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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>Serial communication help</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/37208/serial-communication-help</link><description> 
i am using keil MCBX51 board 
my project requires 2 serial port 
i am using ext serial port for monitor and i am left with int serial
port only 
but i want 2 serial port 

 
what to do 
plz.. help me friends 

 
how can i acess ext serial port, how</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: Serial communication help</title><link>https://community.arm.com/thread/47983?ContentTypeID=1</link><pubDate>Sun, 25 Mar 2007 01:12:58 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:e4540f57-f444-44b9-81de-495897e3894f</guid><dc:creator>sandeep kl</dc:creator><description>&lt;p&gt;&lt;p&gt;
thanks friends&lt;/p&gt;

&lt;p&gt;
in my project i hav to receive a data frame from serial port and
modify it suitably, then send it over serial port.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Serial communication help</title><link>https://community.arm.com/thread/99066?ContentTypeID=1</link><pubDate>Sat, 24 Mar 2007 10:54:02 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:30a09ab4-e221-405d-83bc-99b5a2938d26</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;&amp;quot;those relate to the &amp;#39;51&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
The question arose in an 8051 context, but the answer is generic -
here&amp;#39;s the list:&lt;/p&gt;

&lt;p&gt;
- get a 2-UART derivative plus some of the solutions below&lt;br /&gt;
- switch the 1 internal UART (if data are not simultaneous)&lt;br /&gt;
- softUART if not too high speed and you know exactly what you do&lt;br /&gt;
- use parallel interfaced external UART&lt;br /&gt;
- use SPI/I2C interfaced external UART&lt;br /&gt;
- use a &amp;quot;slave micro&amp;quot; interfaced via I2C/SPI&lt;/p&gt;

&lt;p&gt;
All of those could be applied generically to any processor.&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;the MCBX51 ... is a 251 board&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
No, it&amp;#39;s a generic board, supporting both:&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;The Keil MCBx51 Evaluation Board works with all 44-pin 8051
and 251 devices ... allows you to investigate the capabilities of the
8051 and 251&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
&lt;a href="http://www.keil.com/boards/"&gt;http://www.keil.com/boards/&lt;/a&gt;&lt;br /&gt;
&lt;a href="http://www.keil.com/mcbx51/"&gt;http://www.keil.com/mcbx51/&lt;/a&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Serial communication help</title><link>https://community.arm.com/thread/88250?ContentTypeID=1</link><pubDate>Sat, 24 Mar 2007 08:54:50 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:baee9fd5-7924-4706-bfcc-aa2b3dc44245</guid><dc:creator>erik  malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
those relate to the &amp;#39;51 (which the OP erronesously refer to) I had
a peek at the MCBX51 and it is a &lt;b&gt;251&lt;/b&gt; board. Since I rejected
this pittiful attempt at a &amp;quot;16 bit &amp;#39;51&amp;quot; long ago (just have a look at
the XA), I do not recall if it has two UARTs, but it may.&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Serial communication help</title><link>https://community.arm.com/thread/50557?ContentTypeID=1</link><pubDate>Sat, 24 Mar 2007 08:31:58 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:c4782ca4-f21a-4493-a521-aacc46a231b6</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;a target="_blank" href="http://www.8052.com/forum/read.phtml?id=129629"&gt;&amp;quot; href=
&amp;quot;http://www.8052.com/forum/read.phtml?id=129763&amp;quot;&amp;gt;&lt;a href="http://www.8052.com/forum/read.phtml?id=129763"&gt;www.8052.com/.../read.phtml&lt;/a&gt;&lt;/a&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>