ECE597 Lab 1 Wiring and Running the Beagle - Revision history

Peter Huewe at 20:48, 27 October 2011

2011-10-27T20:48:16Z

Batydm at 01:53, 19 March 2010

2010-03-19T01:53:18Z

Batydm: "wire your..."

2010-03-19T01:53:04Z

"wire your..."

Yoder at 19:01, 13 March 2010

2010-03-13T19:01:36Z

Yoder at 16:40, 13 March 2010

2010-03-13T16:40:59Z

Yoder: Added Category

2010-03-13T16:40:42Z

Added Category

Yoder at 16:11, 13 March 2010

2010-03-13T16:11:24Z

Yoder: Added Homework

2010-03-13T16:08:57Z

Added Homework

New page

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.

← Older revision		Revision as of 20:48, 27 October 2011
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	Try some of your own C programs. See how well they run. If you come up with something interesting, add them to the wiki.		Try some of your own C programs. See how well they run. If you come up with something interesting, add them to the wiki.
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← Older revision		Revision as of 19:01, 13 March 2010
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−	~~[[Category:ECE597]]~~
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	Here's what you need to do to get your Beagle running for the first time.		Here's what you need to do to get your Beagle running for the first time.

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 [[Category:ECE597]]
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 Here's what you need to do to get your Beagle running for the first time.

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		+	[[Category:ECE597]]
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	Here's what you need to do to get your Beagle running for the first time.		Here's what you need to do to get your Beagle running for the first time.

← Older revision		Revision as of 16:11, 13 March 2010
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	This is a program I use what talking about the address spaces on the Beagle and virtual memory.		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.	+	Try some of your own C programs. See how well they run. If you come up with something interesting, add them to the wiki.

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 Here's what you need to do to get your Beagle running for the first time.
-* Wiree your Beagle as shown
+* Wire your Beagle as shown
 * Insert the SD card
 * Plug in the 5V power