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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>uart interrupt</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/32640/uart-interrupt</link><description> 
hello dear all, 
i am working on a project about uart interrupt. I want to send a hex
file or number and show that on my LCD but i can&amp;#39;t show any thing on
my LCD i dont know whats my problem. i write my code, main part. i
dont have example for uart</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: uart interrupt</title><link>https://community.arm.com/thread/69253?ContentTypeID=1</link><pubDate>Sun, 21 Jun 2015 03:59:44 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:2590f7a0-6ab3-4477-81cb-54e5700037a2</guid><dc:creator>ImPer Westermark</dc:creator><description>&lt;p&gt;&lt;p&gt;
If you spent a couple of minutes googling for UART ISR code, you
would notice that a UART ISR isn&amp;#39;t expected to busy-loop until a
fixed number of characters has been received. It&amp;#39;s instead expected
to get activated when the UART wants to be serviced - and return as
soon as the UART has no more need for service. Then if the UART
recevies more data, the ISR can be activated again.&lt;/p&gt;

&lt;p&gt;
If you are going to busy-loop, as your ISR does - then why not
just busy-loop in the main code loop? Because a busy-loop within the
ISR will kill all chances of getting lightning-quick responses.&lt;/p&gt;

&lt;p&gt;
Another thing - when posting code there are clear instructions how
to tag the code to make the post readable. Careful reading of
instructions is a vital part of software development.&lt;/p&gt;
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