title: ATMEL Studio adding own library
body: <p>I tried to add my USART library to my project but I am still failing to properly add it so it will be recognized.</p>
  
  <p>I created an USART.c and USART.h file, which I want to add. This is what I tried:</p>
  
  <p>1) Right Click on the Solution / Properties / Toolchain / Directories
  2) Adding the Path where I got these two files</p>
  
  <p>When I try to build the project, it did not work. I get the message <code>undefined reference to 'initUSART'</code>. </p>
  
  <p>How do I add my own libraries to projects then?</p>
  
  <p><a href="https://i.stack.imgur.com/bu80S.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bu80S.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/awmad.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/awmad.png" alt="enter image description here"></a></p>