Is anyone try to use Uart flow control on Jetson Nano J1, I found some problem.
I need to use RTS signal on J41 pin 11 but is not working.
first I modify DTS with Excel like pictue, recompile and edit “/boot/extlinux/extlinux.conf” verify kernel is use new dtb file with dmesg like picture.
i test with 2 method
first with “https://github.com/cbrake/linux-serial-test” enable rtscts control uart can transmit but no voltage change on rts and cts pin.
second i test with command “sudo /sbin/getty -L 9600 ttyTHS1 -h” -h mean enable flow control. but result same as method one.
third i test with my C code by uart config like the picture, same result.
i verify with logic analyzer, it no level change on rts and cts pin but change on tx and rx signal.
my test environment.
jetson nano devkit rev b01
i verify that pin 11 on J41 is working by control gpio test.
what I missing or need to modify other to enable uart flow control?