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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>RE: USB virtual comm</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/31190/re-usb-virtual-comm</link><description> 
Reply to a new post on the Read-Only thread, 
 http://www.keil.com/forum/21035/ 

 
 Ramesh goud 
&amp;gt; am working on IAR evalution board (LPC2148) for USB virtual com.
The sample code from keil is not working in this board. 

 
Did you really try it? </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/127948?ContentTypeID=1</link><pubDate>Sun, 06 Jan 2013 21:20:09 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:e477cf2e-28d7-40e2-ac56-519f5ed226ca</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
Dear Tsuneo, pls respond to my question, that drivers installation
of usb comport.&lt;/p&gt;

&lt;p&gt;
The problem is that.&lt;/p&gt;

&lt;p&gt;
The host detected the device and if drivers can be installed. If
you open the hyper terminal to work on the same com port, with out
disconnecting port if you reset the micro controller board, the host
is asking one more time to install the drivers for the same comport,
and after successful updates of drivers, it&amp;#39;s asking to reboot the
system for effective working of the com port.&lt;/p&gt;

&lt;p&gt;
So, my requirement is that without disconnecting the comport on
hyper terminal, if I reset the micro controller board, the host can
recognize the device and it should not ask for driver update.&lt;/p&gt;

&lt;p&gt;
kindly respond to this thread.&lt;/p&gt;

&lt;p&gt;
Thanking you....&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/127944?ContentTypeID=1</link><pubDate>Thu, 03 Jan 2013 23:09:31 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:0469d5b6-e6bc-4528-ad5f-2312b7aa1536</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
Dear Tsuneo, let me know how to overcome the last issue, i.e.
plugging and unplugging of USB cable.&lt;/p&gt;

&lt;p&gt;
What I mean to say that after resetting the board we need to
disconnet the comport before only. if not it&amp;#39;s asking once again the
drivers to update. after updating the driver for effective
functionality it&amp;#39;s asking to restart the PC.&lt;/p&gt;

&lt;p&gt;
pls let me know.....&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/127942?ContentTypeID=1</link><pubDate>Thu, 03 Jan 2013 21:39:12 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:05a5cbc9-99a0-4cce-972a-f09d7a9873f8</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
Hello, first step as you told that the pin for voltage changed to
pin 31.&lt;/p&gt;

&lt;p&gt;
then by downloading this hex file, it&amp;#39;s recognized the com in
device manager of PC. He had given a setup file(driver for host), in
that you must match PID&amp;amp;VID of your USB_DeviceDescriptor in
usbdesc.c&lt;/p&gt;

&lt;p&gt;
He had provided two virtual com ports, u can turn it into single
virtual com by changing the value of /* bNumInterfaces */ (0x02) to
0x01.&lt;/p&gt;

&lt;p&gt;
It&amp;#39;s better to change the class /* bInterfaceClass, */ to
USB_DEVICE_CLASS_COMMUNICATIONS&lt;/p&gt;

&lt;p&gt;
then it&amp;#39;s working fine now,&lt;br /&gt;
in my case my USB detected COM46, COM1(UART0) can communicate each.
i.e what ever am sending the data from UARTO, am retriving on
COM46(USB Buffer)&lt;/p&gt;

&lt;p&gt;
here I noticied that if you want reset the board, first you&amp;#39;ve
disconnect usb com port. then only you have to reset the board,
otherwise once again it&amp;#39;s asking for the host driver..&lt;/p&gt;

&lt;p&gt;
That&amp;#39;s all from my end....&lt;br /&gt;
HAPPY NEW YEAR.....:)&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/119918?ContentTypeID=1</link><pubDate>Thu, 03 Jan 2013 06:24:35 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:43c79f31-be27-4519-b0b9-33105eb647a4</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
So what was the problem? How did you resolve it?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/106718?ContentTypeID=1</link><pubDate>Thu, 03 Jan 2013 03:18:44 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:06f8fdca-dbe6-4bd3-be08-3e5dad9d40fd</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
hello Tsuneo, it&amp;#39;s working fine now. thanks 4 ur supporting in
working on virtual com port&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/106717?ContentTypeID=1</link><pubDate>Sun, 30 Dec 2012 21:46:58 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:46b14554-6a6f-4640-bf90-35c529190507</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
Hello Tsuneo, the board is detecting the com port, and the driver
file is not supporting which he had provided and it&amp;#39;s showing two
comports there.How...!&lt;/p&gt;

&lt;p&gt;
pls let me know what&amp;#39;s happening here&lt;/p&gt;

&lt;p&gt;
Thanking U&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/106716?ContentTypeID=1</link><pubDate>Fri, 28 Dec 2012 22:12:37 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:344879a4-6c27-4ec6-814d-b1cfe0c0c771</guid><dc:creator>Ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;a target="_blank" href="http://www.nxp.com/search?q=usb+virtual+com+for+lpc2148&amp;amp;type=keyword&amp;amp;rows=10"&gt;www.nxp.com/search&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Dear Tsuneo,&lt;/p&gt;

&lt;p&gt;
here am sharing the link and it contains the source code for
LPC2148 USB Virtual Com. Please go through this and let me know if
it&amp;#39;s suitsble for IAR board or not, if it&amp;#39;s, then tel me what are the
changes to be needed.&lt;/p&gt;

&lt;p&gt;
Thank U...&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/92211?ContentTypeID=1</link><pubDate>Fri, 28 Dec 2012 08:01:41 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:3906a753-37c4-41df-abd8-fb07fb0692a7</guid><dc:creator>Chinzei Tsuneo</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;&amp;gt; The sample code from keil is not working in this
board.&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Err.. We may be talking about different examples.&lt;br /&gt;
What is the &amp;quot;sample code&amp;quot; are you working on?&lt;br /&gt;
Show the exact link or folder location.&lt;/p&gt;

&lt;p&gt;
Tsuneo&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: RE: USB virtual comm</title><link>https://community.arm.com/thread/61508?ContentTypeID=1</link><pubDate>Fri, 28 Dec 2012 05:01:18 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:db75d51e-0a39-4247-afbd-6b43584d39ef</guid><dc:creator>ramesh goud</dc:creator><description>&lt;p&gt;&lt;p&gt;
Hello Tsuneo, i&amp;#39;ve enable the pin P0.31, now it&amp;#39;s showing that
unknown device with that code, i hope the enumeration process is not
working properly,&lt;/p&gt;

&lt;p&gt;
The example code that was given by the IAR systems is working
fine, it&amp;#39;s detecting the COM over there. And he had provided the host
driver to work.&lt;/p&gt;

&lt;p&gt;
Tel me some suggestion...&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>