Setting up the alternative function of NanoPi Neo pins in Allwinner sunxi Posted June 19, 2020 Hello, I use the NanoPi Neo (4.19.38-sunxi, Armbian #5.85 ) to pool an external device over /dev/ttyS1 serial port. At flashing moment of the external device, I should switch pins of ttyS1 to input mode by using bash commands #!/bin/bash firmware=`ls update_*.hex` echo "198" > /sys/class/gpio/export echo "199" > /sys/class/gpio/export echo "in" > /sys/class/gpio/gpio198/direction echo "in" > /sys/class/gpio/gpio199/direction # device update flash -P linuxgpio -b 40000 $firmware echo "198" > /sys/class/gpio/unexport echo "199" > /sys/class/gpio/unexport Is it possible to change up the mode of pins to the alternate function (ALT5) without the rebooting the OS? 0
Setting up the alternative function of NanoPi Neo pins
in Allwinner sunxi
Posted
Hello, I use the NanoPi Neo (4.19.38-sunxi, Armbian #5.85 ) to pool an external device over /dev/ttyS1 serial port. At flashing moment of the external device, I should switch pins of ttyS1 to input mode by using bash commands
Is it possible to change up the mode of pins to the alternate function (ALT5) without the rebooting the OS?