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<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>boot by USART</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/34459/boot-by-usart</link><description> 
Hi, 

 
Is there any example code to boot a new firmware to the stm32L by
USART1? should the boot0 pin pulled high by external device during
the USART communication? 
 </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: boot by USART</title><link>https://community.arm.com/thread/82647?ContentTypeID=1</link><pubDate>Tue, 23 Jun 2015 05:29:16 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:82b20f75-2647-420e-abc6-f263e7400478</guid><dc:creator>hamed ad</dc:creator><description>&lt;p&gt;&lt;p&gt;
Thanks for the link. just I don&amp;#39;t know about the state of pin
Boot0. Should it be pulled high just for interrupting the MCU and
then pulled low? I am using another STM32 to download a new firmware.
The new MCU holds the control of Boot0 while communicating with
USART.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: boot by USART</title><link>https://community.arm.com/thread/63852?ContentTypeID=1</link><pubDate>Tue, 23 Jun 2015 04:18:52 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d7b960f3-55c5-4e07-84eb-041fd6daff24</guid><dc:creator>Westonsupermare Pier</dc:creator><description>&lt;p&gt;&lt;p&gt;
Review the documentation&lt;br /&gt;

&lt;a href="http://www.st.com/web/en/resource/technical/document/application_note/CD00264342.pdf"&gt;www.st.com/.../CD00264342.pdf&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Download the &amp;quot;Flash Loader Demonstrator&amp;quot; is has source code, or
you can just implement the protocol as described in the
documentation.&lt;/p&gt;

&lt;p&gt;
There are also open source examples, a quick Google might get you
started.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>