https://devzone.nordicsemi.com/f/nordic-q-a/5153/softdevice-hangs-with-big-spi-master-transfersAfter SD initialization and turning on advertising i have to send large amount of data via SPI continuously. SPI driver code initializes SPI module after SD init and advertising start. After few minutes of successful operation application execution suddenlyen-USTelligent Community 13Wed, 21 Jan 2015 14:37:47 GMThttps://devzone.nordicsemi.com/thread/18071?ContentTypeID=1Wed, 21 Jan 2015 14:37:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e50a5f7e-92c9-4666-9cb4-48ebdac99b0dSergey<p>Sorry guys! Problem resolved. It was just going to the sleep state on BLE_GAP_EVT_TIMEOUT event with sd_power_system_off() calling. It was not depend on SPI module. When advertise timer expired device went to the sleep state. We just set APP_ADV_TIMEOUT_IN_SECONDS to 0 and we temporarily removed any appearance of the sd_power_system_off() function from our code. Thanks for quick responses!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18070?ContentTypeID=1Mon, 19 Jan 2015 17:01:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5386ab0f-bb67-41c5-96cc-ebd7d268f485Stefan Birnir Sverrisson<p>Hi Sergey</p> <p>When debugging, make sure you have compiler optimization disabled.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18069?ContentTypeID=1Thu, 15 Jan 2015 16:25:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:88426ad1-fa17-444e-b0f0-461f13dafdb7Sergey<p>Good day, Stefan! nRFgo studio says QFAAG00 chip version. We are using nRF51 SDK v. 6.0.0</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18068?ContentTypeID=1Thu, 15 Jan 2015 15:40:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:194a91b8-4806-43b4-8624-e4033b7533cfStefan Birnir Sverrisson<p>I haven&#39;t heard of this problem before. Which nRF51822 revision do you have, i.e. what are the chip markings on your chip? Also, what SDK version are you using?</p><div style="clear:both;"></div>