DFU issue on custom boardhttps://devzone.nordicsemi.com/f/nordic-q-a/17459/dfu-issue-on-custom-boardHello, I am using a custom board and my setup looks like this: nrf51 chip 16KB RAM 256KB of Flash external crystal of 32MHz SDK12.1 Compiling on Linux using GCC I am trying to port the bootloader_secure example to the customen-USTelligent Community 13Mon, 07 Nov 2016 15:41:27 GMTRE: DFU issue on custom boardhttps://devzone.nordicsemi.com/thread/67099?ContentTypeID=1Mon, 07 Nov 2016 15:41:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4801d185-2f95-4779-bc01-5ab442c281f0FormerMember<p>I have updated the answer with proper values. Let me know if it doesn&#39;t work.</p><div style="clear:both;"></div>RE: DFU issue on custom boardhttps://devzone.nordicsemi.com/thread/67098?ContentTypeID=1Fri, 04 Nov 2016 12:33:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f655a0f3-9814-4b64-bfbf-0ba3e03cd014FormerMember<p>I forgot about the 16 kB RAM, so my suggestion will not work. I will have to look further into it.</p><div style="clear:both;"></div>RE: DFU issue on custom boardhttps://devzone.nordicsemi.com/thread/67097?ContentTypeID=1Fri, 04 Nov 2016 11:49:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6adf7e7-b887-4c4a-8af8-841a92aca4a2Tanasis!<p>Thx for the reply Kristin. I will try this hopefully in the afternoon. But one question: Since I have 16KB of RAM, them this RAM has address region of 0x2000 0000 - 0x2000 4000 correct? So, if I adjust the linker script for the length of 0x5A20, would be - at least in theory - incorrect? Or what is the idea here? Thx!!</p><div style="clear:both;"></div>RE: DFU issue on custom boardhttps://devzone.nordicsemi.com/thread/67096?ContentTypeID=1Fri, 04 Nov 2016 11:42:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52fc483c-254b-4f6c-83ad-f89c97f6ffa0FormerMember<p>From the debug output, it looks like the problem is related to the amount of RAM allocated for the softdevice.</p> <p><strong>Update 07.11.2016:</strong> The RAM settings for the 16 kB nRF51, optimization level 3 can set to the following:</p> <pre><code>RAM start: 0x200025E0 RAM size/length: 0x1A20 </code></pre> <p><strong>04.11.2016:</strong> The output says:</p> <pre><code> (softdevice_enable) ram size should be adjusted to 0x5A20 </code></pre> <p>It means that the length of RAM in the linker file should be adjusted to at least 0x5A20:</p> <pre><code>RAM (rwx) : ORIGIN = 0x20002C00, LENGTH = 0x5A20 </code></pre> <p>Let me know if it still doesn&#39;t work after changing the size/length.</p><div style="clear:both;"></div>