http://forums.leaflabs.com/topic.php?id=74329 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:21:32 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=74329#post-105379 Sun, 11 May 2014 20:32:59 +0000 jbaker 105379@http://forums.leaflabs.com/ <p>I did get code running with the JTAG target and no bootloader, but I'm not sure how to verify the frequency of SYSCLK from there. </p> http://forums.leaflabs.com/topic.php?id=74329#post-105377 Sun, 11 May 2014 14:27:51 +0000 jbaker 105377@http://forums.leaflabs.com/ <p>I have a board with an F103CBT6 that I want to run the Maple bootloader on. I loaded the bootloader .bin file with an ST-LINK/v2 and that worked but the IDE wasn't seeing the board when I tried to upload via USB. I then tried loading the .bin out of the temp directory and that didn't work either (crystal not oscillating and code not running as in <a href="http://forums.leaflabs.com/topic.php?id=74271)" rel="nofollow">http://forums.leaflabs.com/topic.php?id=74271)</a>. I didn't happen to scope the crystal with the bootloader running.</p> <p>At this point, I realized that I made the mistake of using a 12MHz crystal instead of the 8MHz used on the Maple proper. My current theory is that it doesn't like having PLLMUL set to 9. How do I go about changing the configuration for the correct PLLMUL value to get a 72MHz clock? I assume I need to add a new board definition etc but I can't find where it sets PLLMUL. </p>