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<title>SCU Robotic Systems Laboratory - Installing Procyon AVRlib</title>
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<h1>Installing Procyon AVRlib</h1>
<h2>Sections</h2>
<ol>
<li><a href="#1">Overview</a></li>
<li><a href="#2">Downloading</a></li>
<li><a href="#3">Installing</a></li>
<li><a href="#4">Testing</a></li>
</ol>
<center>Written by Pascal Stang | Updated:
<!--#echo var="LAST_MODIFIED" -->
</center>
<hr>
<h3><a name="1"></a>1. Overview</h3>
<blockquote>
<p>Procyon AVRlib is an open-source collection of C-language function libraries
for the Atmel AVR series processors. The goal of AVRlib is to provide the
programmer with a code base which performs the most often needed tasks in
embedded system programming. Hopefully, this will allow the programmer to
focus on high-level operation of their code rather than get bogged down in
the details of low-level code.</p>
<p>In short, AVRlib is a bunch of functions that do things commonly needed in
embedded systems. Despite the learning curve of getting started, for most
projects, using AVRlib will shorten the time spent programming and/or improve
the quality or functionality of the final product.</p>
<p>AVRlib functions are available for a wide variety of tasks and purposes.
In general, AVRlib tries to address the following kinds of needs:</p>
<ul>
<li>Functions which control or interface to AVR processor hardware (like timers,
uarts, the a2d converter, etc)</li>
<li>Functions which interface to or drive devices often used in embedded systems
(like LCDs, hard disks, gps units, etc)</li>
<li>Functions which create higher-level functionality from processor resources
(like pulse generation, software uarts, software i2c bus, etc)</li>
</ul>
<p>For a partial list of currently available function libraries see the <a href="index.html">AVRlib
Main Page</a>.</p>
</blockquote>
<h3><a name="2"></a>2. Downloading</h3>
<blockquote>
<p>AVRlib is currently available as individual files, or a complete zip file.
Both are available from the <a href="index.html">AVRlib Main Page</a>.</p>
<p><strong><font color="#FF0000">Downloading the complete <a href="avrlib.zip">avrlib.zip</a>
file is highly recommended as documentation and code examples are included
in the zip.</font></strong></p>
</blockquote>
<h3><a name="3"></a>3. Installing</h3>
<blockquote>
<p><strong><font color="#FF0000">This installation for AVRlib assumes you have
already installed the AVR-GCC or WinAVR compiler and successfully tested it.</font></strong></p>
<p>You can install AVRlib anywhere you like, however, it's suggested that you
install it in a directory alongside your own AVR code projects. Create or
choose a top-level directory to hold both AVRlib and the project folders which
you will create to hold the code for each individual project you work on.
The directory you choose should not contain spaces in its name or path. Some
examples are: </p>
<pre>
c:\Code\AVR <font color="#009900">(GOOD)</font>
c:\My Code <font color="#FF0000">(NOT RECOMMENDED - HAS SPACES IN PATH)</font>
</pre>
<p>From the download step you should have an <strong>avrlib.zip</strong> file.
Unzip this file into the code directory you chose above. Be sure to preserve
the internal directory structure of the zip file when you unzip it. Afterward,
you can delete avrlib.zip but you may want to keep it for later re-installs
or as a backup.</p>
<p>You should now have an <strong>avrlib</strong> directory where you installed
AVRlib. If you have some time, get familiar with what's inside some of the
directories. Your directories should look something like this:</p>
<pre>
c:\Code\AVR\avrlib <font color="#0000FF"><-- AVRlib header and code files</font>
c:\Code\AVR\avrlib\conf <font color="#0000FF"><-- AVRlib template configuration files</font>
c:\Code\AVR\avrlib\docs <font color="#0000FF"><-- AVRlib documentation</font>
c:\Code\AVR\avrlib\examples <font color="#0000FF"><-- AVRlib example applications</font>
c:\Code\AVR\avrlib\make <font color="#0000FF"><-- AVRlib makefile include (avrproj_make file in here)</font></pre>
<p>Finally, you need to create an environment variable <strong>AVRLIB</strong>
which points to the directory where you "installed" or unzipped
the AVRlib files so the compiler can find them. An example might be:</p>
<pre>AVRLIB = c:/code/avr/avrlib <font color="#0000FF"><-- change to actual AVRlib install directory</font>
</pre>
<p>If you are unsure how to set environment variables on your system, look at
the WinAVR/AVR-GCC installation guide elsewhere on this site or consult the
web.</p>
<p>AVRlib installation is complete!</p>
</blockquote>
<h3><a name="4"></a>4. Testing</h3>
<blockquote>
<p>There are a few simple steps you can take to verify that AVRlib is properly
installed:<br>
<font color="#FF0000"><strong>(This assumes you have previously installed
and tested the AVR-GCC or WinAVR compiler)</strong></font></p>
<ul>
<li>Open a Command Prompt (find it in your <strong>Start Menu</strong> or
select <strong>Run</strong>, and run <strong>cmd.exe</strong>) </li>
<li>Change directories to the location where you installed AVRlib. For example:<br>
<strong>cd c:\Code\AVR\AVRlib</strong></li>
<li>Go into the examples directory. <strong>cd examples</strong></li>
<li>Pick an example to try compiling such as rprintf and change to that directory.
<strong>cd rprintf</strong></li>
<li>Type <strong>make clean</strong> at the prompt</li>
<li>Type <strong>make</strong></li>
<li>If your output looked like this then you just compiled your first AVRlib
program:
<pre>
C:\Code\AVR\avrlib\examples\rprintf>make
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=rpri
ntftest.lst -mmcu=atmega323 -I. rprintftest.c -o rprintftest.o
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=c:/c
ode/avr/avrlib/buffer.lst -mmcu=atmega323 -I. c:/code/avr/avrlib/buffer.c -o c:/
code/avr/avrlib/buffer.o
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=c:/c
ode/avr/avrlib/uart.lst -mmcu=atmega323 -I. c:/code/avr/avrlib/uart.c -o c:/code
/avr/avrlib/uart.o
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=c:/c
ode/avr/avrlib/rprintf.lst -mmcu=atmega323 -I. c:/code/avr/avrlib/rprintf.c -o c
:/code/avr/avrlib/rprintf.o
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=c:/c
ode/avr/avrlib/timer.lst -mmcu=atmega323 -I. c:/code/avr/avrlib/timer.c -o c:/co
de/avr/avrlib/timer.o
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -Ic:/code/avr/avrlib -Wa,-ahlms=c:/c
ode/avr/avrlib/vt100.lst -mmcu=atmega323 -I. c:/code/avr/avrlib/vt100.c -o c:/co
de/avr/avrlib/vt100.o
avr-gcc c:/code/avr/avrlib/buffer.o c:/code/avr/avrlib/uart.o c:/code/avr/avrli
b/rprintf.o c:/code/avr/avrlib/timer.o c:/code/avr/avrlib/vt100.o rprintftest.o
-Wl,-Map=rprintftest.map,--cref -mmcu=atmega323 -o rprintftest.elf
avr-objcopy -O ihex -R .eeprom rprintftest.elf rprintftest.hex
avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section
-lma .eeprom=0 -O ihex rprintftest.elf rprintftest.eep
avr-size rprintftest.elf
text data bss dec hex filename
9596 0 192 9788 263c rprintftest.elf
Errors: none
rm c:/code/avr/avrlib/vt100.o c:/code/avr/avrlib/rprintf.o c:/code/avr/avrlib/ua
rt.o c:/code/avr/avrlib/timer.o c:/code/avr/avrlib/buffer.o
C:\Code\AVR\avrlib\examples\rprintf>
</pre>
</li>
<strong>AVRlib is ready to use!</strong>
</ul>
</blockquote>
<hr>
<center>Written by Pascal Stang | Updated:
<!--#echo var="LAST_MODIFIED" -->
</center>
</body>
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