Re: USB output in ucom

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

On Sun, Jul 13, 2025 at 09:16:17AM +0000, RVP wrote:
> Does the link have working HW flow control (RTS/CTS)? If only 3 wires are
> active (Rx/Tx/GND), then you'll have to set very low speeds.

The link has hardware flow-control, and it can work at 115200 bps in 
other contexts. I tired addinc CRTSCTS to control flags, it does
not change much
                        struct termios t;
 
                        memset(&t, 0, sizeof(t)); 
                        t.c_ispeed = ucomcons_speed;
                        t.c_ospeed = ucomcons_speed;
                        t.c_cflag = tp->t_cflag ;
                        SET(t.c_cflag, CLOCAL|CRTSCTS);
                        CLR(t.c_cflag, HUPCL);
                        (void)ucomparam(tp, &t); 

Input received on the other end:
"6"
"E"
"LL"
"O"
" "
"W"
"O"
"R"
"L"
"D"
"!\r"
"\n"
"X"
"x"



-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost