https://devzone.nordicsemi.com/f/nordic-q-a/36018/spis-blocks-ble-applicationHi together, since quite some time I try to merge my BLE application with the SPIS functionalities from nRF52 SDK 12.3 example with softdevice S132. My application should receive 200 bytes per second as an SPI slave and forward it to a connected deviceen-USTelligent Community 13Tue, 03 Jul 2018 18:16:59 GMThttps://devzone.nordicsemi.com/thread/138832?ContentTypeID=1Tue, 03 Jul 2018 18:16:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:94f29134-1009-49f8-b007-68adcdb56c83Susheel Nuguru[quote user=""]<span>As soon as I use the function nrf_drv_spis_buffers_set () in my application, the BLE advertising is blocked and nothing happens anymore</span>.[/quote] <p>The CPU cannot halt in a running program, so if the application is not progressing at all, then it has to be looping somewhere. When you start the application in the debug mode, you can run the debugger for sometime and hit the pause button to see where the PC register is pointing to.&nbsp;&nbsp;</p> <p>&nbsp;</p><div style="clear:both;"></div>