https://devzone.nordicsemi.com/f/nordic-q-a/3328/spi-slave-rx-buffer-readHi, I&#39;m using the nRF51822 and pCA10001 as SPI slave. For reasons beyond my control I have to read the Rx Buffer before the CSN is released. Yes, I know I shouldn&#180;t do it this way, but I have no option (as far as I know). I have the shortest whileen-USTelligent Community 13Tue, 05 Aug 2014 10:59:38 GMThttps://devzone.nordicsemi.com/thread/12126?ContentTypeID=1Tue, 05 Aug 2014 10:59:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c642fffb-28c1-4b76-a478-1e94f91f8b1fH&#229;kan Wennerholm<p>Just an update on my struggle to read buffers while the DMA is there and writes. Declaring the Rx Buffer volatile made life a lot easier. This makes it possible to use all the optimization levels.</p><div style="clear:both;"></div>