GPIO does not turn on LED

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21

Hi Matt,

yes, working on embedded Linux and developing hardware designs is may daily job.

Capes can be seen as addons (shields, breakout boards, ...) for the beaglebone.
They bring out built in hardware features from the bone or extend the bone with new hardware functions.
Here you can find some capes: http://beagleboard.org/cape

Nice to hear, that you successfully could complete your testing.

regards
Ralf

22

Hi Ralf,

It’s great for you that you get to work in R&D, in such great fields as Embedded Linux and HW design!

You had ARM Experience before the BBB?

Where did you start learning on Embedded OS (as Linux) and on ARMs?

I come from the PIC world OS-less, and ARM with Linux (BBB) is so different to me!

Yes, thanks to you the PINMUX works well.
I’m now reading on how to configure GPIO Pins to generate interrupt.
The hard part is setting the Interrupt Handler.

Was it straight-forward for you to work with interrupts?

23

Hi Ralf,

It’s great for you that you get to work in R&D, in such great fields as Embedded Linux and HW design!

You had ARM Experience before the BBB?

Where did you start learning on Embedded OS (as Linux) and on ARMs?

I come from the PIC world OS-less, and ARM with Linux (BBB) is so different to me!

Yes, thanks to you the PINMUX works well.
I’m now reading on how to configure GPIO Pins to generate interrupt.
The hard part is setting the Interrupt Handler.

Was it straight-forward for you to work with interrupts?

All the training you need is here:

http://free-electrons.com/docs/

The training material is up to date and includes DeviceTree material.

Another good reference are Linux books by Robert Love, namely “Linux Kernel Development” and "Linux System Programming”. I like selected these because they are much more current than "Linux Device Drivers 3rd edition” but the updated version is due in July 2014.

Regards,
John