A PCRE internal error occured. This might be caused by a faulty plugin

====== About ====== This short tutorial describes how to get GPIO working. For this you need tool called ''gpioctl''. Table describing which pin is where can be found here: [[carambola_pinout|]]. ====== Building/installing ====== * Type ''make menucongfig'' * Under ''Utilities'' select package ''gpioctl'' and build carambola firmware (although you can do it directly on carambola typing ''opkg update; opkg install gpioctl'') * In latest revisions gpioctl become deprecated. If you still need to use it, install from [[http://pkg.8devices.com/v2.2/carambola/packages/gpioctl_1.0-1_ramips.ipk|older repository]]. ====== Testing ====== ===== Prepare GPIO as output ===== gpioctl dirout 1; gpioctl dirout 2 ===== Set both to 1 ===== gpioctl set 1; gpioctl set 2 ===== Clear both ===== gpioctl clear 1; gpioctl clear 2 ===== Read status ===== gpioctl dirin 1; gpioctl dirin 2; gpioctl get 1; gpioctl get 2 ====== Controlling gpio pins as files in /sys ====== Another method for controlling gpios using files instead of commands: cd /sys/class/gpio echo 1 > export this will make the virtual directory "gpio1" available in /sys/class/gpio/gpio1 inside "gpio1" you will find, among others: * direction ("in" or "out") * value (0 or 1) Just write/read those file to do I/O. For example echo out > direction echo 1 > value will put the pin in output mode and high echo in > direction cat value will read the pin instead

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