp; &nbsp;.word&nbsp;&nbsp; &nbsp;0x20003310</p> <p></p> <p>and here is the&nbsp; version with no print statements that causes the silent reset:</p> <p>00026678 &lt;evil_recursive&gt;:<br />&nbsp;&nbsp; 26678:&nbsp;&nbsp; &nbsp;b510&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;push&nbsp;&nbsp; &nbsp;{r4, lr}<br />&nbsp;&nbsp; 2667a:&nbsp;&nbsp; &nbsp;4a0b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r2, [pc, #44]&nbsp;&nbsp; &nbsp;; (266a8 &lt;evil_recursive+0x30&gt;)<br />&nbsp;&nbsp; 2667c:&nbsp;&nbsp; &nbsp;6813&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r3, [r2, #0]<br />&nbsp;&nbsp; 2667e:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 26680:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 26682:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 26684:&nbsp;&nbsp; &nbsp;6814&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r4, [r2, #0]<br />&nbsp;&nbsp; 26686:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 26688:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 2668a:&nbsp;&nbsp; &nbsp;4423&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r4<br />&nbsp;&nbsp; 2668c:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 2668e:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 26690:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 26692:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 26694:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 26696:&nbsp;&nbsp; &nbsp;6811&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r1, [r2, #0]<br />&nbsp;&nbsp; 26698:&nbsp;&nbsp; &nbsp;6812&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ldr&nbsp;&nbsp; &nbsp;r2, [r2, #0]<br />&nbsp;&nbsp; 2669a:&nbsp;&nbsp; &nbsp;440b&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r1<br />&nbsp;&nbsp; 2669c:&nbsp;&nbsp; &nbsp;4413&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r3, r2<br />&nbsp;&nbsp; 2669e:&nbsp;&nbsp; &nbsp;4418&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;add&nbsp;&nbsp; &nbsp;r0, r3<br />&nbsp;&nbsp; 266a0:&nbsp;&nbsp; &nbsp;f7ff ffea &nbsp;&nbsp; &nbsp;bl&nbsp;&nbsp; &nbsp;26678 &lt;evil_recursive&gt;<br />&nbsp;&nbsp; 266a4:&nbsp;&nbsp; &nbsp;bd10&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;pop&nbsp;&nbsp; &nbsp;{r4, pc}<br />&nbsp;&nbsp; 266a6:&nbsp;&nbsp; &nbsp;bf00&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;nop<br />&nbsp;&nbsp; 266a8:&nbsp;&nbsp; &nbsp;20003310 &nbsp;&nbsp; &nbsp;.word&nbsp;&nbsp; &nbsp;0x20003310</p> <p></p> <p></p><div style="clear:both;"></div>