Hard Fault on SD functions not in mainhttps://devzone.nordicsemi.com/f/nordic-q-a/14053/hard-fault-on-sd-functions-not-in-mainHello, i have a problem with the PCA10040. I try to set up a ANT Transmit Channel. If &quot;ant_channel_init&quot; is called from main everything works fine. But if it&#39;s called from other c file the Softdevice call &quot;sd_ant_channel_assign&quot; end in hardfaulten-USTelligent Community 13Tue, 24 May 2016 09:42:18 GMTRE: Hard Fault on SD functions not in mainhttps://devzone.nordicsemi.com/thread/53739?ContentTypeID=1Tue, 24 May 2016 09:42:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:adaefc3d-76ac-4b31-ac22-d2126e9cc18aRK<p>ok usual rules apply, the context you call it from has to be lower priority than the SVC call priority (I don&#39;t know what that is for ANT) else it hardfaults. So this should be pretty easy to fix !</p><div style="clear:both;"></div>RE: Hard Fault on SD functions not in mainhttps://devzone.nordicsemi.com/thread/53738?ContentTypeID=1Tue, 24 May 2016 09:41:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3638452e-4dc4-4917-b5b4-8771821b85e0andi<p>Yes Thanks, Sry my fault i changed some parts of my code and didn&#39;t see it was called from SD Interrupt.</p><div style="clear:both;"></div>RE: Hard Fault on SD functions not in mainhttps://devzone.nordicsemi.com/thread/53737?ContentTypeID=1Tue, 24 May 2016 09:33:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e012260-0b67-4f0f-a55b-94a3cb040e9bRK<p>are you calling these functions from an interrupt handler?</p><div style="clear:both;"></div>