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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 interrupt problem</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/18134/serial-interrupt-problem</link><description> Hi all, 
I am facing a problem while debugging the code. The following error is comming and it is jumping to disassembly 
Error message is 
*** 65: access voilation at 0X001B: no &amp;#39;execute/read&amp;#39; permission 
This location is Timer 1 interrupt routine.</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/111178?ContentTypeID=1</link><pubDate>Thu, 25 Nov 2004 03:10:51 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:68898a1e-a7bc-48d2-ae66-71fcb2e49018</guid><dc:creator>John Donaldson</dc:creator><description>&lt;p&gt;&amp;quot;The only reason you&amp;#39;ll get an Error 65 is if you enable an interrupt for which there is no defined vector, if you access memory which is not declared (by a variable), or if your program runs amuck and jumps to a location in memory where no program code is located.&amp;quot;&lt;br /&gt;
&lt;br /&gt;
That was my point, really. If you get the interrupt number wrong on the ISR definition but enable the interrupt you thought you&amp;#39;d defined an ISR for, when that interrupt fires the CPU vectors to a location that either has no code or the wrong code.&lt;br /&gt;
&lt;br /&gt;
I only mentioned this as I seem to remember this being the solution to similar questions on the forum. I have no personal experience of the error in question, and little experience using the debugger.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/129919?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 11:40:07 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:4071c92a-cf8d-475f-8d18-3395d78b6a9c</guid><dc:creator>Sarang  Patki</dc:creator><description>&lt;p&gt;Sorry but I ment the same. Timer 1 interrupt vector location.&lt;br /&gt;
Thanks anyway.&lt;br /&gt;
Hoping for this help in future also.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/122595?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 11:34:17 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:149f9f55-5dbc-41d7-9b4d-9e0de95b88ee</guid><dc:creator>Jon Ward</dc:creator><description>&lt;p&gt;&lt;i&gt;I think 0X01B is playing a vital role here. Which is a vector location for interrupt 1.&lt;/i&gt;&lt;br /&gt;
&lt;br /&gt;
Hmmmm.  It&amp;#39;s certainly an interrupt vector, but it isn&amp;#39;t for interrupt 1.&lt;br /&gt;
&lt;br /&gt;
Take a look at &lt;a href="http://www.keil.com/support/man/docs/c51/c51_le_interruptfuncs.htm"&gt;http://www.keil.com/support/man/docs/c51/c51_le_interruptfuncs.htm&lt;/a&gt;.&lt;br /&gt;
&lt;br /&gt;
&lt;b&gt;Jon&lt;/b&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/111179?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:58:29 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d7397bd2-2110-4269-bbd6-12a625801d8d</guid><dc:creator>Sarang  Patki</dc:creator><description>&lt;p&gt;Thanks John, I think 0X01B is playing a vital role here. Which is a vector location for interrupt 1.&lt;br /&gt;
Thanks, actually I was thinking in that way but soon gave up. And will not do it again. Thanks. I am trying it again and definately will get a solution.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/111170?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:49:51 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:45cfb0d7-91a6-4edd-b72d-181e8a614d6a</guid><dc:creator>Jon Ward</dc:creator><description>&lt;p&gt;&lt;i&gt;here is the full code, please tell me where am I wrong.&lt;/i&gt;&lt;br /&gt;
&lt;br /&gt;
You&amp;#39;re very close to figuring this out yourself.  If you give up now, you won&amp;#39;t learn anything from this little adventure and you&amp;#39;ll probably make the same mistake again.&lt;br /&gt;
&lt;br /&gt;
You first coment about the error 65 is going in the right direction.  Keep looking.&lt;br /&gt;
&lt;br /&gt;
&lt;b&gt;Jon&lt;/b&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/96741?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:46:28 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:a10ff45d-3caa-4399-8145-cb1289c6d59c</guid><dc:creator>Jon Ward</dc:creator><description>&lt;p&gt;&lt;i&gt;Isn&amp;#39;t specifying the wrong interrupt number in the ISR definition the usual cause of this?&lt;/i&gt;&lt;br /&gt;
&lt;br /&gt;
Nope.  Not the Error 65 from the debugger.&lt;br /&gt;
&lt;br /&gt;
When the debugger lolads your program, it automatically creates a MAP for all the segments in the program.&lt;br /&gt;
&lt;br /&gt;
When you write an interrupt service routine, the compiler creates a segment for the vector and a segment for the function code.&lt;br /&gt;
&lt;br /&gt;
The only reason you&amp;#39;ll get an Error 65 is if you enable an interrupt for which there is no defined vector, if you access memory which is not declared (by a variable), or if your program runs amuck and jumps to a location in memory where no program code is located.&lt;br /&gt;
&lt;br /&gt;
Now, if your program uses a buffer (or some external program) that is not declared as a program object (using XBYTE or something like that) you will receive this error and you&amp;#39;ll need to use the MAP command to tell the debugger that access to the memory is OK.&lt;br /&gt;
&lt;br /&gt;
&lt;b&gt;Jon&lt;/b&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/96746?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:46:02 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:4145687e-3d07-4881-a1d1-deecc52bf806</guid><dc:creator>Sarang  Patki</dc:creator><description>&lt;p&gt;&lt;a href="http://www.electro-tech-online.com/viewtopic.php?p=65736#65736" target="_blank"&gt;http://www.electro-tech-online.com/viewtopic.php?p=65736#65736&lt;/a&gt;&lt;br /&gt;
here is the full code, please tell me where am I wrong.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/87005?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:38:01 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:80037d70-c9f9-4732-ab68-b7d85b6324d1</guid><dc:creator>John Donaldson</dc:creator><description>&lt;p&gt;Isn&amp;#39;t specifying the wrong interrupt number in the ISR definition the usual cause of this?&lt;br /&gt;
&lt;br /&gt;
eg:&lt;br /&gt;
void Timer1(void) interrupt 4&lt;br /&gt;
&lt;br /&gt;
instead of:&lt;br /&gt;
void Timer1(void) interrupt 3&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: serial interrupt problem</title><link>https://community.arm.com/thread/43180?ContentTypeID=1</link><pubDate>Wed, 24 Nov 2004 10:30:23 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:5cd24f21-e6c9-44fa-b4ea-78b2ffeb73ee</guid><dc:creator>Jon Ward</dc:creator><description>&lt;p&gt;&lt;a href="http://www.keil.com/support/docs/814.htm"&gt;http://www.keil.com/support/docs/814.htm&lt;/a&gt;&lt;br /&gt;
&lt;br /&gt;
&lt;b&gt;Jon&lt;/b&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>