2010 ICASSP Lab 1 Wiring and Running the Beagle - Revision history

Yoder: Removed category

2011-04-28T13:31:55Z

Removed category

Yoder: moved ECE597 ICASSP Lab 1 Wiring and Running the Beagle to 2010 ICASSP Lab 1 Wiring and Running the Beagle

2011-04-28T13:31:05Z

moved ECE597 ICASSP Lab 1 Wiring and Running the Beagle to 2010 ICASSP Lab 1 Wiring and Running the Beagle

Yoder: Added workshop category

2011-01-31T16:35:22Z

Added workshop category

Batydm: I believe this is the intended meaning (Wire your beagle as shown)

2010-03-14T07:18:31Z

I believe this is the intended meaning (Wire your beagle as shown)

Morasique: fixed

 and  tags


2010-03-13T20:32:11Z
fixed <pre> and <code> tags

				
				
				
				
			
			← Older revision
			Revision as of 20:32, 13 March 2010
			
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  ls /sys   ls /sys
  </pre>   </pre>
− <code?/proc</code> and <code>/sys</code> are files that map to the hardware. + <code>/proc</code> and <code>/sys</code> are files that map to the hardware.
  * Try   * Try
  <pre>   <pre>
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     return 0;      return 0;
  }   }
  + </pre>
  + 
  Compile and run it   Compile and run it
  <pre>   <pre>



Yoder: Created page with 'Category:ECE597 Category:BeagleBoard  Here's what you need to do to get your Beagle running for the first time.  * Write you Beagle as shown * Insert the SD card * Plug i…'
2010-03-13T18:56:49Z
Created page with 'Category:ECE597 Category:BeagleBoard  Here's what you need to do to get your Beagle running for the first time.  * Write you Beagle as shown * Insert the SD card * Plug i…'
New page
[[Category:ECE597]]

[[Category:BeagleBoard]]



Here's what you need to do to get your Beagle running for the first time.



* Write you Beagle as shown

* Insert the SD card

* Plug in the 5V power

[[File:Hookem.png|500px]]

* Login and look around.  ''Left-click'' on the background to get a menu.  

[[File:Beagle_starting_x-term.png|300px]]

* Try starting an XTerm.

* Try some basic Linux commands

<pre>

ls, cd, less

mplayer

ls /proc

ls /sys

</pre>

<code?/proc</code> and <code>/sys</code> are files that map to the hardware.

* Try

<pre>

cd /sys/class/leds

ls

cd beagleboard::usr0

ls

cat trigger

echo none > trigger

echo 1 > brightness

</pre>

<code>cat trigger</code> tells you what options you can set trigger to.  Try some of them.  Explore <code>/sys</code> and <code>/proc</code> is see what else you can find.



== Homework ==



There are many interesting programs already compiled for the Beagle that aren't on the SD card we gave you.  New applications can be easily installed using the <code>opkg</code> package manager.  When you are back home and connected to the network try:

<pre>

opkg list | less

opkg install gcc

</pre>

The first command lists the packages you can install.  The second command installs the gcc C compiler. With a compiler installed you can take your favorite C program and compile and run it on the Beagle.  Here is the embedded version of '''Hello World''' as presented in ''The Embedded Linux Primer''.

<pre>

#include <stdio.h>



int bss_var;        /* Uninitialized global variable */



int data_var = 1;   /* Initialized global variable */



int main(int argc, char **argv)

{

  void *stack_var;            /* Local variable on the stack */

  

  stack_var = (void *)main;   /* Don't let the compiler */

                              /* optimize it out */



  printf("Hello, World! Main is executing at %p\n", stack_var);

  printf("This address (%p) is in our stack frame\n", &stack_var);



  /* bss section contains uninitialized data */

  printf("This address (%p) is in our bss section\n", &bss_var);



  /* data section contains initializated data */

  printf("This address (%p) is in our data section\n", &data_var);



  return 0;

}

Compile and run it

<pre>

yoder@beagleboard:~$ gcc helloBeagle.c

yoder@beagleboard:~$ ./a.out

Hello, World! Main is executing at 0x8380

This address (0xbefa1cf4) is in our stack frame

This address (0x10670) is in our bss section

This address (0x10668) is in our data section

</pre>

This is a program I use what talking about the address spaces on the Beagle and virtual memory.



Try some of your own C programs.  See how well they run. If you come up with something interesting, add them to the wiki.

← Older revision		Revision as of 13:31, 28 April 2011
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	[[Category:BeagleBoard]]		[[Category:BeagleBoard]]
	[[Category:Workshops]]		[[Category:Workshops]]