Hi
I have a board model firefly-rk3399, i installed ubunu 16.I want to send a signal with one free GPIO
The problem is I don’t have a clue on how to do this.
I found ( /sys/class/gpio )and did the following.
echo 12 > export
cd /sys/class/gpio/gpio12
echo “out” > direction and echo 1 > value
But did not work and please guide???
thanks
According to the new version of the kernel.
U need to set gpio12 to gpio1012 .
My Signal is very weak, but it seems to be working gpio12… i plug a led on the signal coming from the board but the brightness is almost nothing…
Any suggestion about boosting the signal coming from the gpio?
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