Driving Beaglebone GPIO through /dev/mem

Question

I\'m trying to write a C program for blinking a LED on the Beaglebone. I know I can use the sysfs way...but I\'d like to see if it is possible to get the same result mapping

Answer 1

Be careful. This works at first blush, but it directly writes to a register that the GPIO controller driver believes it owns. It will cause odd and hard to track down side effects, either on this GPIO line or on a GPIO that is in the same bank. For this to work reliably you need to disable the entire bank from the kernel GPIO driver.