title: ERROR 65 in ARM KEIL 5 (Permissions error)
body: <p>I'm relatively new in ARM Cortex M4 series micro-controller.
  When I'm trying to debug a simple project(blinky which easily just blinks a led on and off) using KEIL 5 simulator, I get an error like this:</p>
  
  <p><strong>* error 65: access violation at 0x400FE608 : no 'read' permission
  *</strong> error 65: access violation at 0x400FE608 : no 'write' permission</p>
  
  <p>I searched on internet for a solution, and I get this one:</p>
  
  <p><a href="http://www.keil.com/support/docs/814.htm" rel="nofollow">http://www.keil.com/support/docs/814.htm</a></p>
  
  <p>But actually it is not easy and not logical to mention all the addresses to which I want to access in my whole code like the method mentioned above.</p>
  
  <p>could anybody suggest something else for me please?</p>
  
  <p>(Actually I get this error with all projects which I intended to simulate so I can't simulate anything).</p>
  
  <p>Here is the simple code which I have been using:</p>
  
  <pre><code>#define GCGPIOR (*((int*)0x400FE608))
  int main(void) 
  { 
  GCGPIOR |= 0x20; 
  return 0; 
  }
  </code></pre>
  
  <p>and I am using this mc: TM4C1294NCPDT</p>