http://forums.leaflabs.com/topic.php?id=676 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:17:21 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=676#post-3935 Thu, 17 Mar 2011 11:06:28 +0000 poslathian 3935@http://forums.leaflabs.com/ <p>mBed style. I didnt realize there was a good example of this in the public domain. Thanks! </p> http://forums.leaflabs.com/topic.php?id=676#post-3919 Wed, 16 Mar 2011 22:26:56 +0000 anton 3919@http://forums.leaflabs.com/ <p>There is another interesting opportunity.<br /> This program <a href="http://easyelectronics.ru/img/ARM_kurs/Flashing/rtx_f103_boot.zip" rel="nofollow">http://easyelectronics.ru/img/ARM_kurs/Flashing/rtx_f103_boot.zip</a><br /> generates bootloader which presents memory of stm32f103 as disk device with one file<br /> firmware.bin. You just copy your file over.<br /> It loads binary from 0x8002000 address, so you need to change linker script. BOOT1 pin used to swich from botloader to user code mode. 0 - bootloader, 1 - user. </p> http://forums.leaflabs.com/topic.php?id=676#post-3917 Wed, 16 Mar 2011 18:44:17 +0000 bryank 3917@http://forums.leaflabs.com/ <p>Quick question about the possibility of avoiding that circuit. There is an STM32 discovery thread that is talking about using that development board with the Maple library and member geoffreymbrown says the following:</p> <p>"there's no soft disconnect circuitry so it isn't feasible<br /> to switch between dfu and serial modes under software control. I modified the bootloader to go directly to user code (without initializing the usb connection for dfu)<br /> if the button is not pressed."</p> <p>If I could get a hold of this modified bootloader could I to upload sketches without this circuit? </p> http://forums.leaflabs.com/topic.php?id=676#post-3868 Sat, 12 Mar 2011 04:13:45 +0000 anton 3868@http://forums.leaflabs.com/ <p>The circuit simulates USB cable disconnection. After it host OS changes device driver.<br /> <a href="http://leaflabs.com/docs/bootloader.html" rel="nofollow">http://leaflabs.com/docs/bootloader.html</a> </p> http://forums.leaflabs.com/topic.php?id=676#post-3863 Fri, 11 Mar 2011 17:48:56 +0000 bryank 3863@http://forums.leaflabs.com/ <p>Thanks, especially for the drawing! Ill compare your drawing with the schematic of the Maple tonight to see what I missed. If you care to explain the purpose of this circuit I would definitely listen. Appreciate it! </p> http://forums.leaflabs.com/topic.php?id=676#post-3845 Wed, 09 Mar 2011 00:56:31 +0000 x893 3845@http://forums.leaflabs.com/ <p>I think 22pF - not a 22nF </p> http://forums.leaflabs.com/topic.php?id=676#post-3844 Wed, 09 Mar 2011 00:07:18 +0000 anton 3844@http://forums.leaflabs.com/ <p>To make it functional you should add USB_P divider and a couple of transistors from DISK pin to USB D+. Or it can be one pnp transistor: <a href="http://easyelectronics.ru/img/ARM_kurs/Flashing/stm_32_usb.jpg" rel="nofollow">http://easyelectronics.ru/img/ARM_kurs/Flashing/stm_32_usb.jpg</a> </p> http://forums.leaflabs.com/topic.php?id=676#post-3830 Sun, 06 Mar 2011 20:09:44 +0000 bryank 3830@http://forums.leaflabs.com/ <p>Nevermind, found a populated board on Ebay and the pictures of it answer all my questions. Here it is if anyone is interested</p> <p>For auction<br /> <a href="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&amp;item=180634588904&amp;fromMakeTrack=true&amp;ssPageName=VIP:watchlink:top:en" rel="nofollow">http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&amp;item=180634588904&amp;fromMakeTrack=true&amp;ssPageName=VIP:watchlink:top:en</a></p> <p>Buy it now<br /> <a href="http://cgi.ebay.com/ARM-Cortex-M3-STM32F103RBT6-MINI-Development-Board-/170573639938?pt=LH_DefaultDomain_0&amp;hash=item27b6fb3102" rel="nofollow">http://cgi.ebay.com/ARM-Cortex-M3-STM32F103RBT6-MINI-Development-Board-/170573639938?pt=LH_DefaultDomain_0&amp;hash=item27b6fb3102</a> </p> http://forums.leaflabs.com/topic.php?id=676#post-3826 Sun, 06 Mar 2011 13:06:26 +0000 bryank 3826@http://forums.leaflabs.com/ <p>I have a few STM32F103RB chips and have 3 of these breakout boards coming this week. </p> <p><a href="http://iteadstudio.com/store/index.php?main_page=product_info&amp;cPath=19_21&amp;products_id=271" rel="nofollow">http://iteadstudio.com/store/index.php?main_page=product_info&amp;cPath=19_21&amp;products_id=271</a></p> <p>By omitting a few of the components from both the Maple schematic and the breakout board I believe I could have a fully functional board that could be programmed with the Maple IDE. I have taken the 2 .PDF schematics and noted which components I foresee needing to omit, can anyone look these over and give me the thumbs up or down before I spend a few hours populating the board? Thanks!</p> <p>Maple schematic with omitted components<br /> <a href="http://www.woofiles.com/dl-231029-DtqU9CDz-MapleR5Schematicwithomittedcomponents.pdf" rel="nofollow">http://www.woofiles.com/dl-231029-DtqU9CDz-MapleR5Schematicwithomittedcomponents.pdf</a></p> <p>Breakout board schematic with omitted components<br /> <a href="http://www.woofiles.com/dl-231031-PD8JAl9R-STM32F103RBBreakoutSchematicwithomittedcomponents.pdf" rel="nofollow">http://www.woofiles.com/dl-231031-PD8JAl9R-STM32F103RBBreakoutSchematicwithomittedcomponents.pdf</a> </p>