We are interfacing dot matrix led to x27 connector of Ixora-iMX6 evaluation board. Using bit-bang method , we want to send data and clock to dot matrix led.
I have used below gpio’s of x27 connector ;
GPIO2_IO04 as data line
GPIO2_IO05 as clock line
GPIO2_IO06 as chip select
GPIO2_IO07 as control line
Now i want to toggle above gpio’s. as a initial plan, i have tried using sysfs to toggle gpio’s.
But none of the above 4 gpio’s are toggling using below commands;
echo 36 > /sys/class/gpio/export
echo “out” > direction
echo 1 > value
I am using imx6q-apalis-ixora.dtb file. Any pointer on above issue.