https://devzone.nordicsemi.com/f/nordic-q-a/14375/how-to-add-new-files-to-buildI want to use master spi mode ,but when I build the file,it is always error.I operate like this ,First I open the project in ble_peripheral\ble_app_hrs\pca10040\s132\arm5_no_packs,and add nrf_drv_spi.c file in the nRF_Drivers group, then in the main.cen-USTelligent Community 13Wed, 08 Jun 2016 07:23:56 GMThttps://devzone.nordicsemi.com/thread/54883?ContentTypeID=1Wed, 08 Jun 2016 07:23:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d7054cf-1204-45ae-9ddb-0b0e6afc4d2bawneil<p>Why do you think that the problem is with adding a file?</p> <p><strong>Read the error message!</strong></p> <p>It is telling you that it has hit a <strong>#error</strong> directive - so go and look at that line, and see what condition(s) would cause that. Then fix it!</p> <p>In fact, it tells you that the reason is, &quot;&quot;Wrong configuration&quot;; so look at the code there to see what is wrong with your configuration (what condition triggers the #error) - and correct it!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54882?ContentTypeID=1Wed, 08 Jun 2016 06:50:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1da9b741-d158-4fe6-bc34-ee99bcfa441cRichieJH<p>Is 56 reference to a line number?</p><div style="clear:both;"></div>