Re: serial, basic stuff
- Reply: Dag-Erling_Smørgrav : "Re: serial, basic stuff"
- In reply to: Jon Clausen : "Re: serial, basic stuff"
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Date: Sun, 21 Apr 2024 12:32:37 UTC
On 2024-04-21 12:06:39 (+0200), Jon Clausen wrote: > On 2024-04-21 11:32:00 (+0200), Dag-Erling Smørgrav wrote: > > disable the serial console on either or both (add `console="vidconsole"` > > to /etc/loader.conf, make sure you don't have `-D`, `-P`, or `-h` in > > /boot.config or /boot/config) and make sure getty is running on port 1 > > instead (change `onifconsole` to `on` on the ttyu1 line in /etc/ttys). > I think I'd rather leave the port0 setup as is, and just use port1 (on both > systems) for now. > > This means I'll need to get getty set up on one side, and make the > connection from the other side. Once I have a working setup like that, I can > then start working towards the port1(client) to port0(server) setup Right. Once I had the wires connected correctly, changed 'onifconsole' to 'on' in /etc/ttys, and issued `kill -HUP 1`, things started working. So after I had a successful connection jh05:cuau1 <-> jh06:ttyu1 using the default settings, I then went on to increase the speed from 9600 to 115200. This worked as well, so I now have a working "high speed" setup. So at this point, I should be ready to move on to attempting the setup that I actually want: jh05:cuau1 <-> jh06:ttyu0 This does not work out of the box. Assuming that the RS232/TTL adapter works, and that I have made the connections correct this time, I suppose the difference in settings between the devices might need aligning. This is what I have currently: root@jh05:~ # stty -a -f /dev/cuau1.init speed 115200 baud; 0 rows; 0 columns; lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl -echoprt -altwerase -noflsh -tostop -flusho -pendin -nokerninfo -extproc iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -ignbrk brkint -inpck -ignpar -parmrk oflags: opost onlcr -ocrnl tab0 -onocr -onlret cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow -dtrflow -mdmbuf rtsdtr cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>; eol2 = <undef>; erase = ^?; erase2 = ^H; intr = ^C; kill = ^U; lnext = ^V; min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T; stop = ^S; susp = ^Z; time = 0; werase = ^W; root@jh05:~ # root@jh06:~ # stty -a -f /dev/ttyu0.init speed 115200 baud; 0 rows; 0 columns; lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl -echoprt -altwerase -noflsh -tostop -flusho -pendin -nokerninfo -extproc iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -ignbrk brkint -inpck -ignpar -parmrk oflags: opost onlcr -ocrnl tab0 -onocr -onlret cflags: cread cs8 -parenb -parodd hupcl clocal -cstopb -crtscts -dsrflow -dtrflow -mdmbuf rtsdtr cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>; eol2 = <undef>; erase = ^?; erase2 = ^H; intr = ^C; kill = ^U; lnext = ^V; min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T; stop = ^S; susp = ^Z; time = 0; werase = ^W; root@jh06:~ # And this is where I could use some (more) guidance. I'd like to keep ttyu0 more or less as-is, so that I can connect to them as usual (with a USB-to-serial adapter) when I'm physically near the machines. But I guess the cuau1 settings, which - except for the speed - are unmodified since OS install, sort of reflect the fact that these ports do not have the full "RS232" set of wires. So just copy/pasting the settings from ttyu0 onto cuau1 might not be the proper thing to do. There are a lot of permutations here... :P Any recommendations? br /jon -- YMMV