I use colibri imx6 linux computer on module . when ı set gpio 40 like this
echo 40 > /sys/class/gpio/export echo high > /sys/class/gpio/gpio40/direction
I could not communicate with ttymxc2. I sent data over ttymxc2 but could not get any data …
I set gpio 40 pin high because I must use RS232 B for my gprs modem.
in this state I have a gprs modem connected to ttymxc1, I have a telit module connected to ttymxc2 that was sending a data but could not get data, I have a ttymxc 0 I use this port for communicate colibri imx6
how I can ı fix this problem ?