Memory Allocation and Heap Size nRF52840https://devzone.nordicsemi.com/f/nordic-q-a/64927/memory-allocation-and-heap-size-nrf52840Hi! I&#39;m working with an nRF52840 SOC using SDK 17 and Keil. When I try to allocate memory to a structure of size 8388 bytes, malloc always returns 0. I&#39;ve set __HEAP_SIZE=16384 so it shouldn&#39;t be the problem. I&#39;ve also tried and configured the memoryen-USTelligent Community 13Wed, 19 Aug 2020 13:53:44 GMTRE: Memory Allocation and Heap Size nRF52840https://devzone.nordicsemi.com/thread/265354?ContentTypeID=1Wed, 19 Aug 2020 13:53:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e60e890e-cf6c-459a-98c6-4356212497a9Vidar Berg<p>Glad to hear that it works now. Yes, we could have made this more obvious by not duplicating the same symbol under the C/C++ tab. </p><div style="clear:both;"></div>RE: Memory Allocation and Heap Size nRF52840https://devzone.nordicsemi.com/thread/265350?ContentTypeID=1Wed, 19 Aug 2020 13:48:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:25939e9e-ac92-4c41-bfc8-636a07ea689cIstvanS<p>Thanks, it worked! I changed the heap size under the &quot;C/C++&quot; tab, which didn&#39;t work. Good to know you have to change it under &quot;Asm&quot;.</p><div style="clear:both;"></div>RE: Memory Allocation and Heap Size nRF52840https://devzone.nordicsemi.com/thread/265340?ContentTypeID=1Wed, 19 Aug 2020 13:20:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:360deede-27c7-4382-949f-7d16d6eb9c46Vidar Berg<p>Hi,</p> <p>Please make sure the *asm* symbol is updated, then verify that this setting gets reflected in the *.map file as shown below.</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-acaa85235cf940b883e5753dc1b8a99b/pastedimage1597843200562v1.png" /></p><div style="clear:both;"></div>