I would like to use UART4 interface on BeagleBone Blue. Unfortunately only UART4_RX pin is working.
I already made modification where I soldered cable to put out UART4_TX pin, but I cannot use it as UART pin.
I found out that the pin name is P9_13 here: beaglebone-blue/BeagleBone_Blue_Pin_Table.csv at master · beagleboard/beaglebone-blue · GitHub
I tried to configure it as uart, but config-pin cannot find the appropriate file:
debian@beaglebone:~$ config-pin -l P9.13
ERROR: open() for /sys/firmware/devicetree/base/ocp/P9_13_pinmux/pinctrl-names failed, No such file or directory
I started looking into .dts overlay method:
but I’m not sure if this is right problem solve direction.
Can someone help me to configure pin P9_13 as UART_TX?