https://devzone.nordicsemi.com/f/nordic-q-a/8644/spi_master-causing-hard_faultSo I&#39;m using the spi_master.c from SDK 6.1 to communicate with an LCD driver. I&#39;m using an nrf51822 with s110 softdevice. My system has been sporadically hardfaulting on me. I&#39;ve traced the hard_fault to the spi_master.c driver. Specifically the functionen-USTelligent Community 13Wed, 12 Aug 2015 07:35:54 GMThttps://devzone.nordicsemi.com/thread/31630?ContentTypeID=1Wed, 12 Aug 2015 07:35:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eb28b609-f066-4721-9d7e-a4e075f9d397Hung Bui<p>I assume you used example from pack system ? You can try to update the packs to latest version. But I would suggest you to use the <a href="http://developer.nordicsemi.com/nRF51_SDK/nRF51_SDK_v9.x.x/">.zip SDK package</a> instead of the pack one.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31629?ContentTypeID=1Tue, 11 Aug 2015 13:58:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:be5fbe28-d34c-452a-b7dc-a2eae7d63748nsnyder<p>Yes it did indeed work on the other computer. The file Keil_v5 on the one computer contained newer supporting software than the Keil_v5 file on the other computer. The functioning computer contained an older version of the MDK and other supporting software.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31628?ContentTypeID=1Tue, 11 Aug 2015 11:15:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9da1178d-f997-4c98-9633-47211fbcdde1Hung Bui<p>@nsnyder: It sounds strange. Could you confirm that the issue fixed when you moved to another PC ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31627?ContentTypeID=1Mon, 10 Aug 2015 17:40:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:10daf456-6b85-4ee9-9301-a5335334153ensnyder<p>So i had switched computers and as it turns out the compiler control string was a little be different in Keil on the new computer I was using.</p><div style="clear:both;"></div>