GPIO/Analog programming for BeagleBone Black on Angstrom Linux, what compiler for cross development on Windows?
I'm working on a BeagleBone Black (BBB from now on) with its stock Angstrom Linux.
I'm able to do GPIO/Analog programming using JavaScript, but I want to do it in C/C++.
I know the sysfs thing and /dev/mem, I want to know how to configure the GPIO and analog pins.
I can write C/C++ code for GPIO/analog reading writing, but have no clue what to do for initialization.
One way is the Device Tree Overlay, but I don't want to go for two different things for one purpose, since I can understand that it can be done in C/C++ but how??
It'll be helpful if I could alongside get some example related to both sysfs and /dev/mem for configuring+r/w of gpio &/or analog pins of the BBB (on Angstrom Linux, if this matters)
Answer
Derek Molloy has a great series of videos describing exactly how to do this, and more. His BeagleBone site has this address: http://derekmolloy.ie/beaglebone/
For C/C++ cross-development, the recommended path is to use Eclipse in Linux on your desktop computer. I personally run Ubuntu in VirtualBox under Windows. Derek Molloy describes this in full detail: http://derekmolloy.ie/beaglebone/setting-up-eclipse-on-the-beaglebone-for-c-development/
With the Beaglebone Black kernel (3.8), configuration can be done using Devicetree. It is shown in great detail in this video: http://derekmolloy.ie/beaglebone/beaglebone-gpio-programming-on-arm-embedded-linux/