Curious why using mmap IO I can only toggle a GPIO pin (P8_12) at 2.78MHz. It seemed fast to me but my coworkers are laughing and saying its pathetic ;)
My code: https://dl.dropboxusercontent.com/u/82765462/BBB/gpio.c Borrowed from Mark Yoder's example: http://elinux.org/EBC_Exercise_11b_gpio_via_mmap Same result as this person: http://chiragnagpal.com/examples.html Compile: gcc -o gpio gpio.c Then run: echo 44 > /sys/class/gpio/export echo "low" > /sys/class/gpio/gpio44/direction Then ./gpio And measure on a scope... Screenshot: https://dl.dropboxusercontent.com/u/82765462/BBB/gpio_mmap.jpg -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
