Getting Code Composer into BB-xm for testing.

GoogleGroups
1

Right now I need to write a simple "blink the LED" app for BB-xm.
However, I can't figure out how to get it into BB-xm to test it, and
how to access the low level stuff like that. Ultimately, I need to be
able to access the hardware itself and skip the OS..so below the OS.
Any help?

2

You are in luck. You landed the FAQ answer of the week...

Compiling anything to blink an LED is overkill. The quick answer is
just use the kernel: http://www.kernel.org/doc/Documentation/gpio.txt

If you are stuck on using CCS, that is available for download, so:
http://processors.wiki.ti.com/index.php/Category:Code_Composer_Studio_v5

There is an SDK that might help you get started with step-by-step
instructions, so: http://processors.wiki.ti.com/index.php/Sitara_SDK_5.03.02_Release_Notes

CCS is Eclipse, so this might help a bit in thinking about it a bit
broader: http://www.lvr.com/eclipse1.htm

The hardware is abstracted, so just use the abstractions:
http://www.beagleboard.org/~arago/education/presentations/Learning_Linux_Tops_Down.pdf

If you are hung-up on accessing the registers directly, google the
application 'devmem2' and see how to map registers from userspace.

3

> Right now I need to write a simple "blink the LED" app for BB-xm.
> However, I can't figure out how to get it into BB-xm to test it, and
> how to access the low level stuff like that. Ultimately, I need to be
> able to access the hardware itself and skip the OS..so below the OS.
> Any help?

Oh, and if you really want to skip the OS, I suggest you look at the u-
boot SPL code and create your own MLO: U-Boot / U-Boot ยท GitLab

You can also check out PuppyBits: Google Code Archive - Long-term storage for Google Code Project Hosting.

4

I am indebted to you! Thank you much for your assistance and research.
Actually, I don't need to do that project specifically [LEDs], I just
needed a project to test code at that level, and that allowed an
outcome I could see. Any further suggestions? And again your help is
very much appreciated!

5

What *is* Puppybits??? There's no there there.

A handful of source files, no documentation... no
activity since April 2010.

/Rafe