http://forums.leaflabs.com/topic.php?id=9977 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:16:09 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=9977#post-21780 Tue, 25 Dec 2012 22:44:40 +0000 feurig 21780@http://forums.leaflabs.com/ <p>Nice!! I will have to test that out! </p> http://forums.leaflabs.com/topic.php?id=9977#post-21778 Tue, 25 Dec 2012 14:27:29 +0000 ventosus 21778@http://forums.leaflabs.com/ <p>While searching for an easy way to create a per-board unique locally administered MAC address I've found out that each MCU has a unique ID (which can be quite handy if you need to tell your boards apart).</p> <p>For the whole STM32F10xxx family, this unique 96-bit ID is located in the system memory area in the flash memory at 0x1FFFF7E8.</p> <p>For byte-wise access I use the following code</p> <p><code><br /> // byte-wise access from UID_BASE[0] - UID_BASE[11]<br /> #define UID_BASE ((const uint8_t *)0x1FFFF7E8)</p> <p>// create a MAC address based on the lower 48 bits<br /> uint8_t uid_mac [6] = {<br /> (UID_BASE[5] | 0x02) &amp; 0xfe, // locally administered unicast: 0bxxxxxx10<br /> UID_BASE[4],<br /> UID_BASE[3],<br /> UID_BASE[2],<br /> UID_BASE[1],<br /> UID_BASE[0]<br /> };<br /> </code> </p>